CN103964646A - Method for anaerobic-aerobiotic-microbial flocculation reinforced wastewater treatment - Google Patents
Method for anaerobic-aerobiotic-microbial flocculation reinforced wastewater treatment Download PDFInfo
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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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- 238000005189 flocculation Methods 0.000 title claims abstract description 24
- 230000016615 flocculation Effects 0.000 title claims abstract description 24
- 238000004065 wastewater treatment Methods 0.000 title abstract description 7
- 239000002351 wastewater Substances 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229960000892 attapulgite Drugs 0.000 claims abstract description 34
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 34
- 230000000813 microbial effect Effects 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 17
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 claims abstract description 12
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000004061 bleaching Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 239000002244 precipitate Substances 0.000 claims abstract description 6
- 238000005273 aeration Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 10
- 230000003311 flocculating effect Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 6
- 239000011496 polyurethane foam Substances 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- MEIRRNXMZYDVDW-MQQKCMAXSA-N (2E,4E)-2,4-hexadien-1-ol Chemical compound C\C=C\C=C\CO MEIRRNXMZYDVDW-MQQKCMAXSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 3
- 229930195725 Mannitol Natural products 0.000 claims description 3
- 241000316848 Rhodococcus <scale insect> Species 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000000594 mannitol Substances 0.000 claims description 3
- 235000010355 mannitol Nutrition 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 241000894006 Bacteria Species 0.000 claims description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 2
- 241000187561 Rhodococcus erythropolis Species 0.000 claims description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 229940041514 candida albicans extract Drugs 0.000 claims description 2
- 239000008103 glucose Substances 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
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- 239000011718 vitamin C Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000012138 yeast extract Substances 0.000 claims description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 abstract 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N CuO Inorganic materials [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract 1
- 239000001110 calcium chloride Substances 0.000 abstract 1
- 229910001628 calcium chloride Inorganic materials 0.000 abstract 1
- 235000011148 calcium chloride Nutrition 0.000 abstract 1
- 230000000249 desinfective effect Effects 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000010865 sewage Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
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Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
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
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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