CN1594140A - Domestic sewage treatment method by intermittent aeration contact oxidation process - Google Patents

Domestic sewage treatment method by intermittent aeration contact oxidation process Download PDF

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Publication number
CN1594140A
CN1594140A CN 200410015578 CN200410015578A CN1594140A CN 1594140 A CN1594140 A CN 1594140A CN 200410015578 CN200410015578 CN 200410015578 CN 200410015578 A CN200410015578 A CN 200410015578A CN 1594140 A CN1594140 A CN 1594140A
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China
Prior art keywords
intermittent aeration
oxidation pool
aeration contact
contact
water
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CN 200410015578
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Chinese (zh)
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CN1281523C (en
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戴双建
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戴双建
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Publication of CN1281523C publication Critical patent/CN1281523C/en

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Abstract

The invention provides a domestic sewage treatment device and method by intermittent aeration contact oxidation process, wherein the device comprises a regulating reservoir (or water collecting tank), an naerobic pool, an intermittent aeration contact oxidation pool, a deposition pool and pipe-lines, water pumps for connecting these pools, a bagger is arranged on the extremity end of the intermittent aeration contact oxidation pool. The intermittent aeration contact oxidation pool can be charged with agents on the tail end as required, the sludge in the bagger returns to the anaerobic pool for treatment.

Description

The intermittent aeration contact oxidation method is handled sanitary sewage

Technical field

Intermittent aeration contact oxidation method of the present invention is handled sanitary sewage, the treatment process and the facility that relate to a kind of sanitary sewage, it is by equalizing tank (or water collecting basin), anaerobic pond, intermittent aeration contact-oxidation pool, and settling tank and the support equipments such as pipeline, water pump that connect these ponds are formed.In the intermittent aeration contact-oxidation pool filler is arranged, the pond type adopts the pulling flow type design, and its end has bucket.90% the flooding quantity that the normal processing water yield is arranged from equalizing tank to anaerobic pond, 10% the water yield that the normal processing water yield is arranged from equalizing tank to intermittent aeration contact-oxidation pool, the alternative adding medicine of intermittent aeration contact-oxidation pool tail end, and the bucket sludge part is back to anaerobic pond.

This method has excellent dephosphorization denitrogenation function, and stable effluent quality also can reach reuse standard according to demand.

Background technology

The intermittent aeration biotechnology generally is used among the SBR (sequencing batch reactor) at present.Because SBR method structures are few, reduced investment, occupation of land are lacked, aeration time is short, the efficient height, the anti impulsion load ability is strong, and flexible operation, adaptability are strong, but dephosphorization denitrogenation, therefore development is rapid, has developed at present multiple modification novel process, as technologies such as ICEAS, CAST, CASS, DAT-IAT, MSBR, UNITANK.But meanwhile also there are many shortcomings in it: (1) automatization control requires high; (2) during intermittent drainage because water discharge time is short and require not stir the precipitating sludge layer during draining, thereby need special water-freeing arrangement (straining hydrophone), and very high to straining the hydrophone requirement; (3) finishing apparatus is huge: very big as sterilization equipment, the contact tank volume is also very big, and pumping equipment and drainage pipeline are also very big; (4) strain water depth and be generally 1-2m, this part head loss wastes has increased total (pumping) head.

And traditional A/O method, A 2/ O method is difficult to further improve owing to the backflow water yield is big and the denitrogenation dephosphorizing effect is very limited.

Summary of the invention

Purpose of the present invention

This process using intermittent aeration contact oxidation method, the water outlet of intaking continuously, and water intake mode adopts multipoint water feeding can be got top several growing of technology and gone it short.The characteristics of this technology are as follows:

1, adopt intermittent aeration, the intermittent time can be regulated and control flexibly, makes that its generation is aerobic, anoxybiotic alternate run pattern and need not refluxing.

2, adopt the pulling flow type design, have the numerous advantages of SBR, but strain hydrophone etc. than complex apparatus because the water of being back to back can save, need not waste the 1-2m gross head, follow-up equipment does not also need too huge.

3, owing to adopt multipoint water feeding and intermittent aeration, do not need the backflow of big yield can be smoothly and finish the nitrification and denitrification process more completely, domestic sewage denitrifying rate height is well suited for the characteristics of the low C/N ratio of China's sanitary sewage.

4, since remove than the tail end nitric nitrogen at the intermittent aeration contact-oxidation pool more thorough, thereby the mud that passes back into anaerobic pond can be exempted the oxygenizement of nitrate etc., thereby help the anaerobic phosphorus release of polyP bacteria, improve whole phosphor-removing effect.

5, this technology also can be chosen in the dephosphorization of intermittent aeration contact-oxidation pool tail end adding medicine.The processing requirements that this phosphate concn for certain areas emission standard regulation strictness is lower than 0.5mg/L can reach easily, and treatment effect is stable, reliable, the reagent consumption amount is low, structures and equipment is few, the operation is easy.And through overregulating the dosing amount and increasing last water outlet disinfection apparatus, water outlet can reach water quality reuse requirement.

6, in fact this process sludge has passed through precipitation twice, and aeration was finished during intermittence in the intermittent aeration contact-oxidation pool for the first time; In the post precipitation pond, finish for the second time, greatly alleviated the load in post precipitation pond, can exempt mud and the situation that the anaerobism rising phenomenon influences effluent quality in settling tank, occur, guarantee stable effluent quality.

7, the every aeration of this intermittent aeration contact-oxidation pool then stopped 15-30 minute (for typical domestic wastewater) in 2 hours, certainly also can regulate and control flexibly according to the water quality situation, reduce the duration of service of gas blower in this case, therefore can reduce the quantity of emergency blower, reduce construction costs.

8, this technology discontinuous aeration contact-oxidation pool hydraulic detention time is 3~6.5 hours, anaerobic pond hydraulic detention time before is 1~2.5 hour, the settling tank hydraulic detention time is 1~2 hour, the sludge quantity that is back to anaerobic pond from intermittent aeration contact-oxidation pool bucket is 10% of the normal processing water yield, and excess sludge seldom.

9, this intermittent aeration contact-oxidation pool has utilized the principle of rectangular sedimentation tank, and mud flows and sinks to sludge bucket when aeration not, it is not produced big influence when making aeration, thereby mud can be refluxed or handle, and alleviates post precipitation pond load.

10, filler is that fiber is easy to grow bacterium and not susceptible to plugging filler with polyvinyl chloride combined stuffing or other in this intermittent aeration contact-oxidation pool, and its biological fixed amount is higher; Aeration adopts the gas blower aeration, and aerator adopts the porous aeration flexible pipe to carry out the wire aeration, and its hole is collapsible, and difficult obstruction and aeration rate are even, and oxygen transfer efficiency is higher; The sludge discharged machine room that advances to dewater is as requested handled.

11, this processing method because the mud major part all passes back into the anaerobic pond anaerobism, and sludge output is lower, reduces construction costs and working cost when adding medicine not; If the processing requirements height needs adding medicine, the mud of mainly handling when then mud is handled in the settling tank need not handled the interior microbial film mud of intermittent aeration contact-oxidation pool, also can reduce working cost largely.

Description of drawings

Accompanying drawing one is the flow diagram of this processing method without adding medicine.

Accompanying drawing two is this processing method adding medicine flow diagram, and water outlet can reach middle water reuse standard.

Accompanying drawing three is a roughly schema of this processing method.

Accompanying drawing four is the general diagram of intermittent aeration contact-oxidation pool.

Solid arrow is represented current direction in accompanying drawing one and the accompanying drawing two, dotted arrow represent sludge stream to.

In the accompanying drawing three sanitary sewage after 1. grating tank excludes scum silica frost equalizing tank 2. in regulating pondage and water quality, pump into anaerobic pond 3. through lift pump, anaerobism discharges phosphorus therein, then from flowing into the intermittent aeration contact-oxidation pool, 4. and 5. 2: 1 by volume minute two-stages of intermittent aeration contact-oxidation pool, combined stuffing wherein is housed,, significantly removes COD at this pond front end through intermittent aeration Cr, BOD 5, take place aerobicly to take the photograph phosphorus reaction and nitration reaction takes place, anti-nitration reaction takes place in the rear end, remove phosphorus reaction, the waste water stop over expose to the sun in the back bucket precipitation and settling tank 6. the phosphatic concentration of post precipitation can reach substantially and be lower than 1mg/L, be lower than 0.5mg/L if need reach, can select to add aluminium salt or molysite, and the requirement of water outlet water reuse in sterilization can reach.

The general diagram of the intermittent aeration contact-oxidation pool of accompanying drawing four, be pulling flow type on the whole, and can make two-stage, about 2: 1 of front and back volume ratio, pump into the former water of equalizing tank of the 10% normal processing water yield at partial head end, anti-nitration reaction is finished in the time of aeration smoothly stopping, need not refluxed and replenish outer Ensure Liquid.

Embodiment

Example 1

300 tons/day of certain hotel's sanitary sewage water yields (12.5 tons/hour), sewage quality is CODcr=339.4mg/L, BOD 5=207.3mg/L, TP=4.16mg/L, NH 3-N=45.3mg/L.Build a sewage treatment facility according to above-mentioned processing method, hydraulic detention time is designed to:

Grid equalizing tank 8 hours, 100 cubes of net volumes;

Anaerobic pond is 2 hours, 25 cubes of net volumes;

The intermittent aeration contact-oxidation pool is 6 hours, 75 cubes of net volumes, and its tail end adds a small amount of polymerization

Aluminum chloride or ferrous sulfate dephosphorization;

Settling tank 2.5 hours, 31.3 cubes of net volumes.

Then total hrt is 18.5 hours, and cubic capacity is 232 cubes.

Handle back water quality:

CODcr=23.0mg/L,BOD 5=9.1mg/L,TP=0.31mg/L,NH 3-N=4.2mg/L。

Gross investment is about 120,000 yuan, 400 yuan of/ton water of comprehensive cost.But its water outlet is the water reuse in sterilization can be used as, and working cost can be offset major part.

Claims (6)

1, a kind of domestic sewage processing method is characterized in that: it is made up of institutes such as equalizing tank (or water collecting basin), anaerobic pond, intermittent aeration contact-oxidation pool, settling tanks.
2, intermittent aeration contact-oxidation pool according to claim 1, it is characterized in that: in the intermittent aeration contact-oxidation pool filler is housed, the pond type is pressed the pulling flow type design, and it is not held and has bucket, and wherein mud is back to anaerobic pond by treating water flow 10%, perhaps handles.
3, the aeration mode of intermittent aeration contact-oxidation pool is that aeration stopped after 2 hours 15~30 minutes, and then continues to expose to the sun 2 hours, and so circulation also can suitably extend aeration or time intermittently according to the water quality situation certainly.
4, anaerobic pond hydraulic detention time according to claim 1 is 1~2.5 hour, and the intermittent aeration contact-oxidation pool is about 3~6.5 hours, and the settling tank hydraulic detention time is about 1~2.5 hour.
5, according to claim 1 described treatment process water intake mode be: equalizing tank sewage enters anaerobic pond with normal processing discharge 90%, and 10% enters the intermediate point of intermittent aeration contact-oxidation pool, and this intermediate point is 2: 1 place about the front and back volume ratio.
If 6 reach below the 0.5mg/l for reaching reuse requirement or phosphate concn, can be chosen in the local adding medicine than tail end of intermittent aeration contact-oxidation pool, as aluminium salt, molysite etc.
CN 200410015578 2004-03-02 2004-03-02 Domestic sewage treatment method by intermittent aeration contact oxidation process CN1281523C (en)

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Application Number Priority Date Filing Date Title
CN 200410015578 CN1281523C (en) 2004-03-02 2004-03-02 Domestic sewage treatment method by intermittent aeration contact oxidation process

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CN1281523C CN1281523C (en) 2006-10-25

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102153242A (en) * 2011-04-27 2011-08-17 常州市宣塘豆制品市场有限公司 Sewage treatment process and sewage treatment mechanism
CN102249426A (en) * 2011-05-16 2011-11-23 隆润新技术发展有限公司 GET full biological enzyme water quality stabilizer applied to field of treatment of circulating cooling water
CN102559498A (en) * 2011-12-31 2012-07-11 山东水务环保集团有限公司 Nutritional agent for culturing microorganisms and microorganism culturing method
CN102862653A (en) * 2012-09-03 2013-01-09 乔拥军 Sewage treatment boat
CN105692903A (en) * 2016-04-08 2016-06-22 广西宇达水处理环保工程有限公司 Wastewater treatment system
CN105967459A (en) * 2016-07-18 2016-09-28 江超 Sequencing batch reactor (SBR) water purification technology and operation method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108516653A (en) * 2018-05-25 2018-09-11 哈尔滨工程大学 A kind of MBBR couples boat domestic sewage treatment device and method with electric flocculation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102153242A (en) * 2011-04-27 2011-08-17 常州市宣塘豆制品市场有限公司 Sewage treatment process and sewage treatment mechanism
CN102249426A (en) * 2011-05-16 2011-11-23 隆润新技术发展有限公司 GET full biological enzyme water quality stabilizer applied to field of treatment of circulating cooling water
CN102249426B (en) * 2011-05-16 2013-09-11 隆润新技术发展有限公司 GET full biological enzyme water quality stabilizer applied to field of treatment of circulating cooling water
CN102559498A (en) * 2011-12-31 2012-07-11 山东水务环保集团有限公司 Nutritional agent for culturing microorganisms and microorganism culturing method
CN102559498B (en) * 2011-12-31 2013-04-03 山东水务环保集团有限公司 Nutritional agent for culturing microorganisms and microorganism culturing method
CN102862653A (en) * 2012-09-03 2013-01-09 乔拥军 Sewage treatment boat
CN105692903A (en) * 2016-04-08 2016-06-22 广西宇达水处理环保工程有限公司 Wastewater treatment system
CN105967459A (en) * 2016-07-18 2016-09-28 江超 Sequencing batch reactor (SBR) water purification technology and operation method thereof

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