54results about How to "Improve weight reduction effect" patented technology

The invention relates to an integrated sewage treatment device with high efficiency and low consumption and a treatment method, and belongs to the field of sewage treatment. The integrated sewage treatment device comprises a pretreatment unit, a multi-oxidation-deoxidation environment coupling biological reaction pond unit and a deep treatment unit sequentially connected. The multi-oxidation-deoxidation environment coupling biological reaction pond unit adopts a three-stage anoxia-aerobiotic alternating reaction pond filled with a circular composite glass ball porous microbial carrier. The deep treatment unit comprises a filter cloth dynamic film biological reaction pond and first and second dynamic films. Sewage is treated through the devices sequentially. The device provided by the invention cannot only remove carbon containing organic matters, but also has good nitrogen and phosphorus removal capacity.

The present invention provides a light-weighted backlight capable of ensuring a sufficient light quantity at a low cost. A backlight is arranged below a liquid crystal panel. A light source is arranged in the vertical direction with respect to a screen of the liquid crystal panel so that light from the light source is directed toward the liquid crystal panel by a reflector. Due to such a constitution, the reflector can also function as a back lid of the backlight. Further, the reflector plays a role of directing the light from the light source toward the liquid crystal panel and hence, a light guide plate can be omitted. Due to such a constitution, the present invention can realize the reduction of weight and cost of the backlight or the liquid crystal display panel.

The invention relates to a method for utilizing activated sludge, ozone and a magnetic field to reduce sludge, which belongs to the field of sewage treatment and is characterized by including adding parts of sludge taken from a secondary sedimentation tank into an ozone reactor for ozone breaking, adding broken sludge into a magnetization tank, reinforcing enzymatic activity of microorganism in the magnetization tank through effects of the magnetic field to the microorganism, promoting continuous decomposition of refractory fragments and dead microorganism thallus after ozone breaking, and simultaneously enabling high-activity enzyme produced in the magnetization tank to enter an aeration tank with sludge to stimulate regeneration and activation of microorganism in the aeration tank and remove the dead microorganism thallus. The cast quantity of ozone is 0.01-0.05gO3 / gSS, the strength of the magnetic field in the magnetization tank is 50-600 GS, the aeration mode is that an aeration head is utilized for aeration, the dissolved oxygen density is 2ppm. And the reduction amount of the sludge can reach over 90%.

The invention discloses bacillus amyloliquefaciens A18 with a preservation number of CCTCC NO: M 2018135 and a 16S rDNA sequence as shown in SEQ ID NO: 1. The invention also discloses a preparation method of the bacillus amyloliquefaciens, a liquid microbial inoculum and a solid microbial inoculum thereof, and application of the bacillus amyloliquefaciens in treating kitchen wastes. The bacillus amyloliquefaciens provided by the invention can rapidly degrade starch and protein with high contents in kitchen wastes and inhibit odor generation, can be used for rapid treatment of the kitchen wastes, and realizes rapid biological reduction and stabilization of the kitchen wastes.

A baffled oligochaeta worm mud decrement reactor is a container with rectangular opening. A side wall of rectangular container is lower other three side walls, a container(2) is connected with the top of external wall opposed to low side wall and a side wall is also the wall of rectangular wall. The container(2) is mud pretreatment area, a container(2) is connected with the top of external wall, the other three side walls are higher the low side wall and connected to high side wall of rectangular container parallel, a back plate(8) is installed at one side of low side wall of rectangular-opening container, area between back plate(8) and rectangular container is solid-liquid separating settling area(13), area between back plate(8) and high side wall of rectangular container is oligochaeta worm growth area.

The invention discloses an excess sludge reduction bioreactor with variable aeration and a worm attachment oblique plate, which relates to a bioreactor for excess sludge reduction. The bioreactor solves the problems that that the conventional excess sludge reduction device has low oxygen utilization rate, poor aeration adjustment, easy worm drop, low growth density of worm colony, difficult discharge of inert substances and the like. An automatic gas flow adjustor which is well arranged can automatically adjust the air flow entering a plurality of variable micropore aeration pipes according to the dissolved oxygen concentration of sludge mixed solution in a container, thereby realizing variable aeration for the sludge mixed solution in the container; the dissolved oxygen concentration of the sludge mixed solution can be kept at the maximum dissolved oxygen concentration of the worm sludge reduction through the variable aeration; and a plurality of variable aperture vent holes are uniformly distributed on the variable micropore aeration pipes, and the variable range of the diameters of the vent holes is 0.2 to 0.8 millimeter. The excess sludge reduction bioreactor integrates the worm attachment oblique plate and the variable aeration so as to greatly improve the sludge reduction effect, and the sludge reduction reaches over 90 percent.

The invention discloses bacillus stearothermophilus A21, which has the preservation number being CCTCC NO: M2018137, and the 16S rDNA sequence is shown as SEQ ID NO: 1. The invention also discloses apreparation method of bacillus stearothermophilus, a liquid microbial inoculum, a solid microbial inoculum and application thereof to kitchen waste treatment. Starch and protein with high content in the kitchen waste can be fast degraded; the generation of odor is inhibited; the fast treatment on the kitchen waste can be realized; the fast biological reduction and stabilization on the kitchen waste can be realized.

The invention relates to a process for realizing the decrement of active sludge and the removal of endocrine disrupting chemicals from sludge synergistically in a municipal sewage treatment plant, and belongs to the technical field of environmental protection and waste water treatment. The active sludge is oxidized under the combined action of ozone and H2O2 to be decomposed, and organic a large number of micropollutants (such as the endocrine disrupting chemicals) adsorbed in the sludge are removed simultaneously, so that the concentration of the micropollutants in the active sludge is reduced effectively, wherein for the addition dosage of the ozone, more than or equal to 30 milligrams of ozone is added into each gram of dried sludge, the H2O2 can be added in batch or continuously, and a molar dosage ratio of the ozone to the H2O2 is 1:1.5. In the process, a simple system structure is simple, continuous automatic running can be realized, and large-scale industrial application is easy realized.

The invention provides a biological sludge zero-discharge sewage treatment plant and method embedded with an activated sludge / inorganic sand separator. The plant comprises an OSA sludge reduction main body composed of an aeration tank, a secondary sedimentation tank and an anaerobic uncoupling tank, wherein an activated sludge / inorganic sand separator is embedded in a return sludge pipeline; the bottom of the anaerobic uncoupling tank is connected with a feed port of the biological sludge / inorganic sand separator through a return sludge pipe; an overflow sludge discharge port of the biological sludge / inorganic sand separator is connected with an inlet end of the aeration tank through a return sludge pipe; and an underflow opening of the biological sludge / inorganic sand separator discharges surplus sludge through a sludge pipe. The plant and method can enhance the sludge reduction effect, and the discharged surplus sludge uses the inorganic sand instead of the activated sludge, thereby effectively implementing biological sludge zero discharge of the sewage treatment system, avoiding the secondary pollution of the activated sludge and lowering the sewage / sludge treatment cost.

The invention discloses a phagocytosing type bacterium. The phagocytosing type bacterium is identified to be a bdellovibrio organism, called bdellovibrio for short and classified and named as Bdellovibrio sp., the strain is preserved in the China General Microbiological Culture Collection Center on May 12th, 2016, and the preservation serial number is CGMCC No.11671. The invention further discloses application of the phagocytosing type bacterium in reducing sludge, and further discloses a bacterium extract. The strain is obtained through screening in sludge of a secondary sedimentation tank of a municipal wastewater treatment plant and meets the biosafety regulations; the strain serves as the phagocytosing type bacterium to be applied in sludge cell disruption dewatering, and the sludge dewatering and reducing performance is greatly improved by phagocytosing suspension bacteria and splitting sludge flocs, so that the operation cost of the wastewater treatment plant is reduced, both ecological safety and sanitary safety are considered, and the ecological civilization construction of the environment is promoted.

This water treatment system comprises: a biotreatment step in which an organic waste liquid is treated by microbial action; an ozone gas production step in which an ozone gas is evolved; a sludge transfer step in which some of a microorganism-mixed liquid in the biotreatment step is withdrawn and transferred; an ozone treatment step in which ozone is brought into contact with the transferred portion of the microorganism-mixed liquid; and a treated-liquid return step in which the treated liquid that has undergone the ozone treatment is returned from the ozone treatment step to the biotreatmentstep. The microorganisms which have agglomerated and remain undecomposed after the ozone treatment are separated and concentrated, and the undecomposed microorganism agglomerates having been separatedand concentrated are selectively subjected to the ozone treatment.

The invention discloses an anaerobic digestion sludge dewatering method. By adopting the anaerobic digestion sludge dewatering method, secondary utilization can be performed on sludge, the sludge is prepared into a sludge activated carbon material firstly, sludge activated carbon and a biological flocculant are adopted for combined conditioning, and deep dewatering of the sludge or anaerobic digestion sludge is realized; by taking the sludge activated carbon as a skeleton structure substance, the floc structure strength of the sludge is strengthened through the hydrophobic interaction, viscousmacromolecular organic matters including humic acid and proteins and the like in a liquid phase of the anaerobic digestion sludge are removed synchronously, the filter performance of the sludge is improved, an organic load of subsequent reflux biochemical treatment is lowered; and then by further utilizing the biological flocculant for coagulation, sludge-water separation is promoted, and efficient deep dewatering of the anaerobic digestion sludge is realized. The dewatering method provided by the invention is an environment-friendly conditioning method and can improve the filtering and dewatering efficacy of the anaerobic digestion sludge specially aiming to the characteristics of small particles, high concentration of a dissolved microbial metabolite, poor filter performance and the like of the anaerobic digestion sludge.

The invention discloses a sludge MFC-anaerobic digestion coupling system and a sludge MFC-anaerobic digestion coupling method. The system comprises a closed anaerobic anode chamber and an aerated cathode chamber, which are connected through a communicating pipeline; a proton exchange membrane is arranged in the communicating pipeline, a carbon felt anode in the anode chamber is connected with a carbon felt cathode in the cathode chamber through an alligator clip wire, an outer resistor is arranged between the anode and the cathode, and a circular hole is formed in the anode cover surface and connected with a gas collecting bag and used for collecting methane gas generated by anode anaerobic sludge fermentation. The invention further provides a method for strengthening the performance of the sludge MFC-anaerobic digestion coupling system, wherein waste iron scraps are added into anode anaerobic sludge of the sludge MFC-anaerobic digestion coupling system to obtain iron-containing sludge, and the iron-containing sludge serves as an anode substrate to domesticate electrogenesis bacteria and anaerobic digestion bacteria in the anode anaerobic sludge.

The invention discloses a method for strengthening sludge reduction of an aerobic-sedimentation-anoxic process. In the method, the aeration control of an anoxic pond is increased at the anoxic pond of the conventional OSA process, and aeration parameters such as bubbles, time, gas-liquid ratio, oxidation-reduction potential and the like are controlled, so that the sludge reduction effect of the conventional OSA is improved obviously. For the aeration control of the anoxic pond, aeration equipment of an aerobic biological treatment unit of the conventional process is adopted to perform simple pipeline extension, and the sludge reduction effect of the OSA is improved obviously by controlling the parameters without changing the cost of processing sludge. The aeration control technology can realize automated operation without personnel. The aeration control technology has the advantages of low air consumption, short aeration time, no power consumption, and utilization of air generated by the conventional aeration equipment, and thus the operating cost is close to zero.

The invention discloses a terylene deweighting dyeing assistant, and a preparation method and a use thereof. A raw material formula of the terylene deweighting dyeing assistant comprises, by mass, 10-15% of ethylene glycol monobutyl ether, 10-15% of 1,4-butanolide, 10-20% of fatty alcohol polyoxyethylene ether, 10-20% of secondary alkane sulphonate, and the balance water, wherein the molecular formula of the fatty alcohol polyoxyethylene ether is RO-(CH2CH2O)n-H, n is 7-9 or 15-20, and R is a C12-18 alkyl group; and the molecular formula of the secondary alkane sulphonate is R'SO3Na, and R' is a C10-13 alkyl group. The terylene deweighting dyeing assistant guarantees the terylene dyeing effect and the silk like effect and adopts a one-bath technology; and compared with traditional technologies, the technology has the advantages of saving of a lot of time, energy and substances, and great reduction of the pollutant emission.

The present invention relates to sewage treating biological apparatus, and is especially one kind of vertically flowing composite biological sewage reducing reactor and its operation process. The vertically flowing composite biological sewage reducing reactor is separated with partition boards into three parts, including free protozoan / metazoan growth area, attached protozoan / metazoan growth arean and solid-liquid separating area. The vertically flowing composite biological sewage reducing reactor provides different protozoan / metazoan with proper habitat for stable growth, and thus has effectively raised sewage reducing effect. The present invention may be used in the reducing treatment of residual sewage from biological sewage treating system and in the treatment of reflux sewage in conventional active sewage treating system.

The invention belongs to the technical field of sewage treatment, and discloses a method for reinforcing anoxic-aerobic-precipitated-anaerobic technological sludge decrement. According to the method, sewage is introduced into an anoxic pond to provide a carbon source for a denitrification process, and flows to an aeration pond to be subjected to aerobic treatment and a nitrification process, a sludge-water mixture at the tail end of the aeration pond is delivered to the anoxic pond to achieve denitrification, and the sewage in the aeration pond is introduced into a precipitation pond to conduct natural precipitation to achieve sludge-water separation; the precipitated sludge in the precipitation pond is pumped to an anaerobic pond, a stirring device and a filler device are installed in the anaerobic pond, 20%-30% by volume amount of filler is added in the filler device to increase the sludge-attach specific surface area, and by controlling the temperature and stirring speed of the anaerobic pond, the 80% sludge decrement effect can be achieved, so that the anoxic-aerobic-precipitated-anaerobic technological sludge decrement effect is remarkably improved. Meanwhile, the outflow mode of the anaerobic pond is improved, an outflow tube is arranged at the pond wall, the outflow is gravity overflow, the energy consumption is saved, and the comprehensive utilization rate is effectively increased.

The invention provides a device for achieving thermocatalytic efficient reduction and reclamation of organic wastes. An organic waste feeding system is connected to a proportioning kettle material inlet, the proportioning kettle material outlet is connected to a pre-reaction kettle and the material inlet of a primary reaction kettle, the material outlet of the pre-reaction kettle is connected to the material inlet of the primary reaction kettle, the material outlet of the primary reaction kettle is connected to the material inlet of a cooling kettle, and the material outlet of the cooling kettle is connected to a solid-liquid separation system; a part liquid outlet of the solid-liquid separation system is connected to a water treatment system, and the liquid outlet of the water treatment system is separately connected to the proportioning kettle, the pre-reaction kettle and the material inlet of the primary reaction kettle; a jacket of the primary reaction kettle is connected to a heat source system; the steam outlet of the primary reaction kettle is connected to the proportioning kettle and the steam inlet of the pre-reaction kettle, and the steam outlet of the cooling kettle is connected to the steam outlet of the proportioning kettle; and the cooling water inlet and outlet of the proportioning kettle are connected to the cooling water outlet and inlet of the cooling kettle. The reduction effect of the organic waste is good, a catalyst can be recycled, and the solid product after reaction can be recycled.

The invention discloses organic hazardous waste thermocatalytic efficient reduction double-kettle process equipment. The equipment is characterized by comprising a batching kettle with a material inlet connected to an organic waste feeding system, the batching kettle is connected to a first main reaction kettle and a second main reaction kettle respectively, the first main reaction kettle and thesecond main reaction kettle are connected to a cooling kettle, and the cooling kettle is connected to a solid-liquid separation system; the first main reaction kettle and the second main reaction kettle are connected to a steam system; the first main reaction kettle is connected to the batching kettle and the second main reaction kettle; the second main reaction kettle is connected to the batchingkettle and the first main reaction kettle; the cooling kettle is connected to the batching kettle, and the batching kettle is connected to a VOCs treatment system; and a cooling water pipeline of thecooling kettle and the batching kettle are communicated to form a cooling water circulation system. Hot steam is recycled through flash evaporation between the double-kettle equipment, energy is greatly saved, a catalyst is recycled after water treatment, and use of the catalyst is reduced; and a carbon crystallization product obtained by the reaction can be recycled, so that secondary pollutionto the environment is avoided.

The invention discloses a method for realizing reduction of recessive growth of sludge through reduction of microbial iron which is subjected to coupled oxidation by using Fenton. The method comprisesthe steps of: preforming a biochemical reaction of activated sludge on sewage, conducting static setting on the obtained sludge-water mixed liquid in a secondary settling tank, and performing refluxof part of the sludge to a biochemical reaction system, discharging the remaining sludge into a sludge concentration tank for concentration treatment, performing conditioning dehydration on part of sludge in the concentration tank, performing external transporting treatment, and discharging a part of the dehydrated sludge into a microbial iron reduction tank so as to realize hydrolysis of the sludge and reduction of Fe<3+>; performing treatment on the sludge in the microbial iron reduction tank, discharging the reduced sludge into a sludge Fenton reaction tank, and starting a Fenton reaction so as to perform breakage treatment on the sludge; and transferring the sludge cell-broken liquid to a regulating tank so as to realize further reduction of endogenous consumption of the sludge, and returning the sludge cell-broken liquid in the regulating tank to the biochemical reaction tank. Through the method, reduction of the sludge inside the sewage treatment system and reinforcement of a biochemical treatment effect of wastewater are realized, the method has simple operation and low cost, and a feasible method is provided for efficient reduction of the remaining sludge and improvement ofthe biochemical treatment effect of the wastewater.

The invention discloses an anaerobic digestion sludge dewatering method. By a struvite crystallization method, sludge is adjusted to be weakly alkaline, then magnesium salt is added so as to form insoluble magnesium ammonium phosphate (commonly known as struvite) crystals. On such basis, an organic flocculant is added, and colloidal particles are destabilized through electrical neutralization, collide with one another and re-aggregate into large particles, so that the floc particle size can be effectively increased, and thus the sludge dewatering performance is enhanced. The biodegradable organic flocculant is used, so that the anaerobic digestion sludge dewatering method is an environment-friendly green sludge dewatering treatment scheme; moisture content of sludge can be reduced to 50% or below, the reduction effect of pressure dewatering equipment can be greatly improved, and subsequent disposal and utilization are facilitated; in addition, based on an idea of turning wastes into treasures and recycling, the nitrogen and phosphorus removal rate is high, and the precipitated product struvite in the sludge is a slow-release fertilizer which can form soil-crop-animal-human-soil phosphorus cycle.

The invention relates to a step-feed biological nitrogen removal and sludge decrement coupling bioreactor and a process thereof, belonging to the field of sewage treatment and aiming to overcome the technical defect that the sludge output is large, and the total nitrogen removal effect of sewage with a low carbon-nitrogen ratio is poor. The bioreactor sequentially comprises a biological reaction area and a secondary clarifier, wherein a biological reaction area sequentially comprises an aerobic area, an anoxic area, an aerobic area, an anoxic area, an aerobic area, an anoxic area, an aerobic area and an anoxic area, and the volume ratio of each aerobic area to each anoxic area is (1.5:1)-(2:1); a porous carrier is arranged inside the biological reaction area; the carrier filling volume ratio of the aerobic areas is 40-60 percent, and the carrier filling volume ratio of the anoxic area is 90-100 percent; and all the areas are respectively provided with a baffle plate. The bioreactor is divided into three water inlet stages, the secondary clarifier is provided with a water outlet pipe and a sludge discharge pipe, and backflow sludge is conveyed to the aerobic areas O-I through a pump. The TN removal ratio of the bioreactor is 75.3 percent, the COD removal ratio is 94.3 percent, and the sludge productivity is 0.102kgMLSS / kgCOD.

The invention discloses a sludge reduction system and a sewage treatment method, belonging to the technical field of sewage treatment. The sludge reduction system comprises a biological treatment tank, a secondary sedimentation tank and a sludge reduction device, wherein the feeding end of the sludge reduction device is connected with the sludge end of the secondary sedimentation tank, and the discharging end of the sludge reduction device is connected with the biological treatment tank; and the sludge reduction device comprises a sludge reduction reactor, an acetic acid input device for adding acetic acid into the sludge reduction reactor and a stirring device arranged in the sludge reduction reactor. On the basis of a traditional sewage treatment process, a sludge reduction device is externally connected to a return sludge end, and the return sludge is treated by using acetic acid, so extracellular polymeric substances on the surface of the sludge are disintegrated, a part of cells undergo cytolysis, macromolecular organic substances are decomposed into micromolecular substances, and the purpose of sludge reduction is achieved. According to the sewage treatment method, the yield of sludge is reduced from the source, a good condition is provided for subsequent sludge treatment, and the operation cost of a sewage treatment plant is reduced.

The invention relates to cleaning integration sewage treatment system comprises cubic cycle oxidation channel sewage treatment reaction zone to remove organic pollutant, ammonia nitrogen, and suspended solid, vertical flow composite biological sludge decrement reaction zone to decrease sludge from super zone by protozoan or metazoan, and biological deodorization reaction zone to remove hydrophilic and hydrophobic odor material from super zone by fungi and bacteria, with volume proportion as 100-200: 2-10: 1. This invention has well treatment effect to a plurality of sewage, and has floor area decreases 50% compared with traditional method.

The invention provides an efficient sludge reduction and synchronous carbon and nitrogen removal system. The system comprises: a water inlet adjusting device; a sludge fermentation coupling short-cut denitrification / anaerobic ammonia oxidation bioreactor; a gas-liquid mixing device; a sequencing batch nitrification reactor; an anaerobic aeration water tank; and an up-flow anaerobic sludge blanket reactor communicated with the water outlet of the anaerobic aeration water tank. According to the system disclosed by the invention, the aerobic nitrification section is arranged at the rear section of the coupling system for the first time, so that the removal effect of organic matters and nitrogen is further enhanced; and the generated nitrate nitrogen is utilized to regulate and control the environmental conditions in the sludge fermentation coupling short-cut denitrification / anaerobic ammonia oxidation bioreactor and the up-flow anaerobic sludge blanket reactor so as to respectively improve the sludge reduction effect and the anaerobic degradation of refractory organic matters, thereby realizing the efficient reduction of residual sludge and the deep reduction of carbon and nitrogen.

The invention relates to a residual sludge reduction system and method for a wastewater biochemical treatment system. The system comprises a secondary sedimentation tank (2) connected with a sludge discharge port of a biochemical treatment unit (1), and a pretreatment tank (3), a hydrodynamic cavitation device (4) and a pH regulating tank (5) which are sequentially connected with the secondary sedimentation tank (2). An outlet of the pH regulating tank (5) is connected with the biochemical treatment unit (1) to form a loop, and the hydrodynamic cavitation device (4) and the pretreatment tank (3) form a circulation loop. The method comprises the following steps of introducing the sludge into the pretreatment tank (3), adding acid and alkali for pretreatment, introducing the treated sludge into the venturi tube hydrodynamic cavitation device (4), and sucking the hydrogen peroxide as an oxidant for synergistic cell dissolution during the cavitation process by utilizing the self-suction effect of a venturi tube. Compared with the prior art, the method and the system are low in energy consumption and better in economical efficiency and do not generate the secondary pollution. The closed-loop coupling is formed with a wastewater treatment system, so that the sludge reduction in the biochemical system can be promoted.

The invention discloses a method for strengthening alkaline fermentation sludge reduction of excess sludge by adding NaCl and belongs to the technical fields of sludge anaerobic fermentation and sludge reduction. The method comprises the following steps: taking excess sludge for an SBR pilot plant test as fermentation device starting sludge, wherein after the sludge is elutriated with running water, the sludge indexes are that the sludge concentration MLSS is 9,000-10,000mg / L and the pH value is 7-8; adding the elutriated excess sludge to a miniature SBR device with the capacity of less than 3L; preparing 2-4mol / L NaOH solution in an alkali reagent box; and stirring in the miniature SBR device for 30-60 minutes, and then starting an NaOH dosing pump to pump the NaOH solution into the miniature SBR device. Hydrolysis of the excessive sludge can be promoted under the alkaline condition, the activity of methanogens can be restrained; in addition, the structure of EPS can be destroyed by high-concentration Na<+> under the alkaline condition, the amount of release of protein and polysaccharide is increased, and the autolysis speed of the excess sludge is quickened; therefore, the purpose of excess sludge reduction is achieved.

The invention discloses a microorganism bacterium agent for sludge reduction onsite as well as a preparation method and application of the microorganism bacterium agent. The microorganism bacterium agent is prepared from bacillus amyloliquefaciens CGMCC No 1.769 and saccharomyces cerevisiae CGMCC No 2.3853. Fermentation liquor of the bacillus amyloliquefaciens and fermentation liquor of the saccharomyces cerevisiaeare respectively frozen and dried into powder; the two types of powder are mixed to form the microorganism bacterium agent. The microorganism preparation disclosed by the invention is used for domestic sludge reduction onsite and the microorganism bacterium agent is added into an aerobic tank of a municipal sewage treatment plant. The addition quantity of the microorganism bacterium agent is 0.01 permillage to 0.1 permillage of the quantity of processed water in the aerobic tank. According to the invention, a biological cell lysis method is utilized to degrade macro molecular hard-degraded substances in sludge and addition of the microorganism bacterium agent can obviously reduce yield of the sludge. Compared with the prior art, the microorganism bacterium agent has the characteristics of high efficiency, low cost and high simplicity for operation and is suitable for sludge reduction onsite of all municipal sewage treatment plants.