CN102976552B - Method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater - Google Patents
Method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater Download PDFInfo
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Abstract
The invention relates to a method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater and belongs to the field of industrial wastewater treatment methods. The method comprises the following steps of 1, putting a suspended filler into a moving-bed biomembrane reactor, carrying out biomembrane culture, after the biomembrane culture, inputting difficultly-degraded nitrogen-containing industrial wastewater subjected to biochemical treatment into the moving-bed biomembrane reactor, and carrying out treatment, wherein the moving-bed biomembrane reactor operates by continuous water feeding, continuous draining and continuous aeration methods, 2, inputting the wastewater treated by the moving-bed biomembrane reactor into a membrane bioreactor, wherein the membrane bioreactor is added with activated sludge and operates by the continuous water feeding, continuous draining and continuous aeration methods, and 3, through a cartridge filter, treating the wastewater treated by the membrane bioreactor, and then filtering the treated wastewater by a reverse osmosis device. According to recycle water demands, it is determined if the step 3 is adopted so that quality-classification recycle is realized.
Description
Technical field
The invention belongs to the process for treating industrial waste water field, particularly a kind of deep treatment method of organic nitrogen-containing trade effluent.
Background technology
The pollutant component complexity contained in trade effluent, contain in most trade effluent and be difficult to biodegradable pollutent, this makes in the water outlet of routine biochemistry treatment process and still contains the pollutents such as part refractory organic and ammonia nitrogen, can't meet the waste water comprehensive discharge standard, therefore need to realize by setting up wastewater deep treatment process the qualified discharge of waste water, thereby realize the reuse of waste water.
At present, the normal wastewater deep treatment process adopted mainly contains: (1) coagulation-settlement process, this technique is for the advanced treatment of waste water, there is treatment effect preferably, effluent quality can reach discharging standards, but need to add a certain amount of medicament, and need rearmounted filtration process to remove microactuator suspension small-particle remaining in waste water, processing cost is high; (2) active carbon absorption technology, this technique is usually used in the strengthening advanced treatment process of waste water, the pollutant kind advanced in water affects less, treatment effect is good, effluent quality is better than the comprehensive discharge standard of country about waste water, but, because the device working cost is high, the regeneration of activated carbon difficulty is large, therefore in the actual waste water advanced treatment, not yet is widely applied; (3) enhanced biological treatment technology, biological aerated filter process is as enhanced biological treatment technology commonly used, be generally used in the degree of depth biological treatment process of waste water, this technique has good treatment effect for the nitrogen-containing pollutant in trade effluent, but undesirable to being difficult to biodegradable organic removal effect in trade effluent, still contain tiny suspended particle in water outlet after this art breading, and the waste water after processing is difficult to realize qualified discharge, also can't realize the reuse of trade effluent.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of deep treatment method of difficult degradation organic nitrogen-containing trade effluent is provided, the method is good to nitrogen-containing pollutant remaining in waste water and refractory organic removal effect, qualified discharge can be realized, and the separate-recycling of waste water can be realized according to the difference of reuse water quality requirement.
The deep treatment method of difficult degradation organic nitrogen-containing trade effluent of the present invention, can adopt following two kinds of methods to be processed according to the reuse water demand, thereby reach the purpose of separate-recycling.
The processing step of method one is as follows:
(1) floating stuffing dropped in MBBR and carry out the microbial film cultivation, after microbial film is cultivated and is finished, to in the difficult degradation organic nitrogen-containing trade effluent input MBBR through biochemical treatment, be processed, described MBBR adopts the mode of continuous water inlet, continuous drainage, continuous aeration to move;
(2) the waste water input membrane bioreactor that will process through MBBR, throw in active sludge is arranged in described membrane bioreactor, adopt the mode of water inlet continuously, gap draining, continuous aeration to move, waste water after processing discharges after the membrane filtration module of membrane bioreactor, completes the advanced treatment of difficult degradation organic nitrogen-containing trade effluent.
The waste water of processing through the method can meet the reuse of waste water when not high to water quality requirement, as sprayed the purposes such as road, landscape water.
The processing step of method two is as follows:
(1) floating stuffing dropped in MBBR and carry out the microbial film cultivation, after microbial film is cultivated and is finished, to in the difficult degradation organic nitrogen-containing trade effluent input MBBR through biochemical treatment, be processed, described MBBR adopts the mode of continuous water inlet, continuous drainage, continuous aeration to move;
(2) the waste water input membrane bioreactor that will process through MBBR, throw in active sludge arranged in described membrane bioreactor, adopts continuously the mode of water inlet, gap draining, continuous aeration to move;
(3) waste water after Membrane Bioreactor for Wastewater Treatment is adopted after cartridge filter reverse osmosis unit filtered the advanced treatment that completes difficult degradation organic nitrogen-containing trade effluent.
The waste water of processing through the method can meet the reuse of waste water when higher to water quality requirement, as recirculating cooling water system.
In above-mentioned two kinds of methods, the injected volume of described floating stuffing is 25～45% of MBBR useful volume, the hydraulic detention time of described waste water in MBBR is 8～12 h, and the aeration rate of described aeration reaches 2～5 mg/L with the dissolved oxygen concentration in MBBR and is limited.
In above-mentioned two kinds of methods, active mud content in described membrane bioreactor is controlled at every liter of waste water 4～6 g, the hydraulic detention time of described waste water in membrane bioreactor is 6～10 h, the aeration rate of described aeration reaches 3～6 mg/L with the dissolved oxygen concentration in membrane bioreactor and is limited, and the water discharge time of described intermittent drainage is 7:1～9:1 with the ratio that stops water discharge time.
In above-mentioned two kinds of methods, described microbial film cultural method is as follows: in MBBR, add waste water and add active sludge, in described waste water, COD concentration is controlled at 300 ~ 500mg/L, ammonia nitrogen concentration is controlled at 15 ~ 40mg/L, the add-on of described waste water is 70 ~ 90% of MBBR useful volume, the dosage of described active sludge is every liter of waste water 2～3g, then with aeration 6 h, the mode of stopping aeration 2 h, move, in waste water, COD concentration is down to when 200 ~ 300mg/L, ammonia nitrogen concentration are down to 5 ~ 15mg/L and is discharged waste water; Repeat the above-mentioned operation to adding waste water, intermittent aeration and discharge waste water in MBBR, until the floating stuffing internal surface finishes to cultivate while being covered by microbial film fully.
In aforesaid method two, the dense water of meeting generating portion in the reverse osmosis unit operational process, after every operation for some time, can and process with Fenton reagent concentrated water discharge wherein, further to transform not biodegradable pollutent wherein, waste water after Fenton reagent is processed passes in the moving-bed membrane bioreactor to be processed, and can realize the organic effective processing of non-degradable.
In above-mentioned two kinds of methods, the material of described floating stuffing is generally polyethylene or it is material modified, and density is 0.96～0.98 g/cm
3, being shaped as cylinder, its inside has the cross bracing structure, and after its internal surface is covered by microbial film fully, the density of density and waste water is close.
The MBBR, membrane bioreactor, cartridge filter and the reverse osmosis unit that in above-mentioned two kinds of methods, use have commercial goods.
The present invention has following beneficial effect:
1, it is bad to the hardly degraded organic substance removal effect contained in waste water that the present invention can overcome existing nitrogenous advanced treatment of industrial waste water technology, water outlet is difficult to problem up to standard, and can require to realize according to different industrial effluent reusings the separate-recycling of nitrogenous trade effluent.
2, the growth of the floating stuffing internal surface in the MBBR technique of the method for the invention has microbial film, this microbial film is the aggregate of microorganism, organism and ammonia nitrogen are had to good removal ability, and floating stuffing has good fixed action to microorganism, can reduce the hydraulic shear effect for biomembranous impact, thereby guarantee that reactor still has pollutant removal preferably under disadvantageous operational conditions.
3, the MBBR technique that the method for the invention adopts, under the aeration effect, floating stuffing after biofilm circulates in bio-reactor, rely on the metabolism of microorganism species in microbial film to remove the pollutent in waste water, mass transfer effect is good, has overcome biomembrane process the deficiency of stopping up easily occurs.
4, the membrane biological reactor process that the method for the invention adopts has longer sludge age, thereby micropopulation wherein has adaptability preferably to the refractory organic in waste water, and process through MBBR, Pollutant levels in waste water are very low, can be limited for the organism of microorganism growth in membrane bioreactor, pollute the impact on the membrane filtration performance thereby can effectively reduce microbial film.
5, the membrane biological reactor process that the method for the invention adopts can be realized the biological degradation of Pollutants in Wastewater and the filtering function of tiny suspended solids simultaneously, can meet the reuse of waste water when not high to water quality requirement through the water outlet of this art breading, the water outlet of processing through reverse osmosis unit can meet the reuse of water quality requirement waste water when higher, can realize the grading recycle of waste water, reach the target of zero discharge of industrial waste water, eliminate the impact of trade effluent on ecotope from source, there is good social benefit.
The accompanying drawing explanation
Fig. 1 is the first process flow sheet of the deep treatment method of difficult degradation organic nitrogen-containing trade effluent of the present invention;
Fig. 2 is the second process flow sheet of the deep treatment method of difficult degradation organic nitrogen-containing trade effluent of the present invention.
In figure, 1-MBBR, 2-membrane bioreactor, 3-intake pump, 4-boring aeration pipe, 5-aeration pump, 6-floating stuffing, 7-membrane module, 8-1-first go out water pump, 8-2-second goes out water pump, 9-cartridge filter, 10-reverse osmosis unit.
Embodiment
Below by embodiment, the deep treatment method of difficult degradation organic nitrogen-containing trade effluent of the present invention is described further.In following each embodiment, the main body of MBBR 1 is cylinder, and aspect ratio is 2:1, and bottom is provided with the aeration tube 4 that the aeration pump outside with it 5 is connected, and its useful volume is 10L; Membrane bioreactor 2 is inner circulation structure, is fixed with membrane filtration module 7 in its inner sleeve, and the bottom of membrane bioreactor is provided with the aeration tube 4 that the aeration pump outside with it 5 is connected, and its useful volume is 12L.Cartridge filter 9 is selected according to handled actual amount of water, and the water production rate of reverse osmosis unit is 20L/h.The material of described floating stuffing is polyethylene, and density is 0.96～0.98 g/cm
3, being shaped as cylinder, physical dimension is Φ 25mm * 10mm, its inside has the cross bracing structure, and after its internal surface is covered by microbial film fully, the density of density and waste water is close.
Embodiment 1
In the present embodiment, the water quality situation of the difficult degradation organic nitrogen-containing trade effluent of process biochemical treatment: COD concentration is 300 mg/L, and ammonia nitrogen concentration is 20 mg/L, and the pH value is 7.5.
In the present embodiment, as described in Figure 1, step is as follows for the advanced treatment process of difficult degradation organic nitrogen-containing trade effluent:
(1) by material, be that poly floating stuffing 6 drops in MBBR 1 and carries out the microbial film cultivation, the injected volume of described floating stuffing 6 is 25% of MBBR useful volume, described microbial film cultural method is as follows: in MBBR, add COD concentration 500mg/L, the waste water of ammonia nitrogen concentration 40mg/L, the add-on of described waste water is 90% of reactor useful volume, add again active sludge, the dosage of active sludge is every liter of waste water 3g, with aeration 6 h, stopping the mode of aeration 2 h moves, in waste water, COD concentration is down to 300mg/L, draining when ammonia nitrogen concentration is down to 15mg/L, then repeat the above-mentioned operation to adding waste water, intermittent aeration and discharge waste water in MBBR, until the floating stuffing internal surface finishes to cultivate while being covered by microbial film fully,
After microbial film is cultivated and is finished, to pump in MBBR and be processed through intake pump 3 in the bottom by MBBR 1 through the difficult degradation organic nitrogen-containing trade effluent of biochemical treatment, described MBBR 1 adopts the mode of continuous water inlet, continuous drainage, continuous aeration to move, the hydraulic detention time of described waste water in MBBR is 8 h, and the aeration rate of described aeration reaches 2 mg/L with the dissolved oxygen concentration in MBBR and is limited;
(2) waste water that will process through MBBR 1 relies on action of gravity to flow into the top of membrane bioreactor 2 by its top, throw in active sludge is arranged in described membrane bioreactor, adopt water inlet continuously, the gap draining, the mode of continuous aeration is moved, active mud content in described membrane bioreactor is controlled at every liter of waste water 4 g, the hydraulic detention time of described waste water in membrane bioreactor is 6 h, the aeration rate of described aeration reaches 3 mg/L with the dissolved oxygen concentration in membrane bioreactor 2 and is limited, the draining of described intermittent drainage is 7:1 with the ratio of the time that stops draining, waste water after processing goes out water pump 8-1 by first and pumps after the membrane filtration module 7 of membrane bioreactor, complete the advanced treatment of difficult degradation organic nitrogen-containing trade effluent.
The nitrogenous organic industrial sewage of difficult degradation that the present embodiment is processed carries out test analysis, and result is: COD concentration is 90 mg/L, and the ammonia nitrogen concentration of water outlet is lower than 10 mg/L.
In the present embodiment, the water quality situation of the difficult degradation organic nitrogen-containing trade effluent of process biochemical treatment: COD concentration is 300 mg/L, and ammonia nitrogen concentration is 20 mg/L, and the pH value is 7.5.
In the present embodiment, as described in Figure 1, step is as follows for the advanced treatment process of difficult degradation organic nitrogen-containing trade effluent:
(1) by material, be that poly floating stuffing 6 drops in MBBR 1 and carries out the microbial film cultivation, the injected volume of described floating stuffing is 45% of MBBR useful volume, described microbial film cultural method is as follows: in MBBR, add COD concentration 300mg/L, the waste water of ammonia nitrogen concentration 15mg/L, the add-on of described waste water is 70% of reactor useful volume, add again active sludge, the dosage of active sludge is every liter of waste water 2g, with aeration 6 h, stopping the mode of aeration 2 h moves, in waste water, COD is down to 200mg/L, draining when ammonia nitrogen concentration is down to 5mg/L, then repeat the above-mentioned operation to adding waste water, intermittent aeration and discharge waste water in MBBR, until the floating stuffing internal surface finishes to cultivate while being covered by microbial film fully,
After microbial film is cultivated and is finished, to pump in MBBR and be processed through intake pump 3 in the bottom by MBBR 1 through the difficult degradation organic nitrogen-containing trade effluent of biochemical treatment, described MBBR adopts the mode of continuous water inlet, continuous drainage, continuous aeration to move, the hydraulic detention time of described waste water in MBBR is 12 h, and the aeration rate of described aeration reaches 5 mg/L with the dissolved oxygen concentration in MBBR and is limited;
(2) waste water that will process through MBBR relies on action of gravity to flow into the top of membrane bioreactor 2 by its top, throw in active sludge is arranged in described membrane bioreactor, adopt water inlet continuously, the gap draining, the mode of continuous aeration is moved, active mud content in described membrane bioreactor is controlled at every liter of waste water 6 g, the hydraulic detention time of described waste water in membrane bioreactor is 10 h, the aeration rate of described aeration reaches 6 mg/L with the dissolved oxygen concentration in membrane bioreactor and is limited, the draining of described intermittent drainage is 9:1 with the ratio of the time that stops draining, waste water after processing goes out water pump 8-1 by first and pumps after the membrane filtration module 7 of membrane bioreactor, completes the advanced treatment of difficult degradation organic nitrogen-containing trade effluent.
The nitrogenous organic industrial sewage of difficult degradation that the present embodiment is processed carries out test analysis, and result is: COD concentration is 80 mg/L, and the ammonia nitrogen concentration of water outlet is lower than 5 mg/L.
Embodiment 3
In the present embodiment, the water quality situation of the difficult degradation organic nitrogen-containing trade effluent of process biochemical treatment: COD concentration is 300 mg/L, and ammonia nitrogen concentration is 20 mg/L, and the pH value is 7.5.
In the present embodiment, as described in Figure 2, step is as follows for the advanced treatment process of difficult degradation organic nitrogen-containing trade effluent:
(1) by material, be that poly floating stuffing 6 drops in MBBR 1 and carries out the microbial film cultivation, the injected volume of described floating stuffing is 25% of MBBR useful volume, described microbial film cultural method is as follows: in MBBR, add COD concentration 500mg/L, the waste water of ammonia nitrogen concentration 40mg/L, the add-on of described waste water is 90% of reactor useful volume, add again active sludge, the dosage of active sludge is every liter of waste water 3g, with aeration 6 h, stopping the mode of aeration 2 h moves, in waste water, COD concentration is down to 300mg/L, draining when ammonia nitrogen concentration is down to 15mg/L, then repeat the above-mentioned operation to adding waste water, intermittent aeration and discharge waste water in MBBR, until the floating stuffing internal surface finishes to cultivate while being covered by microbial film fully,
After microbial film is cultivated and is finished, to pump in MBBR and be processed through intake pump 3 in the bottom by MBBR 1 through the difficult degradation organic nitrogen-containing trade effluent of biochemical treatment, described MBBR adopts the mode of continuous water inlet, continuous drainage, continuous aeration to move, the hydraulic detention time of described waste water in MBBR is 8 h, and the aeration rate of described aeration reaches 2 mg/L with the dissolved oxygen concentration in MBBR and is limited;
(2) waste water that will process through MBBR relies on action of gravity to flow into the top of membrane bioreactor 2 by its top, throw in active sludge is arranged in described membrane bioreactor, adopt water inlet continuously, the gap draining, the mode of continuous aeration is moved, active mud content in described membrane bioreactor is controlled at every liter of waste water 4 g, the hydraulic detention time of described waste water in membrane bioreactor is 6 h, the aeration rate of described aeration reaches 3 mg/L with the dissolved oxygen concentration in membrane bioreactor and is limited, the draining of described intermittent drainage is 7:1 with the ratio of the time that stops draining, waste water after processing goes out water pump 8-1 by first and pumps after the membrane filtration module 7 of membrane bioreactor,
(3) waste water after Membrane Bioreactor for Wastewater Treatment is gone out to water pump 8-1 by first and pump into cartridge filter 9, the water outlet of 10 pairs of cartridge filters 9 of employing reverse osmosis unit goes out water pump 8-2 by second after being filtered pumps, and completes the advanced treatment of difficult degradation organic nitrogen-containing trade effluent.
The nitrogenous organic industrial sewage of difficult degradation that the present embodiment is processed carries out test analysis, and result is: COD concentration is 40 mg/L, and the ammonia nitrogen concentration of water outlet is 3 mg/L.
In the present embodiment, the water quality situation of the difficult degradation organic nitrogen-containing trade effluent of process biochemical treatment: COD concentration is 300 mg/L, and ammonia nitrogen concentration is 20 mg/L, and the pH value is 7.5.
In the present embodiment, as described in Figure 2, step is as follows for the advanced treatment process of difficult degradation organic nitrogen-containing trade effluent:
(1) by material, be that poly floating stuffing 6 drops in MBBR 1 and carries out the microbial film cultivation, the injected volume of described floating stuffing is 45% of MBBR useful volume, described microbial film cultural method is as follows: in MBBR, add COD concentration 300mg/L, the waste water of ammonia nitrogen concentration 15mg/L, the add-on of described waste water is 70% of reactor useful volume, add again active sludge, the dosage of active sludge is every liter of waste water 2g, with aeration 6 h, stopping the mode of aeration 2 h moves, in waste water, COD concentration is down to 200mg/L, draining during ammonia nitrogen concentration difference 5mg/L, then repeat the above-mentioned operation to adding waste water, intermittent aeration and discharge waste water in MBBR, until the floating stuffing internal surface finishes to cultivate while being covered by microbial film fully,
After microbial film is cultivated and is finished, to pump in MBBR and be processed through intake pump 3 in the bottom by MBBR 1 through the difficult degradation organic nitrogen-containing trade effluent of biochemical treatment, described MBBR adopts the mode of continuous water inlet, continuous drainage, continuous aeration to move, the hydraulic detention time of described waste water in MBBR 1 is 12 h, and the aeration rate of described aeration reaches 5 mg/L with the dissolved oxygen concentration in MBBR and is limited;
(2) waste water that will process through MBBR 1 relies on action of gravity to flow into the top of membrane bioreactor 2 by its top, throw in active sludge is arranged in described membrane bioreactor, adopt water inlet continuously, the gap draining, the mode of continuous aeration is moved, active mud content in described membrane bioreactor is controlled at every liter of waste water 6 g, the hydraulic detention time of described waste water in membrane bioreactor is 10 h, the aeration rate of described aeration reaches 6 mg/L with the dissolved oxygen concentration in membrane bioreactor and is limited, the draining of described intermittent drainage is 9:1 with the ratio of the time that stops draining, waste water after processing goes out water pump 8-1 by first and pumps after the membrane filtration module 7 of membrane bioreactor,
(3) waste water after Membrane Bioreactor for Wastewater Treatment is gone out to water pump 8-1 by first and pump into cartridge filter 9, the water outlet of 10 pairs of cartridge filters 9 of employing reverse osmosis unit goes out water pump 8-2 by second after being filtered pumps, and completes the advanced treatment of difficult degradation organic nitrogen-containing trade effluent.
The nitrogenous organic industrial sewage of difficult degradation that the present embodiment is processed carries out test analysis, and result is: COD concentration is 30 mg/L, and the ammonia nitrogen concentration of water outlet is at 1 mg/L.
Claims (4)
1. the deep treatment method of a difficult degradation organic nitrogen-containing trade effluent is characterized in that processing step is as follows:
(1) floating stuffing dropped in MBBR and carry out the microbial film cultivation, after microbial film is cultivated and is finished, to in the difficult degradation organic nitrogen-containing trade effluent input MBBR through biochemical treatment, be processed, described MBBR adopts the mode of continuous water inlet, continuous drainage, continuous aeration to move;
(2) the waste water input membrane bioreactor that will process through MBBR, throw in active sludge is arranged in described membrane bioreactor, adopt the mode of water inlet continuously, gap draining, continuous aeration to move, waste water after processing discharges after the membrane filtration module of membrane bioreactor, completes the advanced treatment of difficult degradation organic nitrogen-containing trade effluent;
Described microbial film cultural method is as follows: in MBBR, add waste water and add active sludge, in described waste water, COD concentration is controlled at 300～500mg/L, ammonia nitrogen concentration is controlled at 15～40mg/L, the add-on of described waste water is 70～90% of MBBR useful volume, the dosage of described active sludge is every liter of waste water 2～3g, then with aeration 6h, the mode of stopping aeration 2h, move, in waste water, COD concentration is down to when 200～300mg/L, ammonia nitrogen concentration are down to 5～15mg/L and is discharged waste water;
Repeat the above-mentioned operation to adding waste water, intermittent aeration and discharge waste water in MBBR, until the floating stuffing internal surface finishes to cultivate while being covered by microbial film fully.
2. the deep treatment method of a difficult degradation organic nitrogen-containing trade effluent is characterized in that processing step is as follows:
(1) floating stuffing dropped in MBBR and carry out the microbial film cultivation, after microbial film is cultivated and is finished, to in the difficult degradation organic nitrogen-containing trade effluent input MBBR through biochemical treatment, be processed, described MBBR adopts the mode of continuous water inlet, continuous drainage, continuous aeration to move;
(2) the waste water input membrane bioreactor that will process through MBBR, throw in active sludge arranged in described membrane bioreactor, adopts continuously the mode of water inlet, gap draining, continuous aeration to move;
(3) waste water after Membrane Bioreactor for Wastewater Treatment is adopted after cartridge filter reverse osmosis unit filtered the advanced treatment that completes difficult degradation organic nitrogen-containing trade effluent;
Described microbial film cultural method is as follows: in MBBR, add waste water and add active sludge, in described waste water, COD concentration is controlled at 300～500mg/L, ammonia nitrogen concentration is controlled at 15～40mg/L, the add-on of described waste water is 70～90% of MBBR useful volume, the dosage of described active sludge is every liter of waste water 2～3g, then with aeration 6h, the mode of stopping aeration 2h, move, in waste water, COD concentration is down to when 200～300mg/L, ammonia nitrogen concentration are down to 5～15mg/L and is discharged waste water;
Repeat the above-mentioned operation to adding waste water, intermittent aeration and discharge waste water in MBBR, until the floating stuffing internal surface finishes to cultivate while being covered by microbial film fully.
3. according to the deep treatment method of the described difficult degradation organic nitrogen-containing of claim 1 or 2 trade effluent, the injected volume that it is characterized in that described floating stuffing is 25～45% of MBBR useful volume, the hydraulic detention time of described waste water in MBBR is 8～12h, and the aeration rate of described aeration reaches 2～5mg/L with the dissolved oxygen concentration in MBBR and is limited.
4. according to the deep treatment method of the described difficult degradation organic nitrogen-containing of claim 1 or 2 trade effluent, it is characterized in that the active mud content in described membrane bioreactor is controlled at every liter of waste water 4～6g, the hydraulic detention time of described waste water in membrane bioreactor is 6～10h, the aeration rate of described aeration reaches 3～6mg/L with the dissolved oxygen concentration in membrane bioreactor and is limited, and the water discharge time of described intermittent drainage is 7:1～9:1 with the ratio that stops water discharge time.
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| CN104909519B (en) * | 2015-06-11 | 2017-08-04 | 上海世浦泰膜科技有限公司 | A kind of aerobic MBR membrane modules sewage treatment process of anaerobic/anoxic |
| CN105565480A (en) * | 2016-03-02 | 2016-05-11 | 南京工业大学 | Biofilm formation method of carrier filler in moving bed biofilm reactor |
| CN105948225B (en) * | 2016-05-05 | 2018-07-20 | 四川大学 | Flexible biological ball and its cultural method for wastewater treatment |
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| CN112777848B (en) * | 2020-12-13 | 2022-08-23 | 中海油天津化工研究设计院有限公司 | Membrane aeration biological activated carbon bed advanced treatment system and method |
| CN112759183A (en) * | 2020-12-17 | 2021-05-07 | 自然资源部天津海水淡化与综合利用研究所 | Method for treating corn starch processing wastewater |
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