RU2270809C2 - Integrated waste water treatment plant - Google Patents

Integrated waste water treatment plant Download PDF

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Publication number
RU2270809C2
RU2270809C2 RU2004100465/15A RU2004100465A RU2270809C2 RU 2270809 C2 RU2270809 C2 RU 2270809C2 RU 2004100465/15 A RU2004100465/15 A RU 2004100465/15A RU 2004100465 A RU2004100465 A RU 2004100465A RU 2270809 C2 RU2270809 C2 RU 2270809C2
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RU
Russia
Prior art keywords
wastewater
waste water
clarifier
treatment
disinfection
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RU2004100465/15A
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Russian (ru)
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RU2004100465A (en
Inventor
Николай Иванович Куликов (RU)
Николай Иванович Куликов
Андрей Игнатьевич Судьин (RU)
Андрей Игнатьевич Судьин
Елена Николаевна Куликова (RU)
Елена Николаевна Куликова
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Николай Иванович Куликов
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

FIELD: waste water treatment.
SUBSTANCE: invention relates to apparatuses for treating household and compositionally related industrial waste waters as well as landscape waste waters and can be used in communal services of villages, urban settlements, tourist complexes, large recreation centers, when treating landscape sewages, e.g. from fur farming areas, aperies, food industry enterprises. Plant comprises filtering self-cleaning apparatus, consumption equalizer, reagent system, clarifier, post-treatment bioreactor, and cleaned water disinfection apparatus. Clarifier is constructed in the form of adhesion apparatus with ascending waste water flow and it is filled with brushing packing. Post-treatment bioreactor is provided with brushing packing and air lift recesses. Disinfection apparatus is constructed in the form of three filter steps filled with each step-specific grainy catalyst. First filter step has descending waste water flow and the second and third ones have ascending waste water flow and bubbler system.
EFFECT: increased impurities removal efficiency, simplified operation, reduced dimensions of equipment, and reduced operation expenses.
4 dwg

Description

The invention relates to a device for treating domestic and close in composition industrial wastewater, as well as landscape wastewater, and can be used in public utilities in villages, towns, tourist complexes, large recreation centers, when cleaning landscape effluents, for example, from the territory of animal farms , monkey nurseries, food industry enterprises, for example, fish factories, fish farms, etc.
It is known the use of combined (physico-chemical, biological and chemical) treatment plants for domestic wastewater [1], including reagent treatment of effluents with coagulants and flocculants, sedimentation, biological treatment in natural biological treatment plants (biological ponds) and disinfection of purified water by chlorination.
Such plants occupy a large territory and do not guarantee the high quality of treated wastewater in all periods of the year.
The closest set of devices that complete the compact sewage treatment plant is the [2] FLOPAK company of Degremon (France), which, after separating the mechanical impurities by filtering and averaging the wastewater flow rate, also includes coagulating contaminants, separating them from the water by settling, and biological treatment in a submersible biofilter loaded with granules of "biolith" - a special material from baked clay, which has developed open macroporosity. The introduction of oxygen in the submersible biofilter is carried out by recirculation of the purified water and by supplying air to the loading space of the biofilter. Further, the purified water is disinfected.
In the known installation can be upgraded, with the intensification of the cleaning process several times, simplifying operation, increasing the cleaning depth by such indicators as ammonia nitrogen, BOD, COD, devices such as bleach, biofilter and disinfectant.
The objective of the invention is to increase the efficiency of removing impurities from water, simplifying operation, reducing the volume of capacitive structures and operating costs.
The problem is solved due to the fact that in the known design of the device, the sump for separating coagulated and flocculated impurities from the waste fluid is performed in the form of an adhesive filter. Adhesion of suspensions is carried out on polymer ruffs in an upward flow of wastewater.
Biological wastewater treatment is carried out in a bioreactor with a brush nozzle and airlift saturation of the treated wastewater with oxygen. At the same time, part of the fibers in the ruffs is kept nitrifying, and part of the denitrifying biocenosis. Disinfection of purified water is carried out in filters with catalytic granular loading in three stages. In the first stage of disinfecting filters, the movement of wastewater is from top to bottom and they have devices for periodic washing of the load, in the second and third stages of filters the movement of water is carried out from bottom to top with continuous supply of air for loading through the aeration bubbler system.
The velocities of the ascending and descending flows of wastewater in all plant devices are regulated depending on the composition of the wastewater.
An analysis of the known technical solutions related to wastewater treatment devices in a similar combination and their mutual arrangement showed that no technical solutions containing the same set of essential features as in the claimed installation were found.
This allows us to conclude that the claimed installation meets the criterion of "novelty."
An analysis of the essential features distinctive from the prototype showed that such or similar features were not found in the known technical solutions with such a combination of placement and relative position, which allows us to conclude that the claimed installation meets the criterion of "significant differences".
The construction of the installation is illustrated by drawings, in which Fig. 1 shows a general view of the first block module located on the first floor of a two-story treatment plant, Fig. 2 shows a general view of the second block module located on the second floor of a treatment complex. Figure 3 shows the high-altitude diagram of the movement of wastewater through the treatment plant. Figure 4 shows a diagram of the movement of precipitation in a treatment plant.
The combined wastewater treatment plant consists of two block containers. The upper block container - 1 (Fig. 2) contains a self-cleaning filter device (UFS) - 2, a container - 3 garbage removed from UFS, a vermicomposter 51 for processing sediments with vermiculture, a tank - 4 preparations and dosing of a coagulant solution, a tank - 5 preparations and dosing of flocculant solution, electric panel - 6 power supply of the treatment plant, room - 7 for the operator serving the installation, hatch - 8 with a lid for access to the lower block container - 9 (Fig. 1). The block container 9 includes a capacity of the flow averager 10, a pump 11 for supplying effluents to the column 12 (FIG. 3) with mixing and flocculation chambers having a mechanical stirrer 13, driven by a motor 14; a clarifier column 15 filled with a brush nozzle 16 on the frame 17, a pipe 23 (FIG. 4) for withdrawing regeneration liquid from the clarifier 15 to a reserve tank 24 located in the averager 10, using pump 11, a pipe 18 (FIG. 3) of the overflow to be cleaned liquid from clarifier 15 to the bioreactor 19 of wastewater treatment, equipped with a brush nozzle 16 on the frame 17, a bubbler 20 (Fig. 3) for aeration of the wastewater in the airlift niche 21 and a bubbler for regeneration of the brush nozzle 16, pipelines 22 (Fig. 4) of the recovery outlet fluid from the bioreactor 19 to the reserve capacity 24 using a pump 11 and a pipe 25 (figure 3) to drain purified water into the tank 26 of the filter of the first stage of disinfection, filled with a granular catalyst 27 (figure 3) above the supporting layer of crushed crushed stone 28 (figure 3), under which is laid the cap system of pipelines 29 (Fig. 3) for supplying washing water in the form of an air-air mixture using a pump 11 from a reservoir 30 (Fig. 3) of clean water with air supply from a working blower 31, having a reserve in the form of an aggregate 32, through a pipe 33 (Fig. .3); the second stage filter tank 34, equipped with a granular catalyst 35 (Fig. 3) above the perforated bottom 36 (Fig. 3), along which aeration bubblers 37 (Fig. 3) are laid, connected to the air supply pipe 33 (Fig. 3), the pipe 38 (Fig. 3) for supplying wastewater from the reservoir 26 and pipeline 39 (Fig. 3) for discharging the treated wastewater to the tank 40 of the third stage of the disinfection filter, a wastewater equipped by analogy with the tank 34 of the second stage filter, but with another granular catalyst 41 (figure 3) above the perforated bottom 36 (FIG. 3) with aeration bubblers 37 (FIG. 3) connected to the air supply pipe 33 (FIG. 3), the duct 42 (FIG. 3) of a cleaned and decontaminated waste fluid discharge into the clean tank 30 (FIG. 3) water, from which water can be directed through the pipe 43 (figure 3) to the pump 11 for flushing or through the pipe 44 (figure 3) for discharge into the nearest surface watercourse or for reuse for household needs; silt pad 45, communicated with the reserve capacity 24 of the pipeline 46 (figure 4), a vacuum pump 47 (figure 4) using the duct 48 (figure 4), with the pump 11 using the pipe 49 (figure 4); tray 50 for unloading the dehydrated sludge from the sludge platform 45, mixing it with sorted waste from the tank of the container 3 (Fig. 1) and sawdust and loading this mixture into the vermicomposter 51 (Figs. 2, 4).
Installation of combined wastewater treatment works as follows.
Wastewater enters UFS 2 into the upper block container 1. Flowing down the grid, the water is separated from impurities larger than the screen gaps. The waste water flows to the lower part and with a moisture content of about 60% falls into the tank container 3. Water after UFS 2 is divided into two streams, one of which is directed to the wastewater flow averager 10 located in the block container 9. The second stream, mixing with the coagulant solution from the supply tank 4 and the flocculant solution from the tank 5, it enters the column 12, where the wastewater with reagents and flocculation of water-insoluble impurities are mixed by a mechanical stirrer 13, driven by rotation of the electric motor 14. If the second stream of wastewater becomes less than the average hourly value, and the first stream does not form at all, then with the help of pump 11, the stocks stored in the averager 10 are pumped into the column 12 with the regulation of the flow rate due to the bypass discharge of some of the pumped effluents back to the averager 10. From the bottom of the column 12, the wastewater flows into the clarifier 15, filled with a brush nozzle 16, mounted on the frame 17.
Moving along the clarifier 15 upward, the wastewater stream is separated from the coagulated and flocculated suspensions, since the fibers of the nozzle 16 receive induced charge during friction with their water, which facilitates the adhesion of the suspensions. As the suspensions accumulate, their discharge begins to increase, and when the limit value is reached, the brush nozzle 16 is regenerated by supplying air to the clarifier 15 through the bubblers 21 and switching the suction of the pump 11c of the averager 10 to the pipeline 23 of the recovery water from the clarifier 15 to the reserve tank 24. After pumping the contents of the clarifier 15, the pump 11 switches to the supply of effluents and the process of cleaning them in the clarifier 15 resumes. From the clarifier 15, the clarified drain through the overflow pipe 18 enters the bioreactor 19, where it circulates and spirals to the outlet pipe 25. The wastewater circulation inside the bioreactor 19 is provided by the air flow from the bubbler 20 located in the airlift niche 21. The airlift niche 21 is separated by a wired plastic frame 17, which holds the ruff nozzle 16. The ruff nozzle, overgrown with microorganisms, contains two types of communities of biocenoses. In the cylindrical volume of the ruff, the peripheral ends of the fibers are well provided with oxygen and a nitrifying biocenosis settles on them. Air bubbles do not penetrate the inner ruff of the ruff, and anoxic conditions are created there, which contributes to the formation of a denitrifying biocenosis around the ruff of the ruff. Two types of biocenoses complement each other well, since the nitrifying biocenosis gives acidification of the effluent, and the denitrifying biocenosis gives alkalization. The increase in the nitrifying biomass of microorganisms provides nutrition during its death, to the denitrifying biocenosis. If the brush nozzle 16 is overgrown with excess biomass of microorganisms and suspensions taken out from the clarifier 15, it is regenerated by supplying air through a bubbler 20 located under the brush nozzle 16, while pumping the contents of the bioreactor 19 by switching the pump 11 to the pipe 22 and supplying the regeneration liquid to the reserve tank 24. The effluent from the pipeline 25 enters the upper part of the tank 26 of the filter of the first stage of disinfection. The granular filter loading of the first-stage filter consists of a catalyst 27 located above the supporting layer of crushed crushed stone 28, under which a cap system of pipelines 29 for supplying washing water in the form of an air-air mixture from a pump 11 is laid, the suction of which is switched to a clean water tank 30. The sludge washed from the filter of the first stage is discharged into the flow averager 10. Air is supplied to the cap distribution system of pipelines 29 from a working blower 31 having a backup unit 32 through a pipe 33. From the first stage filter tank 26 through the pipe 38, water is discharged into the second stage filter tank 24 loaded with the particulate catalyst 35 above the perforated bottom 36, by to which an aeration bubbler 37 is laid, connected by the air supply pipe 33 of the second stage filter tank 34. Further, the effluents from the tank 34 are discharged by a pipe 39 to the tank 40 of the third filtration stage, equipped by analogy with the tank 34 with a bubbler 37 from the air supply pipe 33 along the perforated bottom pan 36. The tank 40 is filled with a granular catalyst 41, which provides the last, highest degree of disinfection of the treated waste fluid . From the tank 40, purified water is discharged through a pipe 42 to a clean water tank 30, from which it can be sent to a pump 11 through a pipe 43 and used to flush the first-stage filter, or through a pipe 44 to be discharged to the nearest surface water body or for reuse in household needs. Wastewater sludge after thickening it in the tank 24 through pipeline 46 is fed to the sludge platform 45, where it is dehydrated to a moisture content of 82-86% due to the vacuum created by the vacuum pump 47 through the duct 48. The filtrate from the sludge pad 45 is periodically removed by the pump 11 through pipeline 49 to the average cost of 10. The dewatered sludge from the sludge platform 45 is discharged into a pallet 50 and then, after mixing with sorted waste from the tank of the container 3 and sawdust, it is loaded into the capacity of the vermicomposter 51. The sediment processed by the vermicompost and kept in the vermicomposter for one month is packed into bags, certified and sent as vermicompost for fertilizing agricultural land, flower beds, green-park zone. Achieving this goal - the intensification of the process of clarification of waste fluid that has undergone reagent treatment with a coagulant and flocculant in the clarifier by filling the clarifier with an active brush nozzle is confirmed by a simple comparison of the velocities of the ascending flow of the wastewater in a vertical settler (at the level of 0.1 mm / s) and in the clarifier with a brush nozzle (up to 10 mm / s). With a wastewater flow rate of 2 m 3 / h, the sump should be 1.5 hours long, while the clarifier should be no more than a quarter hour, i.e. 6 times less. The reason for the intensification of the clarification process lies in the fact that the coagulant (positively charged iron or aluminum oxides) coagulates negatively charged suspensions of the waste fluid (clay particles, microorganisms, etc.) and give a positive charge to conglomerates. The added negatively charged flocculant (e.g., polyacrylamide) gives negatively charged flocs that are held in a positively charged brush nozzle. In a bioreactor with a ruffled nozzle, a gain in volume as compared with the prototype is achieved due to the higher porosity of the ruffled nozzle (98-99%), the porosity of the biolith is about 40% with twice the surface of the ruff to hold biomass of microorganisms per unit volume of the bioreactor. The use of catalysts for the disinfection of purified water with peroxides formed due to the activation of oxygen in the air and oxygen dissolved in water in contact with the catalyst eliminates the dosing of reagents (chlorine or hypochlorite), or the consumption of electricity during UV disinfection with all care for UV lamps radiation, which simplifies the operation of the treatment plant and reduces operating costs. In addition, the catalysts along with disinfection provide deep oxidation of organic substances, nitrites are oxidized to nitrates, and ammonium nitrogen is reduced to trace values, which guarantees a deeper wastewater treatment compared to the prototype or any other combined wastewater treatment plants.
Information sources:
1. A.D. Smirnov. Methods of physico-chemical water purification. Analytical review. Issue 18. Purification of natural and waste waters. VNTITS. - M .: 1985. - p.12-14.
2. G.N. Lutsenko, A.I. Tsvetkova, I.Sh. Sverdlov. Physico-chemical treatment of urban wastewater. - M .: Stroyizdat, 1984. - p. 66.

Claims (1)

  1. Installation of combined wastewater treatment, including a self-cleaning filtering device, flow averager, reagent farm for coagulation and flocculation of wastewater impurities, a clarifier for separating coagulated impurities, a post-treatment bioreactor and a device for disinfecting purified water, characterized in that the clarifier is made in the form of an adhesive with ascending the wastewater stream filled with a brushed nozzle, the post-treatment bioreactor is equipped with a brushed nozzle and airlift niches for recirculation of sewage through ruffs overgrown with biocenosis, including nitrifying, and the device for disinfection is made in the form of three stages of filters filled with a granular individual catalyst in each stage, while the first stage of the disinfection filters has a downward flow of wastewater, and the second and third have upward flows of wastewater and bubbler system for continuous air sparging.
RU2004100465/15A 2004-01-05 2004-01-05 Integrated waste water treatment plant RU2270809C2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2464239C1 (en) * 2011-04-27 2012-10-20 Государственное образовательное учреждение высшего профессионального образования "Уфимский государственный нефтяной технический университет" Gray waste water biological treatment plant
RU2613952C1 (en) * 2013-03-14 2017-03-22 ЭКОЛАБ ЮЭсЭй ИНК., System for polymer dilution
RU2629076C2 (en) * 2015-05-20 2017-08-24 Государственное Унитарное Предприятие "Водоканал Санкт-Петербурга" Method of purifying drinking water and station for its implementation
RU2747102C1 (en) * 2020-01-20 2021-04-26 Общество с ограниченной ответственностью "Башкирская генерирующая компания" Wastewater treatment installation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ЛУЦЕНКО Г.Н., ЦВЕТКОВА А.И., СВЕРДЛОВ И.Ш. Физико-химическая очистка городских сточных вод, Москва, Стройиздат, 1984, с.66. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2464239C1 (en) * 2011-04-27 2012-10-20 Государственное образовательное учреждение высшего профессионального образования "Уфимский государственный нефтяной технический университет" Gray waste water biological treatment plant
RU2613952C1 (en) * 2013-03-14 2017-03-22 ЭКОЛАБ ЮЭсЭй ИНК., System for polymer dilution
US9682347B2 (en) 2013-03-14 2017-06-20 Ecolab Usa Inc. Polymer dissolution system
RU2629076C2 (en) * 2015-05-20 2017-08-24 Государственное Унитарное Предприятие "Водоканал Санкт-Петербурга" Method of purifying drinking water and station for its implementation
RU2747102C1 (en) * 2020-01-20 2021-04-26 Общество с ограниченной ответственностью "Башкирская генерирующая компания" Wastewater treatment installation

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Effective date: 20100106