CN104609557A - Method for treating slaughter wastewater by using sequencing batch reactor (SBR) activated sludge process - Google Patents

Method for treating slaughter wastewater by using sequencing batch reactor (SBR) activated sludge process Download PDF

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Publication number
CN104609557A
CN104609557A CN201510044515.6A CN201510044515A CN104609557A CN 104609557 A CN104609557 A CN 104609557A CN 201510044515 A CN201510044515 A CN 201510044515A CN 104609557 A CN104609557 A CN 104609557A
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reactor
sbr
active sludge
slaughterhouse wastewater
water
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贾艳萍
张兰河
贾心倩
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Northeast Electric Power University
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Northeast Dianli University
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Abstract

The invention discloses a method for treating slaughter wastewater by using a sequencing batch reactor (SBR) activated sludge process. The method comprises the following specific steps of firstly adding activated sludge into an SBR, then, adding the slaughter wastewater into the reactor, starting up a control device, sequentially aerating, stirring, precipitating, draining and standing in the reactor, and going to a next cycle period after one processing cycle is completed. The method for treating the slaughter wastewater by using the SBR activated sludge process, disclosed by the invention, has a good treatment effect on the slaughter wastewater.

Description

A kind of method utilizing sequencing batch active sludge process slaughterhouse wastewater
Technical field
The present invention relates to technical field of sewage, particularly relate to a kind of method utilizing sequencing batch active sludge process slaughterhouse wastewater.
Background technology
Along with the development of China's economy and the raising of people's living standard, slaughterhouse scale constantly expands, and the quantity discharged of slaughterhouse wastewater increases year by year.According to investigations, China's slaughterhouse wastewater annual emissions is about 2,000,000,000 m 3, account for 6% of national discharged volume of industrial waste water, its pollution level is also in continuous aggravation.Containing the more small organic molecule such as protein, fat, VFA in slaughterhouse wastewater, water body is sorrel and with obvious bad smell, if not treated direct discharge, can causes severe contamination to water surrounding.Therefore, very urgent to the process of slaughterhouse wastewater.Slaughterhouse wastewater treatment method mainly comprises Physical, chemical method and biological process, and biological process, due to its economy and low to the hazardness of environment, is subject to the extensive concern of investigator.Coagulant sedimentation is the one of method of chemical treatment, mainly utilizes coagulating agent to carry out pre-treatment to water quality, the pollutent in waste water and managed by thing between coagulating agent and inhale attached ﹑ chemisorption and ion-exchange absorption etc. and remove impurity.Sequencing batch active sludge (Sequencing BatchReactor Activated SludgeProcess, SBR) be one in biological treatment, develop as far back as 1914 and come into operation, SBR adopts the mode of intermittent aeration to run, a kind of simple, anti impulsion load, efficient quick and the sewage disposal technology of low power consuming, by aeration time and the churning time of manual control SBR different steps, sbr reactor pond is made to have possessed aerobic and anaerobic environment condition needed for Microbial denitrogenation, thus reach the object of denitrogenation, have very important significance at water treatment field tool.
Table 1 certain slaughterhouse's waste water quality and discharge index
The feature of slaughterhouse wastewater mainly contain following some: the change of (1) water quality, the water yield is greatly.Because the discharge of slaughterhouse wastewater mainly concentrates on night, namely night is draining peak period, and daytime is relatively less; (2) turbidity of wastewater is large, and solid suspension substrate concentration is high, and with unpleasant bad smell; (3) slaughterhouse wastewater belongs to typical high concentrated organic wastewater, and COD concentration is generally 1500-3800mg/L (as shown in table 1), most Gao Shikeda 6500mg/L, good biodegradability, and water quality is nutritious, very suitable micro-organisms flourish; (4) slaughterhouse wastewater color is sorrel, and containing pollutents such as a large amount of fat, blood, internal organ detritus, hair and ight soil, fat content is high.If slaughterhouse wastewater is outer row directly, the nutritive substance in water and stomach germ and parasitic ovum etc., can cause severe contamination to surface water, underground water.When the microbial decomposition organism in slaughterhouse wastewater and suspended substance, need a large amount of dissolved oxygens, cause water quality deterioration, impact life water of productive use normally.
The Technical comparing that China's applying biological method carries out water treatment is ripe.Because slaughterhouse wastewater contains high concentration N, phosphorus, BOD 5/ COD is greater than 5 (specific targets are as shown in table 1), and biodegradability is good, and therefore biological treatment is occupied an leading position.Current biological process, mainly based on Aerobic biological process method, comprises activated sludge process, oxidation ditch, acidication etc.Common anaerobic digestion is at first in the widespread use of Australia of the U.S., and China starts to occur the techniques such as anaerobic active sludge system (ASBR), anaerobic baffled bed bioreactor (ABR), up-flow anaerobic sludge blanket (UASB) afterwards.Anaerobic technique treatment effect comparatively aerobic process is more efficient, but cost is higher.Therefore, how efficiently processing the concern that slaughterhouse wastewater has caused numerous scholars, nearly decades, many scholars adopted combination process process slaughterhouse wastewater, and started promotion and application in actual slaughterhouse, occupied an leading position gradually in process slaughterhouse wastewater field.
The each loop cycle of SBR technique is divided into fill phase, aeration phase, subsidence stage, bleeding stage, idle stage, is the typical process function such as water inlet, biology aerobic anaerobism, precipitation being combined in a pond.First, waste water is injected sbr reactor device, utilize the air pump at the bottom of pond to carry out aeration and stir companion, by the high-concentration activated sludge Homogeneous phase mixing at the bottom of waste water and pond, reduce influent concentration, serve the effect of equalizing tank, resist because water quality and the water yield change the load impact caused, the microorganism in system carries out adsorb organic compound effect; After having intake, system starts to carry out operation, and by the oxygen of microorganism abundance in aeration supply pool, microorganism carries out metabolism, starts degradation of organic substances gradually, and aeration time and aeration intensity are selected according to different processing intents; By mixed solution quiescent setting for some time after stopping aeration, the effect of second pond is played in sbr reactor pond, and the dissolved oxygen in water reduces gradually, when dissolved oxygen reaches low concentration, anaerobic reaction is also carrying out, and the setting of sedimentation time, primarily of processing requirements and sewage type set, is generally 1h ~ 2h; Static complete after discharge supernatant liquor, remaining muddy water can as the dilution water of next treatment cycle and recirculated water; Finally, during the place's idle state of SBR pond, because microorganism carries out endogenous respiration, the dissolved oxygen concentration around it continues to decline, and the remaining nitrogen in reaction tank continues to remove through denitrification.In new cycle of operation water inlet process, the microorganism in active sludge owing to being in starvation, thus improves the ability of its adsorb organic compound.
Summary of the invention
The invention provides a kind of method utilizing sequencing batch active sludge process slaughterhouse wastewater.
The present invention adopts following technical scheme:
The concrete steps of the method for sequencing batch active sludge process slaughterhouse wastewater that utilize of the present invention are as follows:
First active sludge is added in sbr reactor device, then slaughterhouse wastewater is joined in reactor, start control device, carry out aeration, stirring, precipitation, draining successively in the reactor and leave unused, after a treatment cycle completes, entering into next loop cycle; Reactor is by top instant water coming-in, the gas that air pump is confessed by the micro porous aeration head at the bottom of pond to gas distribution in reactor, air demand is undertaken regulating (aeration control is at 15 ~ 25L/h) by spinner-type flowmeter, the gas distribution time is about 5-6h, i.e. aeration phase, anaerobism agitation phases afterwards carries out 2h by agitator, after precipitation 1h, to be drained supernatant liquor by water port, enter lay-up period; The whole sbr reactor cycle is controlled working time in each stage by the time relay; Temperature of reactor controls 30 ~
35 DEG C, it be 6.0 ~ 8.5, sludge concentration MLSS is 2000 ~ 3500mg/L that dissolved oxygen DO controls at 1.5 ~ 2.0mg/L, pH.
Active sludge carries out domestication before use in advance and cultivates, concrete grammar is as follows: first expose to the sun mud sky 24h, after this, carry out domestication by sbr reactor device to cultivate, each cycle adds finite concentration gradient (10%, 20%, 30% ... 90%, 100%, increase progressively 10% at every turn,) slaughterhouse wastewater 2L, for improving domestication speed, ran for two cycles every day, periodic duty is: water inlet → aeration 5h → stirring 2h → sedimentation 1h → draining; Water temperature controls at 30 DEG C, and through cultivating and domestication, mud color changes to tawny by black gradually, and water outlet is become limpid from muddiness, and microorganism has adapted to system environment condition gradually, achieves the steady growth of mud; When water outlet COD, total nitrogen concentration are stablized, show that sludge acclimatization is ripe.
Control COD/NH in sbr reactor device 4 +the ratio of-N is 6-7.
When carbon source content is lower than 80mg/L in sbr reactor device, adds 50ml pre fermentation waste water as carbon source, make carbon source content be more than or equal to 80mg/L.
Described active sludge takes from the second pond of sewage work.
Be provided with agitator in described sbr reactor device, bottom is provided with aerator, and aerator is connected with the under meter be positioned on reactor outer wall; Sbr reactor device outer wall is provided with thief hole; Mud discharging mouth is provided with bottom sbr reactor device; DO sensor, pH sensor, ORP sensor, temperature sensor is equipped with in sbr reactor device; DO sensor is connected with the dissolved oxygen instrument outside reactor; PH sensor is connected with the pH instrument outside reactor; ORP sensor is connected with the redox potential outside reactor; Temperature sensor is connected with the thermometer outside reactor.
Positively effect of the present invention is as follows:
(1) simple, the less investment of technique.Major equipment is few, sbr reactor pond by respond and be dissolved in a pond, do not need too much structures, as equalizing tank, second pond and sludge recirculation system, treatment system structural arrangement is compact, and structures floor space is little, saves construction investment.
(2) anti impulsion load ability is strong, good denitrogenation and dephosphorization effect.SBR process reactor is textural remains complete hybrid-type feature, but considers that SBR process treatment process belongs to desirable pulling flow type process from the time.The fluctuation of SBR technology utilization height cycling rate opposing water quality and the water yield, makes it have the feature that anti impulsion load ability is strong.It can realize aerobic, anoxic and anaerobic stages alternately, by arranging operation sequence to realize aerobic nitrification and to absorb phosphorus, the optimal environmental condition of anaerobic denitrifying denitrogenation and release phosphorus.By regulating aeration rate, reaction times, the suction phosphorus process of the nitration reaction of aerobic stage and polyP bacteria can be made to complete smoothly.Certainly, at the anoxic phases without aeration, water inlet can be provided as electron donor organic carbon source or high sludge concentration can impel denitrification process to complete smoothly quickly, and dephosphorization bacterium fully discharges phosphorus under anaerobic state is stirred in water inlet.
(3) react impellent large, processing efficiency is high.In reactor operational process, substrate concn along with biochemical reaction carrying out from high to low, namely define a plug-flow state in time.Desirable pulling flow type process makes biochemical reaction impellent maximum, and contaminant removal efficiency also reaches maximization.
(4) sludge settling is good.Because SBR technique has ideal plug flow formula feature, between the reaction period, thread fungus is suppressed greatly due to hocket anoxic (or anaerobism) and good oxygen condition and concentration of substrate gradient of water inlet and step of reaction, thread fungus can not amount reproduction, therefore, when most microorganism can not be affected, effectively sludge bulking is prevented.
(5) flexible operation, high automation.SBR treatment system can pass through each stage procedure of sequential control, and realize automatically controlling and monitoring by programmable logic controller (PLC), for realizing the change of different quality, water yield processing requirements, solved by the suitable adjustment of operating parameter.Therefore, SBR art breading city domestic sewage and trade effluent is utilized to have wide promotion prospect.
(6) treatment effect of method to slaughterhouse wastewater of sequencing batch active sludge process slaughterhouse wastewater that utilize of the present invention is as shown in table 2:
Table 2
Accompanying drawing explanation
Fig. 1 is the structural representation of the sbr reactor device that method of the present invention uses.
1. redox potential; 2. dissolved oxygen instrument; 3.DO sensor; 4.pH sensor; 5.ORP sensor; 6. temperature sensor; 7.pH instrument; 8. thermometer; 9. agitator; 10. aerator; 11. thief holes; 12. mud discharging mouths; 13. under meters.
Embodiment
The following examples describe in further detail of the present invention.
As shown in Figure 1, the structure of the sbr reactor device that the present invention is used is as follows: be provided with agitator 9 in sbr reactor device, bottom is provided with aerator 10, and aerator 10 is connected with the under meter 13 be positioned on reactor outer wall; Sbr reactor device outer wall is provided with thief hole 11; Mud discharging mouth 12 is provided with bottom sbr reactor device; DO sensor 3, pH sensor 4, ORP sensor 5, temperature sensor 6 is equipped with in sbr reactor device; DO sensor 3 is connected with the dissolved oxygen instrument 2 outside reactor; PH sensor 4 is connected with the pH instrument 7 outside reactor; ORP sensor 5 is connected with the redox potential 1 outside reactor; Temperature sensor 6 is connected with the thermometer 8 outside reactor.
The concrete steps of the method for sequencing batch active sludge process slaughterhouse wastewater that utilize of the present invention are as follows:
First active sludge is added in sbr reactor device, then slaughterhouse wastewater is joined in reactor, start control device, carry out aeration, stirring, precipitation, draining successively in the reactor and leave unused, after a treatment cycle completes, entering into next loop cycle; Reactor is by top instant water coming-in, the gas that air pump is confessed by the micro porous aeration head at the bottom of pond to gas distribution in reactor, air demand is undertaken regulating (aeration control is at 15 ~ 25L/h) by spinner-type flowmeter, the gas distribution time is about 5-6h, i.e. aeration phase, anaerobism agitation phases afterwards carries out 2h by agitator, after precipitation 1h, to be drained supernatant liquor by water port, enter lay-up period; The whole sbr reactor cycle is controlled working time in each stage by the time relay; Temperature of reactor controls at 30 ~ 35 DEG C, and it be 6.0 ~ 8.5, sludge concentration MLSS is 2000 ~ 3500mg/L that dissolved oxygen DO controls at 1.5 ~ 2.0mg/L, pH.
Active sludge carries out domestication before use in advance and cultivates, concrete grammar is as follows: first expose to the sun mud sky 24h, after this, carry out domestication by sbr reactor device to cultivate, each cycle adds finite concentration gradient (10%, 20%, 30% ... 90%, 100%) slaughterhouse wastewater 2L, for improving domestication speed, ran for two cycles every day, periodic duty is: water inlet → aeration 5h → stirring 2h → sedimentation 1h → draining; Water temperature controls at 30 DEG C, and through cultivating and domestication, mud color changes to tawny gradually, and water outlet is become limpid from muddiness, and microorganism has adapted to system environment condition gradually, achieves the steady growth of mud; When water outlet COD, total nitrogen concentration are stablized, show that sludge acclimatization is ripe.
Control COD/NH in sbr reactor device 4 +the ratio of-N is 6-7.
When carbon source content is lower than 80mg/L in sbr reactor device, add 50ml pre fermentation waste water as carbon source.
Described active sludge takes from the second pond of sewage work.
Embodiment 1:
Activated sludge acclimatization stage dissolved oxygen (DO) controls at about 2.0mg/L, and temperature controls at 30 ~ 35 DEG C, and pH is 6.0 ~ 8.5.That progressively improves slaughterhouse wastewater in domestication process adds concentration, until it is 100% that 30d adds concentration, now mud color becomes beige from black, now NH 4 +-N clearance is about 20%.Cultivation again through about 30d is tamed, and mud color progressively becomes tawny, and starts to have good flocculation and settling property, and effluent quality is more clear.Now water outlet NH 4 +-N, COD and PO 4 3--P is respectively 22mg/L, 200mg/L and 10mg/L.
Embodiment 2:
Active sludge through domestication adapts to slaughterhouse wastewater completely.Slaughterhouse wastewater is by sbr reactor device top instant water coming-in, control DO is 1.5 ~ 2.0mg/L, pH is 6.0 ~ 8.5, VFA concentration is about 2000mg/L, sludge concentration MLSS is 2000 ~ 3500mg/L, through the aeration of 5-6h, anaerobism stirs 2h afterwards, precipitation 1h, this stage mainly utilizes nitration denitrification effect to carry out the abundant degraded of pollutent, makes NO3-N accumulation and is converted into N rapidly 2.
Embodiment 3:
Sbr reactor device fully mixes at agitation phases muddy water, is discharged by the water port of reactor through precipitation after date supernatant liquor, most of sludge retention in the reactor for the denitrogenation dephosphorizing of next cycle, with this cycle operation.After process, the NH of sewage 4 +-N clearance can reach 90.7%, COD clearance can reach 85%, PO 4 3--P clearance can reach about 75%.
Water-quality guideline detects
The index measured in experimentation is as shown in table 3.
Index contrast before and after table 3 slaughterhouse wastewater treatment
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalents thereof.

Claims (6)

1. utilize a method for sequencing batch active sludge process slaughterhouse wastewater, it is characterized in that: the concrete steps of described method are as follows:
First active sludge is added in sbr reactor device, then slaughterhouse wastewater is joined in reactor, start control device, carry out aeration, stirring, precipitation, draining successively in the reactor and leave unused, after a treatment cycle completes, entering into next loop cycle; Reactor is by top instant water coming-in, the gas that air pump is confessed by the micro porous aeration head at the bottom of pond to gas distribution in reactor, air demand is regulated by spinner-type flowmeter, aeration control is at 15 ~ 25L/h, and the gas distribution time is about 5-6h, i.e. aeration phase, anaerobism agitation phases afterwards carries out 2h by agitator, after precipitation 1h, to be drained supernatant liquor by water port, enter lay-up period; The whole sbr reactor cycle is controlled working time in each stage by the time relay; Temperature of reactor controls at 30 ~ 35 DEG C, and it be 6.0 ~ 8.5, sludge concentration MLSS is 2000 ~ 3500mg/L that dissolved oxygen DO controls at 1.5 ~ 2.0mg/L, pH.
2. utilize the method for sequencing batch active sludge process slaughterhouse wastewater as claimed in claim 1, it is characterized in that: active sludge carries out domestication before use in advance and cultivates, concrete grammar is as follows: first expose to the sun mud sky 24h, after this, carry out domestication by sbr reactor device to cultivate, each cycle adds the slaughterhouse wastewater 2L of finite concentration gradient, concentration gradient adds fashionable by volume concentration 10%-100%, increase progressively 10% at every turn, for improving domestication speed, ran for two cycles every day, periodic duty is: water inlet → aeration 5h → stirring 2h → sedimentation 1h → draining; Water temperature controls at 30 DEG C, and through cultivating and domestication, mud color changes to tawny gradually, and water outlet is become limpid from muddiness, and microorganism has adapted to system environment condition gradually, achieves the steady growth of mud; When water outlet COD, total nitrogen concentration are stablized, show that sludge acclimatization is ripe.
3. utilize the method for sequencing batch active sludge process slaughterhouse wastewater as claimed in claim 1, it is characterized in that: control COD/NH in sbr reactor device 4 +the ratio of-N is 6-7.
4. utilize the method for sequencing batch active sludge process slaughterhouse wastewater as claimed in claim 1, it is characterized in that: when carbon source content is lower than 80mg/L in sbr reactor device, add pre fermentation waste water as carbon source, make carbon source content be more than or equal to 80mg/L.
5. utilize the method for sequencing batch active sludge process slaughterhouse wastewater as claimed in claim 1, it is characterized in that: described active sludge takes from the second pond of sewage work.
6. utilize the method for sequencing batch active sludge process slaughterhouse wastewater as claimed in claim 1, it is characterized in that: in described sbr reactor device, be provided with agitator (9), bottom is provided with aerator (10), and aerator (10) is connected with the under meter be positioned on reactor outer wall (13); Sbr reactor device outer wall is provided with thief hole (11); Mud discharging mouth (12) is provided with bottom sbr reactor device; DO sensor (3), pH sensor (4), ORP sensor (5), temperature sensor (6) is equipped with in sbr reactor device; DO sensor (3) is connected with the dissolved oxygen instrument (2) outside reactor; PH sensor (4) is connected with the pH instrument (7) outside reactor; ORP sensor (5) is connected with the redox potential (1) outside reactor; Temperature sensor (6) is connected with the thermometer (8) outside reactor.
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CN110330099A (en) * 2019-08-14 2019-10-15 重庆市生态环境科学研究院 A kind of method for culturing aerobic granular sludge and culture apparatus
CN110845002A (en) * 2019-10-30 2020-02-28 桂林理工大学 Method for improving sewage treatment and sludge combustion effects by using pulverized coal activated sludge process
CN110921817A (en) * 2019-11-07 2020-03-27 北京师范大学 SBR (sequencing batch reactor) improvement method for efficiently treating chemical wastewater with low energy consumption
CN111087081A (en) * 2019-12-26 2020-05-01 广东绿巨人环境科技有限公司 Wastewater treatment method and application thereof
CN112408723A (en) * 2020-12-07 2021-02-26 深圳市浩天源环保科技有限公司 Slaughterhouse wastewater treatment method and system
CN112441662A (en) * 2020-12-04 2021-03-05 安徽中环环保科技股份有限公司 Method for quickly starting SBR bioreactor and method for judging successful starting
CN115057523A (en) * 2022-05-06 2022-09-16 湖南英韦尔特环保科技有限公司 SBR wastewater treatment device and treatment method thereof
JP7407634B2 (en) 2020-03-24 2024-01-04 住友重機械エンバイロメント株式会社 Water treatment equipment and water treatment method

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105290104A (en) * 2015-11-25 2016-02-03 西南科技大学 Bioremediation device and method for radioactively contaminated soil
CN106277313A (en) * 2016-07-18 2017-01-04 吉林化工学院 A kind of energy-saving and cost-reducing sequencing batch activated sludge processes technique and device
CN110330099A (en) * 2019-08-14 2019-10-15 重庆市生态环境科学研究院 A kind of method for culturing aerobic granular sludge and culture apparatus
CN110845002A (en) * 2019-10-30 2020-02-28 桂林理工大学 Method for improving sewage treatment and sludge combustion effects by using pulverized coal activated sludge process
CN110845002B (en) * 2019-10-30 2024-02-06 桂林理工大学 Method for improving sewage treatment and sludge combustion effects by coal dust activated sludge process
CN110921817A (en) * 2019-11-07 2020-03-27 北京师范大学 SBR (sequencing batch reactor) improvement method for efficiently treating chemical wastewater with low energy consumption
CN111087081A (en) * 2019-12-26 2020-05-01 广东绿巨人环境科技有限公司 Wastewater treatment method and application thereof
CN111087081B (en) * 2019-12-26 2022-07-08 广东绿巨人环境科技有限公司 Wastewater treatment method and application thereof
JP7407634B2 (en) 2020-03-24 2024-01-04 住友重機械エンバイロメント株式会社 Water treatment equipment and water treatment method
CN112441662A (en) * 2020-12-04 2021-03-05 安徽中环环保科技股份有限公司 Method for quickly starting SBR bioreactor and method for judging successful starting
CN112408723A (en) * 2020-12-07 2021-02-26 深圳市浩天源环保科技有限公司 Slaughterhouse wastewater treatment method and system
CN115057523A (en) * 2022-05-06 2022-09-16 湖南英韦尔特环保科技有限公司 SBR wastewater treatment device and treatment method thereof

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