CN103449658B - Sewage treatment method - Google Patents

Sewage treatment method Download PDF

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Publication number
CN103449658B
CN103449658B CN201210178195.XA CN201210178195A CN103449658B CN 103449658 B CN103449658 B CN 103449658B CN 201210178195 A CN201210178195 A CN 201210178195A CN 103449658 B CN103449658 B CN 103449658B
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sewage
pool
water
sludge
aerobic biochemical
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CN103449658A (en
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张延涛
宁艳春
饶辉凯
蒲文晶
苗磊
杨晓明
钟大辉
刘巍
耿长君
吕利民
庄立波
岳春雨
陈绮莉
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Petrochina Co Ltd
China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Abstract

The invention relates to a sewage treatment method. The method is as below: sending domestic sewage into an oil separator through a machinery grating, and then sending the sewage into a hydrolysis-acidification pool to decompose macro-molecular organic matters in the sewage into micromolecular organic matters, so as to remove part of COD; sending the sewage into a primary settling tank to concentrating sludge and discharging the sludge into a sludge storage tank; sending an upper clarified liquor into an anoxic biochemical pool; carrying out an denitrification reaction on the sewage and a nitrated liquid flowing back from an aerobic biochemical pool; introducing effluent into the aerobic biochemical pool for aerobic biochemical reaction, and sending the other part of the sewage into a secondary settling tank through an overflow weir; concentrating the sludge, discharging the sludge into the sludge storage tank and flowing the upper clarified liquor into a clear water tank; part of the sludge in the sludge storage tank flows back to the hydrolysis-acidification pool; and conveying clear water to a biological active carbon reactor, flowing outlet water into an ozone contact pool and disinfecting the water outlet for reuse. The method has stable treatment effect, generates a small amount of sludge; residual sludge returns to the nature; and treated sewage is reused in water-scenery and greening, so as to save sewage charge and reduce environmental pollution.

Description

A kind of sewage water treatment method
Technical field:
The present invention relates to a kind for the treatment of process of dispersant type domestic wastewater, relate in particular to the treatment process of the sanitary sewages such as a kind of sanatorium, large hotel hotel, amusement and travel holiday village, mountain villa, landscaped area, Expressway Service.
Background technology
China's Water Pollution Prevention Law specifies that the sewage of crowd settlement discharge of the dispersions such as Residential areas to not including municipal sewage collection system system in, tourist attractions, holiday village, sanatorium, airport, railway station, economic and technological development zone and the trade effluent in the land of independent industries and mining district should process qualified discharge on the spot.Sanatorium, large hotel hotel, large-scale restaurant, amusement and travel holiday village, mountain villa, landscaped area, Expressway Service are all dispersant type domestic wastewater emission sources.Generally all being situated at the foot of a hill and beside a stream in sanatorium, holiday village, mountain villa, away from city, cannot be connected with urban drainage pipe network.Also relate in addition sensitive water body, therefore the standard-required of discharge is very high, if realize qualified discharge, the investment meeting of sewage treatment facility is very large, and working cost also can correspondingly improve.
The water quality of the dispersant type domestic wastewaters such as sanatorium generally comprises kitchen and dining room draining; Bathing, washing, laundry draining and toilet drainage, compared with sanitary sewage water quality, the pending pollutant loads such as oil, washing composition, nitrogen, phosphorus can be higher, has the water yield to change greatly water quality complexity, the feature such as difficult.This type of change of water quality amplitude is larger, chemical oxygen demand (COD) (COD): 300~500mg/L; Ammonia nitrogen (NH 3-N): 20~60mg/L; Total phosphorus (TP): 2.6~3.7mg/L; Suspended substance (SS): 200~500mg/L.Owing to being connected with urban drainage pipe network, even through biological treatment, reach the one-level category-A standard in " urban wastewater treatment firm pollutant emission standard GB18918-2002 ", enter water body and also will affect greatly environment.
At present such sewage adopts membrane bioreactor (Membrane Bioreactor, MBR) art breading more, can reach that relevant criterion is discharged or reuse after processing.Membrane bioreactor combines traditional biological treatment and membrane separation technique, is a kind of water technology that is replaced secondary sedimentation basins and sand filter in traditional biochemical processing by membrane filtration.Membrane bioreactor replaces second pond with film unit (ultra-filtration membrane or microfiltration membrane), and all suspended substances and colloid are all held back by membrane sepn, and the settleability of mud can not have influence on effluent quality.Meanwhile, film separation unit has increased the concentration of active sludge in aeration tank, has improved biodegradable speed, and has reduced the generation of excess sludge.
Membrane bioreactor (MBR) at present shortcoming is film blockage problem, and back flushing problem causes thus operation maintenance difficulty, thereby causes the life-span of film short, and because of the price comparison costliness of film, therefore working cost is high again!
The reason that film stops up is, the nutritive ingredient in food and drink waste water is mainly oil, starch, protein etc., through decomposition, the sorption of microorganism, is converted into energy and the part of self.Microorganism eubolism can produce viscous polysaccharide class material, adhesive polypeptide molecule and protein molecule etc.After bacterium death, these material parts can be utilized by other Institute of Micro-biology, and a part may be present in active sludge intermixture.Equally, also can part be taken in by microorganisms such as bacteriums from a small amount of inorganic salt of food and drink waste water, remainder is also present in active sludge intermixture.These remain in the composition in mud mixed liquid, finally arrive film surface, have formed the gel coat that stops up film.
CN1994937 has introduced the air float-oxygen-enriched biological treatment of a kind of hotel sewage and reuse method.Its technical process is: sewage, through equalizing tank, anaerobic fixed film reactor, air flotation pool, oxygen enrichment biological contact oxidation pond, activated carbon filter, disinfection by chlorine dioxide pond, reaches the index of reuse water.In technique, need to add polymerize aluminum chloride, carry out coagulation, after air supporting, produce a large amount of scum silica frost.Cause the pollution of solid waste.
Summary of the invention
The object of this invention is to provide a kind for the treatment of process of dispersant type domestic wastewater, the particularly treatment process of distributing food and drink accommodation service place sewage, the method can ensure effective processing of such sewage, can realize safely reusing sewage, realizes the zero release of sewage.After treatment, water outlet can reach " urban sewage reutilization city miscellaneous water water quality ", and (GB/T18920-2002), the strictest leading indicator is this kind of waste water: five-day BOD BOD 5≤ 10mg/L; Suspended solids≤10mg/L; Turbidity≤10 degree; Colourity≤30 degree; PH:6.0~9.0; Total coli group≤3/L; Smell: feel without unplessantness displeasure; Free chlorine residual: pipe network end is no less than 0.2mg/L.Water outlet all as in water carry out reuse.
Water outlet after sewage disposal is except being back to reclaimed water, and in residue, water enters Landscape River, man-made lake or water scenery class water body, carries out the water quality standard GB18921-2002 of reuse water for landscape water body.Adopt this Process for Effluent water quality all to reach in the standard of the strictest water scenery class of ornamental water for scenic environment use in " urban sewage reutilization scape existing water use for environment water quality ": five-day BOD (BOD 5)≤6; Suspended substance (SS)≤10; Total phosphorus (in P)≤0.5; Total nitrogen≤15; Ammonia nitrogen (in N)≤5; Colourity (degree)≤30; Excrement colibacillus group (individual/L)≤2000; Petroleum-type≤1.0.
The technical scheme that sewage water treatment method of the present invention is taked is: such dispersant type domestic wastewater is through grid, oil trap, hydrolysis acidification pool, preliminary sedimentation tank, anoxic biochemistry pool, aerobic biochemical pool, second pond, clean water basin, biological activated carbon reactor, ozone contact tank, water outlet fully recovering.
Its concrete steps are as follows:
Sanitary sewage through structures septic tank enters waste water processing station through pipeline.Because containing a certain amount of macrobead suspended substance and floating matter in sewage, before entering oil trap, first through one mechanical grille, these macrobeads and floating matter interception are removed in sewage, and enter oil trap through the sewage of mechanical grille coarse filtration, then enter hydrolysis acidification pool.
At hydrolysis acidification pool, the larger molecular organics in sewage is decomposed into small organic molecule, remove part COD, alleviate the load of follow-up aerobe processing.At the bottom of pond, be provided with perforated pipe aerating regulation device, pass into air, can prevent sludgd deposition, can play again homogenizing water quality and preaeration effect; Combined stuffing is set in pond, and combined stuffing is made up of plastics semi soft packing and fiber soft-filler.By microbial process, play certain acidication effect.
Sewage rises to preliminary sedimentation tank by inlet water lifting pumps in hydrolysis acidification pool, carries out mud-water separation, and mud deposits concentrated in sludge bucket, relies on liquid pressure to enter storage basin by sludge valve.Top clear liquor is flow automatically and is entered anoxic biochemistry pool by overflow weir; , there is anti-nitration reaction in the sewage coming from preliminary sedimentation tank and the nitrification liquid refluxing from aerobic biochemical pool, water outlet gravity flow enters aerobic biochemical pool in anoxic biochemistry pool.The sewage aeration in aerobic biochemical pool coming from anoxic biochemistry pool carries out aerobic biochemical reaction, and a water outlet part is back to anoxic biochemistry pool as nitrification liquid by reflux pump, carries out anti-nitration reaction; Another part is flow automatically and is entered second pond by overflow weir.The sewage coming from aerobic biochemical pool carries out mud-water separation in second pond, and mud deposits concentrated in the sludge bucket of second pond, relies on liquid pressure to enter storage basin by sludge valve.Top clear liquor is flow automatically and is entered clean water basin by overflow weir.Part sludge reflux in storage basin, to hydrolysis acidification pool, is hydrolyzed, and makes residual sludge reduction, increases the settling property of excess sludge simultaneously.Storage basin is spoil disposal regularly, and mud is after dehydration, to afforest with native mode back to nature.
Combined stuffing is all set in anoxic biochemistry pool and aerobic biochemical pool.Combined stuffing is made up of plastics semi soft packing and fiber soft-filler, combines semi soft packing gas distribution, the water distribution advantage that all even soft-filler specific surface area is large, biofilm is fast.
The water outlet coming from second pond flows automatically to clean water basin, then be transported to biological activated carbon reactor with filtration pump, water enters from the bottom of biological activated carbon reactor, the parallel connection of two biological activated carbon reactors, built-in activated carbon, water outlet flows automatically to ozone contact tank by top overflow weir.
The clear water coming from biological activated carbon reactor in ozone contact tank, with the ozone gas producing from ozonizer by sterilizing gas divider in ozone contact tank fully mixing contact, sterilize after up to standard and carry out reuse.Reuse Range is toilet flushing, give the car a wash, greening and landscape water body etc.
The advanced treatment that this device adopts is biological activated carbon reactor, built-in activated carbon, sewage is after traditional second-stage treatment, although most suspended substance and organism have been removed, but go back the suspended solids of residual minim and the nuisance of dissolving, as the compound such as nitrogen and phosphorus.Adopt bottom aeration operation scheme further to remove the compounds such as COD, N, P, make water outlet reach the standard of reuse.Gac can be granular active carbon and columnar activated carbon, preferred particulates shaped activated carbon.
The sterilizing agent that this device adopts is ozone, and ozone is a kind of strong oxidizer, can act on rapidly with most of organism in waste water and microorganism, to deodorizing, decolouring, sterilization, except phenol, cyanogen, iron, manganese, reduction COD, BOD 5deng thering is significant effect.
Beneficial effect of the present invention: (1) is simple to operate, and maintenance cost is low, more easily realizes automatic operating; (2) treatment effect is stable, and sludge output is few, and excess sludge adopts the treatment process of back to nature to be used for afforesting with soil.(3) good with environment compatibility, sewage after treatment can reuse landscape water and greening water.Not only save a large amount of effluent charge, reduce again environmental pollution, there is higher economic benefit and environmental benefit.
Brief description of the drawings
Fig. 1 process flow diagram.
Embodiment
Embodiment 1
Certain sanatorium's waste water quality, in table 1, adopts Fig. 1 process flow system of the present invention to process, and result is as shown in table 1.
Certain sanatorium's sewage quality feature of table 1 and treatment effect (mg/L)
Embodiment 2
Certain hotel's food and drink waste water, it is processed front water-quality guideline and processes rear outlet effect in table 2.
Certain hotel's food and drink waste water sewage quality feature of table 2 and treatment effect (mg/L)
Embodiment 3
Certain tourism and resort zone food and drink waste water, it is processed front water-quality guideline and processes rear outlet effect in table 3.
Certain tourism and resort zone food and drink waste water water quality characteristic of table 3 and treatment effect (mg/L)

Claims (5)

1. a sewage water treatment method, is characterized in that:
First sanitary sewage through structures septic tank enters oil trap after mechanical grille coarse filtration, then enters hydrolysis acidification pool;
At hydrolysis acidification pool, the larger molecular organics in sewage is decomposed into small organic molecule, remove part COD;
Sewage rises to preliminary sedimentation tank by inlet water lifting pumps in hydrolysis acidification pool, carries out mud-water separation, and mud deposits concentrated in sludge bucket, relies on liquid pressure to enter storage basin by sludge valve; Top clear liquor is flow automatically and is entered anoxic biochemistry pool by overflow weir; , there is anti-nitration reaction in the sewage coming from preliminary sedimentation tank and the nitrification liquid refluxing from aerobic biochemical pool, water outlet gravity flow enters aerobic biochemical pool in anoxic biochemistry pool;
The sewage aeration in aerobic biochemical pool coming from anoxic biochemistry pool carries out aerobic biochemical reaction, and a water outlet part is back to anoxic biochemistry pool as nitrification liquid by reflux pump, carries out anti-nitration reaction; Another part is flow automatically and is entered second pond by overflow weir;
The sewage coming from aerobic biochemical pool carries out mud-water separation in second pond, and mud deposits concentrated in the sludge bucket of second pond, relies on liquid pressure to enter storage basin by sludge valve, and top clear liquor is flow automatically and entered clean water basin by overflow weir;
Part sludge reflux in storage basin, to hydrolysis acidification pool, is hydrolyzed, and mud is after dehydration, to afforest with native mode back to nature;
The water outlet coming from second pond flows automatically to clean water basin, then be transported to biological activated carbon reactor with filtration pump, water enters from the bottom of biological activated carbon reactor, the parallel connection of two biological activated carbon reactors, built-in gac, water outlet flows automatically to ozone contact tank by top overflow weir;
The clear water coming from biological activated carbon reactor in ozone contact tank, with the ozone gas producing from ozonizer by sterilizing gas divider in ozone contact tank fully mixing contact, sterilize after up to standard and carry out reuse.
2. method according to claim 1, is characterized in that: at the bottom of hydrolysis acidification pool, be provided with perforated pipe aerating regulation device, pass into air, prevent sludgd deposition, homogenizing water quality and preaeration; In hydrolysis acidification pool, be provided with combined stuffing, combined stuffing is made up of plastics semi soft packing and fiber soft-filler, by microbial process, plays acidication effect.
3. method according to claim 1, is characterized in that: built-in combined stuffing in anoxic biochemistry pool, combined stuffing is made up of plastics semi soft packing and fiber soft-filler.
4. method according to claim 1, is characterized in that: built-in combined stuffing in aerobic biochemical pool, combined stuffing is made up of plastics semi soft packing and fiber soft-filler.
5. method according to claim 1, is characterized in that: the built-in gac of biological activated carbon reactor, and bottom adopts aeration operation scheme, and gac is granular active carbon and columnar activated carbon.
CN201210178195.XA 2012-06-01 2012-06-01 Sewage treatment method Active CN103449658B (en)

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CN104193111B (en) * 2014-09-17 2015-11-18 福建隆上超纤有限公司 A kind of leatheroid method of wastewater treatment
CN104445837A (en) * 2014-12-25 2015-03-25 北京桑德环境工程有限公司 Industrial combined wastewater bio-augmentation treatment system and method
CN104944683B (en) * 2015-05-26 2017-08-25 浦华环保有限公司 The processing system and processing method of a kind of slaughtering wastewater
CN105906151A (en) * 2016-06-08 2016-08-31 浙江省环境保护科学设计研究院 Sewage treatment device and method of high-density biochemical system in combination with activated carbon filtration system
CN106007219A (en) * 2016-07-12 2016-10-12 佛山杰致信息科技有限公司 Comprehensive sewage treatment process
CN106219905A (en) * 2016-09-18 2016-12-14 云南圣清环保科技有限公司 A kind of Wastewater Treatment in Expressway Service Center technique
CN106242199A (en) * 2016-10-31 2016-12-21 天津艾杰环保技术工程有限公司 A kind of dispersant type domestic wastewater regeneration equipment
CN106430845A (en) * 2016-11-21 2017-02-22 中机国际工程设计研究院有限责任公司 Kitchen garbage wastewater treatment apparatus
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CN106527520A (en) * 2016-11-28 2017-03-22 宝德科技集团股份有限公司 Integrated sewage pipe network detection and sewage treatment device and system
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CN107365017A (en) * 2017-07-25 2017-11-21 安徽海东环保科技有限公司 domestic sewage treatment process
CN107265815A (en) * 2017-07-25 2017-10-20 安徽海东环保科技有限公司 Sewage treatment process in septic tank
CN107311396A (en) * 2017-07-25 2017-11-03 安徽海东环保科技有限公司 Heavy oil sewage treatment process
CN107986566A (en) * 2017-12-12 2018-05-04 陈值英 Water conservancy and hydropower environmental project sewage purification treatment equipment
CN109020046A (en) * 2018-06-05 2018-12-18 广东南豆科技有限公司 A kind of intelligent wash bowl with wastewater treatment equipment
CN109320028A (en) * 2018-12-10 2019-02-12 重庆固润科技发展有限公司 The system and method for kitchen garbage and sanitary sewage integration in-situ treatment
CN110372167A (en) * 2019-08-12 2019-10-25 杭州诚洁环保有限公司 A kind of residual sludge reduction technique for A/O technique
CN113060904A (en) * 2021-03-24 2021-07-02 郑州青城环境保护技术有限公司 Efficient full-automatic integrated treatment system for bioengineering sewage

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CN101525202A (en) * 2009-04-14 2009-09-09 东华大学 Advanced dyeing wastewater treatment and reclaimed water reuse system and method thereof
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