CN1834031A - Sewage treatment technique for denitrifying denitrification and descaling - Google Patents

Sewage treatment technique for denitrifying denitrification and descaling Download PDF

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Publication number
CN1834031A
CN1834031A CNA2006100434222A CN200610043422A CN1834031A CN 1834031 A CN1834031 A CN 1834031A CN A2006100434222 A CNA2006100434222 A CN A2006100434222A CN 200610043422 A CN200610043422 A CN 200610043422A CN 1834031 A CN1834031 A CN 1834031A
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China
Prior art keywords
sludge
phosphorus
reactor
denitrifying
bacteria
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CNA2006100434222A
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CN100400437C (en
Inventor
裴海燕
胡文容
张继才
潘建强
王冠
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Shandong University
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Shandong University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

This invention relates to a new sewage treatment technique by denitrifying nitrogen and phosphorus removal, which comprises a reactor and two sludge pools. In this technique, pollutants are removed by interaction between two kinds of sludge, which conquers the disadvantages in conventional nitrogen and phosphorus removal techniques. Besides denitrifying phosphorus bacteria, ordinary phosphorus accumulating bacteria are also utilized, which eliminates the drawback of denitrifying phosphorus removal technique. In this invention, water cycling is replaced by sludge cycling, therefore power for driving water cycling is saved and aeration and sludge amount can be lowered by approximately 20% and 30%, respectively, compared to ordinary techniques. It is suitable for life sewage disposal in rural areas and small towns.

Description

A kind of sewage treatment technique of denitrification nitrogen and phosphorus removal
One, technical field
The invention belongs to the environmental engineering water-treatment technology field, be specially adapted to the processing of rural area and small town sewage.
Two, background technology
Denitrogenation dephosphorizing is a great problem of sewage treatment area.Traditional A 2/ O, improvement A 2Though technology such as/O, oxidation ditch generally has the denitrogenation dephosphorizing effect, but reactor is many, complex process, the energy consumption height, often the good phosphor-removing effect of denitrification effect is poor, just in time opposite situation perhaps occurs.In order to obtain denitrogenation dephosphorizing rate preferably simultaneously, need to increase mud and reflux or additional carbon, not only increase the technology working cost, and produced a large amount of excess sludges.China samll cities and towns have built up or have planned to build the sewage treatment process of establishing, and the overwhelming majority adopts the sewage treatment process of existing big city large-scale wastewater treatment plant, and characteristics such as the sewage quality of samll cities and towns, the water yield are lacked specific aim.Denitrification dephosphorization is the new technology of the green Sustainable development of rising recently, electron acceptor(EA) when it replaces oxygen as dephosphorization with nitrate radical, with denitrogenation and dephosphorization process close two for, can overcome the contradiction that exists between traditional technology denitrogenation and the dephosphorization, reduce aeration rate, reduce sludge yield, but that the denitrification dephosphorization technology also exists dephosphorization efficiency by using is not high, phosphorus and nitrate radical need satisfy deficiencies such as certain proportion, have limited its application in actual sewage is handled.China document " A 2N denitrification dephosphorization denitrification technology and influence factor thereof " (2003; 19 (9): 8-11) reported Continuous Flow denitrification dephosphorization denitrification technology; its reactor is many, needs the circulation of sewage and mud simultaneously, phosphorus is not removed halfway contradiction when solving phosphorus and nitrate radical proportional imbalance.
Three, summary of the invention
The objective of the invention is characteristics, propose a kind of denitrogenation dephosphorizing novel process, reduce the construction and the working cost of sewage disposal at rural area and small town sewage.
The present invention's " a kind of sewage treatment technique of denitrification nitrogen and phosphorus removal ", main gordian technique is to be made up of a reactor and two sludge sumps, and two kinds of mud are alternately had an effect circulating between sludge sump and reactor separately.Technology of the present invention to utilize denitrifying phosphorus removing bacteria, has been utilized conventional polyP bacteria simultaneously when dephosphorization, polyP bacteria was finished partially absorbing phosphorus before denitrifying phosphorus removing bacteria.Reactor top in the process unit of the present invention can be cylindrical or four prism type, and upper end open is inclination angle 30 degree cones below.Aeration tube and agitator are set in the reactor, and reactor bottom is provided with the mud discharging pipe, and sidewall is provided with water shoot.Two sludge sump separated deposit denitrifying phosphorus removing bacteria mud and nitrifying sludge, size shape is the same, similar with reactor, can be cylindrical or four prism type above, upper end open, be inclination angle 30 degree cones below, its volume is determined according to the water quality of sewage, is generally 1/3rd of reactor useful volume.Two sludge sumps should be located at reactor below so that mud is by gravity flowage, reactor bottom is connected with sludge sump by pipeline, is connected with sludge reflux pump by pipeline bottom the sludge sump, then the ligation device.The sludge sump top of depositing DPB mud has a water pipe to link to each other with reactor by water pump in addition.Aerator adopts air compressor, and shows flow by under meter.
Technology of the present invention is moved in the following manner:
I. the domestication of mud is cultivated.Inoculation of activated-sludge from other sewage treatment structure is divided into two then and drops into two sludge sumps,
(1) sanitary sewage enters reactor by water inlet pipe, opens agitator simultaneously, stirs;
(2) close agitator after for some time, leave standstill half an hour;
(3) open valve the mud in the reactor entered the denitrifying phosphorus removing bacteria sludge sump, then with mud in the nitrifying sludge pond by pump sucting reaction device, open agitator then and stir, close agitator after for some time, open air compressor then and carry out aeration; Before this stage finishes, will fully react in the supernatant liquor of the post precipitation immigration reactor in the denitrifying phosphorus removing bacteria sludge sump;
(4) close agitator, leave standstill half an hour;
(5) open valve the mud in the reactor entered the nitrifying sludge pond, then with mud in the denitrifying phosphorus removing bacteria sludge sump by pump sucting reaction device, open agitator then, stir;
(6) close agitator after for some time, leave standstill half an hour, then draining
II. after maturation is cultivated in sludge acclimatization, according to the water sample monitoring data, determine the reasonable time in (1)-(9) stage, the processing of sewage moves by (1)-(9) mode.
The characteristics of technology of the present invention:
The sewage treatment technique of a kind of denitrification nitrogen and phosphorus removal of the present invention, adopt two kinds of mud, reaction unit is made up of a reactor and two sludge sumps, the mud age of denitrification dephosphorization technique existence in the past and the contradiction of carbon source competition have been solved, aeration rate and sludge yield have been saved, technology of the present invention has only the mud circulation, has saved water cycle, has reduced working cost.
Denitrifying phosphorus removing bacteria plays a role simultaneously with the polyP bacteria of routine in the technology of the present invention, conventional polyP bacteria utilized residual organic substances to remove phosphorus in a part of sewage earlier before denitrification, solved denitrification dephosphorization stage phosphorus with the ratio of nitrate radical when unbalance phosphorus remove halfway deficiency.
Four, description of drawings:
Fig. 1 has provided the setting drawing of technology of the present invention, 1. is reactor, 2. denitrification dephosphorization sludge sump, 3. nitrifying sludge pond, 4. being air compressor, 5. is sump pump, 6. is sludge reflux pump, 7. is water inlet pipe, 8. being water shoot, 9. is valve, 10. is air flowmeter, and is an agitator
Five, embodiment
Provide a most preferred embodiment of the present invention below:
At producing the sanitary sewage water yield every day is 13 tons, water quality is BOD100~200mg/L, COD150~450mg/L, ammonia nitrogen 20~50mg/L, the samll cities and towns of phosphorus 2~8mg/L, the high 3 meters right cylinder reactor of building 1.2 meters of radiuses is (as shown in Figure 1) 1., reactor is that an inclination angle is the cone-shaped bodys of 30 degree below 1., establish 1.2 meters of two radiuses simultaneously, 2., 3. high 1 meter right cylinder sludge sump is that an inclination angle is the cone-shaped bodys of 30 degree below the sludge sump.The connection of sewer line and water pump, air compressor etc. as shown in Figure 1.At first carrying out the domestication of active sludge cultivates.From other sewage treatment structure inoculation of activated-sludge, be divided into two then and drop into sludge sump 2., 3., input amount is to guarantee that the 1. interior sludge concentration of reactor is that 4000mg/L is a standard.6. the sucting reaction device is 1. by sludge pump with the mud of sludge sump in 2., open intake pump then 5., 7. sewage enter reactor from water inlet pipe, after water inlet finishes, opening agitator stirs, close agitator after 2 hours, left standstill 0.5 hour, open the valve mud that reactor is 1. interior then and enter sludge sump 2., with sludge sump 3. in mud 6. the sucting reaction device is 1. by sludge pump, opening agitator stirred 0.5 hour, close agitator, open air compressor then and 4. carried out aeration 4.5 hours, according under meter 10. show adjust the flow size (aeration finishes preceding 1 hour, with sludge sump 2. in fully the supernatant liquor of post precipitation move into reactor and react in 1.); Close agitator , left standstill 0.5 hour; Open valve 3. the mud of reactor in 1. entered sludge sump, then with sludge sump 2. in mud by 6. sucting reaction device of sludge pump; Open agitator and stir, the reaction times is 3 hours; Close agitator , left standstill 0.5 hour, then by 8. draining of water shoot.Move one-period or operation continuously every day.
Sludge acclimatization is determined the rational reaction times in each stage according to the monitoring data of water quality after cultivating maturation.Operation scheme is undertaken by explanation then.The effluent quality index is as follows: COD<50mg/L, TN<15mg/L, TP<0.5mg/L.

Claims (2)

1. the sewage treatment technique of a denitrification nitrogen and phosphorus removal is characterized in that being made up of a reactor and two sludge sumps, and two kinds of mud are alternately had an effect circulating between sludge sump and reactor separately.
2. the sewage treatment technique of a kind of denitrification nitrogen and phosphorus removal according to claim 1, when it is characterized in that dephosphorization to utilize denitrifying phosphorus removing bacteria, utilized conventional polyP bacteria simultaneously, polyP bacteria was finished partially absorbing phosphorus before denitrifying phosphorus removing bacteria.
CNB2006100434222A 2006-04-06 2006-04-06 Sewage treatment technique for denitrifying denitrification and descaling Expired - Fee Related CN100400437C (en)

Priority Applications (1)

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CNB2006100434222A CN100400437C (en) 2006-04-06 2006-04-06 Sewage treatment technique for denitrifying denitrification and descaling

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Application Number Priority Date Filing Date Title
CNB2006100434222A CN100400437C (en) 2006-04-06 2006-04-06 Sewage treatment technique for denitrifying denitrification and descaling

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CN1834031A true CN1834031A (en) 2006-09-20
CN100400437C CN100400437C (en) 2008-07-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102220264A (en) * 2011-05-09 2011-10-19 山东大学 Facultatively anaerobic denitrifying bacteria and application thereof in biological denitrification of water body
CN102372394A (en) * 2010-08-20 2012-03-14 中国科学院生态环境研究中心 Method for treating rural sewage with effect of removing phosphate and nitrogen
CN102703361A (en) * 2012-06-19 2012-10-03 山东大学 Facultative anaerobic denitrifying bacterium with self-flocculation capability and purpose thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5536407A (en) * 1995-02-21 1996-07-16 I. Kruger, Inc. Nitrification and denitrification wastewater treatment process
KR100225971B1 (en) * 1997-06-23 1999-10-15 한상배 Wastewater treatment methods and plants for removing nitrogen and phosphor
JP3437991B2 (en) * 2000-04-04 2003-08-18 兵庫県土地改良事業団体連合会 Anaerobic / aerobic activated sludge treatment method and apparatus
CN1137863C (en) * 2000-04-06 2004-02-11 李钧 Biologic process for treating sewage
FR2814454B1 (en) * 2000-09-27 2002-12-20 Degremont PROCESS FOR THE PURIFICATION OF WASTEWATER FOR THE ELIMINATION OF NITROGEN AND PHOSPHATE POLLUTIONS
US7261811B2 (en) * 2000-10-02 2007-08-28 The University Of Western Ontario Liquid-solid circulating fluidized bed waste water treatment system for simultaneous carbon, nitrogen and phosphorus removal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102372394A (en) * 2010-08-20 2012-03-14 中国科学院生态环境研究中心 Method for treating rural sewage with effect of removing phosphate and nitrogen
CN102220264A (en) * 2011-05-09 2011-10-19 山东大学 Facultatively anaerobic denitrifying bacteria and application thereof in biological denitrification of water body
CN102703361A (en) * 2012-06-19 2012-10-03 山东大学 Facultative anaerobic denitrifying bacterium with self-flocculation capability and purpose thereof
CN102703361B (en) * 2012-06-19 2013-10-23 山东大学 Facultative anaerobic denitrifying bacterium with self-flocculation capability and purpose thereof

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Granted publication date: 20080709

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