CN101108760B

CN101108760B - Continuous Microfiltration processing technique of regenerated water

Info

Publication number: CN101108760B
Application number: CN200610106598A
Authority: CN
Inventors: 俞义凡
Original assignee: XIAMEN ZHONGLIANHUAN ENVIRONMENTAL CONSERVATION ENGINEERING Co Ltd
Current assignee: CHINA UNION ENGINEERING CO., LTD.
Priority date: 2006-07-19
Filing date: 2006-07-19
Publication date: 2010-05-12
Anticipated expiration: 2026-07-19
Also published as: CN101108760A

Abstract

The invention discloses the recycled water continuous micro-filtration treatment process. The process uses the tail water of the biochemical effluent as the source water which passes through the swirling flow congealed reaction tank and the horizontal-flow multibucket sedimentation tank to settle and then enters the middle water tank, and is sent to the continuous micro-filtration system (including the multi-media filter system and the membrane treatment system) by a lift pump to carry out advanced treatment and then enters a disinfecting tank to disinfect and is added with chlorine dioxide with right amount to meet the requirement of the recycled water on the chloride, and finally flows in a storage tank for use. The treatment process is advanced in technology, free from noise, high in degree of automation, convenient in management, stable in operation, low in cost and good in outlet water quality. In addition, the sludge can be used as the greening fertilizer.

Description

Continuous Microfiltration processing technique of regenerated water

Affiliated technical field

The present invention relates to a kind of improvement of reused water processing technology, it is applicable to the regeneration of municipal effluent.Can be back to greening, view moisturizing and dash and spill water.

Technical background

The sewage in city produces in large quantities, how properly to be handled and utilized and become the significant problem that people are concerned about, therefore the someone proposes the improvement project of correlation technique incessantly, for example earlier sewage is sent in the enzymatic living beings filtration unit about proposing in " a kind of technology and specific equipment that utilizes sewage to produce reuse water " for Chinese patent CN200410024576.8 number, contact and residual pollutent in the degradation water through enzymatic lithotroph filter material layer and the air liquid phase that blasts of device bottom from top to bottom, residual gas is discharged by top, water is discharged by the bottom and is entered by last floating filtration unit bottom, from bottom to top the suspended substance that is trapped through enzymatic lithotroph filter material layer is stayed the bottom row for the treatment of, water is discharged through top, add the ozone sterilization sterilization, get reuse water, described specific equipment is enzymatic living beings filtration unit and last floating filtration unit, though its structure is simple, but operation acquires a certain degree of difficulty, and effect also remains further to be improved.

Summary of the invention

Task of the present invention is that a kind of continuous Microfiltration processing technique of regenerated water will be provided, this process using modern technique, and the level of automation height, noise is little, convenient management, working cost is low, stable, and effluent quality is good, and rubbish and mud can digest and utilization of waste material voluntarily.

Task of the present invention is finished in such a way, this continuous Microfiltration processing technique of regenerated water is as source water with the tail water of bio-chemical effluent, owing to contain certain SS, phosphorus etc. in the bio-chemical effluent, need add coagulated agent, impel the SS precipitation in the sewage, the cyclone reaction pond is exactly the structures with sewage and coagulated agent thorough mixing, reaction.For buried sewage treatment project contentedly, adopt the advection multi-bucket sedimentation basin, after having reached the sewage first discharge standard through the materialization post precipitation, sewage pump in the intermediate pool rises to sewage in continuous Microfiltration (CMF) system and carries out advanced treatment, after a small amount of suspended substance dams through filter tank in the multi-medium filtering jar earlier, suspended solid in the water outlet, turbidity all obviously reduces, wherein turbidity can be reduced to 5NTU, suspended solid is reduced to below the 5mg/L, handle through film again, the pore size filter of film processing system is 0.18 micron, the water outlet suspended solid can be reduced to below the 1mg/L, turbidity can be reduced to below the 0.1NTU, the major function of this system is bacterium and the coliform of thoroughly removing in the water, the coliform of water outlet is zero, and total plate count is lower than 1CFU/ML, this filtering system is also having significant effect aspect the removal dissolved matter, wherein the BOD value of water outlet can detect below the line minimum, through the reuse water after continuous Microfiltration (CMF) system handles, need enter disinfecting tank carries out disinfection, drop into ClO 2 solution and satisfy the requirement of reuse water chlorine residue, to guarantee that water outlet is about the chlorine residue of pipe network end is greater than 0.2mg/L, flow into then in the reuse water storage pond for using, mud in the advection multi-bucket sedimentation basin then is promoted to sludge thickener, the supernatant liquor on top can be used as greening fertilizer and uses after enter the sewage overflow pipeline, mud concentrates.

Description of drawings

The present invention is further illustrated below in conjunction with accompanying drawing.

Fig. 1 is a continuous Microfiltration processing technique of regenerated water schema of the present invention.

Embodiment

Can find out obviously that from process flow sheet this continuous Microfiltration processing technique of regenerated water mainly is divided into following several stages:

1, Yuan Shui: it is that every index of these tail water has all reached integrated wastewater discharge standard with the tail water of the bio-chemical effluent source water as reuse water.

2, cyclone coagulation reaction tank: because bio-chemical effluent contains certain SS, phosphorus etc., need to drop into coagulated agent, impel the SS precipitation in the sewage, the cyclone reaction pond is with sewage and coagulated agent thorough mixing, the structures of reaction, it is characterized in that making full use of hydraulic characteristics, do not need stirrer, sewage is mixed, reacts with medicament fully.

3, advection multi-bucket sedimentation basin: for buried sewage treatment project contentedly, adopt the advection multi-bucket sedimentation basin, the a small amount of mud that can the rapid precipitation materialization produces, each bucket is equipped with sludge pump, can in time enter mud in the sludge thickener, its top supernatant liquor is from entering the sewage overflow pipeline, and mud reaches minimizing and is treated as high-quality greening fertilizer through concentrating.

4, intermediate pool: in this pond, sewage pump is housed, can rises to continuous Microfiltration (CMF) system to the sewage that has reached first discharge standard in the integrated wastewater discharge standard requirement through the materialization post precipitation and carry out advanced treatment.

5, multi-medium filtering system: in the multi-medium filtering jar filler is housed, filtering velocity is 12m ³/ m ²H, vent valve is equipped with on hay tank top, can be discharged from when in the tank body gas being arranged, and the main body of tank body is A ₃Steel construction, inside and outside to add intensity level anticorrosion; Under normal situation, three intermediate pool respectively have 2 submersible pumps (1 usefulness 1 is equipped with), when hay tank needs back flushing, by the adjustment valve, carry out back flushing by backwash pump, and suitably adjusting the intensity that valve reaches back flushing is 15L/S.m ²Backwashing period will be determined according to pressure, the difference (greater than 0.02MPa) that can read by the tensimeter that is installed in the hay tank water inlet pipe and water outlet pipe in operating process determines whether and will wash, the back flushing water outlet directly enters the sewage water inlet pipe road, according to water level control, when CMF circulatory pool low-water level, start working by filtration pump by the reuse water central controller for the start-stop of water pump, when high-water, filtration pump quits work; And molten medicine, medicine system will be used for the dissolved solids coagulating agent, and medicine is rendered to the desired position.

6, film processing system: it is by topping-up pump, hollow-fibre membrane system, pressurized air and back-purge system, and the PLC robot control system(RCS) is formed; The salient features and the parameter of hollow-fibre membrane system are as follows: the turbidity of filter back water quality is less than 1.0NTU, and total plate count is less than 1CFU/ml, and coliform group count is less than 3/L, and pore size filter is 0.18 micron; The operation of film processing system is controlled automatically by PLC, water is by permeating in the export-oriented film of film, service pressure is 30～100Kpa, reach as high as 200KPa, reach as high as 200KPa, generally once with the pressurized air back flushing, pressurized air and water act on the film surface simultaneously during back flushing, time is 1～2 minute, when influent concentration was unstable, film pollutes the setting index that surpasses it can force flushing automatically, to prolong the work-ing life of film, the back flushing water yield (back flushing employing reuse water) is 8%～10% of a flooding quantity, when reaching 100KPa, the front and back of film pressure difference need carry out matting, but the general non-stop run of film treating processes one month, and the CMF system design is a modular designs, be easy to increase-volume, submodule in the module can be changed, isolate, repair,, also can in time repair even therefore film has damage, do not influence the normal operation of total system, the working condition of film can be carried out integrity test.

7, disinfecting tank: the reuse water through after the CMF system handles, need enter sterilization pool and carry out disinfection, throw in ClO 2 solution and satisfy the requirement of reuse water, to guarantee that water outlet is about the chlorine residue of pipe network end is greater than 0.2mg/L chlorine residue.

8, reuse water storage pond: last reuse water after treatment flows in the reuse water storage pond and uses for producing.

This continuous Microfiltration processing technique of regenerated water is that tail water with bio-chemical effluent is as source water, in the cyclone reaction pond with sewage and coagulated agent thorough mixing, enter the advection multi-bucket sedimentation basin after the reaction, each bucket all is equipped with sludge pump, they in time enter sludge thickener with mud, upper clear supernate is from entering the sewage overflow pipeline, reaching minimizing after mud concentrates handles, enter intermediate pool through the materialization oettIed sewage, lift pump promotes sewage to deliver to and carries out advanced treatment in the continuous Microfiltration system, suspended matter is held back in the multi-medium filtering jar earlier, the suspended solid and the turbidity of water outlet descend significantly, turbidity is reduced to 5NTU, suspended solid is reduced to below the 5mg/L, pass through film processing system again, the pore size filter of film is 0.18 micron, the water outlet suspended solid can be reduced to below the 1mg/L, turbidity is reduced to below the 0.1NTU, the intestinal bacteria of water outlet are zero, total plate count is lower than 1CFU/ml, dissolved matter also is removed, enter through the reuse water of continuous Microfiltration (CMF) system handles that disinfecting tank carries out disinfection and drop into ClO 2 solution in right amount to satisfy the requirement to chlorine residue, to guarantee that water outlet is about the chlorine residue of pipe network end is greater than 0.2mg/L, last reuse water flows in the storage pond for using, this continuous Microfiltration processing technique of regenerated water is by setting up successive check, guarantee that water outlet is up to standard, sewage is through coagulation, precipitation, filter, especially membrane treatment process, can hold back bacterium, and membrane treatment process is to adopt cross-current type to filter, make treatment effect not be subjected to the influence of influent quality, and structure design helps replacing and the increase-volume that film is formed flexibly, utilize empty G﹠W that filter membrane is carried out the associating back flushing simultaneously, improve the work-ing life of membrane separating effect and membrane module, can the complete test of online film, at any time all can guarantee effluent quality, employing includes trouble diagnosis, the fully automatic operation of assurance system, the automatization cleaning technique has guaranteed the CMF long-term stable operation; Because the reuse water equipment of selecting for use all is low noise, between daytime≤50db, night≤40db; Treatment process is realized automatization, adopts advanced tubular fibre film processing system, and managerial personnel are few, and required pressure is low, and power consumption is little, and the sterilization expense is low, and the reuse water working cost is 0.5 yuan/m ³, system is stable, and the water quality of water outlet is good, can be used for greening, view moisturizing in a large number, dash and spill water, saves tap water, really accomplishes economic circulation, and mud can be used as greening fertilizer after treatment and uses.

Claims

1. continuous Microfiltration processing technique of regenerated water, it is characterized in that: it with the tail water of bio-chemical effluent as source water, in the cyclone coagulation reaction tank with sewage and coagulated agent thorough mixing, enter the advection multi-bucket sedimentation basin after the reaction, each bucket all is equipped with sludge pump, they in time enter sludge thickener with mud, advection multi-bucket sedimentation basin top supernatant liquor is from entering the sewage overflow pipeline, reaching minimizing after mud concentrates handles, enter intermediate pool through the materialization oettIed sewage, lift pump promotes sewage to deliver to and carries out advanced treatment in the continuous Microfiltration system, suspended matter is held back in the multi-medium filtering jar earlier, the suspended solid and the turbidity of water outlet descend significantly, turbidity is reduced to 5NTU, suspended solid is reduced to below the 5mg/L, pass through film processing system again, the pore size filter of film is 0.18 micron, the water outlet suspended solid is reduced to below the 1mg/L, turbidity is reduced to below the 0.1NTU, the intestinal bacteria of water outlet are zero, total plate count is lower than 1CFU/ml, dissolved matter also is removed, enter through the reuse water of continuous Microfiltration system handles that disinfecting tank carries out disinfection and drop into ClO 2 solution in right amount to satisfy the requirement to chlorine residue, with guarantee water outlet in the chlorine residue of pipe network end greater than 0.2mg/L, last reuse water flows in the reuse water storage pond for using, its processing technological flow is divided into 8 stages, 1, source water, 2, the cyclone coagulation reaction tank, 3, the advection multi-bucket sedimentation basin, 4, intermediate pool, 5, the multi-medium filtering jar, 6, film processing system, 7, disinfecting tank, 8, disinfectant joins the reuse water storage pond.