CN104355524B - A kind for the treatment of process of deeply dehydrating sludge - Google Patents
A kind for the treatment of process of deeply dehydrating sludge Download PDFInfo
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- CN104355524B CN104355524B CN201410540377.6A CN201410540377A CN104355524B CN 104355524 B CN104355524 B CN 104355524B CN 201410540377 A CN201410540377 A CN 201410540377A CN 104355524 B CN104355524 B CN 104355524B
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- 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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- 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
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
-
- 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
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- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind of method to the efficient deep dehydration of sludge environment-friendly that urban wastewater treatment firm and sewage disposal produce, belong to dewatering technology of mud technical field.The present invention is at normal temperatures and pressures, first by adding waste sulfate, O in pending mud
3and FeCl
3carry out the pre-treatment of oxidation rupture of membranes, the oxidation realizing sludge bacteria micelle structure and mycetocyte film cracks, and makes a large amount of water of constitution in mud, suction Bao Shui and structure cell water become interstitial water; Again by adding Fe
2(SO
4)
3with PAM strengthening solidification, carry out coagulating kinetics, the hydrated product now with gelating property forms reticulated structure between mud granule, and the hydrated product of crystal class then fills cancellated hole, makes mud inside become fine and close; Finally by pressure filter dehydration, finally make moisture percentage in sewage sludge be reduced to less than 50%, realize the minimizing of sludge treatment, stabilization, innoxious.
Description
Technical field
The present invention relates to a kind for the treatment of process to the deeply dehydrating sludge that urban wastewater treatment firm and sewage disposal produce, belong to dewatering technology of mud technical field.
Background technology
The excess sludge process disposal that sewage work produces is a great problem of world today's environmental protection subject, and effectively attenuating moisture percentage in sewage sludge is a technical bottleneck in problem.At present, the mechanical dehydration mode that the sewage work of China generally adopts can by between near for moisture percentage in sewage sludge 75% ~ 80%, and regulation in " notices about strengthening the preventing and controlling of urban wastewater treatment firm sludge pollution " that general office of Chinese Ministry of Environmental Protection 2010 issues (ring is done [2010] No. 157): mud to be transported factory circle to store by sewage work for the purpose of (namely not processing disposal), must by below sludge dewatering to 50%.Water ratio excess sludge is also the secondary pollutant in sewage treatment process.On the one hand, containing a large amount of pathogenic bacterias, parasite, pathogenic microorganism in mud, and the heavy metal such as arsenic, copper, chromium, mercury is with dioxin, radionuclide etc. are difficult to the hazardous and noxious substances of degrading, because moisture percentage in sewage sludge is high, volume is large, bring difficulty to stacking and transport, if municipal sludge is dealt with improperly or not the norm handles, as arbitrarily thrown aside farmland abuse etc., serious potential threat can be caused by ecotope.On the other hand, excess sludge contains very high organotrophy matter and fuel value, and the Land_use change of mud and energy recycling are a kind of muds with bright prospects, and moisture percentage in sewage sludge height directly affects the regeneration cost of mud recycling.No matter be response national policy or resource regeneration, pursue low moisture percentage in sewage sludge all by imperative.Therefore deeply dehydrating sludge is paid attention to by various countries always deeply, and mud is problems that countries in the world are paid attention to jointly as effective utilization of renewable resource, represents the direction of human environment ecological benefits, Social benefit and economic benefit balanced development.
Mechanical dehydration only can make free water and the interstitial water be present between mud granule is removed; Bonding force between capillary water and mud granule is comparatively strong, need by higher mechanicals efforts and energy; In born of the same parents, the content of water is relevant with the ratio shared by microorganism cells in mud, and it is impracticable for making mechanically to remove this part water, and need adopt heat and the measure such as freezing.From the angle destroying sludge water content combining form, can utilize that compost, lime are modified, sludge chemical modification, the technique such as heat drying technology and osmosis.Anaerobism or mostly to adopt amendment to nurse one's health to reduce after moisture percentage in sewage sludge compost again to produce containing oxygen compost, there is floor space large, stink is comparatively large, the weak points such as the cycle of operation is long, and working cost is higher, and processing power is less.Lime modified dewatering process Lime-Injecting rate is 20% ~ 30%, and the weightening finish of Lime-Injecting amount large mud is comparatively large, and mud volume is larger, production cycle is longer, and mud cake and filtrate are alkalescence, and filtrate also needs adjust ph process, the requirement for anticorrosion of equipment is also higher, and working cost is higher.Mud dosing modification generally adopts medicament to nurse one's health mud, not to the change that mud carries out in essence, and the improvement of mechanical means that what the water ratio reducing mud relied on is.Mud dosing modification technology divides the settling property modification of sludge bacteria micelle and the modification of mud Zoogloea bacteria, for sludge settling property modification, the dehydration rate of mud can only drop to about 65%, and the total addition level of amendment accounts for mud butt ratio reaches more than 20%, in fact and the minimizing of unrealized mud mud increase-volume problem is comparatively serious.The dry technology of heat due to moisture percentage in sewage sludge higher, sludge calorific value can not maintain self sludge drying and run and need to increase the external source energy, and energy consumption is comparatively large, and running cost is very high.There is facility investment, running cost costly in osmosis dry method, the very high weak point of maintenance requirement of equipment.These methods are not there is water ratio can not reach requirement to there is running cost exactly too high or increase the shortcomings such as mud capacity and can not meet needed for reality.
Therefore, the difficult problem that current deeply dehydrating sludge faces is, existing amendment exists that cost is high, consumption is large, conditioning complex process, facility investment, running cost are too high, and unrealized sludge reduction, easily affect regeneration or the later use of mud, the shortcomings such as environmental benefit difference.
Summary of the invention
The object of the present invention is to provide a kind of efficient Deep dehydration treatment method of sludge environment-friendly that urban wastewater treatment firm and sewage disposal are produced.
The treatment process of a kind of deeply dehydrating sludge provided by the invention, is characterized in that: at normal temperatures and pressures, first by adding waste sulfate, O in pending mud
3and FeCl
3carry out the pre-treatment of oxidation rupture of membranes; Again by adding Fe
2(SO
4)
3with PAM(polyacrylamide) strengthening solidification, carry out coagulating kinetics; Finally by pressure filter dehydration, moisture percentage in sewage sludge is finally made to be reduced to less than 50%.
Further, the treatment process of deeply dehydrating sludge provided by the invention, comprises following concrete steps:
(1) mud is modified: in the oxidation rupture of membranes reaction tank be made up of two little Chi, first extracts pending mud in the first little Chi, adds waste sulfate and O
3, be the mud of 90 ~ 99.9% in water ratio, waste sulfate and O
3add-on be respectively wet mud, 1 ~ 10g/t of 10 ~ 100g/t and wet mud, after stirring reaction, mud mixed liquid is extracted in the second little Chi, adds FeCl
3, be the mud of 90 ~ 99.9% in water ratio, FeCl
3add-on be that 10 ~ 100g/t wets mud, then through stirring reaction, the oxidation realizing sludge bacteria micelle structure and mycetocyte film cracks, and makes a large amount of water of constitution in mud, inhale Bao Shui and structure cell water becomes interstitial water; Mud mixed liquid after the process of oxidation rupture of membranes reaction tank enters flocculation tank again, adds Fe
2(SO
4)
3and PAM, be the mud of 90 ~ 99.9% in water ratio, Fe
2(SO
4)
3be respectively wet mud, 1 ~ 4g/t of 10 ~ 100g/t with the add-on of PAM to wet mud, again through stirring reaction, the hydrated product now with gelating property forms reticulated structure between mud granule, namely the skeleton of mud is constituted, the hydrated product of crystal class then fills cancellated hole, make mud inside become fine and close, greatly improve water stability and the strength stability of mud;
(2) precipitate: good mud modified in step (1) is delivered in settling tank and leave standstill;
(3) dewater: bottom settling tank, extract thickened sludge out, introduce pressure filter and carry out filter-press dehydration, keep 20 ~ 40 minutes under the pressure of 1.2 ~ 1.6MPa, release blowing after pressurize completes, moisture percentage in sewage sludge is down to less than 50%.
In above-mentioned treatment process, the mass concentration of waste sulfate described in step (1) is that 98%, pH controls 6 ~ 6.5, described O
3, FeCl
3and Fe
2(SO
4)
3utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid to be prepared by reaction, the time of described stirring reaction is 10 ~ 20 minutes; Described in step (2), time of repose is 20 ~ 30 minutes; Described in step (3), pressure filter is plate and frame(type)filter press.
The present invention cracks the suction bag water of zoogloea organic floccus and zoogleic internal water is research direction, under normal temperature and pressure, high-energy state electronics is completed at s-g under oxygenant effect, s-l interface and excess sludge micellar structure bonding bond orbital symmetry shift, the oxidation realizing sludge bacteria micelle structure and mycetocyte film cracks, make a large amount of water of constitution in mud, suction Bao Shui and structure cell water become interstitial water, then solidification coagulated agent is added, improve the flocculence of mud, strengthen the proportion of flocs unit and water stability thereof and strength stability, by being uniformly mixed, leave standstill maintenance, dewatering rate is improved again by plate-and-frame filter press high pressure pressure rate, reach the object reducing moisture percentage in sewage sludge.
Applicant finds in a large amount of practical explorations, at FeCl
3, Fe
2(SO
4)
3, PAM and a small amount of waste sulfate acting in conjunction under, have significantly building performance, the high-efficiency dehydration of mud can be realized, conditioning technique is simple, quick, and consumption is few, and the moisture percentage in sewage sludge after dehydration can be down to less than 50%, pH value is between 6 ~ 6.5, ordorless, there is not increase-volume problem, can sludge dewatering treatment be widely used in.
Waste sulfate, O
3extracellular polymeric hydrolysis, microorganism cells in active sludge can be made to disintegrate as the agent of oxidation rupture of membranes, the oxidation that effectively can realize sludge bacteria micelle structure and mycetocyte film cracks, a large amount of water of constitution in mud, suction Bao Shui and structure cell water are discharged and becomes interstitial water, thus improve can degree of dehydration, good dehydrating effect can be reached within a short period of time.By destroying the cell tissue of cell walls based on protein and enzyme, acid RNA, carbohydrate, thus reach the effect of deodorizing, sterilization.
FeCl
3, Fe
2(SO
4)
3as flocculation agent, the hydrolysis of its iron ion forms colloid hydroxy polymer or precipitation of hydroxide, effects such as being adhered to by electrostatic, adsorb, net is caught, volume sweeps the floc particle that small-particle mud is formed with certain bearing capacity, PAM is as coagulant aids, mud can be made to form porous network shape skeleton, improve the compressibility of mud, strengthen the intensity of flco.
Medicament O used by the present invention
3, FeCl
3, Fe
2(SO
4)
3pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid can be utilized to be starting material, to be got by a series of chemical reaction preparation, greatly reduce treatment operating costs.
Medicament provided by the invention can make the Bound moisture of mud flco inside be released, and can change the surface charge of mud, promotes extracellular polymeric (EPS) hydrolysis, reduces the avidity to water.In addition, mud capillary water also can be induced to transform to mud gap free-water, reduce the viscosity of mud, thus realize conventional plate-and-frame filter press deep dehydration is carried out to mud.
Compared with prior art, the present invention has following features and advantage:
(1) sewage plant excess sludge deep dehydration under normal conditions, realize sludge deep process minimizing: the inventive method realizes the process of sludge of sewage treatment plant on-site deep, under normality condition by the excess sludge one step deep dehydration of water ratio 90 ~ 99.5% to water ratio less than 50%, reaching the national environmental standard of direct sanitary landfill, meeting the regulation in " notices about strengthening the preventing and controlling of urban wastewater treatment firm sludge pollution " that general office of Chinese Ministry of Environmental Protection 2010 issues (ring is done [2010] No. 157).
(2) realize specific resistance to filtration innoxious: application the inventive method is disposed of sewage factory's mud, virosome and bacterium colony are withered away, and heavy metal ion is solidified; The smelly degree of mud drops to less than 1 °; Reach mud safe handling and dispose environmental protection standard.
(3) sludge quality is stablized, and is convenient to the utilization of resources: oxidation dehydrated sludge chemical property changes, and particles coalesce increases, and stability improves, and does not return molten, not water-swelling.Indices all conforms with GB/T23485 ~ 2009, can make refuse landfill overburden soil shale; Moisture percentage in sewage sludge less than 50% after application the inventive method advanced treatment, do not add the additive that CaO etc. affects sludge calorific value, organic all 35 ~ 65% in domestic mud butt, corresponding fuel value is at 1800 ~ 3600 kilocalories, therefore dewatered sludge is as thermal power plant or cement mill, brick field replacement of fuel thing, is with a wide range of applications.
(4) economic benefit is obvious: because the inventive method raw materials is pressurized air and discarded iron filings, waste sulfate, discarded hydrochloric acid, therefore running cost is low, by the specific resistance to filtration expense of Yangjiang city (location, applicant test base) existing water ratio 80%, absolute dewatered sludge process disposal costs per ton is about 2300 yuan/ton; Adopt the inventive method processing costs to be about 550 yuan/ton, convert moisture 80% wet 110 yuan per ton of mud.
(5) invest little, instant effect: application the inventive method completes excess sludge deep dehydration, investment about 4,000,000 yuan of (middle-grade configurations are increased in original sewage work (by 50,000 ton per day sewage treatment capacity), containing for subsequent use), wherein press filtration is simple to operate, filter cloth long service life, cost is low, often overlaps 2000 yuan of (200m
2filtering system), be convenient to cleaning.Sludge deep treatment system only needs completion in three months from putting into operation to going into operation, instant effect.
(6) build novel environment friendly industry: take the present invention as core competitiveness, build discarded iron filings, waste sulfate, discarded HCl recovery base, build relevant device fabrication base, promote the environmental protection equipment production level of China, make novel environment friendly industry.
Accompanying drawing explanation
Fig. 1 is the processing technological flow figure of the deeply dehydrating sludge of the embodiment of the present invention.
Embodiment
Below by being example to Yangdong, Yangjiang city economic and technological development zone sewage disposal excess sludge, the present invention is described in further details.Following examples are only for setting forth the present invention, and protection scope of the present invention is not only confined to following examples.The those of ordinary skill of described technical field, according to above content disclosed by the invention and scope that each parameter is got, all can realize object of the present invention.
embodiment 1
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 30g(pH respectively and controls 6.5) and 2gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 50gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 50gFe
2(SO
4)
3solution, and add 2gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 30 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 40 minutes under the pressure of 1.2MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 49.8%.
embodiment 2
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 30g(pH respectively and controls 6.5) and 3gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 50gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 50gFe
2(SO
4)
3solution, and add 2gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 30 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 40 minutes under the pressure of 1.2MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 48.3%.
embodiment 3
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 40g(pH respectively and controls 6.5) and 4gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 70gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 70gFe
2(SO
4)
3solution, and add 2gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 25 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 30 minutes under the pressure of 1.3MPa, release blowing after pressurize completes.The dry mud cake that water ratio is 46.6% can be obtained.
embodiment 4
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 40g(pH respectively and controls 6.5) and 5gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 70gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 70gFe
2(SO
4)
3solution, and add 2gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 25 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 30 minutes under the pressure of 1.3MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 45.4%.
embodiment 5
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 50g(pH respectively and controls 6.5) and 5gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 70gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 70gFe
2(SO
4)
3solution, and add 2gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 25 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 40 minutes under the pressure of 1.4MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 45.4%.
embodiment 6
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 50g(pH respectively and controls 6.5) and 6gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 80gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 80gFe
2(SO
4)
3solution, and add 3gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 25 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 40 minutes under the pressure of 1.4MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 43.5%.
embodiment 7
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 60g(pH respectively and controls 6.5) and 7gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 80gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 80gFe
2(SO
4)
3solution, and add 3gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 25 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 40 minutes under the pressure of 1.5MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 41.2%.
embodiment 8
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 60g(pH respectively and controls 6.5) and 8gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 90gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 90gFe
2(SO
4)
3solution, and add 3gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 30 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce pressure filter and carry out filter-press dehydration, keep 35 minutes under the pressure of 1.5MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 39.6%.
embodiment 9
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 70g(pH respectively and controls 6.5) and 9gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 90gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 90gFe
2(SO
4)
3solution, and add 3gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 30 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 35 minutes under the pressure of 1.6MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 38.9%.
embodiment 10
Utilize pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid by reaction preparation O
3, FeCl
3and Fe
2(SO
4)
3.In the oxidation rupture of membranes reaction tank be made up of two little Chi, extracting 1t water ratio is in excess sludge to the first little Chi of 99.7%, adds 98% waste sulfate 70g(pH respectively and controls 6.5) and 10gO
3, stirring reaction 10 minutes.Mud mixed liquid enters another one little Chi, adds 100gFeCl
3solution, stirring reaction 10 minutes.Mud mixed liquid enters flocculation tank, adds 100gFe
2(SO
4)
3solution, and add 4gPAM, stirring reaction 20 minutes.Then enter settling tank and leave standstill 30 minutes, the precipitation concentration allowed.Bottom settling tank, extract thickened sludge out, introduce plate-and-frame filter press and carry out filter-press dehydration, keep 35 minutes under the pressure of 1.6MPa, release blowing after pressurize completes, can obtain the dry mud cake that water ratio is 36.8%.
Claims (6)
1. a treatment process for deeply dehydrating sludge, is characterized in that: at normal temperatures and pressures, first by adding waste sulfate, O in pending mud
3and FeCl
3carry out the pre-treatment of oxidation rupture of membranes; Again by adding Fe
2(SO
4)
3with PAM strengthening solidification, carry out coagulating kinetics; Finally by pressure filter dehydration, moisture percentage in sewage sludge is finally made to be reduced to less than 50%; Comprise following concrete steps:
(1) mud is modified: in the oxidation rupture of membranes reaction tank be made up of two little Chi, first extracts pending mud in the first little Chi, adds waste sulfate and O
3, be the mud of 90 ~ 99.9% in water ratio, waste sulfate and O
3add-on be respectively wet mud, 1 ~ 10g/t of 10 ~ 100g/t and wet mud, after stirring reaction, mud mixed liquid is extracted in the second little Chi, adds FeCl
3, be the mud of 90 ~ 99.9% in water ratio, FeCl
3add-on be that 10 ~ 100g/t wets mud, then through stirring reaction, the oxidation realizing sludge bacteria micelle structure and mycetocyte film cracks, and makes a large amount of water of constitution in mud, inhale Bao Shui and structure cell water becomes interstitial water; Mud mixed liquid after the process of oxidation rupture of membranes reaction tank enters flocculation tank again, adds Fe
2(SO
4)
3and PAM, be the mud of 90 ~ 99.9% in water ratio, Fe
2(SO
4)
3be respectively wet mud, 1 ~ 4g/t of 10 ~ 100g/t with the add-on of PAM to wet mud, again through stirring reaction, the hydrated product now with gelating property forms reticulated structure between mud granule, namely the skeleton of mud is constituted, the hydrated product of crystal class then fills cancellated hole, make mud inside become fine and close, greatly improve water stability and the strength stability of mud;
(2) precipitate: good mud modified in step (1) is delivered in settling tank and leave standstill;
(3) dewater: bottom settling tank, extract thickened sludge out, introduce pressure filter and carry out filter-press dehydration, keep 20 ~ 40 minutes under the pressure of 1.2 ~ 1.6MPa, release blowing after pressurize completes, moisture percentage in sewage sludge is down to less than 50%.
2. the treatment process of deeply dehydrating sludge according to claim 1, is characterized in that: the mass concentration of waste sulfate described in step (1) is that 98%, pH controls 6 ~ 6.5.
3. the treatment process of deeply dehydrating sludge according to claim 1, is characterized in that: O described in step (1)
3, FeCl
3and Fe
2(SO
4)
3pressurized air, discarded iron filings, waste sulfate, discarded hydrochloric acid is utilized to be prepared by reaction.
4. the treatment process of deeply dehydrating sludge according to claim 1, is characterized in that: the time of stirring reaction described in step (1) is 10 ~ 20 minutes.
5. the treatment process of deeply dehydrating sludge according to claim 1, is characterized in that: described in step (2), time of repose is 20 ~ 30 minutes.
6. the treatment process of deeply dehydrating sludge according to claim 1, is characterized in that: described in step (3), pressure filter is plate and frame(type)filter press.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410540377.6A CN104355524B (en) | 2014-10-14 | 2014-10-14 | A kind for the treatment of process of deeply dehydrating sludge |
| PCT/CN2015/085666 WO2016058437A1 (en) | 2014-10-14 | 2015-07-31 | Treatment method for deep dewatering of sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410540377.6A CN104355524B (en) | 2014-10-14 | 2014-10-14 | A kind for the treatment of process of deeply dehydrating sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104355524A CN104355524A (en) | 2015-02-18 |
| CN104355524B true CN104355524B (en) | 2016-04-06 |
Family
ID=52522865
Family Applications (1)
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| CN201410540377.6A Active CN104355524B (en) | 2014-10-14 | 2014-10-14 | A kind for the treatment of process of deeply dehydrating sludge |
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| CN104355524B (en) * | 2014-10-14 | 2016-04-06 | 广东金泥华牛科技有限公司 | A kind for the treatment of process of deeply dehydrating sludge |
| CN104761112A (en) * | 2015-04-23 | 2015-07-08 | 昆山美淼环保科技有限公司 | Sludge deep dehydration treatment method |
| CN105254153A (en) * | 2015-11-23 | 2016-01-20 | 湖南大学 | Potassium permanganate lysis/ferric chloride flocculation/biological carbon skeleton combined conditioning method for municipal sludge |
| CN105601061B (en) * | 2015-12-16 | 2018-04-03 | 余元华 | A kind of not anti-molten processing method and processing device of the innoxious decrement of excess sludge broken wall |
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| CN111333227A (en) * | 2020-03-24 | 2020-06-26 | 广州华景建设有限公司 | Municipal sewage treatment process |
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| CN114249520A (en) * | 2020-09-22 | 2022-03-29 | 湘潭市污水处理有限责任公司 | Advanced dehydration treatment agent and treatment method for manganese-containing sludge |
| CN114920341B (en) * | 2021-09-16 | 2024-01-12 | 华能国际电力江苏能源开发有限公司南通电厂 | Application and method for recycling desulfurization wastewater chlorine removal precipitate |
| CN113955918A (en) * | 2021-10-12 | 2022-01-21 | 中国水利水电第七工程局有限公司 | Chemical flocculation-vacuum preloading-solidification integrated sludge treatment device and method |
| CN114163092A (en) * | 2021-12-08 | 2022-03-11 | 深圳大学 | Sludge dewatering system and sludge dewatering method |
| CN114506997B (en) * | 2022-01-27 | 2022-12-09 | 广州诺冠环保科技有限公司 | Preparation method of granular sludge for deep dehydration of sludge of high-pressure diaphragm plate-and-frame filter press |
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| CN116103070B (en) * | 2022-09-13 | 2024-04-12 | 中南大学 | Recycling treatment method for preparing high-heat-value fuel by using dehydrated organic sludge |
| CN117510033B (en) * | 2024-01-08 | 2024-04-12 | 松谷科技(福建)有限公司 | Municipal sludge deep dehydration drying process and equipment |
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| CN102408178A (en) * | 2010-09-21 | 2012-04-11 | 上海市政工程设计研究总院 | Deep dewatering method for sludge |
| CN103058480A (en) * | 2012-12-21 | 2013-04-24 | 湖南清和环保技术有限公司 | Device and method for sludge treatment |
| CN103708704A (en) * | 2013-07-30 | 2014-04-09 | 广东省环境科学研究院 | Pre-treatment method for deep sludge dewatering |
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