CN102826723B - Treatment method for urban sanitary sewage - Google Patents
Treatment method for urban sanitary sewage Download PDFInfo
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- CN102826723B CN102826723B CN201210349369.4A CN201210349369A CN102826723B CN 102826723 B CN102826723 B CN 102826723B CN 201210349369 A CN201210349369 A CN 201210349369A CN 102826723 B CN102826723 B CN 102826723B
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Abstract
The invention discloses a treatment method for urban sanitary sewage. The invention is characterized by comprising the following steps of: (1) anaerobic treatment: enabling sewage to be treated to flow into an anaerobic bioreactor, wherein the bioreactor adopts a biofilm process, and the organic matters in the sewage are initially decomposed and removed under the function of anaerobe; (2) phosphorous removal treatment: enabling the sewage to flow out of an SBR (sequencing batch reactor) pond to enter into a phosphorous removal pond, and putting a phosphorus removal agent into the phosphorous removal pond, so that flocculating constituent and the sediment can be formed by the phosphorus removal agent and organic phosphorus compounds in the sewage; (3) aerobic treatment: enabling the sewage to flow out of the phosphorous removal pond to enter into an aerobiotic bioreactor, wherein the bioreactor adopts the biofilm process, the microbial metabolic rate can be accelerated due to the biofilm process, and organic matters in the sewage can be further decompressed; and (4) sediment drainage stage: discharging the sewage into a sedimentation tank through the aerobic treatment, wherein the sedimentation time is 1.5-2h, the surface load is 1.0-2.0m<3>/m<2>.h, and the liquid supernatant can accord with the national primary emission standard after the sedimentation is stopped.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, relate to especially a kind for the treatment of process of urban life class sewage.
Background technology
Body eutrophication has become more and more serious global environmental problem, and it is mainly because the excess discharge of the nutritive substances such as nitrogen, phosphorus in environment causes.The one-level A standard code ammonia nitrogen of China's current standards " urban wastewater treatment firm pollutant emission standard " (GB 18918-2002) should not surpass 5mg/L, total nitrogen should not surpass 15mg/L, total phosphorus should not surpass 0.5mg/L, the major river valley that water pollution is administered, requires the interior newly-built town sewage treatment facility of its basin perimeter all should carry out the one-level A standard of aforesaid standards.Therefore, existing take remove the two stage biological treatment process that organism is main purpose and be no longer applicable to the urban wastewater treatment firm of planning to build in a large number in basin, on market in the urgent need to applicable sewage denitrification and dephosphorization technology.
Existing technique mainly contains primary reinforcement treatment technology and biological treatment etc., and denitrogenation dephosphorizing is qualified discharge simultaneously, and consume energy high, take up an area large.Therefore, a large amount of discharges of the deficiency of existing Small Town Wastewater treatment technology, nitrogen phosphorus are to cause one of direct inducement that domestic current water eutrophication is serious.
Summary of the invention
Treatment process to urban life class sewage of the present invention has following step:
1, anaerobic treatment, treatment sewage flows into anaerobic biological reactor, and this reactor adopts biomembrance process, and the organism in sewage is tentatively decomposed and is removed under anerobe effect, and the time that sewage stops in anaerobic reactor is 5～6 hours;
2, dephosphorization is processed, and sewage enters dephosphorization pond flowing out in SBR pond, in dephosphorization pond, throws in dephosphorization agent, the agitator low rate mixing in dephosphorization pond then, and rotating speed is 20～30rmin
-1, the organo phosphorous compounds in dephosphorization agent and sewage forms flocs unit and forms precipitation, and sewage is 0.5～1.5 hour in the dephosphorization pond residence time, and chemical sludge is discharged by chemical sludge mud discharging mouth, and the consumption of dephosphorization agent is 1kg dephosphorization agent: 1 ton of sewage;
3, aerobic treatment: sewage enters aerobe reactor after flowing out from dephosphorization pond, this reactor adopts biomembrance process, and improve microbial metabolism speed by biomembrance process, and further decompose the organism in sewage, the time that sewage stops in aerobic reactor is 8～10 hours;
4, in the sedimentation and drawing stage: sewage enters settling tank after aerobic treatment, sedimentation time is 1.5～2 hours, and surface load is 1.0～2.0m
3/ m
2h, precipitation finishes rear supernatant liquor and can meet national I level emission standard.
Wherein, the biofilm carrier using in bio-reactor described in step 1 and 3 can adopt the carrier that utilizes residue that cane sugar manufacture produces to prepare, the concrete preparation method of this carrier is as follows: the residue that cane sugar manufacture is produced cleans, subsequently residue is placed in to massfraction and is 18%～20% sodium hydroxide solution, soak 5～7h; Residue after alkalinisation treatment is carried out carrying out crosslinking reaction with excessive dicumyl peroxide after processed; Solid product and Trimethylamine 99 alcoholic solution that crosslinking reaction is generated carry out quaternary ammonium reaction, obtain solid product; After being cleaned and be dried, solid product becomes carrier of the present invention.
Wherein, dephosphorization agent described in step 2 is prepared in accordance with the following methods, take bauxitic clay as raw material, 80 object bauxitic clays are placed in to 10% potassium permanganate solution, the ratio of bauxitic clay and potassium permanganate is 1kg bauxitic clay: 1000ml potassium permanganate solution, bauxitic clay fully mixes formation suspension in potassium permanganate solution, then in suspension, add polyacrylamide and water glass and stir, the amount that adds polyacrylamide is 10g polyacrylamide: 1000ml suspension, the amount that adds water glass is 5g water glass: 1000ml suspension.
Treatment process of the present invention has been used and take the biofilm carrier that sugarcane residue prepared as raw material, has reduced processing cost, and by biofilm carrier, has improved the processing efficiency of bio-reactor.Use in addition and take the dephosphorization agent that bauxitic clay is basic material, reduced processing cost, also there is good phosphor-removing effect simultaneously.The nitrogen phosphorus in sewage can be effectively removed in processing by these four steps, realizes the qualified discharge of sewage.
Embodiment
Adopt potassium dichromate process to measure COD; Adopt potassium persulfate oxidation---determined by ultraviolet spectrophotometry total nitrogen; Adopt nessler reagent spectrphotometric method for measuring ammonia nitrogen, adopt molybdenum-antimony anti-spectrophotometric method to measure total phosphorus.
Embodiment 1
The COD for the treatment of sewage is 280mg/L, and total nitrogen is 144mg/L, and ammonia nitrogen is 45mg/L, and total phosphorus is 21mg/L.
Sewage is done to following processing
1, anaerobic treatment, treatment sewage flows into anaerobic biological reactor, this reactor adopts biomembrance process, carrier prepared by the residue that biofilm carrier employing utilizes cane sugar manufacture to produce, the preparation method of this carrier sees above, organism in sewage is tentatively decomposed and is removed under anerobe effect, and the time that sewage stops in anaerobic reactor is 5 hours;
2, dephosphorization is processed, and sewage enters dephosphorization pond flowing out in SBR pond, in dephosphorization pond, throws in dephosphorization agent, dephosphorization agent adopts take bauxitic clay as basic dephosphorization agent, the preparation method of this dephosphorization agent sees above, the agitator low rate mixing in dephosphorization pond then, and rotating speed is 25rmin
-1, the organo phosphorous compounds in dephosphorization agent and sewage forms flocs unit and forms precipitation, and sewage is 1 hour in the dephosphorization pond residence time, and chemical sludge is discharged by chemical sludge mud discharging mouth, and the consumption of dephosphorization agent is 1kg dephosphorization agent: 1 ton of sewage;
3, aerobic treatment: sewage enters aerobe reactor after flowing out from dephosphorization pond, this reactor adopts biomembrance process, carrier prepared by the residue that biofilm carrier employing utilizes cane sugar manufacture to produce, the preparation method of this carrier sees above, and improve microbial metabolism speed by biomembrance process, further decompose the organism in sewage, the time that sewage stops in aerobic reactor is 9 hours;
4, in the sedimentation and drawing stage: sewage enters settling tank after aerobic treatment, sedimentation time is 2 hours, and surface load is 1.5m
3/ m
2h.
It is as follows that precipitation finishes in rear supernatant liquor indices: COD is 15mg/L, and total nitrogen is 15mg/L, and ammonia nitrogen is 3.4mg/L, and total phosphorus is 1.3mg/L.
Embodiment 2
The COD for the treatment of sewage is 332mg/L, and total nitrogen is 176mg/L, and ammonia nitrogen is 59mg/L, and total phosphorus is 19mg/L.
Sewage is done to following processing
1, anaerobic treatment, treatment sewage flows into anaerobic biological reactor, this reactor adopts biomembrance process, carrier prepared by the residue that biofilm carrier employing utilizes cane sugar manufacture to produce, the preparation method of this carrier sees above, organism in sewage is tentatively decomposed and is removed under anerobe effect, and the time that sewage stops in anaerobic reactor is 6 hours;
2, dephosphorization is processed, and sewage enters dephosphorization pond flowing out in SBR pond, in dephosphorization pond, throws in dephosphorization agent, dephosphorization agent adopts take bauxitic clay as basic dephosphorization agent, the preparation method of this dephosphorization agent sees above, the agitator low rate mixing in dephosphorization pond then, and rotating speed is 25rmin
-1, the organo phosphorous compounds in dephosphorization agent and sewage forms flocs unit and forms precipitation, and sewage is 1.5 hours in the dephosphorization pond residence time, and chemical sludge is discharged by chemical sludge mud discharging mouth, and the consumption of dephosphorization agent is 1kg dephosphorization agent: 1 ton of sewage;
3, aerobic treatment: sewage enters aerobe reactor after flowing out from dephosphorization pond, this reactor adopts biomembrance process, carrier prepared by the residue that biofilm carrier employing utilizes cane sugar manufacture to produce, the preparation method of this carrier sees above, and improve microbial metabolism speed by biomembrance process, further decompose the organism in sewage, the time that sewage stops in aerobic reactor is 10 hours;
5, in the sedimentation and drawing stage: sewage enters settling tank after aerobic treatment, sedimentation time is 2 hours, and surface load is 1.5m
3/ m
2h.
It is as follows that precipitation finishes in rear supernatant liquor indices: COD is 17mg/L, and total nitrogen is 14mg/L, and ammonia nitrogen is 3.2mg/L, and total phosphorus is 1.1mg/L.
Embodiment 3
The COD for the treatment of sewage is 226mg/L, and total nitrogen is 123mg/L, and ammonia nitrogen is 35mg/L, and total phosphorus is 22mg/L.
Sewage is done to following processing
1, anaerobic treatment, treatment sewage flows into anaerobic biological reactor, this reactor adopts biomembrance process, carrier prepared by the residue that biofilm carrier employing utilizes cane sugar manufacture to produce, the preparation method of this carrier sees above, organism in sewage is tentatively decomposed and is removed under anerobe effect, and the time that sewage stops in anaerobic reactor is 5 hours;
2, dephosphorization is processed, and sewage enters dephosphorization pond flowing out in SBR pond, in dephosphorization pond, throws in dephosphorization agent, dephosphorization agent adopts take bauxitic clay as basic dephosphorization agent, the preparation method of this dephosphorization agent sees above, the agitator low rate mixing in dephosphorization pond then, and rotating speed is 30rmin
-1, the organo phosphorous compounds in dephosphorization agent and sewage forms flocs unit and forms precipitation, and sewage is 1 hour in the dephosphorization pond residence time, and chemical sludge is discharged by chemical sludge mud discharging mouth, and the consumption of dephosphorization agent is 1kg dephosphorization agent: 1 ton of sewage;
3, aerobic treatment: sewage enters aerobe reactor after flowing out from dephosphorization pond, this reactor adopts biomembrance process, carrier prepared by the residue that biofilm carrier employing utilizes cane sugar manufacture to produce, the preparation method of this carrier sees above, and improve microbial metabolism speed by biomembrance process, further decompose the organism in sewage, the time that sewage stops in aerobic reactor is 8 hours;
6, in the sedimentation and drawing stage: sewage enters settling tank after aerobic treatment, sedimentation time is 2 hours, and surface load is 1.5m
3/ m
2h.
It is as follows that precipitation finishes in rear supernatant liquor indices: COD is 21mg/L, and total nitrogen is 17mg/L, and ammonia nitrogen is 2mg/L, and total phosphorus is 1.4mg/L.
Simultaneous test
In order to verify the effect of dephosphorization agent of the present invention, dephosphorization agent of the present invention and commercially available dephosphorization agent are in the market contrasted.The dephosphorization agent that participates in contrast has the technical grade dephosphorization agent (being called for short dephosphorization agent A below) purchased from Shenzhen grand Science and Technology Ltd. of the mayor, Padsorbent series phosphorus efficiency sorbent material (being called for short dephosphorization agent B below) purchased from Zhangjagang City Lai Que Chemical Co., Ltd., purchased from the dephosphorization agent (being called for short dephosphorization agent C below) of changzhou city rivers and lakes Chemical Co., Ltd., the clearance that the project of comparison is phosphorus.
Test method is: get 100ml total phosphorous and be placed in beaker at the former water of 20～50mg/L, drop into 0.5g dephosphorization agent in beaker, stir the total phosphorous of measuring supernatant liquor after 30 minutes.The pH value of former water is adjusted to respectively to 5,7 and 11, to test the phosphor-removing effect of dephosphorization agent under different pH value environment.
Test-results is as shown in the table.Can find out, the phosphor-removing effect of dephosphorization agent of the present invention is suitable with the phosphor-removing effect of the dephosphorization agent sold in the market, but consider that dephosphorization agent of the present invention is that to take bauxitic clay and potassium permanganate be main body, add a small amount of polyacrylamide and water glass to form, with low cost, therefore dephosphorization agent of the present invention a kind of good dephosphorization agent of can yet be regarded as.
| Dephosphorization agent type | Total tp removal rate during pH5 | Total tp removal rate during pH7 | Total tp removal rate during pH11 |
| Dephosphorization agent of the present invention | 98.3％ | 95.1％ | 92.4％ |
| Dephosphorization agent A | 95.2％ | 96.4％ | 93.6％ |
| Dephosphorization agent B | 97.5％ | 99.0％ | 96.4％ |
| Dephosphorization agent C | 93.1％ | 94.2％ | 92.4％ |
Those skilled in the art can make and replacing or modification content of the present invention according to content disclosed by the invention and the art technology of grasping; but these replacements or modification should not be considered as departing from the present invention's design, and these replacements or modification are all in the claimed interest field of the present invention.
Claims (2)
1. the treatment process to urban life class sewage, is characterized in that the method comprises following step:
(1) anaerobic treatment, treatment sewage flows into anaerobic biological reactor, and this reactor adopts biomembrance process, and the organism in sewage is tentatively decomposed and is removed under anerobe effect, and the time that sewage stops in anaerobic reactor is 5～6 hours;
(2) dephosphorization is processed, and sewage enters dephosphorization pond flowing out in SBR pond, in dephosphorization pond, throws in dephosphorization agent, the agitator low rate mixing in dephosphorization pond then, and rotating speed is 20～30rmin
-1, the organo phosphorous compounds in dephosphorization agent and sewage forms flocs unit and forms chemical sludge precipitation, and sewage is 0.5～1.5 hour in the dephosphorization pond residence time, and chemical sludge is discharged by chemical sludge mud discharging mouth, and the consumption of dephosphorization agent is 1kg dephosphorization agent: 1 ton of sewage;
(3) aerobic treatment: sewage enters aerobe reactor after flowing out from dephosphorization pond, this reactor adopts biomembrance process, and improve microbial metabolism speed by biomembrance process, and further decompose the organism in sewage, the time that sewage stops in aerobic reactor is 8～10 hours;
(4) in the sedimentation and drawing stage: sewage enters settling tank after aerobic treatment, sedimentation time is 1.5～2 hours, and surface load is 1.0～2.0m
3/ m
2h, precipitation finishes rear supernatant liquor and can meet national I level emission standard;
Carrier prepared by the residue that the biofilm carrier employing of wherein using in the bio-reactor described in step (1) and (3) utilizes cane sugar manufacture to produce, the concrete preparation method of this carrier is as follows: the residue that cane sugar manufacture is produced cleans, subsequently residue is placed in to massfraction and is 18%～20% sodium hydroxide solution, soak 5～7h; Residue after alkalinisation treatment is carried out carrying out crosslinking reaction with excessive dicumyl peroxide after processed; Solid product and Trimethylamine 99 alcoholic solution that crosslinking reaction is generated carry out quaternary ammonium reaction, obtain solid product; After being cleaned and be dried, solid product becomes carrier of the present invention.
2. the treatment process to urban life class sewage described in claim 1, it is characterized in that wherein the dephosphorization agent described in step (2) is prepared in accordance with the following methods, take bauxitic clay as raw material, 80 object bauxitic clays are placed in to 10% potassium permanganate solution, the ratio of bauxitic clay and potassium permanganate is 1kg bauxitic clay: 1000ml potassium permanganate solution, bauxitic clay fully mixes formation suspension in potassium permanganate solution, then in suspension, add polyacrylamide and water glass and stir, the amount that adds polyacrylamide is 10g polyacrylamide: 1000ml suspension, the amount that adds water glass is 5g water glass: 1000ml suspension.
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|---|---|---|---|
| CN201210349369.4A CN102826723B (en) | 2012-09-20 | 2012-09-20 | Treatment method for urban sanitary sewage |
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|---|---|---|---|
| CN201210349369.4A CN102826723B (en) | 2012-09-20 | 2012-09-20 | Treatment method for urban sanitary sewage |
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| CN102826723B true CN102826723B (en) | 2014-01-22 |
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| CN109502912A (en) * | 2018-12-20 | 2019-03-22 | 中石化川气东送天然气管道有限公司 | A kind of highly effective dephosphorizing denitrification miniaturization membrane process domestic sewage treating apparatus |
| CN115490352A (en) * | 2021-06-20 | 2022-12-20 | 高峰 | Process for improving discharge standard of nitrogen and phosphorus in secondary biochemical effluent of municipal domestic sewage |
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| US7713417B2 (en) * | 2007-03-16 | 2010-05-11 | Envirogen Technologies, Inc. | Method for wastewater treatment with resource recovery and reduced residual solids generation |
| CN101434445A (en) * | 2008-12-19 | 2009-05-20 | 天津大学 | Processing system and operation method for phosphor-containing organic wastewater |
| CN101580329B (en) * | 2009-07-01 | 2011-04-20 | 北京城市排水集团有限责任公司 | Device for anaerobic removal of organic matters in municipal sewage and denitrification of autotrophic organism and method |
| CN101792236B (en) * | 2010-03-29 | 2011-11-02 | 重庆大学 | Sewage treatment method |
| CN102001784B (en) * | 2010-10-18 | 2012-05-23 | 余静 | High efficiency low energy consumption urban sewage dephosphorization denitrification treatment method |
| CN101973672B (en) * | 2010-10-18 | 2012-03-28 | 余静 | Zero-energy consumption urban sewage dephosphorization treatment method |
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Application publication date: 20121219 Assignee: ATK Holding Group Co., Ltd. Assignor: Jiangsu ATK Environment Engineering Co., Ltd. Contract record no.: 2015320000264 Denomination of invention: Treatment method for urban sanitary sewage Granted publication date: 20140122 License type: Exclusive License Record date: 20150420 |
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Effective date of registration: 20160309 Address after: 214214 Jiangsu province Yixing gaochengzhen Foreign Investment Industrial Park Yi Road No. 68 Patentee after: Jiangsu ATK Environment Engineering Co., Ltd. Patentee after: ATK HOLDINGS GROUP CO., LTD. Address before: 214214 Jiangsu province Yixing gaochengzhen Foreign Investment Industrial Park Yi Road No. 68 Patentee before: Jiangsu ATK Environment Engineering Co., Ltd. |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhou Namin Inventor after: Wu Yuanwen Inventor after: Lv Youji Inventor before: Zhou Yaqiang Inventor before: Wu Yuanwen Inventor before: Lv Youji |
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