CN2565812Y

CN2565812Y - Integrated membrane bioreactor

Info

Publication number: CN2565812Y
Application number: CN02264295U
Authority: CN
Inventors: 袁福平; 左中海
Original assignee: YANGZHOU TIANYU ENVIRONMENTAL
Current assignee: YANGZHOU TIANYU ENVIRONMENTAL
Priority date: 2002-09-09
Filing date: 2002-09-09
Publication date: 2003-08-13
Anticipated expiration: 2012-09-09

Abstract

The utility model relates to the technical field of water supply and sewerage works, particularly a device which purifies waste water by using an activated sludge method. The utility model comprises an aerobic pool provided with an aerator pipe. The utility model is characterized in that a hollow fiber membrane assembly is arranged in the aerobic pool. The utility model directly combines the membrane separating technology with the biological treating technology. Nearly all microorganisms are trapped in a bioreactor by a membrane so that the concentration of the biological sludge in reaction is very high. The sludge age can be infinitely long in theory so the content of pollutants of organic substances in water is reduced to the minimum. The utility model effectively remove SS, BOD, COD, NH#-<3>-N, colibacillus, etc.

Description

Integral type film biological reactor

Affiliated field

The utility model relates to the water supply and sewage work technical field, particularly a kind of device that utilizes activated sludge process to carry out purification of waste water.

Background technology

In recent years, because people are more and more higher to the requirement of quality of water environment, the water outlet of traditional biological treatment process is difficult to satisfy more and more stricter sewage drainage standard.The worsening shortages of while water resources is the suitable reusing sewage technology of an urgent demand exploitation also, to alleviate the imbalance between supply and demand of water resources.

With the activated sludge process is traditional aerobe waste water treatment process of representative, is used widely in sanitary sewage and Industrial Wastewater Treatment for a long time.But, there is the problem of the following aspects owing to adopt the solid-liquid separation means of gravity type boat davit settling tank as water treatment and microorganism:

1, because the not high settling tank efficient that causes of settling tank solid-liquid separation efficiency is low;

2, the mud in the aeration tank is difficult to be maintained to higher concentration, and biochemical reaction rate is restricted, causes the treatment unit volumetric loading low;

3, excess sludge production is big, the disposal costs height;

4, water quality treatment is not ideal enough and unstable;

5, need professional's management, complicated operation.

Technical scheme

The utility model purpose is to design a kind ofly can carry out solid-liquid separation efficiently, improves effluent quality, stable integral type film biological reactor.

The utility model comprises the Aerobic Pond that is provided with aeration tube, is characterised in that to be provided with hollow fiber film assembly in Aerobic Pond.

The utility model directly engages membrane separation technique and biologic treating technique, film almost can be trapped in all microorganisms in the bio-reactor, this makes the biological sludge very high concentrations in the reaction, sludge age can endless in theory, it is minimum that organic pollutant content in the water outlet is dropped to, and removes SS, BOD, COD, NH effectively ₃-N, intestinal bacteria etc.Because the membrane filtration effect makes as clear as crystal, the no suspended substance of stable effluent quality (CJ25-1-89), every index all be better than " miscellaneous domestic water quality standard " but direct reuse.Especially the utility model technology is that hollow-fibre membrane with polythene material directly is submerged in bio-reactor under water, simple structure, operation make things convenient for, energy consumption is less, the integral type hollow-fiber membrane bioreactor can replace reuse water processing units such as aeration tank in the traditional activated sludge process technology, settling tank and later coagulation, precipitation, filtration, absorption, sterilization, can obtain high-quality effluent quality equally.

The utility model is arranged on the top of aeration tube with hollow fiber film assembly, by aeration form to film surface shear power and turbulent fluctuation, suspended solids is difficult to attached to the film surface.

Simultaneously, the hollow fiber film assembly periodic running goes out pump working 9min, stops 2min, so circulation, when film is in off working state, utilize aeration power to wash away the cleaning face, it is stable to reduce concentration polarization, improve the service efficiency of hollow fiber film assembly, to reduce cost, reduce frequency of maintenance, improve level of automation of the present utility model.

High-performance of the present utility model shows:

1, can carry out solid-liquid separation efficiently, separating effect is much better than traditional settling tank, and effluent quality is good, go out water suspension and approach zero, but direct reuse has been realized sewage recycling.

2, the film effect of efficiently damming is trapped in the reactor microorganism fully, has realized short and long the separating fully of sludge age (STR) of the reactor waterpower residence time (HRT), and operation control is stablized more flexibly.

3, the microorganism concn height in the reactor, anti impulsion load, stable effluent quality.

4, help breeding holding back, grow and breeding of nitrifier slowly, the nitrification efficiency of system is improved, so ammonia nitrogen removal is good, and the change by operational conditions has good removal function to nitrogen, phosphorus.

5, mud is long age, and membrane sepn makes the macromole difficult degradation composition in the sewage, and enough residence time are arranged in the bio-reactor of finite volume, thereby is decomposed into less molecule, has improved the degradation efficiency of hardly degraded organic substance greatly.Reactor is at high volumetric loading, low sludge loading, long mud under age operation can realize basic discharged without residual mud.

6, system adopts PLC control, can realize full process automatization control, need not the professional, convenient management.

7, floor space is little, processing unit is concentrated.

8, energy consumption working cost (containing the film replacement charge) exceeds approximately 30% than traditional activated sludge process height, energy consumption, and working cost exceeds about 23%.The one-time investment expense is low 2.78 times (to build 800m than traditional technology ³/ d sanitary sewage disposal factory is an example).

Description of drawings

Accompanying drawing is a kind of structural representation of the present utility model.

Among the figure, 1 grid, 2 anoxic pond, 3 Aerobic Ponds, 4 hollow fiber film assemblies, 5 aerating systems, 6 gas are put forward the mud return-flow system, and 7 go out water pump, 8 differential manometers, 9 emission flow meters, 10 liquidometers.

Specific embodiment

The utility model mainly is made up of biological reaction tank and hollow fiber film assembly 4.Biological reaction tank has two: one is Aerobic Pond 3 for 2, one of anoxic pond, is complete hybrid activated sludge reaction pond, and the useful volume ratio is 1: 4.Aerobic Pond 3 built-in hollow fiber film assemblies 4, membrane module 4 is divided into aerating system 5, and water-gas ratio is 1: 40.Go out water pump 7 and adopt intermittent operation, the suction frequency is stopped 2min for opening 9min.Differential manometer 8 is used to monitor the variation of hollow fiber film assembly 4 filtration resistances.Liquid level is constant in the liquidometer 10 control Aerobic Ponds 3, and emission flow meter 9 is used to measure hollow fiber film assembly 4 aquifer yields, and gas is put forward mud return-flow system 6 Aerobic Pond 3 active sludge is mentioned in the anoxic pond 2.

Technical process is that sewage is introduced into equalizing tank, promote by pump then and enter anoxic pond 2 through grid 1, the little aeration in this pond, to keep in the sewage dissolved oxygen between 0.2～0.5mg/L, make hydrolysis acid-producing bacteria growth and breeding under anoxic condition, with insoluble in the sewage and the organism water dissolution that is difficult to aerobic biodegradation is solvability and the organism that is easy to degrade, and helps the degraded and the digestion of organic sludge in the follow-up aerobic processes.Enter Aerobic Pond 3 then, the organism in the sewage is decomposed by a large amount of Institute of Micro-biology, and mixed solution through entering the hollow-fibre membrane endoporus after the millipore filtration on hollow-fiber module 4 membranous walls, is discharged outside the pond and promptly obtained treating water under the suction function that goes out water pump 7.

Claims

1, integral type film biological reactor comprises the Aerobic Pond that is provided with aeration tube, it is characterized in that being provided with in Aerobic Pond hollow fiber film assembly.

2,, it is characterized in that hollow fiber film assembly is arranged on the top of aeration tube according to the described reactor of claim 1.

3,, it is characterized in that hollow fiber film assembly is the intermittent type water outlet according to the described reactor of claim 2.