CN103964635B - A kind of metal bi membrane bioreactor of disposing of sewage - Google Patents
A kind of metal bi membrane bioreactor of disposing of sewage Download PDFInfo
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- CN103964635B CN103964635B CN201410171988.8A CN201410171988A CN103964635B CN 103964635 B CN103964635 B CN 103964635B CN 201410171988 A CN201410171988 A CN 201410171988A CN 103964635 B CN103964635 B CN 103964635B
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Abstract
A kind of metal bi membrane bioreactor of disposing of sewage, relate to a kind of apparatus for treating sewage, foul water tank (1) is connected with intake pump (2) through pipeline, the pump discharge of intake pump (2) communicates with the aerobic zone (5) of membrane bioreactor (6), adds pH adjusting agent (8) and reduced iron powder (9) in aerobic zone (5); Gas is entered oxygen district (5) through pipeline by air pump (3) simultaneously; Be oxygen-starved area (4) between the inner bag of membrane bioreactor (6) and outer bag; Water outlet (7) communicates with the outer bag of membrane bioreactor (6); Invention increases the removal effect of refractory organic in sewage, the flocculation structure of microorganism, non-woven membrane surface properties are improved, reduce the pollution speed of non-woven membrane in membrane bioreactor, under gravity flow conditions, add the water flux of mould material, steady in a long-termly can run, be suitable for medium and small water yield reusing sewage engineering, investment, working cost is low, and effluent quality is good, simple to operate.
Description
Technical field
The present invention relates to a kind of apparatus for treating sewage, particularly relate to a kind of metal bi membrane bioreactor of disposing of sewage.
Background technology
The advantage that membrane bioreactor (MBR) has that effluent quality is good, floor space is little, pollutants removal rate is high and the conventional processes such as surplus sludge volume is little is incomparable.But the problems such as the high and fouling membrane of mould material price is serious constrain the development of this technique, need to develop the mould material of cheap macropore thus reduce film cost, reducing working pressure, the economy of raising MBR sewage disposal.In recent years, some investigators attempt to substitute traditional mould material with non-woven fabrics, be applied in MBR sewage treatment process, but non-woven fabrics have surface irregularity, and aperture is comparatively large, and hydrophobicity is strong, easily occur fouling membrane etc. shortcoming.Therefore, control membrane fouling rate, the antifouling property of strengthening non-woven fabrics is the important content of this area research.
The main method that non-woven membrane bio-reactor controlling diaphragm pollutes has: mould material hydrophilic modifying, operation conditions optimization and add inorganic particle etc., and the control membrane fouling effect achieved.But the expansion of the increase of processing cost and working scale all limits the development of non-woven membrane bio-reactor.Still not to be combined with metallic iron to non-woven membrane bio-reactor at present and to improve good sewage processing effect, reduce the report that non-woven membrane pollutes.
Summary of the invention
The object of the present invention is to provide a kind of metal bi membrane bioreactor of disposing of sewage, this reactor fe in bio-reactor through oxidization-reduction, absorption and throwing out, act synergistically with biological sewage treating processes, not only increase the removal effect of refractory organic in sewage, and the flocculation structure to microorganism, non-woven membrane surface properties is all improved effect, thus reduce the pollution speed of non-woven membrane in membrane bioreactor, under gravity flow conditions, add the water flux of mould material, reach the object that system long-term stability is run.
The object of the invention is to be achieved through the following technical solutions:
A metal bi membrane bioreactor of disposing of sewage, described reactor comprises foul water tank; Intake pump; Air pump; Oxygen-starved area between inner bag and outer bag; Aerobic zone; Membrane bioreactor; Water outlet; PH adjusting agent; Reduced iron powder; Foul water tank is connected with intake pump through pipeline, and the pump discharge of intake pump communicates with the aerobic zone of membrane bioreactor, adds pH adjusting agent and reduced iron powder in aerobic zone; Gas is entered oxygen district through pipeline by air pump simultaneously; It is oxygen-starved area between the inner bag of membrane bioreactor and outer bag; Water outlet communicates with the outer bag of membrane bioreactor; Internal layer non-woven fabrics is aerobic microbiological system, and outer non-woven membrane is depth type filtration system, and the material of two-layer nonwoven film is polyethylene, or polypropylene, inner layer film is as biological floe separatory membrane, and the aperture of 10-200 micron is selected in aperture, outer membrane, as depth type filtration film, selects 3-50 micron pore size; The metallic iron added in non-woven membrane bio-reactor is Powdered or graininess or other are irregular, and its composition contains Zero-valent Iron composition.
Described a kind of metal bi membrane bioreactor of disposing of sewage, the metallic iron throwing amount variation range added in described membrane bioreactor be 1 grams per liter to 1000 grams per liters, throwing amount is neglected sewage quality greatly and adjusts.
Advantage of the present invention and effect are:
1. the materialization of the present invention due to metallic iron and the corrosive nature of biochemistry, to hardly degraded organic substance in sewage, there is good Degradation, from common MBR can only to improve degradation effect mechanism different by extending sludge age (SRT), effect also has larger difference, is the organic integration of materialization and biochemical action.In metallic iron corrosion process, the iron derivative of generation effectively can improve the wetting ability of nonwoven surface, alleviates fouling membrane, and by changing the flocculation structure of microorganism, improves the filter effect of non-woven membrane.Double-deck non-woven bag filter for the colourity of water outlet and the removal effect of turbidity obvious.Metallic iron-two-layer nonwoven membrane bioreactor can separately as the integrated facility of sewage disposal, extra spoil disposal can not needed with other sewage treatment process couplings yet, can meet sewage requirement in various degree, have energy-conservation, efficient, flexible and be easy to manage advantage.
2. the present invention can operate operation under gravity flow conditions, under higher membrane flux condition, does not have obvious head loss after long-time running.Through two-layer nonwoven filter the colourity of water outlet and turbidity all lower, and achieve good pollutant removal.
Accompanying drawing explanation
Fig. 1 is iron of the present invention-diatomite two-layer nonwoven membrane bioreactor schematic diagram;
Fig. 2 is the outer flushing waste water suspended solids settling character figure of car.
Embodiment
Below in conjunction with accompanying drawing illustrated embodiment, the invention will be further described.
In figure: foul water tank 1; Intake pump 2; Air pump 3; Oxygen-starved area 4 between inner bag and outer bag; Aerobic zone 5; Membrane bioreactor 6; Water outlet 7; PH adjusting agent 8; Reduced iron powder 9.
Foul water tank 1 is connected with intake pump 2 through pipeline, and the pump discharge of intake pump 2 communicates with the aerobic zone 5 of membrane bioreactor 6, adds pH adjusting agent 8 and reduced iron powder 9 in aerobic zone 5; Gas is entered oxygen district 5 through pipeline by air pump 3 simultaneously; It is oxygen-starved area 4 between the inner bag of membrane bioreactor 6 and outer bag; Water outlet 7 communicates with the outer bag of membrane bioreactor 6.
Low cost of the present invention, effectively can remove colloid and dissolved organic matter in sewage, particularly to the process of some hardly degraded organic substances.Metallic iron corrosion derivative in the reactor, effectively can alleviate the pollution speed of non-woven membrane, improve effluent quality, the present invention is easily processed into integrated sewage treating apparatus, also can with other sewage treatment process combined utilization.
Embodiment 1:
Certain chemical industry goods transportation company washing bay, the outer flushing waste water 150 cubic metres of average daily output car, main contamination index is as shown in table 1.
The outer flushing waste water water-quality guideline feature of table 1 car
| Index | pH | COD（mg/L） | SS（mg/L） | Oil (mg/L) |
| Waste water | 7.3 | 156 | 1329 | 20 |
Because actual wastewater from car washer turbidity is very high, and contain the larger solids of some particles.As shown in Figure 2, car is flushing waste water suspended solids settling character outward for suspended solids sedimentation experiment result.
Visible, in waste water, suspended solids settling property is good, and sedimentation is after 6 minutes, and suspended solids (filtration of middling speed quantitative paper) clearance just can reach 80%.Therefore, primary sedimentation pond is first adopted to carry out pre-treatment.
Waste water after preliminary precipitation, intends adopting the conventional combination process of coagulation-precipitation-filtration to process, adopts polymerize aluminum chloride (PAC) to be coagulating agent.Determine through on-the-spot beaker experiments, for the actual wastewater from car washer in scene, coagulant charging quantity is 200mg/L, and adopt peristaltic pump quantitatively to add, wastewater treatment pilot experiment adopts Continuous Flow, runs 4 hours altogether.Result shows, this technique is better to wastewater from car washer treatment effect, and the turbidity of water outlet, suspended sediment concentration, pH index all reach discharge of wastewater index; But COD value of waste water is higher, be difficult to reach standard.Enterprise's site area is also less in addition, is not suitable for longer sewage treatment process.Use metallic iron-two-layer nonwoven membrane bioreactor instead, design water flux is 80L/m2.h, runs 1 month continuously, and operating performance is stablized, and pilot plant test result is as shown in table 2, reaches the requirement of reusing sewage completely.
Table 2 wastewater from car washer non-woven fabrics flco bioreactor of dynamic membrane treatment effect
| Water sample | pH | COD(mg/L) | SS(mg/L) | Turbidity (NTU) |
| Process water outlet | 7.80 | 14-19 | 3-3.8 | 1.2-2.03 |
Embodiment 2:
Certain treatment of dyeing wastewater factory of enterprise, process water outlet COD value is at 100-120mg/L, and current new standard requires that it reaches below 60mg/L.Once adopted the kinds of processes such as ozone+biological activated carbon, Fenton reagent method, charcoal absorption to carry out advanced treatment, but effect is all undesirable, or investment working cost is difficult to accept.
Adopt metallic iron-two-layer nonwoven membrane bioreactor, design water flux is 40L/m2.h, and after running for some time, system treatment effect is stablized, and system water outlet COD can reach processing requirements, and water outlet COD value sometimes can be less than 30mg/L.
Claims (1)
1. a metal bi membrane bioreactor of disposing of sewage, it is characterized in that, described reactor comprises foul water tank (1), intake pump (2), air pump (3), the oxygen-starved area (4) between internal layer non-woven membrane bag and outer non-woven membrane bag, aerobic zone (5), membrane bioreactor (6), water outlet (7), pH adjusting agent (8), reduced iron powder (9); Foul water tank (1) is connected with intake pump (2) through pipeline, the pump discharge of intake pump (2) communicates with the aerobic zone (5) of membrane bioreactor (6), pH adjusting agent (8) and reduced iron powder (9) is added in aerobic zone (5), simultaneously, gas is entered aerobic zone (5) through pipeline by air pump (3), is oxygen-starved area (4) between the internal layer non-woven membrane bag of membrane bioreactor (6) and outer non-woven membrane bag; Water outlet (7) communicates with the outer non-woven membrane bag of membrane bioreactor (6); Internal layer non-woven membrane bag is aerobic microbiological system, outer non-woven membrane bag is depth type filtration system, the material of two-layer nonwoven film bag is polyethylene or polypropylene, internal layer non-woven membrane bag is as biological floe separatory membrane, the aperture of 10-200 micron is selected in aperture, outer non-woven membrane bag, as depth type filtration film, selects 3-50 micron pore size; The metallic iron added in non-woven membrane bio-reactor is Powdered or graininess or other are irregular, and its composition contains Zero-valent Iron composition;
The metallic iron throwing amount variation range added in described membrane bioreactor be 1 grams per liter to 1000 grams per liters, throwing amount is neglected sewage quality greatly and adjusts.
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| CN201410171988.8A CN103964635B (en) | 2014-04-28 | 2014-04-28 | A kind of metal bi membrane bioreactor of disposing of sewage |
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| CN103964635B true CN103964635B (en) | 2015-10-28 |
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| CN101323484A (en) * | 2008-07-25 | 2008-12-17 | 山东大学 | Nesting type multidimensional membrane assembly dynamic membrane bioreactor |
| CN102452717A (en) * | 2010-10-20 | 2012-05-16 | 上海工程技术大学 | Non-woven fabric floc dynamic membrane bioreactor for sewage treatment |
| CN102557255A (en) * | 2012-01-05 | 2012-07-11 | 中山大学 | Biological membrane-activated sludge composite membrane bioreactor for denitrification and water treatment method using same |
| CN103406026A (en) * | 2013-07-18 | 2013-11-27 | 华南师范大学 | Double-layer structured flat membrane element for membrane bioreactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100981519B1 (en) * | 2007-12-24 | 2010-09-10 | 재단법인서울대학교산학협력재단 | Membrane bioreactor process for water treatment using enzyme for inhibiting biofilm formation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323484A (en) * | 2008-07-25 | 2008-12-17 | 山东大学 | Nesting type multidimensional membrane assembly dynamic membrane bioreactor |
| CN102452717A (en) * | 2010-10-20 | 2012-05-16 | 上海工程技术大学 | Non-woven fabric floc dynamic membrane bioreactor for sewage treatment |
| CN102557255A (en) * | 2012-01-05 | 2012-07-11 | 中山大学 | Biological membrane-activated sludge composite membrane bioreactor for denitrification and water treatment method using same |
| CN103406026A (en) * | 2013-07-18 | 2013-11-27 | 华南师范大学 | Double-layer structured flat membrane element for membrane bioreactor |
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| 复合式膜生物反应器的膜污染控制机理;刘强等;《环境科学与技术》;20120731;第35卷(第07期);第12-15页 * |
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