CN2405929Y

CN2405929Y - Integrated membrane biological reaction apparatus

Info

Publication number: CN2405929Y
Application number: CN98225338U
Authority: CN
Inventors: 顾国维; 吴志超; 孙卫明; 张明旭
Original assignee: Tongji University; Fudan University
Current assignee: Tongji University; Fudan University
Priority date: 1998-10-14
Filing date: 1998-10-14
Publication date: 2000-11-15
Anticipated expiration: 2008-10-14

Abstract

The utility model relates to an integrated membrane biological reaction apparatus, which is formed by combining a regulating tank, an aeration tank and a sludge domestication tank as integration. The utility model is provided with a sewage biological treatment apparatus, a membrane separation apparatus, a back flushing apparatus, an aeration apparatus and a cleaning apparatus, and the utility model not only has sewage efficient processing performance but also has an automatic maintenance and clean function for a membrane. A membrane assembly is made of polypropylene hollow fibers, the phenomenon of large-scale filament breakage is not easy to occur, the service life of the membrane assembly is long, and water treatment effects are good. The occupation area of the integral sewage biological treatment apparatus is small, a plurality of connecting pipelines can be saved, and the utility model is convenient for the operation and the management of operating staffs.

Description

Integral membrane biological reaction equipment

Integral membrane biological reaction equipment relates to the water treating equipment manufacturing technology.

Existing integral membrane biological reaction equipment is that the separating film module of being made by polyethylene material tubular fibre is directly installed in the bio-aeration pool, suction by water pump makes the hollow-fibre membrane inner chamber produce vacuum state, to collect by the tunica fibrosa chamber through the water that microbiological treatment is crossed, import the header output.Though it is big that polyethylene material tubular fibre has voidage, the advantage that water flux is high, but its elasticity is relatively poor, product is subjected to external impacts in long-time running or in the transportation installation process, occurs the fracture of wire phenomenon easily, particularly in operational process, behind a large amount of fracture of wires, the fracture of wire fiber can twine haves mercy on other tunica fibrosa, has created condition for microorganism growth in blocks, agglomerating, finally causes the rapid decline of membrane flux.

Simultaneously, existing integral membrane biological reaction equipment is not considered the periodic purge and the recoil measure of film.In integral membrane biological reaction equipment, the type of film belongs to micropore filtering film, and the effect of membrane module mainly is a solid-liquid separation, microorganism is trapped in the aeration tank fully, and organic degraded depends on action of microorganisms.Although the decomposition of a large amount of microorganism commute degradable chemicals is very complete in the membrane bioreactor, but always have the fiber lumens that epidermis that the undecomposed organism completely of small part sees through film enters film, on internal chamber wall, slowly spread growth under certain condition, from the long-time running angle, the mistake water resistance of film inner chamber can increase gradually, causes the water production rate of film to decay gradually.If misoperation or productivity accident take place, severe contamination appears in film, and water production rate descends significantly, and it will very big depending merely on its workload of artificial cleaning, and effect can't guarantee, but needs the film cleaning engineering measure of a cover actually operating.

In addition, in existing equipment design, do not consider of the maintenance of initial operating stage culturing sludge domestication stage to membrane module.At this moment, microorganism in the bio-aeration pool does not grow as yet, have many readily biodegradables in the water and still undegradable organism enters the inner chamber of tubular fibre by the epidermis hole of film, cause under the certain condition microorganism in the ramp of film inner chamber, making film forming permeable resistance increases, after changing normal operating condition over to, therefore the water production rate of film also can occur obviously descending, and has shortened the work-ing life of membrane module.

In order to overcome existing integrated film biologic reaction equipment deficiency, the utility model proposes the membrane module that adopts the hollow-fibre membrane be difficult for fracture of wire to make, all membrane modules are installed in the frame mounting, the aeration tank can freely be put into or take out to this frame mounting, is provided with the integrated film biologic reaction equipment of sludge acclimatization pond and film maintenance clean device in the equipment.

The utility model is to constitute like this, and membrane module adopts through the polypropylene material hollow-fibre membrane of surface hydrophilic treatment measures and makes, and hollow-fibre membrane epidermis aperture is 0.03-0.5 μ.Be provided with equalizing tank, aeration tank, domestication pond and service sink in the equipment.The aeration tank can be provided with several according to sewage load, membrane module is installed in the frame mounting, and this framework is placed on the middle and upper part of aeration tank, each membrane module connects to form relatively independent suction unit and gas or water backwashing device by pipeline, valve and suction pump and air compressor or backwashing pump respectively, gas blower is communicated with the formation aerating apparatus by pipeline and valve with aeration tank, culturing sludge domestication pond, and the gas blower operation scheme is operation continuously.Chemical cleaning solution is mainly deposited in the matting pond, and service sink is communicated with aeration tank, domestication pond (clean water basin of holding concurrently) by pipeline, valve and in-line pump,

The characteristics of the utility model integral membrane biological reaction equipment are: hold concurrently clean water basin and matting pond of aeration tank, sludge acclimatization pond is combined into one, take up an area of few, convenient operation and management.Adopt the good polypropylene hollow fiber membrane of elastic performance to make membrane module, in the clean and maintenance process of long-time running, equipment transportation installation and film, be difficult for the fracture of wire phenomenon of occurrence of large-area, the long working life of membrane module, the water treatment efficiency height, effluent quality is good.Being provided with culturing sludge domestication pond in equipment makes the mud of domestication fully can in time be delivered to the aeration tank easily to guarantee the quality of water treatment.Air or clear water back-purge system can often carry out the back flushing cleaning to membrane module, avoid the accumulation of mud or microorganism on the film surface, the certain water production rate that keeps film, washing unit then can in time laborsavingly be removed film inner chamber organic pollutant easily, make keep clean in the tubular fibre chamber of membrane module unimpeded.

Accompanying drawing is one of the utility model embodiment, and the utility model will be further described in conjunction with the accompanying drawings.

Fig. 1 the utility model structural representation

The utility model is provided with equalizing tank 1, aeration tank 2, domestication pond 3, service sink 4.Water entering section at equalizing tank 1 is provided with coarse rack 5, fine fack 6.When entering equalizing tank 1, removes in sewage the foreign material in the water earlier.Water in the equalizing tank is squeezed into aeration tank 2 (error-free running period) or domestication pond 3 (sludge acclimatization cultivation stage) through piping 7 by water pump.Aerated conduit is placed in the bottom of aeration tank 2, and membrane module 13 is arranged on the top of aeration tube 9 in the aeration tank 2.Membrane module 13 is formed suction unit with pipeline 8, suction water pump 11, outfall sewer 12, simultaneously, and by pipeline 8,14 and air compressor or backwashing pump 15 composition back-purge systems.Aeration tube 9 is formed aerating apparatus with gas blower 10, is distributed in the bottom in aeration tank 2 and culturing sludge domestication pond 3 respectively.When culturing sludge is tamed, aeration tank 2 bottom air closedown of pipeline, culturing sludge domestication pond bottom air pipeline is opened; And when normally moving, aeration tank 2 bottom air pipelines are opened, culturing sludge domestication pond bottom air closedown of pipeline.Service sink 4 is connected with aeration tank 2, culturing sludge domestication pond 3 by pipe connecting 16, in-line pump 17.

When the utility model normally moves, the sewage of equalizing tank 1 is squeezed into aeration tank 2 by pump through pipeline 7, organism in the sewage is degraded by microorganisms, because the effect of suction water pump 11, membrane module 13 and pipeline 8 are vacuum state, the water that purified enters pipeline 8 by the hole of film epidermis, and compiles into outfall sewer 12 and discharge.Suction water pump 11 periodic runnings when stopping, washing away the film surface by the vigorous agitation that aeration produces, and prevent film surface adhesion mud.In the sludge acclimatization stage, sewage is squeezed into domestication pond 3 by pump and is carried out culturing sludge domestication in the equalizing tank 1, changes aeration tank 2 over to by in-line pump 17 finishing after, and at this moment, sewage directly enters aeration tank 2, and the air line of aeration tank 2 is opened, and tames the air line in pond 3 and closes.

Suction pump 11 periodic runnings, when the water flux of film during less than design discharge, at suction pump 11 intervals, sewage stops to enter, suction pump 11 and pipeline 8 are by the valve automatic opening, air compressor or backwashing pump 15 and pipeline 8 are from being dynamically connected, and air or clear water carry out back flushing to membrane module 13, after back flushing finishes, air compressor or backwashing pump 15 and pipeline 8 automatic openings, suction pump 11 and pipeline 8 reconnect, and sewage reenters, and change normal operation over to.And, then carry out matting when the flux forever of film during less than the minimum water production rate of design.Operating process is as follows, at first, sewage stops to enter, suction pump 11 and pipeline 8 are by the valve automatic opening, air compressor or backwashing pump 15 and pipeline 8 automatic switching ons, air or clear water carry out back flushing to membrane module 13, after back flushing finishes, and air compressor or backwashing pump 15 and pipeline 8 automatic openings.Then, tame the emptying valve opening in pond 3, close after water is drained, the valve pipeline in aeration tank 2 and sludge acclimatization pond 3 is open-minded, by in-line pump 17 active sludge intermixture is squeezed into sludge acclimatization pond 3, and pipeline disconnects after finishing, aeration tank 2 emptying valve openings are with the excess sludge emptying.Then, the pipeline of aeration tank 2 and service sink 4 is opened, by in-line pump 17 scavenging solution is pumped into aeration tank 2, disconnect the connecting pipeline of aeration tank 2 and service sink 4 after finishing, suction pump 11 and pipeline 8 are communicated with again, suction pump 11 operations are filtered scavenging solution and are got to service sink 4 by membrane module 13, be lower than a half of membrane module height when water level, suction pump 11 is out of service, and aeration tank 2 emptying valves reopen, surplus solution emptying, at last, mud mixed liquid in the domestication pond 3 is squeezed into the aeration tank by in-line pump 17, and sewage reenters, and device changes normal operation over to.When the aeration tank surpasses two, can clean in turn, sewage load is big more, and the utilization ratio of washing unit is high more.The control of the utility model entire work process is divided into manually and two kinds of electric automatic control.

Claims

1. integral membrane biological reaction equipment comprises equalizing tank (1), aeration tank (2), the double clean water basin (3) of culturing sludge domestication, service sink (4), grid (5), (6), pipeline (7), (8), (14), (16), membrane module (13), gas blower (10), suction pump (11), outfall sewer (12), air compressor or backwashing pump (15), aeration tube (9), in-line pump (17) is characterized in that: aeration tank (2), the culturing sludge instructionization clean water basin (3) of holding concurrently, service sink (4) is combined into one; Membrane module (13) is that the polypropylene hollow-fibre membrane of 0.03～0.5 μ is made by film epidermis aperture, be arranged on the interior aeration tube in aeration tank (2) (9) top, connect to form back-purge system and washing unit by connecting tube (8), (14) and air compressor or backwashing pump (15) and clean water basin (4).