CN111253006A - A hospital wastewater comprehensive treatment device with zero sludge discharge and its treatment method - Google Patents

Abstract

The invention discloses a comprehensive treatment device for hospital wastewater with zero sludge discharge and a treatment method thereof. and chlorine dioxide disinfection pools are connected in series in sequence, and also includes a waste gas treatment module; a cutting pump is arranged in the regulating pool; the waste gas treatment module is composed of plasma equipment and activated carbon adsorption equipment; the multi-stage biochemical pool is composed of multi-stage A unit It is formed in series with the multi-stage O unit and the precipitation unit. Part of the sludge at the sludge outlet of the precipitation unit is returned to the front section of the multi-stage A unit through the sludge return pump and the sludge return pipe, and the remaining part is discharged to the three-grid septic as excess sludge. The water inlet section of the pool; using the present invention, the effluent quality is better than the standard of "Water Pollutant Discharge Standard for Medical Institutions" (GB18466-2016), and has the advantages of not producing excess sludge, grid slag, etc., and no aerosol, sludge, etc. will occur. , grid slag, exhaust gas and other germs infection risks.

Description

A hospital wastewater comprehensive treatment device with zero sludge discharge and its treatment method

technical field

The invention belongs to the technical field of water pollution control, and in particular relates to a comprehensive treatment device for hospital wastewater with zero sludge discharge and a treatment method thereof, in particular to a treatment device for zero discharge of sludge for infectious hospital virus wastewater and the treatment method thereof. its processing method.

Background technique

The quality of hospital sewage is complex. Hospital sewage is mainly comprehensive ward sewage. Hospital sewage contains a large amount of pathogens, disinfectants, organic solvents, thick blood, tissue waste, drugs and detergents, etc. Viruses, parasite eggs and other harmful substances. At present, there are many shortcomings in hospital wastewater treatment methods. Most hospital wastewater is directly disinfected and discharged, and a few are re-sterilized by secondary biological treatment. After sewage well treatment, the concentration of suspended solids is high, and bacteria and viruses are not easily removed by disinfectants because they are attached to suspended flocs. Inactivation, and the existing biochemical treatment device has shortcomings such as weak treatment effect and excessive pretreatment disinfection residual chlorine affecting subsequent biochemical reactions; in recent years, virus epidemics have occurred in some countries in the world, due to the high infectiousness of viruses in infectious disease medical wastewater. There are live viruses in the feces of confirmed patients, and there is a risk of fecal-oral transmission; and the exposed sludge, screen slag, and aerosols generated in the aeration process in the wastewater treatment system also have viruses, and there is a major risk of infection. There is no hospital wastewater treatment device and treatment method with zero sludge discharge, and there is no hospital wastewater treatment device and treatment method that comprehensively considers the spread of virus risk.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems, and to provide a comprehensive treatment device for hospital wastewater with zero sludge discharge and a treatment method thereof, especially for the treatment of infectious hospital virus wastewater.

To achieve the above object, the present invention has adopted the following technical solutions:

A hospital wastewater comprehensive treatment device with zero sludge discharge is composed of a chlorine dioxide disinfection tank, a three-grid septic tank, a regulating tank, a closed ultraviolet sterilizer, a multi-stage biochemical tank, and a chlorine dioxide disinfection tank. It also includes a waste gas treatment module; a cutting pump is arranged in the regulating pool; the waste gas treatment module is composed of plasma equipment and activated carbon adsorption equipment in series; The sedimentation unit is composed of series connection. Part of the sludge at the sludge outlet of the sedimentation unit is returned to the front section of the multi-level A unit through the sludge return pump and the sludge return pipe, and the remaining part is discharged to the water inlet section of the three-grid septic tank as excess sludge. , the multi-level O unit is provided with a fluidized bamboo charcoal fiber filler and suspended sludge.

Each of the sewage treatment equipment described is a closed structure, and the collected waste gas is connected to the waste gas treatment module.

The multi-level A unit includes at least three levels of anaerobic and anoxic pools, and the multi-level O unit includes at least two levels of aerobic pools.

The shape of the bamboo charcoal fiber filler is a porous cylindrical shape, the density is close to that of water, the diameter is 15-30 mm, and the height is 6-10 mm.

The chlorine dioxide disinfection tank is composed of a chlorine dioxide reaction unit and a dechlorination unit in series, and also includes a chlorine dioxide dosing system.

A comprehensive treatment method for hospital wastewater with zero sludge discharge, the method steps are as follows:

(1) chlorine dioxide disinfection tank: after the waste water and feces of the hospital are mixed with the chlorine dioxide agent added by the chlorine dioxide dosing system, they enter the chlorine dioxide reaction unit and the dechlorination unit in turn; in the chlorine dioxide reaction unit , carry out oxidative degradation, sterilization and wastewater disinfection treatment of solid organic matter, improve the biodegradability of organic matter, and reduce sludge at the same time; in the dechlorination unit, the residual chlorine is consumed to prevent the inhibition of subsequent three-grid septic tanks. Microbial activity and growth metabolism; the treated wastewater enters the next-level three-grid septic tank;

(2) Three-grid septic tank: Through the three-grid septic treatment, the feces and sludge are decomposed and fermented step by step, and the total amount of solid organic matter is reduced;

(3) Conditioning tank + cutting pump: Through the cutting pump in the adjustment tank, the paper towels, cloth pieces, fibrous objects and other debris in the wastewater collected in the adjustment tank will be crushed and decomposed, so as to prevent the blockage of the subsequent equipment, and at the same time, it will be upgraded to a closed type UV disinfection. sterilization treatment;

(4) Closed UV sterilizer: The waste water lifted by the cutting pump is sterilized by the closed UV sterilizer, and then enters the multi-stage biochemical tank after treatment;

(5) Multi-stage biochemical tank: After the effluent of the closed UV sterilizer is mixed with the returning sludge, it enters the multi-stage A unit to undergo self-respiration and oxidation of sludge, hydrolysis reduction and sludge denitrification, so as to realize sludge denitrification. The reduced amount of sludge is converted into inorganic sludge; the nitrogen in the incoming water is nitrified and decarbonized by the multi-level O unit, and the multi-level O unit and the fluidized bamboo charcoal fiber filler will remove the carbon bacteria and The nitrifying bacteria are separated in different treatment O units to domesticate specific enhanced microorganisms to realize the enhanced treatment of the multi-stage biochemical tank; the separation of mud and water is realized through the sedimentation unit, and the effluent enters the next-level chlorine dioxide disinfection tank; the sedimented sludge part It is returned to the multi-level A unit as return sludge, and part of it is discharged to the three-grid septic tank as excess sludge for sludge reduction treatment; through the self-respiration oxidation, hydrolysis, sludge denitrification and sludge denitrification of the multi-level A unit The fermentation and degradation of the three-grid septic tank realizes zero discharge of system sludge;

(6) chlorine dioxide disinfection tank: the multi-stage biochemical tank enters the chlorine dioxide reaction unit and dechlorination unit for sterilization and dechlorination treatment, and discharges up to the standard after treatment;

(7) The waste gas collected by the collected treatment equipment is sterilized, detoxified, and deodorized by a series combination treatment process of plasma equipment and activated carbon adsorption equipment, so as to achieve the standard discharge of gas.

By adopting the treatment of the invention, the quality of the effluent is better than the standard of "Water Pollutant Discharge Standard for Medical Institutions" (GB18466-2016), and has the advantages of not producing excess sludge, grid slag, etc., and no aerosol, sludge, grid slag and waste gas will occur. risk of bacterial infection.

Description of drawings

Fig. 1 is the comprehensive treatment process flow of hospital wastewater with zero sludge discharge according to the present invention.

Figure 2 is a schematic structural diagram of a hospital wastewater comprehensive treatment device with zero sludge discharge.

Among them: hospital sewage feces 1, pretreatment chlorine dioxide disinfection tank 2 (chlorine dioxide reaction unit 2-1, dechlorination unit 2-2), septic tank 3, regulating tank 4, cutting pump 5, closed UV disinfection Device 6, multi-stage biochemical tank 7, A1, A2, A3, A4 are four-level anaerobic anoxic units, O1, O2 are two-level aerobic units, suspended bamboo charcoal fiber filler 7-1, suspended sludge 7 -2, sludge return pump 7-3, sludge return pipeline 7-4, excess sludge 7-5, advanced treatment chlorine dioxide disinfection tank 8 (chlorine dioxide reaction unit 8-1, dechlorination unit 8-2 ), up-to-standard discharge sewage 9; collected waste gas M0, plasma equipment M1, activated carbon adsorption equipment M2, up-to-standard waste gas M3; chlorine dioxide dosing system K.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings:

Example 1

Referring to Figure 2, it is a comprehensive treatment device for hospital wastewater with zero sludge discharge. The multi-stage biochemical pool 7 and the chlorine dioxide disinfection pool 8 are sequentially formed in series, and also include waste gas treatment modules (M1, M2); a cutting pump 5 is provided in the regulating pool; the waste gas treatment modules (M1, M2) are composed of plasma equipment. M1 and activated carbon adsorption equipment M2 are connected in series; the multi-stage biochemical tank 7 is composed of four-level A units (A1, A2, A3, A4), two-level O units (O1, O2), and a precipitation unit C in series, and the precipitation unit C is composed of Part of the sludge from the sludge outlet is returned to the front section A1 of the fourth-level A unit through the sludge return pump 7-3 and the sludge return pipe 7-4, and the remaining part is discharged to the three-grid septic tank as excess sludge 7-5. 3, the two-stage O unit (O1, O2) is provided with a fluidized bamboo charcoal fiber filler 7-1 and a suspended sludge 7-2.

Each of the sewage treatment equipment (2, 3, 4, 6, 7, 8) described above is a closed structure, and the collected waste gas M0 is connected with the waste gas treatment modules (M1, M2).

The multi-level A unit includes four-level anaerobic and anoxic pools (A1, A2, A3, A4), and the two-level O unit includes two-level aerobic pools (O1, O2).

The shape of the bamboo charcoal fiber filler 7-1 is a porous cylindrical shape, the density is close to that of water, the diameter is 15-30 mm, and the height is 6-10 mm.

The chlorine dioxide disinfection tank 2 is composed of a chlorine dioxide reaction unit 2-1 and a dechlorination unit 2-2 in series, and also includes a chlorine dioxide dosing system K.

A comprehensive treatment method for hospital wastewater with zero sludge discharge, the method steps are as follows:

(1) chlorine dioxide disinfection tank 2: after the waste water and feces 1 of the hospital are mixed with the chlorine dioxide medicament added by the chlorine dioxide dosing system K, enter the chlorine dioxide reaction unit 2-1 and the dechlorination unit 2- 2; In the chlorine dioxide reaction unit 2-1, oxidative degradation, sterilization and wastewater disinfection of solid organic matter are carried out to improve the biodegradability of the organic matter, and at the same time, the sludge is reduced; in the dechlorination unit 2-2, the The residual chlorine is exhausted to prevent the microbial activity and growth and metabolism of the subsequent three-grid septic tank 3 from being inhibited; the treated waste water enters the next-level three-grid septic tank 3;

(2) Three-grid septic tank 3: Through the three-grid septic treatment, the feces and sludge are decomposed and fermented step by step, and the total amount of solid organic matter is reduced; 4;

(3) Adjustment tank 4 + cutting pump 5: The cutting pump 5 in the adjustment tank 4 will crush and decompose the paper towels, cloth pieces, fibrous objects and other debris in the waste water collected by the adjustment tank, so as to prevent the blockage of the subsequent equipment and improve the To the closed ultraviolet sterilizer 6 for sterilization treatment;

(4) Sealed UV sterilizer 6: The waste water lifted by the cutting pump 5 is disinfected by the sealed UV sterilizer 6, and then enters the multi-stage biochemical tank 7 after the treatment;

(5) Multi-level biochemical tank 7: After mixing the effluent of the closed ultraviolet sterilizer 6 with the backflow sludge (7-3, 7-4 lifted sludge), it enters the multi-level A unit (A1, A2, A3) , A4) Sludge self-respiration oxidation, hydrolysis reduction and sludge denitrification occur to achieve sludge reduction, and the reduced sludge is converted into inorganic sludge; through multi-stage O units (O1, O2) Nitrification and carbon removal of nitrogen in incoming water, multi-stage O units (O1, O2) and fluidized bamboo charcoal fiber filler 7-1 separate carbon removal bacteria and nitrifying bacteria in different treatment O units, and domesticate specific Enhanced microorganisms to realize the enhanced treatment of the multi-stage biochemical tank 7; the separation of mud and water is realized by the precipitation unit C, and the effluent enters the next-level chlorine dioxide disinfection tank 8; the precipitated sludge part is returned to the multi-level A unit A1 as a return sludge , part of it is discharged to the three-grid septic tank 3 as excess sludge 7-5, and sludge reduction treatment is carried out; Sludge denitrification and fermentation and degradation of three-grid septic tank 3 realize zero discharge of system sludge;

(6) chlorine dioxide disinfection tank 8: the multistage biochemical tank enters the chlorine dioxide reaction unit 8-1 and the dechlorination unit 8-2 for sterilization and dechlorination, and the exhaust gas after the treatment reaches the standard and discharges M3;

(7) The waste gas M0 collected by the collected treatment equipment is sterilized, detoxified, and deodorized by the series combination treatment process of the plasma equipment M1 and the activated carbon adsorption equipment M2, so as to achieve the standard discharge of the gas.

With the treatment of the invention, the effluent quality is better than the standard of "Water Pollutant Discharge Standard for Medical Institutions" (GB18466-2016), and has the advantages of not producing excess sludge, grid slag, etc., and no aerosol, sludge, grid slag, Risk of bacterial infection such as exhaust gas.

The above-mentioned embodiments are only to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. On the premise of not departing from the design spirit of the present invention, those of ordinary skill in the art can make various modifications to the technical solutions of the present invention. Variations and improvements should fall within the protection scope determined by the claims of the present invention.

Claims (6)

1. A hospital wastewater comprehensive treatment device with zero sludge discharge is characterized by being formed by sequentially connecting sewage treatment equipment in a chlorine dioxide disinfection tank, a three-grid septic tank, an adjusting tank, a closed ultraviolet disinfector, a multi-stage biochemical tank and a chlorine dioxide disinfection tank in series, and further comprising a waste gas treatment module; a cutting pump is arranged in the regulating tank; the waste gas treatment module is formed by connecting plasma equipment and activated carbon adsorption equipment in series; the multistage biochemical pool is formed by connecting a multistage A unit, a multistage O unit and a precipitation unit in series, part of sludge at a sludge outlet of the precipitation unit flows back to the front section of the multistage A unit through a sludge reflux pump and a sludge reflux pipe, the rest part of sludge is discharged to a water inlet section of the three-grid septic tank as residual sludge, and fluidized bamboo charcoal fiber filler and suspended sludge are arranged in the multistage O unit.

2. The hospital wastewater comprehensive treatment device with zero sludge discharge according to claim 1, characterized in that: each sewage treatment is of a closed structure, and the collected waste gas is connected with a waste gas treatment module.

3. The hospital wastewater comprehensive treatment device with zero sludge discharge according to claim 1, characterized in that: the multi-stage A unit at least comprises 3 stages of anaerobic tanks and anoxic tanks, and the multi-stage O unit at least comprises 2 stages of aerobic tanks.

4. The hospital wastewater comprehensive treatment device with zero sludge discharge according to claim 1, characterized in that: the bamboo charcoal fiber filler is porous and cylindrical, the density of the bamboo charcoal fiber filler is close to that of water, the diameter of the bamboo charcoal fiber filler is 15-30 mm, and the height of the bamboo charcoal fiber filler is 6-10 mm.

5. The hospital wastewater comprehensive treatment device with zero sludge discharge according to claim 1, characterized in that: the chlorine dioxide disinfection tank is composed of a chlorine dioxide reaction unit and a dechlorination unit which are connected in series, and also comprises a chlorine dioxide dosing system.

6. The comprehensive wastewater treatment method for the hospital with zero discharge of sludge by using the comprehensive wastewater treatment device according to claim 1 comprises the following steps:

(1) a chlorine dioxide disinfection tank: waste water and excrement in hospitals are mixed with chlorine dioxide medicament added by a chlorine dioxide medicament adding system and then sequentially enter a chlorine dioxide reaction unit and a dechlorination unit; in the chlorine dioxide reaction unit, oxidation degradation, sterilization and wastewater disinfection treatment of solid organic matters are carried out, so that the biodegradability of the organic matters is improved, and meanwhile, the sludge is reduced; the residual chlorine is consumed in the dechlorination unit, so that the microbial activity and the growth metabolism of a subsequent three-grid septic tank are prevented from being inhibited; the treated wastewater enters a next-stage three-grid septic tank;

(2) three septic tanks: through three-grid manure treatment, manure and sludge are decomposed and fermented step by step, so that the total amount of solid organic matters is reduced; the septic tank enters a next-stage regulating tank after being treated;

(3) adjusting tank + cutting pump: sundries such as paper towels, cloth pieces, fibrous objects and the like in the wastewater collected by the regulating tank are crushed and decomposed by a cutting pump in the regulating tank, so that the problem of blockage of subsequent equipment is prevented, and the wastewater is lifted to a closed ultraviolet sterilizer for sterilization treatment;

(4) closed ultraviolet sterilizer: sterilizing the wastewater lifted by the cutting pump by a closed ultraviolet sterilizer, and feeding the treated wastewater into a multi-stage biochemical pool;

(5) a multi-stage biochemical pool: after the effluent of the closed ultraviolet sterilizer is mixed with the returned sludge, the mixture enters a multistage A unit to perform sludge self-respiration oxidation, hydrolysis reduction and sludge denitrification, so that the reduction of the sludge is realized, and the reduced sludge is converted into inorganic sludge; nitrifying and decarbonizing nitrogen in the incoming water through a multi-stage O unit, separating decarbonizing bacteria and nitrifying bacteria in different treatment O units through the multi-stage O unit and a fluidized bamboo charcoal fiber filler, and domesticating specific enhanced microorganisms to realize the enhanced treatment of a multi-stage biochemical pool; the sludge-water separation is realized through the precipitation unit, and the effluent enters the next-stage chlorine dioxide disinfection tank; the precipitated sludge is used as return sludge to flow back to the multistage A unit, and the part of the return sludge is used as residual sludge to be discharged to a three-grid septic tank for sludge reduction treatment; the zero discharge of the sludge of the system is realized through the self-respiration oxidation and hydrolysis of the sludge, the denitrification of the sludge and the fermentation and degradation of the three-grid septic tank of the multi-stage A unit;

(6) a chlorine dioxide disinfection tank: the multi-stage biochemical tank enters a chlorine dioxide reaction unit and a dechlorination unit for sterilization and dechlorination treatment, and the treated materials are discharged after reaching the standard;

(7) the collected waste gas collected by each treatment device is sterilized, sterilized and deodorized by a treatment process of serially connecting the plasma device and the activated carbon adsorption device, so that the standard emission of the gas is realized.

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