Biological oxidations contact stabilization pond
(57) Abstract:Use: preparation and wastewater treatment. The inventive biological oxidations contact stabilization pond contains water, layers filled with sand, gravel, sand planted with aquatic vegetation. These reservoirs are in communication with the reservoir, equipped with a level switch and a pumping unit with a control system, a motor and a software device. The invention allows to clean waste water throughout the year due to optimised treatment in anaerobic conditions, as well as to reduce the area under ponds. 2 Il. The invention relates to the preparation and treatment of wastewater.Known biological oxidations contact stabilization /BOXING/ pond in which to ensure deworming drains at release and reducing the size of the device by reducing sediment and provide vertical movement to the receiving device, the distribution device is made in the form of an annular perforated pipe, and the water intake device of an elastic cylinder with swivel clamps and spacer rings having saedinaiushaia /auth.St. USSR N 1183462, CL CO 2 F 3/30, 1985/.A disadvantage of the known BOXING pond is that it does not work in winter conditions, when the cleaning process is carried out under anaerobic conditions.The purpose of the invention is the provision of wastewater treatment in anaerobic conditions.The objective is achieved by the fact that the water layers filled with sand, gravel, sand planted with aquatic vegetation and is connected with the tank, equipped with a level switch and pump Assembly.In Fig. 1 shows a diagram BOXING ponds; Fig. 2 BOXING pond, longitudinal section.Biological oxidant stable contact /BOXING/ ponds, designed to work both growing and growing seasons and based on biological wastewater treatment in anaerobic conditions.BOXING ponds contain capacity, layers filled with sand 2 gravel 3 sand 4 planted with aquatic vegetation 5, connected by pipes 6 and 7 are equipped with valves 8 and 9 with the electric motors 10 and 11, with the tank 12, provided with a level switch 13 and the pump 14 and motor 15, the motor 16 and the suction pipe 17, with the tank 18 having a relay urovnya electric motor 23, connected to the level switch 19. The motors 10 and 11 are connected to the motor control 24 that has a software device 25. The control system of the electric motor 16 is connected to a level switch 13.BOXING ponds are as follows.The initial population of the sewage six tanks are made for manual control of the valves 8 and 9 with the electric motors 10 and 11. After that, the control valves 8 and 9 with the electric motors 10 and 11 are transferred to the auto mode.At the beginning of the seventh day software device 25 closes the circuit of the motor control 24, including the electric motors 10 and 11, opening the valve 9 in the first tank and the valve 8 in the seventh capacity. When open the valve 9 decontaminated waste water from the first tank 1 through the pipe 7 flows into the reservoir 18.During filling of the tank 18 level switch 19 closes the circuit of the control motor 23, including the motor 22 and the pump 21 pumps the liquid waste into the irrigation network. After emptying the first tank 1 level of waste water in the tank 18 is reduced and the level switch 19 opens circuit control motor 23, while electr electric motor 16, including the electric motor 15, and the pump 14 pumps contaminated waste water from the tank 12 in the seventh container 1 during the day. At the beginning of the eighth day, a programming device 25 closes the circuit of the motor control 24, including the electric motors 10 and 11 and opening the valve 8 in the first and the valve 9 in the second tank and closing the valve 9 in the first and the valve 8 in the seventh tanks. Decontaminated waste water from the second tank 1 flows into the reservoir 18, and contaminated waste water during the day is pumped into the first tank 1 from the tank 12.This process is periodically repeated. Using the proposed BOXING ponds is achieved wastewater treatment in anaerobic conditions, which will reduce the square BOXING ponds and to provide year-round cleaning. Biological oxidations contact stabilization pond containing water basins with sloping bottoms and aquatic vegetation, pipelines supply and discharge of wastewater, characterized in that the water layers filled with sand, gravel, and sand, which is planted with aquatic vegetation, and equipped with tanks with level switch and pump unit.
FIELD: aeration systems in sewage purification; technologies of sewage purification.
SUBSTANCE: the invention is pertaining to technologies of sewage purification and may be used for biological purification of sewage at sewage treatment plants of municipal economy. The aeration system in the aerotank includes at least two zones located over the corresponding sections of the aerotank bottom, one of the zones is a zone of nitrification, and the other is a zone of denitrification. In the zone of nitrification are located pneumatic aerators gathered in the corresponding modules and placed in a benthic part of the corresponding section of the bottom of the aeration tank. At least in each zone there is a group of aerators formed from the pneumatic aerators. The group of aerators located in the zone of nitrification is formed from the porous tubular aerators, and the group of aerators located in the zone of denitrification is formed from the perforated tubular aerators. At that within the limits of each of the mentioned groups the aerators gathered in the aerating modules and are located in the corresponding benthic parts of the aeration tank with a capability of formation in it of a broad strip of aeration. The technical result is an increase of intensity of the sewage purification with an increase of the speed of the biological purification process.
EFFECT: the invention ensures an increased intensity of the sewage purification and increased speed of the biological purification process.
3 tbl, 5 dwg
FIELD: treatment of sewage; biological cleaning of waste water in purification works.
SUBSTANCE: proposed method includes forming of at least two zones above respective sections of aerotank bottom: one zone is used for nitrification and other zone is used for de-nitrification. Aerobic conditions are created in nitrification zone and anoxide conditions are created in de-nitrification zone. Fine-bubble aeration is performed in nitrification zone with the aid of pneumatic aerators which are preliminarily located in near-bottom part of respective section of aerotank bottom. Wide band of aeration is formed in two zones of aerotank. Medium-bubble and/or coarse-bubble aeration is performed in de-nitrification zone by means of other pneumatic aerators which are preliminarily located in near-bottom part of respective section of aerotank.
EFFECT: enhanced intensity of cleaning sewage due to increased rate of biological purification.
14 cl, 5 dwg, 3 tbl
FIELD: preservation of the environment; methods of biological purification of waste waters.
SUBSTANCE: the invention is pertaining to the field of environmental control and may be used in a municipal services and different branches of industry at construction of new and renovation of the existing Waste waters disposal plants. Waste waters together with a mixture of the suspended active sludge and free-floating nozzles are fed into a bioreactor containing an anaerobic area and an aerobic area. In an aerobic area the mixture is divided into two streams. One stream is returned for mixing with the initial waste waters, and the other stream is guided into a desilter for a preclarification with production of the dense active sludge being returned in the aerobic area, and a mixture of excessive sludge and the biologically purified waste waters. Conduct a controlled feeding of the air into the bioreactor. In the anaerobic area the waste waters are forced in a circulating motion in the closed channel formed at least by one septum by mechanical or pneumatic action. The reservoir of the device is supplied with the water-feeding and water-withdrawing chutes. The desilter is supplied with a septum not reaching to the bottom the reservoir with opening and stream-guiding deflectors. The technical result of the invention is an increased degree of the waste waters purification from suspended substances, and also from organic compounds, ammonium compounds and phosphor; exclusion of conditions for increasing concentration of metabolism products.
EFFECT: the invention ensures an increased degree of the waste waters purification from suspended substances, organic compounds, ammonium compounds and phosphor, exclusion of conditions for increasing concentration of metabolism products.
13 cl, 1 tbl, 4 dwg
FIELD: purification of the urban sewage and industrial waste waters.
SUBSTANCE: the invention is pertaining to the field of purification of the urban sewage and also the waste waters of the food-processing industry and cattle-breeding complexes and is intended for removal from the urban sewage liquor and the industrial waste waters of phosphor in the form of ions PO4 3-. The method of removal of phosphor from the sewage liquor includes the mechanical, biological, physicochemical purification with return of the phosphor depleted compacted active sludge from the sludge concentration tank into the aerotank, with feeding into the sludge concentration tank of the sludge water enriched with the volatile fatty acids produced in the acidoficator working with the crude sediment from the primary settlers in the mode of the first stage of the anaerobic fermentation. At that the redundant active sludge released from the ions PO4 3- in the sludge concentration tank is added into the acidoficator. Due to injection into the acidoficator of the redundant active sludge the shortage of the organic substances is compensated at the low values of the biochemical oxygen demand of the initial sewage liquor and it ensures the necessary amount of the volatile fatty acids fed into the sludge concentration tank for realization of the dephosphatization process. The method is characterized by reduction of the operational costs of purification of the sewage and industrial waste waters from phosphor.
EFFECT: the invention ensures the necessary amount of the volatile fatty acids fed into the sludge concentration tank for realization of the dephosphatization process.
FIELD: biological purification of waste water.
SUBSTANCE: proposed method includes mechanical purification of waste water in first settler followed by delivery of waste water to bioactivator containing micro-flora where zones at heterogeneous content of oxygen in medium are maintained by controllable introduction of oxygen; then mixture of waste water with activated sludge is directed to secondary settler for separating the mixture into purified waste water and activated sludge which is continuously returned to the beginning of bioactivator. Sediment after first settler is recirculated to primary settler inlet for creating the hydrolysis process and heteroacetogenic process directly in primary settler. Zones of medium at heterogeneous content of oxygen are formed in secondary settler by regulating the rate of recirculation of activated sludge from secondary settler to bioactivator inlet. Zones of medium at heterogeneous content of oxygen in bioactivator are distributed horizontally.
EFFECT: reduction of volume of sediment and excessive activated sludge; low cost of maintenance of purification works; enhanced operational efficiency of purification works.
17 cl, 6 dwg, 3 tbl
FIELD: food processing industry; microbiological industry; methods of production of the biogas during fermentation of the organic substances.
SUBSTANCE: the invention is pertaining to the method to increase output of the biogas during fermentation of the organic substances due to initiating participation of the micro-organisms may be used in the microbiological industry and the food-processing industry. The method is realized in the methane-tank (2) with the system of the electrodes (1), the stirrer (3) and its lower part made in the form of the parabola (4). The system of the electrodes (1) has the different in height inter-electrode spacing intervals, that allows to realize the discharges in the form of the traveling wave due to the fact that at first one pair of the electrodes with the smaller spacing interval is actuated and then the other pair of the electrodes with the greater spacing interval is actuated. The water solution of the organic substrate is subjected to the action of the high-voltage discharge pulses by the system of the electrodes (1) ensuring the periodical step-by-step electrohydraulic treatment in the process of preparation for the anaerobic thermophilic or mesophilic fermentation. The lower part of the methane-tank made in the form of the parabola (4) ensures the directed formation of the impulse energy. The technical result of the invention is acceleration of the anaerobic process of the fermentation of the organic substances, the increased quantity of the methanogennic bacteria, the more complete splitting of the organics and the increased output of the biogas.
EFFECT: the invention ensures acceleration of the anaerobic process of the fermentation of the organic substances, the increased quantity of the methanogennic bacteria, the more complete splitting of the organics and the increased output of the biogas.
2 cl, 2 ex, 1 dwg
FIELD: treatment of domestic and industrial sewage water for aerobic biological purification process for removal of organic and mineral contaminants, may be utilized in large-scale and average-scale purification stations.
SUBSTANCE: method involves providing processes of sieving, flotation, averaging consumption and contaminant concentration before feeding of sewage water for aerobic biological purification process, with basic sewage water being preliminarily subjected to flotation separation process; directing clarified sewage water into consumption and contaminant concentration averaging device; directing flotation concentrate into anaerobic reactor for fermentation at acid fermentation stage; separating fermented flotation concentrate into liquid and solid phases using screw-type thickeners and strainers; accumulating liquid phase in specialized accumulators for mixing with sewage water fed from consumption and contamination concentration averaging device for aerobic biological purification process; discharging solid phase in container for further disposal onto landfill for solid domestic wastes.
EFFECT: simplified sewage water purification process, reduced capital and operating expenses, and decreased consumption of power.
4 cl, 1 dwg, 2 ex
FIELD: waste water treatment.
SUBSTANCE: invention relates to processes of biologically treating domestic and compositionally equivalent industrial waste waters. Process comprises consecutive holding of a consortium of microorganisms removing organic and mineral impurities from waste waters under anaerobic, anoxide, and aerobic conditions in container constructions with intensive mass exchange provided by stirrers, pumps, and air bubbling. Recycled active sludge from secondary settlers is mixed with fresh waste water stream having passed grates and sand-catchers. Resulting mixture is subjected to flotation treatment, after which flotation concentrate is held for at least half-hour in anaerobic bioreactors at continuous stirring and clarified fluid with sludge water is loaded to denitrificator along with circulating stream of sludge mix from denitrificator outlet and anaerobically treated flotation concentrate. Further, sludge mix from denitrificator is routed to nitrificator, wherein it is subjected to air bubbling. Biomass of excess active sludge augmented under aerobic conditions of nitrificator is dewatered to cake state and subjected to biocomposting under aerobic conditions in mixture with sawdust without loss of phosphorus so that phosphorus-rich biohumus is obtained.
EFFECT: reduced volume of container constructions and power consumption on removal of phosphorus from waste water and increase of phosphorus in biohumus obtained from active sludge grown on treatment plant.
FIELD: mechanics; chemistry.
SUBSTANCE: completely-block modular clearing station includes tanks of multistage biological sewage treatment by communities attached on a filamentary brush mounting attachment and free-floating microorganisms of active silt, desilting devices and sludge thickeners, the devices dehydrating deposits of sewage and communications for a supply and a tap of sewage, feedings of air, a tap of collecting deposits. The clearing station is executed in the form of, at least, four-storeyed building of tower type with the isolated arrangement of bioreactors. The station is supplied with air ejectors, placed on a ground floor and communicated through air intake channels with the ventilating chamber passing from top to bottom through all floors of clearing station and arranged floor-by-floor with ventilation ducts. The station also is arranged by the ventilators assigning damp air, completed in bioreactors for limits of a building of clearing station through clearing and disinfecting devices, supplied by biopunchers for processing of the dehydrated deposits of sewage, ripening and drying at the expense of warm air heated in the air ejectors.
EFFECT: lowering of specific expenditures of the electric power on unit of cleared sewage, improvement of hygienic working conditions of serving staff and abbreviation of the area of the earth assigned under clearing station.
FIELD: sewage treatment facilities.
SUBSTANCE: invention is related to the field of biological purification of sewage from organic compounds, nitrogen and phosphorus. To realise the method, the following hydraulically communicated stages - anaerobic, anoxic, aerobic - are performed for treatment with activated sludge with membrane separation, stage of deaeration that precedes stage of anaerobic treatment, stage of powdered activated carbon (PAC) treatment with membrane separation. Method also includes recirculation of sludge mixture from the aerobic treatment stage to stage of deaeration and recirculation of sludge mixture from anoxic stage to anaerobic stage. Purified water after serial anaerobic stage at load on activated sludge by "БПК" of 2.0-4.0 mg/g·hr and anoxic stage at load on activated sludge by nitrogen of 3.5-4.5 mg/g·hr, "БПК" of 8-13 mg/g·hr is supplied directly to the stage of aerobic treatment with membrane separation. At that load on activated sludge by nitrogen makes 0.8-1.2 mg/g-hr, by oil products - 0.5-0.7 mg/g·hr, according to synthetic surfactants - 0.16-0.22 mg/g·hr and by phenols - 0.18-0.25 mg/g·hr. At the stage of anoxic treatment 80-90% of recirculated sludge mixture is supplied from deaeration stage. Water purification with PAC is carried out at concentration of dissolved oxygen to 4.0 mg/l due to supply of compressed air and PAC concentration of 20-30 g/l at its single charging. At that load on PAC by oil products makes 0.35-0.45 mg/g·hr, by synthetic surfactants - 0.06-0.07 mg/g·hr and by phenols - 0.02-0.024 mg/g·hr.
EFFECT: method provides for increased degree of purification from nitrogen and phosphorus, wider range of removed organic compounds, process simplification and reduction of its duration.
2 tbl, 3 ex