CN103964646A - Method for anaerobic-aerobiotic-microbial flocculation reinforced wastewater treatment - Google Patents

Method for anaerobic-aerobiotic-microbial flocculation reinforced wastewater treatment Download PDF

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CN103964646A
CN103964646A CN201410213250.3A CN201410213250A CN103964646A CN 103964646 A CN103964646 A CN 103964646A CN 201410213250 A CN201410213250 A CN 201410213250A CN 103964646 A CN103964646 A CN 103964646A
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attapulgite
waste water
anaerobic
water
tank
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CN103964646B (en
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耿金菊
任洪强
许柯
丁丽丽
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Nanjing University
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Nanjing University
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Abstract

The invention discloses a method for anaerobic-aerobiotic-microbial flocculation reinforced wastewater treatment. The method comprises the following steps of: 1) treating the wastewater to be treated in a regulation tank; 2) removing large floating matters and impurities out of the wastewater (treated in the regulation tank) by a grating device; 3) pumping the effluent obtained in the step 2) in a quick mixing tank, and adding a flocculant PAC (poly aluminium chloride) in the quick mixing tank and carrying out flocculation pre-precipitate; 4) carrying out anaerobic-aerobiotic treatment; 5) feeding the water body in a secondary sedimentation tank and adding 7.5vol% of a microbial flocculation agent and 5vol% of CaCl2 solution with a concentration of 1-1.5%, mixing for 8-10 minutes and then enabling the liquid to pass through a high-performance ceramic filter material with a particle size of 3-5mm and a quartz sand cushion laid on the bottom of the high-performance ceramic filter material; and 6) feeding the effluent obtained in the step 5) in an attapulgite adsorption tank for further adsorption bleaching, removing micropollutants, and disinfecting the effluent, wherein attapulgite is arranged in the attapulgite adsorption tank, a Pt metal screen is arranged on the attapulgite, and the attapulgite is loaded with Fe2O3 or CuO and NaCl; and finally draining water in a water collection tank.

Description

The method of a kind of anaerobic-aerobic-microorganism flocculation intensive treatment waste water
Technical field
The invention belongs to field of waste water treatment, be specifically related to a kind of novel method of anaerobic-aerobic-biofloculation intensive treatment waste water.
Background technology
Along with the fast development of China's rural and urban industry, trade effluent content in municipal wastewater is more and more higher, the trade effluent content of the sewage work of a lot of Industry Development Areas or Economy Garden exceedes 80%, the biodegradability extreme difference of sewage, the difficulty of sewage disposal is increasing, processing cost is more and more higher, but water outlet still cannot meet the emission standard of national compulsory.Traditional active sludge treatment process cannot meet current increasingly strict municipal wastewater qualified discharge requirement completely.
Wherein, in high concentrated organic wastewater, ammonia-nitrogen content and COD are very high, denitrification process carbon source deficiency, COD can be up to standard often to adopt conventional process pattern, total nitrogen is difficult to up to standard, and in waste water, contain a large amount of not suspended particle, the solvability microbial products etc. of free settling, be difficult for being removed also not readily biodegradable.Method of wastewater treatment of the prior art all can not meet the requirement of removing above-mentioned substance and content completely, has brought obstruction to wastewater treatment and recycling.
Summary of the invention
The present invention is in order to overcome deficiency of the prior art, the method of a kind of anaerobic-aerobic-microorganism flocculation intensive treatment waste water is provided, can effectively remove ammonia nitrogen, suspended particle, solvability microbial product, micro-contaminant trace species etc., and make effluent quality reach reuse water water quality requirement.
For achieving the above object, the present invention has adopted following technical scheme: a kind of method with anaerobic-aerobic-microorganism flocculation intensive treatment waste water, is characterized in that comprising the following steps:
1) first pending waste water enter equalizing tank, aeration tube is set pending waste water is carried out to preaeration, and aeration intensity is 160～170m 3/ (hm 2), making pending waste water mix and regulate its pH value is 7～8;
2) will in equalizing tank, by grid device, remove larger floating matter and impurity in waste water by waste water after treatment;
3) by 2) water outlet pump in fast mixed pond, in fast mixed pond, add the flocculation agent PAC preliminary precipitation of flocculating, the best feed rate of flocculation agent PAC is 180～190mg/L, with the speed rapid stirring 5min of 220r/min, then with the speed low rate mixing 15min of 80r/min, stop afterwards stirring and standing 30min, flocculate precipitate is rationally discharged and supernatant liquor is pumped in anaerobic biochemical reactor;
4) in anaerobic biochemical reactor, carry out anaerobic biological processing, water body after treatment enters in aerobic biochemical reactor, carries out aerobic treatment;
5) enter and in second pond, add the CaCl that the microbial flocculant of 7.5% volume and the concentration of 5% volume are 1～1.5% through above-mentioned treated water body 2solution, makes the high-performance modified ceramic filter material that liquid is 3～5mm by particle diameter and the quartz sand thickness that is laid on its bottom again after mixing 8～10min;
6) step 5) water outlet introducing attapulgite adsorption tank, further adsorption bleaching, removes micropollutant, disinfection of effluent, described attapulgite adsorption tank is provided with attapulgite, Pt wire netting is set on this attapulgite, and appendix has Fe 2o 3or CuO and NaCl; Finally water is entered in water collecting basin.
Preferably, step 1) in aeration intensity be 165m 3/ (hm 2).
In above-mentioned arbitrary scheme preferably, step 2) in attapulgite can replace with polyurethane foam.
In above-mentioned arbitrary scheme preferably, step 3) and 4) in anaerobic biochemical reactor can adopt CGSB (EGSB) or up flow anaerobic sludge blanket reactor (UASB) or internal-circulation anaerobic reactor (IC).
In above-mentioned arbitrary scheme preferably, step 4) in aerobic biochemical reactor can adopt BAF (BAF) or sbr reactor device or moving-bed membrane bioreactor (MBBR).
Described microbial flocculant is chosen the mixture of rhodococcus erythropolis and Rhodococcus as fermented bacterium, and blending ratio is volume ratio 1: 1;
Substratum is: glucose 10g/L (or uronic acid 10g/L, or ethanol 10g/L or sorbyl alcohol 10g/L or N.F,USP MANNITOL 10g/L), ammonium sulfate 0.5g/L, yeast extract paste 2g/L, K 2hPO 42g/L, MgSO 40.5g/L, NaCl0.5g/L, vitamins C 0.1g/L;
Culture condition is: pH value 7.0-7.2, and shaking speed 130r/min, cultivates 72h for 25-26 DEG C; Described microbial flocculant to the flocculating rate of kaolinic suspension higher than 90%.
Uronic acid, ethanol, sorbyl alcohol and N.F,USP MANNITOL, as the carbon source of Rhodococcus fermention medium, can reduce costs substratum, improve the activity of flocculation agent.
The described method with microbial flocculant processing waste water, step 2) in attapulgite (commercially available) be the attapulgite plate of template, described attapulgite plate is taking attapulgite, flyash, carbosphere as main raw material, taking clay as binding agent, taking cement expansive material as swelling agent, the parts by weight of the weighing scale of its each component are: attapulgite 50-70 part, and flyash 30-60 part, carbosphere 20-45 part, clay are that 5-8 part, cement expansive material are 1-3 part; Described said components is squeezed into template after mixing according to the above ratio.This template lightweight attapulgite plate, its loose volume weight 551kg/m 3left and right, particle unit weight 100kg/m 3left and right, water-intake rate 48.44% left and right, hydrochloric acid soluble rate 0.24% left and right, this lightweight attapulgite can reach the specification of quality of material for water treatment.
Described carbosphere can be commercially available common carbosphere, for example carbonaceous mesophase spherules.
Described anaerobic-aerobic--the method for microorganism flocculation intensive treatment waste water, described step 2) in attapulgite can replace with foamed metal.
Described anaerobic-aerobic--the method for microorganism flocculation intensive treatment waste water, when described step 2) in attapulgite while replacing with foamed metal, described foamed metal adopts electrochemical plating preparation.
The invention has the beneficial effects as follows:
1. equalizing tank is provided with aeration tube waste water is carried out to preaeration, both can homogenizing water quality, can ensure that again particulate matter does not deposit in equalizing tank.And regulate the reasonable pH value of pending waste water, and being conducive to microbial flocculant and adsorbing colloidal solid by electrical neutralization, its molecular chain fully stretches simultaneously, is also conducive to bridge linking effect.
2. can remove larger floating matter by grid device.
3. suspended substance and the colloidalmaterial in former water can be effectively removed in the pre-treatment of flocculating.
4. anaerobic biological processing can be decomposed into short chain, small organic molecule by the long-chain in waste water, larger molecular organics, improves the biodegradability of waste water, and can denitrification denitrogenation; Aerobic treatment further reduces BOD, the COD of waste water, and is absorbable nitrate or nitrite the mineralized nitrogen in waste water, is back to anaerobism section and carries out denitrification denitrogenation, eliminates the peculiar smell of waste water simultaneously.
5. the microbial flocculant of proper ratio and CaCl 2solution can efficiently be removed biochemical treatment and go out the pollution substances such as underwater micro-organic matter, ammonia nitrogen, SMP, reduces water body chroma and turbidity, makes water outlet qualified discharge or middle water reuse.
6. waste water is by being provided with Pt wire netting appendix Fe 2o 3or the high chemically inert attapulgite of the physical strength of CuO and NaCl, can effectively decolour, absorption micropollutant, pathogenic microbe killing, improves effluent quality.
The present invention is integrated in one multiple materialization, the biochemical methods such as detest-aerobic treatment, microorganism flocculation, forms efficient strengthening materialization, biochemical treatment integrated technology, can make organic pollution materials in sewage thoroughly be degraded, and water outlet can qualified discharge or cycling and reutilization.
Embodiment
In order to understand better the present invention, describe in detail below according to the preferred embodiment of the method with anaerobic-aerobic-microorganism flocculation intensive treatment waste water of the present invention.
Embodiment 1
1) first pending laboratory simulation waste water enter equalizing tank, aeration tube is set pending waste water is carried out to preaeration, and aeration intensity is 160m 3/ (hm 3), adopting poling aeration mode, every aeration tube is made up of 3 groups of 45 ° of pores, and making pending waste water mix and regulate its pH value is 6～8;
2) waste water of handling is passed through to grid device in equalizing tank, remove larger floating matter and impurity in waste water;
3) by 2) water outlet pump in fast mixed pond, in fast mixed pond, add the flocculation agent PAC preliminary precipitation of flocculating, effectively to remove suspended substance and the colloidalmaterial in former water, the best feed rate of flocculation agent PAC is 180mg/L, with the speed rapid stirring 5min of 220r/min, then with the speed low rate mixing 15min of 80r/min, stop afterwards stirring and standing 30min, flocculate precipitate is rationally discharged and supernatant liquor is pumped in internal-circulation anaerobic reactor (IC);
4) in internal-circulation anaerobic reactor (IC), carry out anaerobic biological processing, water body after treatment joins aerobic aeration pond, carries out aerobic treatment;
5) enter and in second pond, add the CaCl that the microbial flocculant of 7.5% volume and the concentration of 5% volume are 1% through above-mentioned treated water body 2solution, makes the high-performance modified ceramic filter material that liquid is 3～5mm by particle diameter and the quartz sand thickness that is laid on its bottom again after mixing 8min;
6) last, above-mentioned water outlet after treatment, by the high chemically inert attapulgite of physical strength, Pt wire netting is set on this attapulgite, and appendix is had to Fe 2o 3or CuO and NaCl, further adsorption bleaching, removes micropollutant, and disinfection of effluent, finally enters water in water collecting basin.
Effect before and after processing is as shown in table 1.
Table 1
Embodiment 2
1) first pending laboratory simulation waste water enter equalizing tank, aeration tube is set pending waste water is carried out to preaeration, and aeration intensity is 165m 3/ (hm 3), adopting poling aeration mode, every aeration tube is made up of 3 groups of 45 ° of pores, and making pending waste water mix and regulate its pH value is 6～8;
2) waste water of handling is passed through to grid device in equalizing tank, remove larger floating matter and impurity in waste water;
3) by 2) water outlet pump in fast mixed pond, in fast mixed pond, add the flocculation agent PAC preliminary precipitation of flocculating, effectively to remove suspended substance and the colloidalmaterial in former water, the best feed rate of flocculation agent PAC is 185mg/L, with the speed rapid stirring 5min of 220r/min, then with the speed low rate mixing 15min of 80r/min, stop afterwards stirring and standing 30min, flocculate precipitate is rationally discharged and supernatant liquor is pumped in anaerobe rotating disk (ARBC);
4) in anaerobe rotating disk (ARBC), carry out anaerobic biological processing, water body after treatment joins in aerobic biological fluid-bed and carries out aerobic treatment;
5) enter and in second pond, add the CaCl that the microbial flocculant of 7.5% volume and the concentration of 5% volume are 1.25% through above-mentioned treated water body 2solution, makes the high-performance modified ceramic filter material that liquid is 3～5mm by particle diameter and the quartz sand thickness that is laid on its bottom again after mixing 9min;
6) last, above-mentioned water outlet after treatment, by the high chemically inert polyurethane foam of physical strength, Pt wire netting is set in this polyurethane foam, and appendix is had to Fe 2o 3or CuO and NaCl, further adsorption bleaching, removes micropollutant, and disinfection of effluent, finally enters water in water collecting basin.
Effect before and after processing is as shown in table 2.
Table 2
Embodiment 3
1) first pending waste water enter equalizing tank, aeration tube is set pending waste water is carried out to preaeration, and aeration intensity is 170m 3/ (hm 3), adopting poling aeration mode, every aeration tube is made up of 3 groups of 45 ° of pores, and making pending waste water mix and regulate its pH value is 6～8;
2) waste water of handling is passed through to grid device in equalizing tank, remove larger floating matter and impurity in waste water;
3) by 2) water outlet pump in fast mixed pond, in fast mixed pond, add the flocculation agent PAC preliminary precipitation of flocculating, effectively to remove suspended substance and the colloidalmaterial in former water, the best feed rate of flocculation agent PAC is 190mg/L, with the speed rapid stirring 5min of 220r/min, then with the speed low rate mixing 15min of 80r/min, stop afterwards stirring and standing 30min, flocculate precipitate is rationally discharged and supernatant liquor is pumped in anaerobic baffled reactor (ABR);
4) in anaerobic baffled reactor (ABR), carry out anaerobic biological processing, water body after treatment joins in aerobic biofilter, carries out the aerobic treatment of 10hr at 38 DEG C;
5) last, enter through above-mentioned treated water body the CaCl that the concentration of microbial flocculant 5% volume that adds 7.5% volume in second pond is 1.5% 2solution, makes the high-performance modified ceramic filter material that liquid is 5mm by particle diameter and the quartz sand thickness that is laid on its bottom again after mixing 10min, finally water is entered in water collecting basin;
6) last, above-mentioned water outlet, by the high chemically inert polyurethane foam of physical strength, Pt wire netting is set in this polyurethane foam, and appendix is had to Fe 2o 3or CuO and NaCl, further adsorption bleaching, removes micropollutant, and disinfection of effluent, finally enters water in water collecting basin.
Effect before and after wastewater treatment is as shown in table 3.
table 3
Method control in above-described embodiment all can be carried out full automatic control by control circuit by central processing unit, makes whole method of wastewater treatment remain stable, efficient treatment effect.
The invention has the beneficial effects as follows:
1. equalizing tank is provided with aeration tube waste water is carried out to preaeration, both can homogenizing water quality, can ensure that again particulate matter does not deposit in equalizing tank.And regulate the reasonable pH value of pending waste water, and being conducive to microbial flocculant and adsorbing colloidal solid by electrical neutralization, its molecular chain fully stretches simultaneously, is also conducive to bridge linking effect.
2. can remove larger floating matter by grid device.
3. suspended substance and the colloidalmaterial in former water can be effectively removed in the pre-treatment of flocculating.
4. anaerobic biological processing can be decomposed into short chain, small organic molecule by the long-chain in waste water, larger molecular organics, improves the biodegradability of waste water; Aerobic treatment further reduces BOD, the COD of waste water, and is absorbable nitrate or nitrite the mineralized nitrogen in waste water, eliminates the peculiar smell of waste water simultaneously.
5. waste water is by being provided with Pt wire netting appendix Fe 2o 3or the high chemically inert attapulgite of the physical strength of CuO and NaCl, can effectively decolour, absorption micropollutant, pathogenic microbe killing, improves effluent quality.
The present invention is integrated in one multiple materialization, the biochemical methods such as anaerobic-aerobic processing, microorganism flocculation, forms efficient strengthening materialization, biochemical treatment integrated technology, can make organic pollution materials in sewage thoroughly be degraded, and water outlet can qualified discharge.
The numerical range relating in the embodiment of being described herein is all through many experiments gained, each point can be realized, the above, it is only preferred embodiment of the present invention, be not the restriction of the present invention being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.

Claims (8)

1. by a method for anaerobic-aerobic-microorganism flocculation intensive treatment waste water, it is characterized in that comprising the following steps:
1) first pending waste water enter equalizing tank, aeration tube is set pending waste water is carried out to preaeration, and aeration intensity is 160～170m 3/ (hm 2), making pending waste water mix and regulate its pH value is 7～8;
2) will in equalizing tank, by grid device, remove larger floating matter and impurity in waste water by waste water after treatment;
3) by 2) water outlet pump in fast mixed pond, in fast mixed pond, add the flocculation agent PAC preliminary precipitation of flocculating, the best feed rate of flocculation agent PAC is 180～190mg/L, with the speed rapid stirring 5min of 220r/min, then with the speed low rate mixing 15min of 80r/min, stop afterwards stirring and standing 30min, flocculate precipitate is rationally discharged and supernatant liquor is pumped in anaerobic biochemical reactor;
4) in anaerobic biochemical reactor, carry out anaerobic biological processing, water body after treatment enters in aerobic biochemical reactor, carries out aerobic treatment;
5) enter and in second pond, add the CaCl that the microbial flocculant of 7.5% volume and the concentration of 5% volume are 1～1.5% through above-mentioned treated water body 2solution, makes the high-performance modified ceramic filter material that liquid is 3～5mm by particle diameter and the quartz sand thickness that is laid on its bottom again after mixing 8～10min;
6) step 5) water outlet introducing attapulgite adsorption tank, further adsorption bleaching, removes micropollutant, disinfection of effluent, described attapulgite adsorption tank is provided with attapulgite, Pt wire netting is set on this attapulgite, and appendix has Fe 2o 3or CuO and NaCl; Finally water is entered in water collecting basin.
2. the method for processing waste water with microbial flocculant according to claim 1, is characterized in that: described microbial flocculant is chosen the mixture of rhodococcus erythropolis and Rhodococcus as fermented bacterium, and blending ratio is volume ratio 1: 1;
Substratum is: glucose 10g/L (or uronic acid 10g/L, or ethanol 10g/L or sorbyl alcohol 10g/L or N.F,USP MANNITOL 10g/L), ammonium sulfate 0.5g/L, yeast extract paste 2g/L, K 2hPO 42g/L, MgSO 40.5g/L, NaCl0.5g/L, vitamins C 0.1g/L;
Culture condition is: pH value 7.0-7.2, and shaking speed 125r/min, cultivates 72-75h for 25-26 DEG C; Described microbial flocculant to the flocculating rate of kaolinic suspension higher than 90%.
3. according to claim 1ly process the method for waste water with microbial flocculant, it is characterized in that: step 1) in aeration intensity be 165m 3/ (hm 2).
4. according to claim 1 and 2ly process the method for waste water with microbial flocculant, it is characterized in that: step 6) in attapulgite can replace with polyurethane foam.
5. according to claim 1ly process the method for waste water with microbial flocculant, it is characterized in that: step 3) and 4) in anaerobic biochemical reactor can adopt CGSB (EGSB) or up flow anaerobic sludge blanket reactor (UASB) or internal-circulation anaerobic reactor (IC).
6. according to claim 4ly process the method for waste water with microbial flocculant, it is characterized in that: step 4) in aerobic biochemical reactor can adopt BAF (BAF) or sbr reactor pond or moving-bed membrane bioreactor (MBBR).
7. according to the method with microbial flocculant processing waste water described in claim 1-6, it is characterized in that: step 6) in the attapulgite attapulgite plate that is template, described attapulgite plate is taking attapulgite, flyash, carbosphere as main raw material, taking clay as binding agent, taking cement expansive material as swelling agent, the parts by weight of the weighing scale of its each component are: attapulgite 50-70 part, flyash 30-60 part, carbosphere 20-45 part, clay are that 5-8 part, cement expansive material are 1-3 part; Described said components is squeezed into template after mixing according to the above ratio.
8. according to claim 1ly process the method for waste water with microbial flocculant, it is characterized in that described step 6) in attapulgite replaceable be foamed metal, described foamed metal adopts electrochemical plating preparation.
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CN108585363A (en) * 2015-09-24 2018-09-28 天津中天精科科技有限公司 A kind of sewage disposal biological respinse and absorption purifier
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CN105601059A (en) * 2016-03-30 2016-05-25 安徽兴安电气设备股份有限公司 Domestic sewage purification treatment method
CN105936571A (en) * 2016-07-15 2016-09-14 青岛科技大学 Method for processing polyurethane (PU) synthetic leather wastewater
CN106430816A (en) * 2016-09-07 2017-02-22 南京工业大学 Pretreatment process for deplating wastewater
CN106732451A (en) * 2016-12-05 2017-05-31 浙江海洋大学 A kind of novel saccharification liquid decolouring reagent
CN106746348B (en) * 2017-01-12 2019-11-05 洛阳理工学院 A kind of lake and reservoir type water source water-fetching head water quality preliminary clearning method
CN106746348A (en) * 2017-01-12 2017-05-31 河南城建学院 A kind of lake Ku Xing water sources water-fetching head water quality preliminary clearning method
CN107986563A (en) * 2017-12-01 2018-05-04 揭阳市腾晟科技咨询有限公司 A kind of processing method applied to wastewater from chemical industry
CN108773912A (en) * 2018-08-17 2018-11-09 南宁市黄陈生猪养殖场 A kind of microbial inoculum treatment process of livestock and poultry cultivation sewage
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CN108996832B (en) * 2018-08-17 2021-05-07 南宁市黄陈生猪养殖场 Process for treating industrial wastewater by using microbial inoculum
CN108773912B (en) * 2018-08-17 2021-06-08 南宁市黄陈生猪养殖场 Microbial inoculum treatment process for livestock and poultry breeding sewage
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