875 results about "Oxidation pond" patented technology

The invention relates to a method and a device for processing pharmaceutical wastewater by pulse electrocoagulation-MBR. The main process of the method is a pulse electrocoagulation-chemical oxidation-MBR process. The device sequentially comprises a regulating reservoir, an electrocoagulation reactor, a chemical oxidation pond, an anoxic pond and a membrane bioreactor, wherein the electrocoagulation reactor adopts a pulse power supply for power supply, overcomes the problem that a polar plate is susceptible to passivation, has the characteristics of low energy consumption and high process efficiency, and can remove a major part of pollutants in the wastewater; the chemical oxidation pond plays a role in strong oxidative decomposition and converts difficult-to-degrade substances into biodegradable minor molecule substances; and the anoxic pond and the membrane bioreactor form an A/O process, the membrane bioreactor can effectively degrade organic substances, ammonia nitrogen and other pollutants in the wastewater, the processed waster water is filtered by a membrane and the effluent can reach an industrial grade A level. The process has the advantages of impact load resistance, stable effluent quality and low investment cost.

The invention relates to a sewage in-situ purification system using a drainage ditch. The drainage ditch is divided into a treating ditch and a diverting ditch which are parallel to each other along the longitudinal direction; the front ends of the treating ditch and the diverting ditch are provided with diverting grooves; the front end of the treating ditch is provided with a grit chamber, and the tail end is provided with a sedimentation basin; a contact oxidation pond and an artificial wetland pond are arranged between the grit chamber and the sedimentation basin; and the grit chamber, thecontact oxidation pond, the artificial wetland pond and the sedimentation basin are spaced by a transverse partition wall. The invention can effectively carry out in-situ purification treatment to sewage by using ditch space, realize the continuous treatment and the purification to the sewage and enable the ditches to become a landscape harmonious with surrounding environment. The sewage in-situ purification system can carry out hydraulic drop oxygenation to the sewage by sufficiently using height difference variations inside the drainage ditch, reduce the cost of sewage treatment, does not generate secondary pollution and affect the flood discharge of the drainage ditch and can effectively intercept and remove high-concentration pollutants caused by the flush effect of initial rain.

The invention discloses an improved smoke removal purifier, which comprises a purification tower, wherein the purification tower comprises an oxidation pond containing absorption solution and an air bubbling component, and a smoke removal purification section containing at least two groups of absorption solution sprinkling components and at least one group of defoaming components; and particularly, the purification tower also comprises a group of washing sprinkling components for purifying flue gas and at least one group of flue gas washing section of a flue gas defoaming component. The washing section is connected with a washing circulating tank, and washing solution is also used for flushing the defoaming components of the smoke removal purification section. Thus, slurry droplets carried by the flue gas after purification are washed in the flue gas washing section and enter the washing solution, the concentration of the slurry droplets is greatly diluted and reduced, even certain droplets are carried out by the flue gas in the flue gas washing section, obvious white spots and equipment corrosion are hardly generated by the droplets, and the problem of the content increment of sulfate rain and smoke dust is solved.

The invention relates to a two-chambered alga microbial fuel cell and treatment wastewater method of low energy consumption thereof, belonging to the field of wastewater treatment. The invention resolves the problem that the current aerobic biological treatment process has large energy consumption and high cost because of adopting the imposed aeration. An anode chamber of two-chambered alga microbial fuel cell is connected with a cathode chamber thereof through a diaphragm; a vacuum pad is arranged on the position among the diaphragm, the anode chamber and the cathode chamber; the anode chamber is provided with an anode and the cathode chamber is provided with a cathode; the anode and the cathode are connected with an external circuit by a lead wire, wherein the external circuit is positioned outside the two-chambered alga microbial fuel cell. The method comprises the following steps: firstly, a reactor is started; secondly, the wastewater enters into the cathode chamber and the anode chamber, the microorganism degrades to metabolize organics and simultaneously gets electrical energy under the room temperature; cathode alga provides oxygen for the cathode chamber by the photosynthesis. The alga microbial fuel cell can be the main structure of wastewater and aerobic treatment, which can replace the roles of an aeration tank, a biological filter, an aeration oxidation pond and the like in a wastewater treatment factory so as to reduce the energy consumption of the aerobic biological treatment.

The invention provides a honeycomb network pipe bio-carrier suitable for a biological contact oxidation pond for solving problems of low film-forming speed and small film-forming quantity of the traditional bio-carrier and low transfer efficiency of a bio-carrier area. The honeycomb network pipe bio-carrier consists of a honeycomb network pipe bio-filler which is prepared from modified polyethylene, modified polyvinyl chloride or modified polypropylene material; carbon black and polyvinyl alcohol components are added into the carrier; and the honeycomb network pipe bio-filler is a honeycomb filler formed under the thermal physical adhesive effect of a plurality of network pipes, the single network pipe is hollow, the diameter of the network pipe is 8 to 12 centimeters, the single network pipe is cut into small network pipes with the lengths of 60 to 80 centimeters, and the upper parts and the bottom parts of a plurality of small network pipes of 60 to 80 centimeters are adhered together through thermoplastic to form the honeycomb network pipe bio-filler. The addition of the carbon black and polyvinyl alcohol components improves the hydrophilic property of the bio-carrier and the adhesive ability of microbe, and remarkably improves the film-forming speed and film-forming quantity.

The invention relates to a system for recycling and treating coking wastewater. The system comprises an electrocoagulation floatation pond, an electrocoagulation floatation dregs-scraping machine, an electrocatalysis oxidation pond, a membrane biological reaction pond, a membrane bioreactor water-discharging pump, a multi-medium filter, a carbon filter, a security filter, a reverse osmosis high pressure pump, a reverse osmosis device, a reverse osmosis water-producing pond, a reverse osmosis water-producing delivery pump, a filter reverse washing pond, a filter reverse washing pump, a reverse osmosis washing pond, a reverse osmosis washing pump, a reverse osmosis concentrated water pond, a reverse osmosis concentrated water delivery pump and a pipeline mixer, wherein the electrocoagulation floatation pond is internally provided with an electrocoagulation electrode and an electric floatation electrode; the electrocatalysis oxidation pond is internally provided with an electrocatalysis oxidation electrode; and the membrane biological reaction pond is internally provided with a membrane bioreactor. The treatment system has stable treatment effect, low production and operation cost, and convenient and simple operation, can treat and utilize the water drained from a biochemical precipitation pond, avoid the physical and chemical treatment section after the normal biochemical treatment, avoid using a large amount of medicament, reduce the sludge treatment amount of the system and lower the operation cost of wastewater treatment.

The invention relates to a method for treating high-concentration organic industrial waste water and equipment thereof. In the invention, processes of micro-electrolytic reaction, catalytic oxidation reaction, electro-catalytic oxidation reaction and photo-catalytic oxidation reaction are creatively combined organically for pretreatment, and then, biochemical treatment processes of hydrolytic acidification and contact oxidation are matched to ensure that the treated waste water reaches the standard. The equipment of the invention comprises a complex electric bed, a photo-catalytic oxidation device, a hydrolytic acidification pond and a contact oxidation pond which are connected sequentially, wherein a waste water inlet is arranged on the complex electric bed, and a purified water outlet is arranged on the contact oxidation pond. The combined equipment can realize the purpose of converting and decomposing organic matters which can not be degraded easily, high-molecular organic matters and toxic organic matters into organic matters which can be degraded easily, low-molecular organic matters and non-toxic organic matters, thereby achieving the discharge standard finally. In addition, the equipment of the invention can realize integration and control automation, has high degree of automation and low operating cost, and is very suitable for industrial popularization and application.

The invention relates to a municipal life wastewater treatment system with high efficiency and low energy consumption. The system comprises a reinforcement pretreatment part, a jet-type aeration biological filter part and a composite-type biological contact oxidation pond part. Multistage oxygen deficiency treatment, anaerobic treatment, aerobic treatment, sedimentation and filtration are adopted, reinforcement pretreatment and partial oxygen deficiency-anaerobic treatment are carried out on the wastewater, most organic pollutant can be removed and degraded, and the biodegradability of the wastewater is improved, partial aerobic treatment, oxygen deficiency treatment, anaerobic treatment, sedimentation and filtration treatment are carried out on the jet-type aeration biological filter pond, a great amount of organic pollutant, ammonia nitrogen and phosphate is removed, partial aerobic treatment, oxygen deficiency treatment, anaerobic treatment, sedimentation and filtration treatment are carried out on the composite-type biological contact oxidation pond, partial organic pollutant remained in the wastewater is removed and degraded, so that the pollutant removing rate of the domestic wastewater is improved. The system is small in occupied area, low in investment, low in operation cost and convenient in maintenance and management, and reaches the standard A of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002).

The invention discloses a caffeine production wastewater treatment method, and relates to a wastewater treatment method. The method solves the problem that the content of organic and inorganic substances in effluent produced by the traditional caffeine production wastewater treatment method is high and cannot reach the second-level discharge standards of GB8978-96 'Integrated Wastewater Discharge Standard', and comprises the following steps: 1, adjusting pH of wastewater in a regulating pond; 2, pre-treating the wastewater in an iron-carbon-Fenton oxidation pond; 3, treating the wastewater in a floatation tank; 4, performing anaerobic hydrolysis-acidification treatment on the wastewater in a UASB reactor; 5, treating the wastewater in a biological contact oxidation pond; 6, treating the wastewater in a hydrolyzing multifunctional pond; 7, treating the wastewater in a high-efficiency activated sludge pond; and 8, treating the wastewater in a secondary sedimentation tank to obtain drain water. The whole removing rate of the method is 90 to 98 percent (mass); the pH of the drain water is 7 to 8; COD is 100 to 200 mg/L; ammonia nitrogen is 5 to 25 mg/L; and the color removal rate reaches the national second-level discharge standards.

The invention relates to an organic sewage constructed wetland processing and high-yield non-food energy plant cultivating technology, which is characterized in that the organic sewage is sent into a methane tank, an oxidation pond and a constructed wetland orderly to achieve the purpose of sewage purification, and simultaneously, the non-food energy plant is cultivated. The invention has the advantages that a buried type ABR system can be ensured to be in an intermediate-temperature fermentation state, the organic matter is digested quickly, and methane is produced with high yield; the methane is used for intensifying light, heating, increasing carbon dioxide fertilizer and enhancing photosynthesis for the system to produce the non-food energy plant with high yield; under the previous condition, plant seeds and energy plants on the oxidation pond (the stabilization pond) and the constructed wetland can grow quickly so as to obtain high yield and produce high-quality protein feed, and the normal growth and absorption of eutrophic substances in the sewage in winter can be ensured; simultaneously, purified reclaimed water is fully utilized; and the plants inside and outside the system grow quickly, a large amount of carbon dioxide is absorbed and utilized, and zero emission of sewage and methane is realized.

The invention relates to the technical field of water treatment and discloses an emulsion wastewater treatment system. The emulsion wastewater treatment system comprises a water collection well, an adjusting tank, an emulsion breaking air floating tank, a catalytic oxidation tank, a coagulation precipitation tank, an A/A/O biochemical tank and a secondary sedimentation tank, which are connected through a pipeline in sequence. The invention further discloses an emulsion wastewater treatment process, comprising the following steps: collecting emulsion wastewater into the water collection well; enabling output water of the water collection well to enter the adjusting tank; enabling output water of the adjusting tank to enter the emulsion breaking air floating tank; enabling output water of the emulsion breaking air floating tank to enter the catalytic oxidation tank; enabling output water of the catalytic oxidation tank to enter the coagulation precipitation tank; enabling output water of the coagulation precipitation tank to enter the A/A/O biochemical tank and enabling output water of the A/A/O biochemical tank to enter the secondary sedimentation tank. By combining a physical-chemical method and a biochemical method, the emulsion wastewater treatment system and process have the advantages of high treatment efficiency, simple process flow, low operation cost and the like.

The invention discloses a method for treating coking wastewater by adopting a Fenton oxidation tank, a neutralization tank and a flocculation and sedimentation tank for pretreatment, adopting an anoxic tank and an aerobic tank for biochemical treatment and adopting modified coke powder adsorption for deep treatment. At a pretreatment stage, a metallurgical acid pickling waste liquid is added intoa Fenton oxidation reaction tank, so that waste acid resources and Fe<2+> in the acid pickling waste liquid are sufficiently utilized, and the acid pickling waste liquid from steel mills is recycled to the maximum extent; desulfurized ash is added into the neutralization tank, and part of additionally added alkaline liquid is replaced by sufficiently utilizing the alkalinity of the desulfurized ash, so that the operation cost of a process is reduced; and dry quenching coke powder for deep treatment is a byproduct produced in a coking process, and when the dry quenching coke powder is applied to the field of wastewater treatment, not only is the wastewater treatment cost reduced, the quality of the final effluent improved, but also the aim of treating wastes by utilizing wastes is achieved.

The invention discloses a high-concentration emulsion treatment method and a treatment system. The system comprises a waste emulsion storage tank, an acidification reaction tank, an oil separation tank, a Fenton reaction tank, a press filter, an evaporating pot and a biochemical device sequentially; the biochemical device comprises a filtrate collection tank, an anaerobic tank, a facultative anaerobic tank, an aerobic tank, a biological aerated filter, an MBR (Membrane Bioreactor) membrane tank, a reverse osmosis tank, a chemical oxidation pond and a recycled water tank which are sequentiallyconnected; the acidification reaction tank is connected with a dosing tank which is used for adding a demulsifier, and the Fenton reaction tank is connected with a dosing tank II for adding a Fenton reagent, a dosing tank III for adding a demulsifier and a dosing tank IV for adding liquid alkali/lime hydrate. The treatment method comprises the steps of collecting treatment, acidification, primarycoagulative precipitation, secondary coagulative precipitation, evaporation treatment, biochemical treatment and second-stage biochemical treatment. The system and the method have the effects of highdemulsification capability, applicability to the treatment of a variety of emulsions, high recovery and reutilization rate and high purification treatment capacity.

The invention discloses dual-circulation single-tower desulfurization systems and a process thereof. A liquid collecting disc arranged in a desulfurization tower divides a desulfurization area into an upper circulation desulfurization area and a lower circulation desulfurization area. The lower circulation desulfurization area, a lower circulation neutralization oxidation pond and a lower circulation pump altogether form a lower circulation desulfurization system. The upper circulation desulfurization area, an upper circulation neutralization oxidation pond and an upper circulation pump altogether form an upper circulation desulfurization system. The dual-circulation desulfurization systems which are relatively independent are formed in the desulfurization tower, and desulfurization of flue gas is completed by the two dual-circulation desulfurization systems together. The dual-circulation single-tower desulfurization systems which operate relatively independently are arranged within one desulfurization tower, so that high desulfurization efficiency is guaranteed, and the slurry circulation amount and the system power consumption are reduced, besides, the integral arrangement of the single tower reduces the occupied area and saves investment. The dual-circulation single-tower desulfurization systems are particularly applicable to desulfurization of flue gas produced by burning high sulfur coal, and the desulfurization efficiency can achieve more than 99%.

The invention provides a method for treating dyeing wastewater and a dedicated device. The method comprises the following steps of treatment under the automatic control of a central control unit: A, discharging the dyeing wastewater which is uniform quality and uniform quantity into a flocculation precipitating tank, and adding coagulating agent and flocculating agent to the flocculation precipitating tank so as to precipitate the suspended substance and part of organic substances; B, discharging the clear liquid of the wastewater in step A into a hydrolytic acidification tank, and decomposing the macromolecular organic substances in the wastewater into micro molecular substances under the action of facultative anaerobe; C, discharging the wastewater in step B into a contact oxidation tank, feeding air into the contact oxidation tank and decomposing the organic substances in the wastewater under the action of aerobe; D, discharging the wastewater in step C into a membrane bioreactor, and entrapping and decomposing the stale biological membrane slag and the residual organic substances by the membrane bioreactor; and E, sucking the clear water in step D into a clean water tank and discharging the sludge in the membrane bioreactor into the hydrolytic acidification tank or the contact oxidation tank respectively through a return sludge pump by the concentration of the sludge. The invention has the advantages that the treatment cost is low and the treated water is recyclable, thereby helping enterprises to achieve the purposes of energy conservation and emission reduction.

The invention relates to a purifying art for a water system in a landscape park. Surface water is delivered through a sand basin (3) and then to an oxidation pond (4) with filler, the water then flows into an artificial swamp (1), and the water which flows out of the artificial swamp is regulated and deposited by a stabilizing pond (5), finally the water flows into the water pond of the landscape park; the water is pumped into a stream swamp (2) of the park by a pumping device (6), the water in the stream swamp is pumped to a mudflat swamp (7), thus the water in the mudflat swamp can automatically flow back to the water pond of the landscape park; the domestic sewage in the landscape park is treated in the biomass energy transforming center and then is delivered into the oxidation pond (4) with filler. The biomass energy transformation includes the procedures of adjusting, oil separation, anaerobic reaction, aerobic reaction and depositing; the biomass energy transformation is mixed with the common domestic sewage after two grades of anaerobic reactions. The invention can assure the water quality in the landscape park to be equal to or better than the water quality for entertainment in the landscape park; the treatment procedure can protect environment, thereby providing satisfactory water source for an artificial lake as well as effectively treating the waste; and the invention can provide the needed energy for the whole treatment system and have great social and economic benefits.

The invention discloses a method for treating high-concentrated non-degradable wastewater by using wastewater containing hydrogen peroxide, which comprises: (1) uniformly mixing the wastewater containing the hydrogen peroxide and the high-concentrated non-degradable wastewater in an oxidation pond, adding acid to adjust the pH value of the wastewater, and adding a catalyst to perform Fenton oxidation reaction; (2) adding an alkali in wastewater obtained after the completion of the oxidation to adjust the pH value of the wastewater, and performing flocculating setting in a settling basin; and (3) treating supernatant and settled sludge respectively after the completion of the settlement. The method treats the high-concentrated non-degradable wastewater by using the wastewater containing thehydrogen peroxide, thereby saving the treatment cost of both the wastewater containing the hydrogen peroxide and the high-concentrated non-degradable wastewater. The method has obvious social benefits and environment protection benefits while creating excellent economic social benefits.

The invention discloses a treatment method for industrial park wastewater. The treatment method sequentially comprises the following steps: pretreatment on the wastewater, hydrolytic acidification variable biochemical treatment, flocculation and sedimentation, advanced oxidation, secondary precipitation, biological aerated filter, oxidation pond and the like, wherein a hydrolytic acidification variable biochemical treatment system controls anoxic and aerobic environments through water quality change within a running cycle; the anti-shock water loading capability of the system is increased; nutrient substances such as nitrogen and phosphorus are removed when carbon-source organic matters are removed; ultraviolet light and ozone are combined by a high-level oxidation system; the pollution removal rate of a reaction system is greatly improved; and the residual SS, COD, BOD, nitrate, phosphorus and the like are removed by the biological aerated filter. Compared with the prior art, the pollutant removal capacity is obviously improved; and the effluent can reach the maximum allowable emission concentration level standard A (petrochemical industry, seeing table 4 in GB8978-1996) of the second pollutants in the integrated wastewater discharge standard (GB8978-1996).

The invention discloses a wetland process for deep purification of tail water of a sewage plant, which comprises the tail water of the sewage plant, a limestone filter pool, a submerged plant oxidation pond, a vertical-flow wetland, a surface-flow wetland, a composite substrate filter pool, an ecological reoxygenation pond and a receiving water body. The wetland process has the characteristics of efficient and ecological denitrification and dephosphorization, utilizes a water head with the height of about 0.5m to automatically flow, has the hydraulic load of 200mm/d, has no energy consumption and drug consumption, is anti-clogging, and can perpetually and steadily operate with low cost; the removal rate of nitrogen and phosphorus is higher than 95 percent, and the water quality of water output is superior to the GB3838-2002 ground surface class III water standard. The wetland process is suitable for the deep purification of the tail water of small sewage plants in cities and towns, and the treated output water can be recycled in water-deficient areas and can serve as a high-quality water source for the supply of water bodies of landscapes in the cities or residential areas. The process needs larger land area which can be merged into a whole with green areas and wetland parks of the cities. In the sewage plant of Eryuan county, Yunnan province, the process is utilized to build 2.2 hectares of wetland engineering for the deep purification of the tail water, the daily water treatment capacity is 4,000m<3>, the sewage plant has been steadily operated for 5 years, and the annual operation management cost is fifty thousand yuan.

The invention discloses a limestone-gypsum wet flue gas desulfurization device, belongs to a flue gas desulfurization device applicable to a power station boiler, an industrial boiler or a kiln, and aims at solving a problem of an existing flue gas desulfurization device which is low in limestone solubility. The flue gas desulfurization device comprises an induced draft fan, a flue gas heat exchanger, an absorption tower, a slurry circulating pump, an oxidation pond, an oxidation air blower, a limestone slurry tank, a limestone slurry pump, a limestone powder cabin, a gypsum discharging pump, a gypsum cyclone, a belt dehydrator, a filtrate water tank and a filtrate water pump. The wet flue gas desulfurization device disclosed by the invention can activate limestone slurry through high-concentration CO2 flue gas generated from oxygen-enriched combustion, so as to accelerate the limestone slurry dissolution rate, improve the solubility, improve the desulfurization efficiency, reduce the liquid-gas ratio and reduce the water dosage, so as to achieve effects of energy conservation and emission reduction; the wet flue gas desulfurization device is free from secondary pollution, and is excellent in economic and environmental benefits.

The invention discloses an AAO (Anaerobic-Anoxic-Oxic)-biological contact oxidation strengthened denitrification and dephosphorization device and a real-time control method of low C/N sewage treatment. The system is mainly composed of a raw water tank, an AAO reactor, an intermediate sedimentation tank, a biological contact oxidation tank, a settling zone, a discharged water tank, an online control box and a computer. The real-time control method is as follows: a DO sensor online collects concentrations of dissolved oxygen in grid cells of the biological contact oxidation tank, and the computer calculates and outputs the concentrations to control the nitrification process; a NH<4+> sensor, a NO<3-> sensor, a NO<2-> sensor and a TP sensor online collect the concentrations of ammonia nitrogen, nitrate, nitrite and total phosphorus in the discharged water tank, and the computer calculates and outputs according to the signals collected by the sensors to adjust the aeration amount, the reflux ratio of nitrifying liquid and water intake C/N. By adopting the online real-time control equipment, the system operation is optimized, the energy is saved, the consumption is reduced, the carbon source and the aeration amount are saved and the residual sludge is reduced.

The invention discloses a double-groove wet-process flue gas desulfuration device and a double-groove wet-process flue gas desulfuration method operating on the basis of two pH values, which relate to a flue gas desulfuration device and a flue gas desulfuration method. The aim of the invention is to remove SO2 from the flue gas under a high pH value condition by using desulfurating spray slurry and to dissolve limestone and oxidize calcium sulfite under a low pH value condition so as to improve desulfuration efficiency and quality of gypsum and reduce limestone consumption, investment and operation cost. In the invention, a circulating oxidization tank at the bottom of an absorption tower is divided into two parts, an oxidation pond receives desulfurizating slurry flowing out from a desulfurization tower, the oxidation pond operates in a pH range from 4.0 to 5.5, and in the oxidation pond, sulfite ions are oxidized, and byproduct of desulfuration is led out from the oxidation pond; and fresh limestone slurry is added into a circulating pond, the circulating pond operates in a pH range from 6 to 6.5, and slurry is led from the circulating pound into the absorption tower to be sprayed for deselfuration. The device and the method contribute to improving quality of gypsum, desulfuration efficiency, reducing limestone consumption and lowering investment and operation cost, and are suitable for flue gas desulfuration when sulfur coal is burnt or different kinds of fire coal are burnt.

The invention discloses Pseudomonas nitroreducens and application thereof, belonging to the field of environmental microorganism. The Pseudomonas nitroreducens CQ1 of the invention is derived from thesewage of oxidation ponds in the sewage treatment system of Beijing Yanshan Petrochemical Co., Ltd., and obtained by enriching, separating and purifying. The Pseudomonas nitroreducens CQ1 is culturedand collected in the China General Microbiological Culture Collection Center (hereinafter referred to as CGMCC) with the collection number being CGMCC No.3159. The invention further discloses the application of Pseudomonas nitroreducens in the biodegradation of quinoline or derivatives thereof. Quinoline or derivatives thereof with the concentration reaching 700mg/L can be degraded by Pseudomonasnitroreducens of the invention, and the degradability can reach 100% after treating for 72h. Moreover, the Pseudomonas nitroreducens CQ1 of the invention is sensitive to kanamycin sulfate, tetracycline and gentamicin and does not carry plasmids.

The invention relates to a wastewater and sludge treatment technique, which particularly provides a sludge and wastewater free treatment system. The system comprises grilles, an aerated grit chamber, a hydrolysis acidification pond, an oxidation pond and a secondary sedimentation pond which are orderly connected, and the system also comprises a disinfection pond, a slag pond, a slag concentration tower and a sludge dewatering machine. When the system is operated, the wastewater passes through wide and narrow grilles to remove large impurities and enters the aerated grit chamber for sedimentation treatment, the discharged water enters the hydrolysis acidification pond; by a sludge bed in the hydrolysis acidification pond, the wastewater and reflux slag sludge are captured and the slag sludge is decomposed; the wastewater after the sedimentation treatment passes through a fixed type biological bed in the oxidation pond for biological treatment, the discharged water enters the secondary sedimentation pond for slag sedimentation, the discharged water after the slag sedimentation enters the disinfection pond for disinfection treatment, the water after the disinfection treatment can be discharged or reutilized, and the sedimentation slag is sent to the slag pond, and is concentrated by the slag concentration tower and is sent to the sludge dewatering machine for dewatering treatment. The sludge and wastewater free treatment system has the advantages of low equipment investment, low operating cost and good effect of wastewater treatment.