CN1382651A - Process for comprehensively treating sewage - Google Patents

Abstract

A process for treating organic sewage includes removing solid impurities from sewage by an efficiency solid-phase interceptor as the first stage, non-mud biological treating (BMS) with more than 80 floras, and physiochemical treating (HYDROX) by mechanically generating hydroxy free radicals, and chemical oxidization of pollutants. Its advantage is no residual mud.

Description

A kind of process for comprehensively treating sewage

The present invention relates to a kind of sewage water treatment method, more than 80 kind of flora of particularly a kind of BMS of utilization do not have the processing city domestic sewage that the sludge organism sewage disposal technology combines with HYDROX device sewage physicochemical treatment technology, the process for comprehensively treating sewage of industrial organic waste water.

Municipal wastewater often adopts the second-stage treatment system, mainly based on biological treatment.Method commonly used has Wastewater Treated by Activated Sludge Process system (conventional activated sludge method, AO method, AB method, oxidation ditch process etc.), biomembrance process treatment system, stabilization pond and land treatment system.The municipal wastewater recycling processing system generally is to adopt physics, chemistry or biological process denitrogenation after municipal wastewater second-stage treatment system; Chemical method or biological process dephosphorization; Micro-content organism is removed in ozone or charcoal absorption; Ozone oxidation or chlorination process are removed pathogenic bacteria and virus etc.After advanced treatment, make water outlet reach reuse standard.Adopt conventional second-stage treatment system and municipal wastewater recycling processing system, the main problem that exists has: 1. have foreign odor in sewage and sludge handling process, the running environment poor hygienic.2. operational administrative complexity, in service being prone to such as unusual phenomenoies such as sludge bulking or sludge blockage.3. need establish the residual active sludge treatment system and handle, system's investment and working cost height.4. treatment effect is general, and floor space is big.For high-concentration industrial organic waste water, the high concentrated organic wastewater of biodegradability difference particularly, conventional treatment method has coagulation, A/O biochemical treatment, membrane sepn, extraction, burning etc.Ubiquitous problem is: reach emission request, and cost of investment and working cost height, extremely uneconomical.Cost of investment and working cost are in comparatively economic scope, and intractability is big, and processing efficiency is low, is difficult to reach emission standard.Chinese patent ZL97105747 has introduced a kind of " method for the treatment of city waste water ", is to utilize chlorine to carry out sewage disposal, has the defective of narrating previously equally.

The object of the present invention is to provide a kind of system automation degree height, management is simple, and floor space is little, need not to be provided with the excess sludge treatment unit, investment and running cost are lower, the processing efficiency height, especially it is poor to be fit to biodegradability, COD height, the process for comprehensively treating sewage of the organic industrial sewage that SS is low.

The object of the present invention is achieved like this: a kind of process for comprehensively treating sewage comprises one-level processing and secondary

Handle, it is characterized in that one-level handles that to adopt solid formation efficiently to block to carry a device, second-stage treatment be more than 80 kinds of floras not to be had the sludge organism technology (being called for short BMS) of disposing of sewage produce hydroxy radical qiao OH with mechanical energy ^*The materialization treatment technology of chemical oxidation pollutent (being called for short HYDROX) combines, and the sewage disposal flow process is: sewage at first enters solid formation and efficiently blocks a year device, enters the BMS stage behind the intercepting impurity, handles the back water outlet by HYDROX at last.Solid formation efficiently blocks and carries device is gravity continuous conveyor filter, sewage at first passes through gravity continuous conveyor filter, containing the suspended substance of a large amount of larger particles and floating matter and part SS in the sewage is trapped, trapped substance is outward transport after the solid formation automatic collecting device is collected, flow by gravity entered BMS biological regulating reservoir four lattice branch ponds after sewage dammed after filtration, first three lattice is the three-phase fluidization biological reaction tank, all adorn special multiple genus BMS bacterium in the bio-oxidation pond, filler and suspension type biological grower and efficient little aeration tube, treatment step is: a, fermentation vat: the sewage after damming after filtration enters fermentation vat, utilize more than the 80 kind of microorganism species of cultivating, reduce BOD and COD in the water; B, decomposing pool: the fermentation vat water outlet enters decomposing pool, utilizes liquid biological agent, cultivates surging bacterial classification, decomposes and eliminates fermented material and general harmful mushroom; C, digester: the decomposing pool water outlet enters digester, cultivates a large amount of coccuses by reconciling, eat various corruption things of digestion and bacillus, and d, outlet sump: after the digester water outlet entered outlet sump, further aeration biochemical was handled after flow by gravity enters intermediate pool.Establish water-level alarm device and automatic control system in the pond, treatment step is: water level is lower than lowest water level, and the HYDROX working barrel is self-closing, is higher than designated water level, opens pump automatically; The intermediate pool water outlet enters the HYDROX reactor after the pressurization of HYDROX working barrel convection cell, deceleration, make fluid through overdraft and decompression process, cause the expansion of cavitation erosion, bubble, when bulging force during greater than the fluidic surface tension, explosion takes place in moment in trickle bubble, water crack is situated between produces the OH* of hydroxy radical qiao group, the oxidable decomposing organic matter of strong oxidizer hydroxy radical qiao generates final product CO ₂And H ₂O, sterilization and disinfection; C, when Dang Shui leaves reactor, a part is discharged by outlet valve, and most of liquid recirculation also enters pump intake and handles once more, because the recirculation of liquid, thereby increased the residence time of fluid, to improve the degradation rate of HYDROX device to objectionable impurities at reactor; D, water outlet can rely on self pressure behind the HYDROX device, enters city planting ductwork or reuse promptly as the backwashing water of gravity continuous conveyor filter.

The invention has the beneficial effects as follows: because one-level handle to adopt advanced technology, solid formation device for trapping gravity continuous conveyor filter that level of automation is high, interception efficient height, the solid formation water ratio is low, can save the dewatering unit in the conventional process system.The BMS biological regulating reservoir both can balanced water quality and quantity, part that can be removed COD and most of SS again, and by special BMS bacterium digestion denitrogenation dephosphorizing and oxygenolysis organism, the shock absorbing load can be guaranteed the normal running conditions of follow up device.The BMS biological treatment equalizing tank SS of system clearance 〉=80%, simultaneously by biofloculation, the insoluble organism of bio-oxidation, guarantee one-level treatment S S clearance 〉=82%, the COD clearance is about this 30-40%, the BMS biological regulating reservoir does not have excess sludge and discharges, so a whole set of technology need not to be provided with sludge treatment equipment, treatment system investment and running cost are low.HYDROX physical reaction device relies on to produce strong oxidizer hydroxy radical qiao oxygenolysis organism and various reducing substances, sterilization and disinfection, and the COD of HYDROX system clearance 〉=85% can be utterly destroyed pathogenic agent.The treating processes odorless, tasteless, the environmental health condition is good.

Embodiment: a kind of process for comprehensively treating sewage, comprise one-level processing and second-stage treatment, it is characterized in that one-level processing employing solid formation efficiently blocks a year device, second-stage treatment is that more than 80 kinds of floras are not had sludge organism sewage disposal technology (being called for short BMS) and mechanical energy generation hydroxy radical qiao OH ^*The materialization treatment technology of chemical oxidation pollutent (being called for short HYDROX) combines, and the sewage disposal flow process is: sewage at first enters solid formation and efficiently blocks a year device, enters the BMS stage behind the intercepting impurity, handles the back water outlet by HYDROX at last.

Because sewage source complexity.Efficiently block a year device so need establish solid formation, to guarantee the normal operation of aftertreatment device.Adopt the high gravity continuous conveyor filter of high-efficient automatic degree to replace grid device.Sewage at first passes through gravity continuous conveyor filter, contains the suspended substance of a large amount of larger particles and floating matter and part SS in the sewage and is trapped, and removes above-mentioned substance water pump assembly and subsequent disposal structures are had important provide protection.Trapped substance is outward transport after the solid formation automatic collecting device is collected, DZ-0.7-500 type gravity continuous conveyor filter adopts the Germany technology that is applied to sewage disposal, filter rejection height, and the solid formation water ratio of collection is low, dewatering unit need not be set, and gleanings can directly be transported outward.Sewage filters the back flow by gravity by the band filter and enters the BMS biological regulating reservoir.When water quality and quantity in the sewage quantity one day changes greatly, need the design equalizing tank, equalizing tank is one of main source of foreign odor generation.Be provided with efficient micro-pore aeration equipment in the BMS biological regulating reservoir, special multiple genus BMS bacterium and suspension type biological grower, three-phase fluidization biological reaction tank for particular design, the particular design of in the pond because aeration tube position and aeration rate makes and produces the internal recycle system in the pond, forms certain proportion anaerobism, double oxygen, aerobe district.Sewage in the pond along the system orientation current repeatedly through the A/A/O biological treatment process.The biological growth device is adsorbing organism, the insoluble organism of macromole particularly, and special multiple genus fungal component digests fast, decomposing organic matter.Adopt the BMS biological treatment system as biological regulating reservoir, the both adjustable water saving matter water yield can suppress and the elimination foreign odor by special flora again, and special BMS bacterium has digestion denitrogenation dephosphorizing and the organic effect of oxygenolysis, shock absorbing is loaded, and can guarantee the normal running conditions of follow up device.The BMS biological treatment equalizing tank SS of system clearance 〉=80%, simultaneously by biofloculation, the insoluble organism of bio-oxidation, guarantee one-level treatment S S clearance 〉=82%, the COD clearance is about this 30-40%, this binomial index of BMS biological regulating reservoir effluent quality can effectively be guaranteed normal running conditions and the processing efficiency of HYDROX.The water outlet of BMS biological regulating reservoir enters intermediate pool through flow by gravity, establishes water-level alarm device and automatic control system in the pond, and water level is lower than lowest water level, and the HYDROX working barrel is self-closing, is higher than designated water level, opens pump automatically.The intermediate pool water outlet enters the HYDROX reactor after the pressurization of HYDROX working barrel convection cell, deceleration, make fluid through overdraft and decompression process, causes the expansion of cavitation erosion, bubble.When bulging force during greater than the fluidic surface tension, explosion takes place in moment in trickle bubble, causes partial high temperature can reach (2000k) and high pressure (can reach 200 crust) simultaneously, water crack is situated between produces the OH* of hydroxy radical qiao group, the oxidable decomposing organic matter of strong oxidizer hydroxy radical qiao generates final product CO ₂And H ₂O, sterilization and disinfection, when water left reactor, a part was discharged by outlet valve, and most of liquid recirculation also enters pump intake and handles once more.Since the recirculation of liquid, thus the residence time of fluid increased at reactor, to improve the degradation rate of HYDROX device to objectionable impurities.Water outlet can rely on self pressure behind the HYDROX device, enters city planting ductwork or reuse.The every index of water outlet is lower than emission request, and the COD of HYDROX system clearance 〉=85% can be utterly destroyed pathogenic agent.HYDROX system water part is as intermittent type gravity continuous conveyor filter backwashing water.Treated water-quality guideline: COD＜60mg/L, BOD ₅＜15mg/L, NH ₃-H≤8mg/L, TP≤0.2mg/L, SS≤20mg/L.

Claims (4)

1, a kind of process for comprehensively treating sewage, comprise one-level processing and second-stage treatment, it is characterized in that it is more than 80 kinds of floras not to be had the sludge organism technology (being called for short BMS) of disposing of sewage produce hydroxy radical qiao OH with mechanical energy that one-level handle to adopt solid formation efficiently to block to carry a device, second-stage treatment ^*The materialization treatment technology of chemical oxidation pollutent (being called for short HYDROX) combines, and the sewage disposal flow process is: sewage at first enters efficient solid formation and blocks a year device, enters the BMS stage behind the intercepting impurity, handles the back water outlet by HYDROX at last.

2, a kind of process for comprehensively treating sewage according to claim 1, it is characterized in that it is gravity continuous conveyor filter that described efficient solid formation blocks a year device, sewage at first passes through gravity continuous conveyor filter, containing the suspended substance of a large amount of larger particles and floating matter and part SS in the sewage is trapped, trapped substance is outward transport after the solid formation automatic collecting device is collected, and flow by gravity entered BMS bio-oxidation equalizing tank after sewage dammed after filtration.

3, a kind of process for comprehensively treating sewage according to claim 1, sewage after it is characterized in that damming after filtration enters four lattice branch ponds of BMS bio-oxidation equalizing tank successively, four lattice branch ponds are all the three-phase fluidization biological reaction tank, all adorn special multiple genus BMS bacterium, filler and suspension type biological grower and efficient little aeration tube in the bio-oxidation pond, treatment step is:

A, fermentation vat: the sewage after damming after filtration enters fermentation vat, utilizes more than the 80 kind of microorganism species of cultivating, and reduces BOD and COD in the water;

B, decomposing pool: the fermentation vat water outlet enters decomposing pool, utilizes liquid biological agent, cultivates surging bacterial classification, decomposes and eliminates fermented material and general harmful mushroom;

C, digester: the decomposing pool water outlet enters digester, cultivates a large amount of coccuses by reconciling, and eat various corruption things of digestion and bacillus are not thorough as digestion, can be by the system water flow path direction in above three pond recirculation;

D, outlet sump: after the digester water outlet entered outlet sump, further aeration biochemical was handled after flow by gravity enters intermediate pool.

4, a kind of process for comprehensively treating sewage according to claim 1 is characterized in that the water outlet of BMS bio-oxidation equalizing tank enters intermediate pool through flow by gravity, establishes water-level alarm device and automatic control system in the pond, and treatment step is:

A, water level are lower than lowest water level, and the HYDROX working barrel is self-closing, is higher than designated water level, open pump automatically;

B, intermediate pool water outlet enter the HYDROX reactor after the pressurization of HYDROX working barrel convection cell, deceleration, make fluid through overdraft and decompression process, cause the expansion of cavitation erosion, bubble, when bulging force during greater than the fluidic surface tension, explosion takes place in moment in trickle bubble, water crack is situated between produces the OH* of hydroxy radical qiao group, the oxidable decomposing organic matter of strong oxidizer hydroxy radical qiao generates final product CO ₂And H ₂O, sterilization and disinfection;

C, when Dang Shui leaves reactor, a part is discharged by outlet valve, and most of liquid recirculation also enters pump intake and handles once more, because the recirculation of liquid, thereby increased the residence time of fluid, to improve the degradation rate of HYDROX device to objectionable impurities at reactor;

D, water outlet can rely on self pressure behind the HYDROX device, enters city planting ductwork or reuse promptly as the backwashing water of gravity continuous conveyor filter.