CN101704619A - Process for treating and recycling city sewage water - Google Patents
Process for treating and recycling city sewage water Download PDFInfo
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- CN101704619A CN101704619A CN200910250144A CN200910250144A CN101704619A CN 101704619 A CN101704619 A CN 101704619A CN 200910250144 A CN200910250144 A CN 200910250144A CN 200910250144 A CN200910250144 A CN 200910250144A CN 101704619 A CN101704619 A CN 101704619A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
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Abstract
The invention discloses a process for treating and recycling city sewage water, belonging to the technical field of waste water treatment. City sewage water passes through a grating, is uplifted to a sand basin by a sewage pump and then enters an adsorption pool, and simultaneously is mixed with sludge from a regeneration pool; the mixed solution enters a sedimentation pool for sludge-water separation; the effluent water from the sedimentation pool is mixed with disinfectors, then passes through a disinfection contact pool and is reused as agricultural irrigation water; most part of sludge discharged from the sedimentation pool enters the regeneration pool for sludge regeneration and then enters the adsorption pool after the adsorption activity of the sludge is recovered; and the other part of the sludge is subjected to concentrated treatment as remaining sludge in a concentrated tank, is placed into a sludge drying field to be dewatered and dried, and then transported outside to be used as farmyard manure. The process for treating city sewage waste has two stages, namely, biological adsorption and regeneration; the effluent water can meet the requirements of standards for irrigation water quality; and the process for treating and recycling city sewage water has relatively simple treatment process, small occupied area, low capital construction investment and running cost, and convenient control and management.
Description
Technical field
The present invention relates to technical field of sewage, particularly a kind ofly be applicable to the municipal sewage treatment of arid, semiarid zone and utilize technology again.
Background technology
China is the country of a water resources poorness, and water resources ownership per capita only is world occupancy volume per person's 1/4th, and spatial and temporal distributions is extremely inhomogeneous.China western part, especially the Northwest belong to the severe drought water-deficient area, and drought and water shortage has become its main natural disaster.
Along with Chinese society and rapid development of economy, the increasing of development of the West Regions paces, industry, agricultural and people's lives etc. are increasing to the demand of water resources, shortage of water resources seriously hampers the The development in society and economy of the Northwest, having become the serious restraining factors of the Northwest's urban sustainable development, is to cause a local poor principal element.
Meanwhile, because sewage disposal expense costliness, the Northwest does not have sewage treatment facility in overwhelming majority cities and towns, a large amount of municipal effluents is dealt carefully with direct row to water body without any, cause the water body severe contamination, make originally very limited water resource suffer destruction again, available water resources is further reduced, water resources imbalance between supply and demand aggravation.
The essential measure that solves the municipal effluent pollution is that construction is the sewage work of the cities of secondary grade of main process with the biological treatment, yet build sewage work of the cities of secondary grade and need a large amount of investments and the working cost of great number, this is for the vast the Northwest of economics of underdevelopment, because local government has quite modest financial resources, it is very difficult implementing this behave.The important difficult problem that water pollution control runs into just sewage work's construction and the operation fund shortage, cause the sewage work in a collection of planning to delay to start, that has built up can not normally move, the environmental goals of expection can't realize.Therefore for resolving the control that water pollutes, the level and the local characteristics of self Economic development all should be considered in various places, take different measures.
Resolve the Northwest's shortage of water resources and water pollution problems, the best way is to adopt the sewage recycling utilization.Because the Northwest's water environment capacity is very low, many local shortage of water resources and water pollution problemss are very serious, if adopt traditional sewage water treatment method, need a large amount of investment and working cost, economic undeveloped enough funds that is difficult to raise are carried out water pollution control.Adopt sewage recycling, after sewage is handled simply by economy, irrigate as farming, woods, in the quite a long time, be to solve a kind of the best of these two problems of the Northwest and the method that gears to actual circumstances, be to accelerate the drought and water shortage area people to shake off poverty and set out on the road to prosperity, guarantee the major measure of the Northwest social economy sustainable development.So the treatment process that seek a kind of efficient, low consumption, is fit to NORTHWEST CHINA area sewage quality has very significant meaning.
Summary of the invention
Cause water resource pollution in order to solve the direct discharging of municipal effluent, and the problem that improves the sewage utilization ratio, the present invention proposes a kind of municipal sewage treatment and utilize technology again, behind the next sewage process grid removal floating matter of urban discharging pipeline, rise to settling pit with sump pump and remove thick inorganicss such as sand grains, after enter into adsorption tank, simultaneously with recovered active mud from regenerated reactor and mixed mutually, produce absorption reaction, mixed solution enters settling tank and carries out mud-water separation.The water outlet of settling tank is with after sterilizing agent mixes, again behind antisepsis contact tank reuse as pesticide irrigation-ing water; The mud major part of discharging from settling tank enters regenerated reactor, carries out mud regeneration, recovers to enter adsorption tank behind its adsorption activity, and another part mud after the concentration basin concentration, is squeezed into sludge drying bed as excess sludge, transports outward behind dehydration and drying.
Further, be provided with micro-hole aerator in the bottom of adsorption tank, the pressurized air from the air blast machine room is sent here enters in the sewage by the form of the micro-hole aerator in the adsorption tank with micro-bubble, stirs and provides biochemical reaction required dissolved oxygen.
Further, be provided with micro-hole aerator in the bottom of regenerated reactor, the pressurized air from the air blast machine room is sent here enters in the mud by the form of the micro-hole aerator in the regenerated reactor with micro-bubble, stirs and provides biochemical reaction required dissolved oxygen.
Further, sewage behind antisepsis contact tank except reuse directly as pesticide irrigation-ing water, also can enter the water storage cellar for storing things, because agricultural irrigation water has very strong seasonality and discontinuity. in order to make full use of the regenerated water source after the processing, adopt the sewage after the sewage storing technology will be handled to store in non-agricultural filling season and water low peak period, the water use peak phase extracts it again, further naturally after the removal pollutants in sewage again reuse can alleviate the pressure of water source anxiety greatly for the city of drought and water shortage as pesticide irrigation-ing water.
Further, the mud outward transport behind dehydration and drying can be used as farm manure.
Further, adopt dioxide peroxide as sterilizing agent.
Technical scheme provided by the invention compared with prior art has the following advantages:
1. do not establish primary sedimentation pond, the microorganism in the urban drainage pipe network can add in the reactor endlessly, utilizes the bacterium in the sewage constantly reactor to be inoculated;
2. the absorption of mud is carried out in different reactors with these two processes of regenerating, and can obtain active stronger active sludge by regeneration, thereby can obtain better water outlet effect under the certain condition of total pond appearance;
3. load is high, and it is 2～8kgCOD/kgMLSS.d that COD removes load, and mud is short age, and mud age is 0.3～0.5 day, and nutritive substance is abundant, and active sludge has very high energy level;
4. sludge index SVI value is between 20～90mg/L, and mud has good settling property, and active sludge mainly is made up of bacterial flora, and the slower thread fungus of rate of propagation is difficult to stay at Installed System Memory, does not produce sludge bulking;
5. this technology has higher removal efficient to the CODCr in the municipal effluent, BOD5, SS (VSS) etc.; Nitrogen, phosphorus are had certain removal effect, and the every index of water outlet all can satisfy the requirement of " agricultural irrigation water quality standard ";
6. this technology is lower to the clearance of nitrogen, phosphorus, most nitrogen, phosphorus nutrition composition have been kept in the water outlet, this is that the treating processes of purpose is and favourable for water outlet with the farming filling, compositions such as the nitrogen that contains in the sewage, phosphorus are the needed nutritive ingredients of plant-growth, guaranteeing under the effluent quality prerequisite up to standard, the ratio of nitrogen and phosphorus is high more in the sewage, helps the growth of crop;
7. this technology is as the treatment process of sewage recycling, and treatment scheme is simple relatively, and floor space is less, and initial cost and working cost are lower, are convenient to control and management.
Description of drawings
Fig. 1 is the sewage disposal functional-block diagram of the embodiment of the invention;
Fig. 2 is the sewage treatment process figure of the embodiment of the invention.
Reference numeral:
The 1-grid, 2-sump pump, 3-settling pit, 4-adsorption tank, 5-settling tank, 6-chlorination house, 7-antisepsis contact tank, 8-air blast machine room, 9-regenerated reactor, 10-concentration basin, 11-sludge drying bed.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
The municipal sewage treatment that the embodiment of the invention provides and utilize technology to comprise two stages again: the fs is called biological absorption, analyze flocculation kinetics as can be known, municipal effluent and biological sludge enter adsorption tank, microbial floc matter is through the flocculation absorption reaction, and a large amount of pollution substances are flocculated absorption and form the mud flco, because the hydraulic detention time that adopts is very short, biochemical reaction does not take place in organism substantially that be adsorbed, mixed solution enters settling tank, after mud-water separation, and the water outlet discharging; Subordinate phase is called activating and regenerating, for recovering the biological adsorption activity of settling tank mud, precipitating sludge is back to regenerated reactor, carry out short period of time aeration activation, because the hydraulic detention time of mud is longer, carry out biochemical reaction, microorganism is in the height ratio propagation phase, the organic pollutant that is adsorbed, dissolved under the extracellular enzyme effect of bacterium, and further removed by biological degradation, make active sludge recover active, improved the settling property of mud, entered adsorption tank again and carry out absorption reaction, thereby made the entire treatment system stable operation.Elaborate the technical scheme that the embodiment of the invention provides below.
Referring to Fig. 1 and Fig. 2, municipal sewage treatment that the embodiment of the invention provides and the technical process that utilizes again are as follows: after removing floating matter from the next sewage of urban discharging pipeline through grid 1, rise to settling pit 3 with sump pump 2 and remove thick inorganicss such as sand grains, after enter into adsorption tank 4, simultaneously with recovered active mud from regenerated reactor 9 and mixed mutually, produce absorption reaction, mixed solution enters settling tank 5 and carries out mud-water separation; The water outlet of settling tank 5 is with after sterilizing agent from chlorination house 6 mixes, again behind antisepsis contact tank 7 reuse as pesticide irrigation-ing water; The mud major part of discharging from settling tank 5 enters regenerated reactor 9, carries out mud regeneration, recovers to enter adsorption tank 4 behind its adsorption activity, and another part mud after concentration basin 10 concentration, is squeezed into sludge drying bed 11 as excess sludge, transports outward behind dehydration and drying.Mud outward transport behind dehydration and drying is as farm manure.In the present embodiment, grid 1 and sump pump 2 all are placed in the sewage pump plant.
In the present embodiment, be provided with micro-hole aerator in the bottom of adsorption tank 4, the pressurized air from air blast machine room 8 is sent here enters in the sewage by the form of the micro-hole aerator in the adsorption tank 4 with micro-bubble, stirs and provides biochemical reaction required dissolved oxygen.In adsorption tank 4, sludge loading is higher, and it is 2～8kgCOD/kgMLSS.d that COD removes load, and hydraulic detention time is very short, about 15～20min, thus reduced the volume of required adsorption tank 4.
In the present embodiment, also be provided with micro-hole aerator in the bottom of regenerated reactor 9, the pressurized air from air blast machine room 8 is sent here enters in the mud by the form of the micro-hole aerator in the regenerated reactor 9 with micro-bubble, stirs and provides biochemical reaction required dissolved oxygen.
In actual applications, can adopt dioxide peroxide as sterilizing agent, mix with the water outlet of settling tank 5, enter antisepsis contact tank 7, sewage behind antisepsis contact tank 7 except reuse directly as pesticide irrigation-ing water, also can enter the water storage cellar for storing things, because agricultural irrigation water has very strong seasonality and discontinuity.In order to make full use of the regenerated water source after the processing, adopt the sewage after the sewage storing technology will be handled to store in non-agricultural filling season and water low peak period, the water use peak phase extracts it again, further naturally after the removal pollutants in sewage again reuse as pesticide irrigation-ing water.
The municipal sewage treatment that the embodiment of the invention provides and utilize technology again, this technology are removed pollution substance and are comprised following four kinds of effects: the throwing out of mud that takes place in (1) adsorption tank and microbial floc confrontation subparticle pollutent; (2) in the adsorption tank biological sludge to the adsorption of dissolubility pollutant; The natural subsidence effect of the macrobead suspended solids that (3) takes place in the settling tank; (4) in the regenerated reactor microorganism to the biological metabolism effect of adsorbed solvability organic pollutant.Wherein, effective to municipal effluent is the biological metabolism effect of throwing out, adsorption and the regenerated reactor of adsorption tank.But in regenerated reactor, biological metabolism mainly is in order to recover the activity of mud, and biological metabolism time and biological metabolism amount are all less, and be less to the removal effect of pollutent.Thereby, the flocculation adsorption that this art breading pollutent mainly is a biological sludge.
In order to set forth the technical scheme of the embodiment of the invention in further detail, be that example is illustrated to solve the field irrigation lack of water below:
Carried out this municipal sewage treatment in the Qingyang City, Gansu Province and utilized the experimental study of technology again, the scene has handles water yield 500m
3One of the pilot scale sewage work of/d, the test about 6hm in farmland
2, supporting field irrigation greenhouse and various research observation facility.Test water inlet B/C value is about 0.5, be suitable for biochemical treatment, the test technology parameter is: adsorption tank hydraulic detention time 15～20min, the settling tank sedimentation time is 1h, about regenerated reactor dissolved oxygen concentration 2mg/L, and regenerated reactor sludge concentration 2000～7000mg/L, it is 2～8kgCOD/kgMLSS.d that adsorption tank COD removes load, about mud 0.3～0.5d in age, return sludge ratio 30～50%, aeration rate are 60m
3Air/m
3Sewage h, pH value about 7.5, the test temperature scope is 18～26 ℃.Test periods 5 wheat harvesting period, Analysis Results of Water Quality is as follows, and table 1 is the removal effect of principal pollutant in into water, the water outlet; Table 2 is the concentration of heavy metal ion and pathogenic micro-organism in into water, the water outlet.
Table 1
Table 2
Technical scheme provided by the invention compared with prior art has the following advantages:
1. do not establish primary sedimentation pond, the microorganism in the urban drainage pipe network can add in the reactor endlessly, utilizes the bacterium in the sewage constantly reactor to be inoculated;
2. the absorption of mud is carried out in different reactors with these two processes of regenerating, and can obtain active stronger active sludge by regeneration, thereby can obtain better water outlet effect under the certain condition of total pond appearance;
3. load is high, and it is 2～8kgCOD/kgMLSS.d that COD removes load, and mud is short age, and mud age is 0.3～0.5 day, and nutritive substance is abundant, and active sludge has very high energy level;
4. sludge index SVI value is between 20～90mg/L, and mud has good settling property, and active sludge mainly is made up of bacterial flora, and the slower thread fungus of rate of propagation is difficult to stay at Installed System Memory, does not produce sludge bulking;
5. this technology has higher removal efficient to the CODCr in the municipal effluent, BOD5, SS (VSS) etc.; Nitrogen, phosphorus are had certain removal effect, and the every index of water outlet all can satisfy the requirement of " agricultural irrigation water quality standard ";
6. this technology is lower to the clearance of nitrogen, phosphorus, most nitrogen, phosphorus nutrition composition have been kept in the water outlet, this is that the treating processes of purpose is and favourable for water outlet with the farming filling, compositions such as the nitrogen that contains in the sewage, phosphorus are the needed nutritive ingredients of plant-growth, guaranteeing under the effluent quality prerequisite up to standard, the ratio of nitrogen and phosphorus is high more in the sewage, helps the growth of crop;
7. this technology is as the treatment process of sewage recycling, and treatment scheme is simple relatively, and floor space is less, and initial cost and working cost are lower, are convenient to control and management.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a municipal sewage treatment and utilize technology again is characterized in that, municipal effluent is through grid, enters into adsorption tank after rising to settling pit with sump pump, mixes mutually with mud from regenerated reactor simultaneously, and mixed solution enters settling tank and carries out mud-water separation; The water outlet of settling tank with after sterilizing agent mixes again behind antisepsis contact tank reuse as pesticide irrigation-ing water; The mud major part of discharging from settling tank enters regenerated reactor, carries out mud regeneration, recovers to enter adsorption tank behind its adsorption activity, and another part mud after the concentration basin concentration, is squeezed into sludge drying bed as excess sludge, transports outward behind dehydration and drying.
2. municipal sewage treatment according to claim 1 and utilize technology again is characterized in that, is provided with micro-hole aerator in the bottom of adsorption tank.
3. municipal sewage treatment according to claim 1 and utilize technology again, it is characterized in that, pressurized air from the air blast machine room is sent here enters in the sewage by the form of the micro-hole aerator in the adsorption tank with micro-bubble, stirs and provides biochemical reaction required dissolved oxygen.
4. municipal sewage treatment according to claim 1 and utilize technology again is characterized in that, is provided with micro-hole aerator in the bottom of regenerated reactor.
5. municipal sewage treatment according to claim 1 and utilize technology again, it is characterized in that, pressurized air from the air blast machine room is sent here enters in the mud by the form of the micro-hole aerator in the regenerated reactor with micro-bubble, stirs and provides biochemical reaction required dissolved oxygen.
6. municipal sewage treatment according to claim 1 and utilize technology again, it is characterized in that, sewage behind antisepsis contact tank except reuse directly as pesticide irrigation-ing water, also enter water storage cellar for storing things, further naturally after the removal pollutants in sewage again reuse as pesticide irrigation-ing water.
7. municipal sewage treatment according to claim 1 and utilize technology again is characterized in that, the mud outward transport behind dehydration and drying can be used as farm manure.
8. municipal sewage treatment according to claim 1 and utilize technology again is characterized in that, adopts dioxide peroxide as sterilizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910250144A CN101704619A (en) | 2009-11-30 | 2009-11-30 | Process for treating and recycling city sewage water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910250144A CN101704619A (en) | 2009-11-30 | 2009-11-30 | Process for treating and recycling city sewage water |
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| CN101704619A true CN101704619A (en) | 2010-05-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776522A (en) * | 2016-04-29 | 2016-07-20 | 中国科学院生态环境研究中心 | Sewage treatment system and method for strengthening fast transfer of organic matters |
| CN111665814A (en) * | 2020-07-10 | 2020-09-15 | 宁夏大学 | Life reclaimed water control system |
| CN111704328A (en) * | 2020-07-29 | 2020-09-25 | 张龙 | Sewage treatment method based on sludge-recyclable desliming machine |
| CN113415922A (en) * | 2021-07-15 | 2021-09-21 | 武汉永清环保科技工程有限公司 | Sewage treatment and recycling process for lake fixed sewage treatment plant |
-
2009
- 2009-11-30 CN CN200910250144A patent/CN101704619A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776522A (en) * | 2016-04-29 | 2016-07-20 | 中国科学院生态环境研究中心 | Sewage treatment system and method for strengthening fast transfer of organic matters |
| CN105776522B (en) * | 2016-04-29 | 2018-10-30 | 中国科学院生态环境研究中心 | Strengthen the sewage disposal system and method for organic matter fast transfer |
| CN111665814A (en) * | 2020-07-10 | 2020-09-15 | 宁夏大学 | Life reclaimed water control system |
| CN111704328A (en) * | 2020-07-29 | 2020-09-25 | 张龙 | Sewage treatment method based on sludge-recyclable desliming machine |
| CN111704328B (en) * | 2020-07-29 | 2021-07-27 | 陕西标远环保科技有限公司 | Sewage treatment method based on sludge-recyclable desliming machine |
| CN113415922A (en) * | 2021-07-15 | 2021-09-21 | 武汉永清环保科技工程有限公司 | Sewage treatment and recycling process for lake fixed sewage treatment plant |
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Application publication date: 20100512 |