CN104671621A - Treatment method for sludge in municipal sewage treatment plant - Google Patents
Treatment method for sludge in municipal sewage treatment plant Download PDFInfo
- Publication number
- CN104671621A CN104671621A CN201510042419.8A CN201510042419A CN104671621A CN 104671621 A CN104671621 A CN 104671621A CN 201510042419 A CN201510042419 A CN 201510042419A CN 104671621 A CN104671621 A CN 104671621A
- Authority
- CN
- China
- Prior art keywords
- mud
- sludge
- heavy metal
- ammonia
- modification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/26—Carbonates or bicarbonates of ammonium
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Wood Science & Technology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a treatment method for sludge in a municipal sewage treatment plant and belongs to the technical field of sludge treatment. The technical scheme adopted by the treatment method is as follows: the treatment method is characterized in that sludge in the municipal sewage treatment plant is subjected to harmless processing and treatment through the processing steps of dehydration, modification and heavy metal treatment, and treated sludge conforms to the national pollutant control standard of agricultural sludge. Compared with the prior art, the treatment method is novel, reliable and free of secondary pollution, changes waste into valuable, realizes harmless treatment of sludge, realizes the outstanding substantial characteristic of resourceful treatment and makes remarkable progress.
Description
Technical field
The present invention relates to and relate to chemical industry and environmental technology field, particularly relate to a kind of technical field for the treatment of process of urban wastewater treatment firm mud.
Background technology
In recent years, along with the quick raising of wastewater treatment in China ability, sludge quantity also synchronously significantly increases.By in by the end of March, 2013, whole nation the planned city, county add up to build up urban wastewater treatment firm 3451, sewage treatment capacity about 1.45 billion cubic meters/day, year produces more than 3,500 ten thousand tons, the mud of water content 80%, and increases progressively with the sewage work of about 120 every year.According to statistics, about 80% Sewage Plant has the thickening facility of mud, reaches minimizing to a certain degree.But about there is the mud of 80% without stabilization treatment, land is transferred to containing pollutents such as repugnant substance, pathogenic agent, persistent organisms from sewage in mud, cause pollutent to spread further, the environment building up the sewage treatment facility put into operation is had a greatly reduced quality with reduction of discharging benefit.36 the key cities' specific resistance to filtration rates in the whole nation reach 80%, and other the planned cities reach 70%, and county town and emphasis town reach 30%.And China's urban wastewater treatment firm mud has that floor space is large, water pollution, soil pollution, bacteria breed, topsoil etc. five endanger greatly.And in current disposal options, landfill accounts for 63.0%, sludge aerobic fermentation+agricultural accounts for 13.5%, mud nature mummification comprehensive utilization accounts for 5.4%, sludge incineration accounts for 1.8%, mud air storage and outward transport respectively account for 1.8% and 14.4%.In fact, the mud overwhelming majority of landfill, air storage and outward transport belongs to random disposal, and the ratio really realizing safe disposal is no more than 20%, and sludge treatment situation is very severe.Restrict a lot of because have of specific resistance to filtration Facilities Construction, but national specific resistance to filtration general technical route is not clearly one of important restriction factor.For improving China's specific resistance to filtration state of the art further, conscientiously the requirement of sewage sludge harmlessness, minimizing, stabilization, resource utilization is reached, avoid the secondary pollution caused thus, alleviate sludge yield and the delayed contradiction of sludge treatment ability, China has put into effect a series of policy, planning in recent years.Its Chinese Home to be combined by house and town and country construction portion, Environmental Protection Department, the Department of Science and Technology in 2009 and has been issued " urban wastewater treatment firm specific resistance to filtration and pollution prevention technique policy (trying) "; Within 2011, house town and country construction portion, National Development and Reform Commission organize in concert and have worked out " urban wastewater treatment firm specific resistance to filtration technical manual (trying) "; Execution plays " urban drainage and sewage disposal regulations " on January 1st, 2014 in country, within 2014, " 65 " China's World Environment Day themes as " declaring a war to pollution ", and to the main direction that pollution is declared a war be: in-depth prevention and control of air pollution, fortified water prevention and cure of pollution, do a good job of it remediation contaminated soil, strengthen heavy metal, chemical and Hazardous Wastes Management and prevent and treat dynamics, in-depth industrial pollution control.As can be seen here, China has a high potential on specific resistance to filtration, and Rapid development stage is stepped in specific resistance to filtration market.Therefore, seek a kind of newly, reliably, the urban wastewater treatment firm method for sludge treatment of non-secondary pollution, safety and environmental protection is for those skilled in the art of the present technique being really a technical task urgent and urgently to be resolved hurrily.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, and provide a kind of newly, reliably, the urban wastewater treatment firm method for sludge treatment of non-secondary pollution, safety and environmental protection.
Another technical problem to be solved by this invention overcomes the deficiencies in the prior art, and provide a kind of newly, reliably, non-secondary pollution, turn waste into wealth, efficiency of investment is high, the treatment process of the urban wastewater treatment firm mud of instant effect.
For solving above-mentioned technical problem, the present invention adopts to be implemented as follows technical scheme: 1. the treatment process of a urban wastewater treatment firm mud, it is characterized in that urban wastewater treatment firm mud to carry out harmless processing process by the processing step of dehydration modification, heavy metal process, the mud after process meets pollutant catabolic gene standard in the agricultural sludge of national requirements.
For solving above-mentioned technical problem further, the preferred version of technique scheme is:
Be provided with after heavy metal treatment process steps described above and mud after process is carried out to distillation extraction commingled crude, extracts the processing step of volatile salt.
Dehydration modification procedure described above is:
1. activation modifier: the usage quantity taking powdered modified dose in the ratio of the 0.05-0.1% of single treatment mud weight, the ratio being 1:1.1-1.3 in the ratio of powdered modified dose of usage quantity and water again takes tap water and is placed in container and stirs with powdered modified dose, places 18-24 hour;
2. diluting modification agent: add the tap water that its weight ratio is 1:15-20 and stir in step liquid state properties-correcting agent 1.;
3. spraying modified dose: the properties-correcting agent spraying plant after step 2. being diluted divides the Sludge Surface to be modified being sprayed on for 2-3 time and being laid in modification ditch, sprinkling limit, limit is stirred to evenly;
4. buttress fermentation is played: step mud is 3. played buttress fermentation, stacking height is at 75-80cm; Under the condition of outside air temperature T >=20 DEG C, mud temperature after 24 hours of fermenting can reach more than 40 DEG C; Ferment after 48 hours, in mud, protein complete hydrolysis is amino acid; Amino acid in mud completes desamination reaction and its ammonia generated first react with water and generates ammonium hydroxide, and the iron trichloride in ammonium hydroxide and mud and aluminum chloride react and generate ammonium chloride, realize fixing of ammonia;
5. ferment control: before modification in the fermentation time of 72-96 hour, turned over buttress once every 8 hours; When modification zymosimeter after 96 hours, every 2 hours monitoring primary sludge internal temperatures, need when temperature reaches more than 60 DEG C to carry out turning over buttress, be beneficial to heat radiation and sludge water content volatilization, within continuing fermentation 144-240 hour, namely complete dehydration modification again, modified moisture percentage in sewage sludge is reduced to 25-30%.
Heavy metal process described above is that the calcium hydroxide adding glucose powder and the 0.1-0.3% accounting for mud gross weight 0.001-0.003% in the mud after modification mummification also fully mixes, heat under the condition of mud temperature >=100 DEG C at machinery, the ammonia that ammonium chloride in mud and calcium hydroxide reaction generate mixes with water vapour rapidly and heavy metal ion in mud is combined the complex compound forming ammonia, the complex compound of the heavy metal and the ammonia that generate and the glucose powder generation redox reaction be mixed in mud, heavy metal ion valency is impelled to reduce or be directly reduced to simple substance, fail the heavy metal of complete stability and carry out follow-up distillation along with mud, after mud distillation, remaining fixed carbon temperature is more than 450 DEG C, fixed carbon can carry out adsorbing the relative anaerobic environment of formation to the heavy metal in mud, and the heavy metal after absorption is reduced further under high temperature, anoxia condition.
The processing step of extraction commingled crude described above is: by modified and send in mud distiller through the mud of heavy metal process and carry out normal pressure, low-temperature distillation, distill out oil gas when distilling room temp and reaching 300-350 DEG C, oil gas obtains commingled crude through the cooling of oil gas cooling system.
The processing step of extraction volatile salt described above is: the nitrogen of protein in dehydration modifying process composition mud is converted into ammonia after proteolysis, amino acid deamination reaction; The iron trichloride added in ammonia and sludge press filtration process and aluminum chloride react and generate ammonium chloride, realize ammonia fixing after, add in mud and account for its weight 1-3% and be greater than 300 object Paris whites, more than 100 DEG C are reached through heating to mud temperature, ammonium chloride in mud and Paris white reaction generate the mixing steam of volatile salt and water, obtain volatile salt crystal through cooling.
The present invention compared with prior art has following outstanding substantive distinguishing features and significant progress:
First treatment process of the present invention is that urban wastewater treatment firm mud is carried out harmless treatment by the processing step of dehydration modification, heavy metal process, and the mud after its process meets pollutant catabolic gene standard in the agricultural sludge of national requirements.This treatment process achieves dehydration and the heavy metal process of mud, for sludge reduction and harmless treatment provide one new, reliably, non-secondary pollution, the technical scheme of safety and environmental protection, conscientiously sewage sludge harmlessness is reached, minimizing, the technical requirements of stabilization, not only overcome urban wastewater treatment firm mud floor space large, water pollution, soil pollution, bacteria breed, topsoil etc. five endanger greatly, and overcome the secondary pollution that prior art causes, the halfway fatal technological deficiency of safe disposal, correct safe disposal is carried out to urban wastewater treatment firm mud, for alleviating sludge yield and the delayed contradiction of sludge treatment ability has played positive effect, thus make the treatment process of a kind of urban wastewater treatment firm mud of the present invention compared with prior art have outstanding substantive distinguishing features and significant progress.
It two is that treatment process of the present invention also comprises processing step urban wastewater treatment firm mud being carried out after modification distillation extraction commingled crude, extract volatile salt.This treatment process not only can be extracted has higher-value, the in demand commodity in market, and for reducing the processing costs of mud, improve Business Economic Benefit and provide reliable technical guarantee, reach and accomplished the effect of recycling treatment while realizing sewage sludge harmlessness process.Particularly in today of Chinese national economy develop rapidly, for avoiding the secondary pollution because sludge treatment causes, alleviate sludge yield and the delayed contradiction of sludge treatment ability, further raising China specific resistance to filtration state of the art, practical solution sewage sludge harmlessness, minimizing, stabilization, the technical problem of resource utilization provide one new, reliable technical scheme, this technical scheme will be the secondary pollution reduced and radical cure brings because of sludge disposal, improve environmental greening level and the living environment improving our people, the offspring that benefits future generations has positive promoter action, thus make the treatment process of a kind of urban wastewater treatment firm mud of the present invention compared with prior art have outstanding substantive distinguishing features and significant progress.
Embodiment
The specific implementation process of the method for innocent treatment of a kind of urban wastewater treatment firm mud of the present invention is described in detail below in conjunction with embodiment.
Embodiment 1:
The treatment process of a kind of urban wastewater treatment firm mud of the embodiment of the present invention 1, be meet exposed river, cities and towns, mud that lake produces carries out being treated to prerequisite, it is that mud is carried out harmless processing process by the processing step of dehydration modification, heavy metal process, and the mud after process meets pollutant catabolic gene standard in the agricultural sludge of national requirements.
Dehydration modification procedure described in it is:
1. activation modifier: in single treatment mud weight 0.05% ratio take the usage quantity of powdered modified dose, the ratio being 1:1.1 in the ratio of powdered modified dose of usage quantity and water again takes tap water and is placed in container and stirs with powdered modified dose, places 18 hours;
2. diluting modification agent: will the tap water that its weight ratio is 1:15 be added in step liquid state properties-correcting agent 1. and stir;
3. spraying modified dose: the properties-correcting agent spraying plant after step 2. being diluted divides the Sludge Surface to be modified being sprayed on for 2 times and being laid in modification ditch, sprinkling limit, limit is stirred to evenly;
4. buttress fermentation is played: step mud is 3. played buttress fermentation, stacking height is at 80cm; When playing buttress outside air temperature T >=20 DEG C condition under, mud temperature after 24 hours of fermenting can reach more than 40 DEG C; Ferment after 48 hours, in mud, protein complete hydrolysis is amino acid; When fermenting that after 48 hours, mud temperature can reach 40-60 DEG C, continue fermentation, amino acid in mud completes desamination reaction and its ammonia generated first react with water and generates ammonium hydroxide, and the iron trichloride in ammonium hydroxide and mud and aluminum chloride react and generate ammonium chloride, realize fixing of ammonia;
5. ferment control: before modification in the fermentation time of 72-96 hour, carried out turning over buttress once every 8 hours; When modification zymosimeter after 96 hours, monitoring in an every 2 hours temperature, needs when temperature reaches more than 60 DEG C to carry out turning over buttress, is beneficial to heat radiation and sludge water content volatilization, namely continuing fermentation completes dehydration modification in 144 hours again, and modified moisture percentage in sewage sludge is reduced to 25-30%.
Heavy metal process described above is that the calcium hydroxide adding glucose powder and 0.1% accounting for 0.001% of mud gross weight in the mud after modification mummification also fully mixes, heat under the condition of mud temperature >=100 DEG C at machinery, the ammonia that ammonium chloride in mud and calcium hydroxide reaction generate mixes with water vapour rapidly and heavy metal ion in mud is combined the complex compound forming ammonia, the complex compound of the heavy metal and the ammonia that generate and the glucose powder generation redox reaction be mixed in mud, impel the reduction of heavy metal ion valency or be directly reduced to simple substance.
It is more than the implementation process of the treatment process of a kind of urban wastewater treatment firm mud of the embodiment of the present invention 1.
Embodiment 2:
The embodiment of the present invention 2 a kind of is applicable to the treatment process of the urban wastewater treatment firm mud under outside air temperature T > 20 DEG C of conditions, that urban wastewater treatment firm mud is carried out harmless processing process by the processing step of dehydration modification, heavy metal process, mud after process carries out distillation extraction commingled crude, extracts the processing step of volatile salt, and the mud after its process meets pollutant catabolic gene standard in agricultural sludge.
Dehydration modification procedure described in it is:
1. activation modifier: in single treatment mud weight 0.08% ratio take the usage quantity of powdered modified dose, the ratio being 1:1.3 in the ratio of powdered modified dose of usage quantity and water again takes tap water and is placed in container and stirs with powdered modified dose, places 24 hours;
2. diluting modification agent: will the tap water that its weight ratio is 1:20 be added in step liquid state properties-correcting agent 1. and stir;
3. spraying modified dose: the properties-correcting agent spraying plant after step 2. being diluted divides the Sludge Surface to be modified being sprayed on for 3 times and being laid in modification ditch, sprinkling limit, limit is stirred to evenly;
4. buttress fermentation is played: step mud is 3. played buttress fermentation, stacking height is at 75cm; When playing buttress outside air temperature T >=20 DEG C condition under, mud temperature after 24 hours of fermenting can reach more than 40 DEG C; Ferment after 48 hours, in mud, protein complete hydrolysis is amino acid; When fermenting that after 48 hours, mud temperature can reach 40-60 DEG C, continue fermentation, the amino acid that proteolysis generates completes desamination reaction, and the iron trichloride added in ammonia and sludge press filtration process that reaction generates and aluminum chloride react and generate ammonium chloride, realizes fixing of ammonia;
5. ferment control: before modification in the fermentation time of 72-96 hour, carried out turning over buttress once every 8 hours; When modification zymosimeter after 96 hours, monitoring in an every 2 hours temperature, needs when temperature reaches more than 60 DEG C to carry out turning over buttress, is beneficial to heat radiation and sludge water content volatilization, namely continuing fermentation completes dehydration modification in 240 hours again, and modified moisture percentage in sewage sludge reduces most 25-30%.
Heavy metal treatment process steps described above is: add in the mud after modification mummification account for mud gross weight 0.003% glucose powder and 0.3% calcium hydroxide and fully mix, heat under the condition of mud temperature >=100 DEG C at machinery, the ammonia that ammonium chloride in mud and calcium hydroxide reaction generate mixes with water vapour rapidly and heavy metal ion in mud is combined the complex compound forming ammonia, the complex compound of the heavy metal and the ammonia that generate and the glucose powder generation redox reaction be mixed in mud, heavy metal ion valency is impelled to reduce or be directly reduced to simple substance, fail the heavy metal of complete stability and carry out follow-up distillation along with mud, after mud distillation, remaining fixed carbon temperature is more than 450 DEG C, fixed carbon can carry out adsorbing the relative anaerobic environment of formation to the heavy metal in mud, and the heavy metal after absorption is reduced further under high temperature, anoxia condition.
Extraction commingled crude processing step described above is: by modified and send in mud distiller through the mud of heavy metal process and carry out normal pressure, low-temperature distillation, when distilling room temp and reaching 300-350 DEG C retortable go out oil gas, oil gas obtains commingled crude through the cooling of oil gas cooling system.
The processing step of extraction volatile salt described above is: in dehydration modifying process, and in composition mud, the nitrogen protein of protein generates ammonia after proteolysis, amino acid deamination reaction; The amino acid added in ammonia and sludge press filtration process completes desamination reaction and iron trichloride in its ammonia generated and mud and aluminum chloride react and generate ammonium chloride, realize ammonia fixing after, add in mud account for its weight 3% and be greater than 300 object Paris whites, heat to mud temperature through machinery and reach more than 100 DEG C, ammonium chloride in mud and Paris white reaction generate the mixing steam of volatile salt and water, obtain volatile salt crystal through cooling.
It is more than the implementation process of the treatment process of a kind of urban wastewater treatment firm mud of the embodiment of the present invention 2.
Embodiment 3:
The embodiment of the present invention 3 a kind of is applicable to the treatment process of urban wastewater treatment firm mud under outside air temperature T < 20 DEG C of conditions, that urban wastewater treatment firm mud is carried out harmless processing process by the processing step of dehydration modification, heavy metal process, mud after process carries out distillation extraction commingled crude, extracts the processing step of volatile salt, and the mud after its process meets pollutant catabolic gene standard in agricultural sludge.
Dehydration modification procedure described in it is:
1. reactivity agent: in single treatment mud weight 0.1% ratio take the usage quantity of powdered modified dose, the ratio being 1:1.2 in the ratio of powdered modified dose of usage quantity and water again takes tap water and is placed in container and stirs with powdered modified dose, places 20 hours;
2. diluting modification agent: will the tap water that its weight ratio is 1:18 be added in step liquid state properties-correcting agent 1. and stir;
3. spraying modified dose: the properties-correcting agent spraying plant after step 2. being diluted divides the Sludge Surface to be modified being sprayed on for 2 times and being laid in modification ditch, sprinkling limit, limit is stirred to evenly;
4. buttress fermentation is played: step mud is 3. played buttress fermentation, stacking height is at 80cm; Under the condition of outside air temperature T≤20 DEG C, mud temperature after 48 hours of fermenting can reach more than 40 DEG C; Ferment after 72 hours, in mud, protein complete hydrolysis is amino acid, and mud temperature can reach 40-60 DEG C; Continue fermentation, the amino acid that proteolysis generates completes desamination reaction, and the iron trichloride added in ammonia and sludge press filtration process that reaction generates and aluminum chloride react and generate ammonium chloride, realizes fixing of ammonia;
5. ferment control: before modification in the fermentation time of 72-96 hour, carried out turning over buttress once every 8 hours; When modification zymosimeter after 96 hours, monitoring in an every 2 hours temperature, needs when temperature reaches more than 60 DEG C to carry out turning over buttress, is beneficial to heat radiation and sludge water content volatilization, namely continuing fermentation completes dehydration modification in 240 hours again, and modified moisture percentage in sewage sludge reduces most 25-30%.
Heavy metal treatment step described above is: the calcium hydroxide adding glucose powder and 0.2% accounting for 0.002% of mud gross weight in the mud after modification mummification also fully mixes, heat under the condition of mud temperature >=100 DEG C at machinery, the ammonia that ammonium chloride in mud and calcium hydroxide reaction generate mixes with water vapour rapidly and heavy metal ion in mud is combined the complex compound forming ammonia, the complex compound of the heavy metal and the ammonia that generate and the glucose powder generation redox reaction be mixed in mud, impel the reduction of heavy metal ion valency or be directly reduced to simple substance; Fail the heavy metal of complete stability and carry out follow-up distillation along with mud, after mud distillation, remaining fixed carbon temperature is more than 450 DEG C, fixed carbon can carry out adsorbing the relative anaerobic environment of formation to the heavy metal in mud, and the total metal after absorption is reduced further under high temperature, anoxia condition.
Extraction commingled crude step described above is by modified and send in mud distiller through the mud of heavy metal process and carry out normal pressure, low-temperature distillation, when distilling room temp and reaching 300-350 DEG C retortable go out oil gas, oil gas obtains commingled crude through the cooling of oil gas cooling system.
The processing step of extraction volatile salt described above is: in dehydration modifying process, and in composition mud, the nitrogen protein of protein generates ammonia after proteolysis, amino acid deamination reaction; The amino acid added in ammonia and sludge press filtration process completes desamination reaction and iron trichloride in its ammonia generated and mud and aluminum chloride react and generate ammonium chloride; Realizing on the fixing basis of ammonia, add in mud account for its weight 1-3%'s and be greater than 300 object Paris whites, heat to mud temperature through machinery and reach more than 100 DEG C, the ammonium chloride in mud and Paris white reaction generate the mixing steam of volatile salt and water, obtain volatile salt crystal through cooling.
It is more than the implementation process of the treatment process of a kind of urban wastewater treatment firm mud of the embodiment of the present invention 3.
Embodiment 4
The embodiment of the present invention 4 a kind of is applicable to the treatment process of urban wastewater treatment firm mud under DEG C condition of outside air temperature >=20, that urban wastewater treatment firm mud is carried out harmless processing process by the processing step of dehydration modification, heavy metal process, mud after process carries out distillation extraction commingled crude, extracts the processing step of volatile salt, and the mud after its process meets pollutant catabolic gene standard in agricultural sludge.
Dehydration modification procedure described in it is:
1. activation modifier: in single treatment mud weight 0.07% ratio take the usage quantity of powdered modified dose, the ratio being 1:1.3 in the ratio of powdered modified dose of usage quantity and water again takes tap water and is placed in container and stirs with powdered modified dose, places 24 hours;
2. diluting modification agent: will the tap water that its weight ratio is 1:20 be added in step liquid state properties-correcting agent 1. and stir;
3. spraying modified dose: the properties-correcting agent spraying plant after step 2. being diluted divides the Sludge Surface to be modified being sprayed on for 3 times and being laid in modification ditch, sprinkling limit, limit is stirred to evenly;
4. buttress fermentation is played: step mud is 3. played buttress fermentation, stacking height is at 75cm; When playing buttress outside air temperature T >=20 DEG C condition under, mud temperature after 24 hours of fermenting can reach more than 40 DEG C; Ferment after 48 hours, in mud, protein complete hydrolysis is amino acid; When fermenting that after 48 hours, mud temperature can reach 40-60 DEG C, continue fermentation, the amino acid that proteolysis generates completes desamination reaction, and the iron trichloride added in ammonia and sludge press filtration process that reaction generates and aluminum chloride react and generate ammonium chloride, realizes fixing of ammonia;
5. ferment control: before modification in the fermentation time of 72-96 hour, carried out turning over buttress once every 8 hours; When modification zymosimeter after 96 hours, monitoring in an every 2 hours temperature, needs when temperature reaches more than 60 DEG C to carry out turning over buttress, is beneficial to heat radiation and sludge water content volatilization, namely continuing fermentation completes draining dehydration modification for 144 hours again, and modified moisture percentage in sewage sludge reduces most 25-30%.
Heavy metal described above is treated to: the calcium hydroxide adding glucose powder and 0.3% accounting for 0.003% of mud gross weight in the mud after modification mummification also fully mixes, heat under the condition of mud temperature >=100 DEG C at machinery, the ammonia that ammonium chloride in mud and calcium hydroxide reaction generate mixes with water vapour rapidly and heavy metal ion in mud is combined the complex compound forming ammonia, the complex compound of the heavy metal and the ammonia that generate and the glucose powder generation redox reaction be mixed in mud, impel the reduction of heavy metal ion valency or be directly reduced to simple substance; Fail the heavy metal of complete stability and carry out follow-up distillation along with mud, after mud distillation, remaining fixed carbon temperature is more than 450 DEG C, fixed carbon can carry out adsorbing the relative anaerobic environment of formation to the heavy metal in mud, and the total metal after absorption is reduced further under high temperature, anoxia condition.
Extraction commingled crude step described above is by modified and send in mud distiller through the mud of heavy metal process and carry out normal pressure, low-temperature distillation, distill out oil gas when distilling room temp and reaching 300-350 DEG C, oil gas obtains commingled crude through the cooling of oil gas cooling system.
The processing step of extraction volatile salt described above is: in dehydration modifying process, and in composition mud, the nitrogen protein of protein generates ammonia after proteolysis, amino acid deamination reaction; The amino acid added in ammonia and sludge press filtration process completes desamination reaction and iron trichloride in its ammonia generated and mud and aluminum chloride react and generate ammonium chloride, realizes the fixing of ammonia; Realizing on the fixing basis of ammonia, add in mud account for its weight 2% and be greater than 300 object Paris whites, heat to mud temperature through machinery and reach more than 100 DEG C, the ammonium chloride in mud and Paris white reaction generate the mixing steam of volatile salt and water, obtain volatile salt crystal through cooling.
It is more than the implementation process of the treatment process of a kind of urban wastewater treatment firm mud of the embodiment of the present invention 4.
The present invention's properties-correcting agent described above is that a kind of main component has: the solid particulate of the effective constituent proposed through fragmentation containing the high plant seed of fat and magnesiumcarbonate, organotrophy source, yeast flora and carboxypeptidase and proteolytic enzyme.Its purposes is for carrying out modification to mud in urban wastewater treatment firm sewage sludge harmlessness treating processes, and under the fermentation calorigenic action of properties-correcting agent, complicated chemical reaction occurs in mud inside; Simultaneously because fermentation calorigenic action impels mud to carry out dewatering to water ratio and reach about 25%, realize sludge drying object; Modified mud, by proposing the commodity of the higher economic worth of the tool such as commingled crude, volatile salt after distillation, really serves positive promoter action for realizing sewage sludge harmlessness process and realizing economic benefit.
The treatment process of urban wastewater treatment firm mud of the present invention in implementation process after testing, after process, heavy metal content substantially all reaches lower than pollutant catabolic gene standard value in national standard (GB4284-84) agricultural sludge and city-building industry standard (CJ-T309-2009) to the required value of heavy metal content in the agricultural shale of urban wastewater treatment firm sludge disposal in recrement, and environmental monitoring station of Yantai City gathers as following table to the sludge heavy-metal content detection value after the process of application the technology of the present invention:
Note: A level mud allows to use crop: vegetables, food crop, oil crops, fruit tree, fodder crop, fibre crops; B level mud allows to use crop: oil crops, fruit tree, fodder crop, fibre crops, forbids using vegetables and food crop.
Two samples in table are respectively the modified mud that do not carry out heavy metal process and remaining recrement (ash content) through heavy metal process and after distillation.In general, in mud, organic content can account for about 50% of total amount, and each heavy metal concentration after the process therefore provided in table in residual residue is equivalent to be doubled, and therefore actual numerical value all should reduce by 50% on former basis.From data, after heavy metal treatment systems process, the heavy metal content in mud obviously reduces, and meets the agricultural sludge heavy metal contaminants Con trolling index of national requirements.
Claims (6)
1.
oneplant the treatment process of urban wastewater treatment firm mud, it is characterized in that urban wastewater treatment firm mud to carry out harmless processing process by the processing step of dehydration modification, heavy metal process, the mud after process meets pollutant catabolic gene standard in the agricultural sludge of national requirements.
2. the treatment process of urban wastewater treatment firm mud according to claim 1, is provided with after it is characterized in that described heavy metal treatment process steps and mud after process is carried out to distillation extraction commingled crude, extracts the processing step of volatile salt.
3. the treatment process of urban wastewater treatment firm mud according to claim 1 and 2, is characterized in that described dehydration modification procedure is:
1. activation modifier: the usage quantity taking powdered modified dose in the ratio of the 0.05-0.1% of single treatment mud weight, the ratio being 1:1.1-1.3 in the ratio of powdered modified dose of usage quantity and water again takes tap water and is placed in container and stirs with powdered modified dose, places 18-24 hour;
2. diluting modification agent: add the tap water that its weight ratio is 1:15-20 and stir in step liquid state properties-correcting agent 1.;
3. spraying modified dose: the properties-correcting agent spraying plant after step 2. being diluted divides the Sludge Surface to be modified being sprayed on for 2-3 time and being laid in modification ditch, sprinkling limit, limit is stirred to evenly;
4. buttress fermentation is played: step mud is 3. played buttress fermentation, stacking height is at 75-80cm; Under the condition of outside air temperature T >=20 DEG C, mud temperature after 24 hours of fermenting can reach more than 40 DEG C; Ferment after 48 hours, in mud, protein complete hydrolysis is amino acid; Amino acid in mud completes desamination reaction and its ammonia generated first react with water and generates ammonium hydroxide, and the iron trichloride in ammonium hydroxide and mud and aluminum chloride react and generate ammonium chloride, realize fixing of ammonia;
5. ferment control: before modification in the fermentation time of 72-96 hour, turned over buttress once every 8 hours; When modification zymosimeter after 96 hours, every 2 hours monitoring primary sludge internal temperatures, need when temperature reaches more than 60 DEG C to carry out turning over buttress, be beneficial to heat radiation and sludge water content volatilization, within continuing fermentation 144-240 hour, namely complete dehydration modification again, modified moisture percentage in sewage sludge is reduced to 25-30%.
4. the treatment process of urban wastewater treatment firm mud according to claim 1, it is characterized in that described heavy metal process adds the calcium hydroxide of glucose powder and the 0.1-0.3% accounting for mud gross weight 0.001-0.003% in mud after modification mummification and fully mixes, heat under the condition of mud temperature >=100 DEG C at machinery, the ammonia that ammonium chloride in mud and calcium hydroxide reaction generate mixes with water vapour rapidly and heavy metal ion in mud is combined the complex compound forming ammonia, the complex compound of the heavy metal and the ammonia that generate and the glucose powder generation redox reaction be mixed in mud, heavy metal ion valency is impelled to reduce or be directly reduced to simple substance, fail the heavy metal of complete stability and carry out follow-up distillation along with mud, after mud distillation, remaining fixed carbon temperature is more than 450 DEG C, fixed carbon can carry out adsorbing the relative anaerobic environment of formation to the heavy metal in mud, and the heavy metal after absorption is reduced further under high temperature, anoxia condition.
5. the treatment process of urban wastewater treatment firm mud according to claim 2, it is characterized in that the processing step of described extraction commingled crude is: by modified and send in mud distiller through the mud of heavy metal process and carry out normal pressure, low-temperature distillation, distill out oil gas when distilling room temp and reaching 300-350 DEG C, oil gas obtains commingled crude through the cooling of oil gas cooling system.
6. the treatment process of urban wastewater treatment firm mud according to claim 2, is characterized in that the processing step of described extraction volatile salt is: the nitrogen of protein in dehydration modifying process composition mud is converted into ammonia after proteolysis, amino acid deamination reaction; The iron trichloride added in ammonia and sludge press filtration process and aluminum chloride react and generate ammonium chloride, realize ammonia fixing after, add in mud and account for its weight 1-3% and be greater than 300 object Paris whites, more than 100 DEG C are reached through heating to mud temperature, ammonium chloride in mud and Paris white reaction generate the mixing steam of volatile salt and water, obtain volatile salt crystal through cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510042419.8A CN104671621B (en) | 2015-01-28 | 2015-01-28 | A kind of processing method of urban wastewater treatment firm mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510042419.8A CN104671621B (en) | 2015-01-28 | 2015-01-28 | A kind of processing method of urban wastewater treatment firm mud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104671621A true CN104671621A (en) | 2015-06-03 |
| CN104671621B CN104671621B (en) | 2016-08-24 |
Family
ID=53307283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510042419.8A Active CN104671621B (en) | 2015-01-28 | 2015-01-28 | A kind of processing method of urban wastewater treatment firm mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104671621B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217908A (en) * | 2015-10-26 | 2016-01-06 | 徐明好 | A kind of by the method for the Lipid use in mud and specific equipment thereof |
| CN105347634A (en) * | 2015-10-26 | 2016-02-24 | 徐明好 | Designing method of sludge processing apparatus and apparatus thereof |
| CN105541018A (en) * | 2015-12-31 | 2016-05-04 | 朱辉 | Treatment method for removing heavy metals in industrial wastewater |
| CN105621793A (en) * | 2015-12-31 | 2016-06-01 | 朱辉 | Treatment system for removing heavy metal in industrial waste water |
| CN107721063A (en) * | 2016-01-14 | 2018-02-23 | 张作玮 | A kind of food and drink waste water oil removal treatment system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1442393A (en) * | 2002-03-05 | 2003-09-17 | 李波 | Method of producing composite organic fertilizer using city sludge |
| CN101081717A (en) * | 2007-04-10 | 2007-12-05 | 杨培根 | Method for handling heavy metal in sludge |
| KR100793164B1 (en) * | 2006-08-30 | 2008-01-10 | 재단법인 포항산업과학연구원 | Method for extracting heavy metals from sludge with organic acids |
| CN101891358A (en) * | 2010-07-06 | 2010-11-24 | 北京林业大学 | Method for removing heavy metals in excess sludge by bioleaching-similar Fenton oxidative coupling |
| TW201139298A (en) * | 2010-05-12 | 2011-11-16 | Ming-Yu Li | Process for stabilizing hazardous sludge containing heavy metal |
| CN102372407A (en) * | 2010-08-13 | 2012-03-14 | 袁登辉 | Biological drying method of municipal domestic sludge |
| CN102452776A (en) * | 2010-10-15 | 2012-05-16 | 中国石油化工股份有限公司 | Method for treating oil sludge |
-
2015
- 2015-01-28 CN CN201510042419.8A patent/CN104671621B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1442393A (en) * | 2002-03-05 | 2003-09-17 | 李波 | Method of producing composite organic fertilizer using city sludge |
| KR100793164B1 (en) * | 2006-08-30 | 2008-01-10 | 재단법인 포항산업과학연구원 | Method for extracting heavy metals from sludge with organic acids |
| CN101081717A (en) * | 2007-04-10 | 2007-12-05 | 杨培根 | Method for handling heavy metal in sludge |
| TW201139298A (en) * | 2010-05-12 | 2011-11-16 | Ming-Yu Li | Process for stabilizing hazardous sludge containing heavy metal |
| CN101891358A (en) * | 2010-07-06 | 2010-11-24 | 北京林业大学 | Method for removing heavy metals in excess sludge by bioleaching-similar Fenton oxidative coupling |
| CN102372407A (en) * | 2010-08-13 | 2012-03-14 | 袁登辉 | Biological drying method of municipal domestic sludge |
| CN102452776A (en) * | 2010-10-15 | 2012-05-16 | 中国石油化工股份有限公司 | Method for treating oil sludge |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217908A (en) * | 2015-10-26 | 2016-01-06 | 徐明好 | A kind of by the method for the Lipid use in mud and specific equipment thereof |
| CN105347634A (en) * | 2015-10-26 | 2016-02-24 | 徐明好 | Designing method of sludge processing apparatus and apparatus thereof |
| CN105347634B (en) * | 2015-10-26 | 2017-08-25 | 徐明好 | The design method and its device of a kind of sludge treatment equipment |
| CN105217908B (en) * | 2015-10-26 | 2017-09-26 | 徐明好 | The method and its special equipment of a kind of Lipid use by sludge |
| CN105541018A (en) * | 2015-12-31 | 2016-05-04 | 朱辉 | Treatment method for removing heavy metals in industrial wastewater |
| CN105621793A (en) * | 2015-12-31 | 2016-06-01 | 朱辉 | Treatment system for removing heavy metal in industrial waste water |
| CN107721063A (en) * | 2016-01-14 | 2018-02-23 | 张作玮 | A kind of food and drink waste water oil removal treatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104671621B (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Environmental implications of increasingly stringent sewage discharge standards in municipal wastewater treatment plants: case study of a cool area of China | |
| CN104671621A (en) | Treatment method for sludge in municipal sewage treatment plant | |
| CN102765850A (en) | Treatment process for 3,5,6-Trichloropyridin-2-ol sodium and chlorpyrifos production wastewater | |
| Sharma et al. | Wastewater treatment and sludge management strategies for environmental sustainability | |
| Kamaruddin et al. | Current status of Pulau Burung sanitary landfill leachate treatment, Penang Malaysia | |
| CN104370411A (en) | Method for removing heavy metals from industrial wastewater | |
| Huang et al. | Comprehensive competitiveness assessment of four typical municipal sludge treatment routes in China based on environmental and techno-economic analysis | |
| Ahmad et al. | Sustainability for wastewater treatment: bioelectricity generation and emission reduction | |
| CN109399881A (en) | A kind of method for sludge treatment | |
| CN103253840A (en) | Method for extracting natural acid-pickling corrosion inhibitor from surplus sludge and application thereof | |
| Elgarahy et al. | Biosolids management and utilizations: A review | |
| Li et al. | Sustainable use of rice husk powder and bamboo powder as sludge deep dewatering conditioners in pilot-scale application: Feasibility for incineration and potential application for land use | |
| Dashti et al. | Waste management of the palm oil industry: present status and future perspective | |
| Caicedo‐Ramirez et al. | Engineered addition of slag fines for the sequestration of phosphate and sulfide during mesophilic anaerobic digestion | |
| Mandpe et al. | A life cycle analysis-based comprehensive study on municipal solid waste management: a case study of Central India | |
| CN104649528B (en) | A kind of method of Heavy Metals in Sludge process | |
| Kuusik et al. | Assessment of landfill wastewater pollutants and efficiency of different treatment methods. | |
| Husain et al. | Microorganisms: An eco-friendly tools for the waste management and environmental safety | |
| CN102826734A (en) | Method for utilizing incineration fly ash as calcium-increasing passivation agent of town sludge | |
| Hultman et al. | Phosphorus recovery from sludge in Sweden–Possibilities to meet proposed goals in an efficient, sustainable and economical way | |
| Nandan et al. | Reuse of water treatment plant sludge for treatment of pollutants | |
| Urbanowska et al. | Analysis of the pre-treatment efficiency of digestate liquid fraction from a municipal waste biogas plant | |
| CN103936248A (en) | Method for mixing garbage leachate and municipal sludge for anaerobic digestion biological treatment | |
| Camelin et al. | The Bioenergy-Fertilizer Nexus: A Challenge Achievable from Municipal Wastewater | |
| CN212174753U (en) | Municipal sludge overall process treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |