RU2049737C1 - Bioreactor for sewage treatment - Google Patents

Bioreactor for sewage treatment Download PDF

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Publication number
RU2049737C1
RU2049737C1 RU9393045212A RU93045212A RU2049737C1 RU 2049737 C1 RU2049737 C1 RU 2049737C1 RU 9393045212 A RU9393045212 A RU 9393045212A RU 93045212 A RU93045212 A RU 93045212A RU 2049737 C1 RU2049737 C1 RU 2049737C1
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Russia
Prior art keywords
grained
bioreactor
filler
coarse
layer
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RU9393045212A
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Russian (ru)
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RU93045212A (en
Inventor
Н.А. Терентьева
В.А. Казарян
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Терентьева Наталья Алексеевна
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Priority to RU9393045212A priority Critical patent/RU2049737C1/en
Publication of RU93045212A publication Critical patent/RU93045212A/en
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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: sewage treatment. SUBSTANCE: bioreactor is comprised of a casing with inlet and outlet pipes and with layers of charge inside. Said layers are arranged downstream of water flow in the following succession: filler peat layer 500 mm high, coarse-grained charge - chemically-active calcium-containing rock, fraction 150-200 mm placed in a single row layer, a layer of peat 500 mm high, a coarse-grained charge crushed stone, fraction 50-100 mm. The chemically-active calcium-containing rock is limestone and/or dolomite and/or marl. EFFECT: improved design. 3 cl, 1 dwg, 1 tbl

Description

 The invention relates to wastewater treatment, in particular to biological treatment, and can be used for the treatment and purification of biologically treated household water and industrial wastewater composition close to them.
A known filter for cleaning liquid containing a housing with inlet and outlet pipes, and layers located in the housing of coarse-grained and fine-grained loading [1]
The disadvantages of the known filter are: the need for washing, insufficient degree of purification from all the wastewater ingredients in the dissolved state, in particular, organic substances evaluated by BOD and COD, oil products, phenols, surfactants, nitrogen compounds, phosphorus, metal ions, etc. d.
 Known bioreactor for wastewater treatment, created on the basis of a frame-charge filter [2] Hole pipes are laid on the surface of the gravel frame of the filter to shake the bioblock load located above them.
 Tertiary treatment of biochemically treated urban wastewater in a combined bioreactor occurs due to the removal of suspended solids and due to the destruction of dissolved impurities. Oxidation of the dissolved components is carried out by immobilized microflora inhabiting the branched surface of the large-porous bioblock filler and granular filter loads.
 The disadvantages of the bioreactor are the complexity of the design, the need to wash the filter layers and regenerate the loading of the bioblock, the insufficient degree of purification from difficultly oxidized organic compounds, evaluated by COD, nitrogen, phosphorus, metal ions, oil products, surfactants.
 The technical result obtained from the use of the proposed device is to simplify the design, eliminating the need to regenerate the loading of the bioblock and washing the granular load, increasing the degree of wastewater treatment from difficultly oxidized organic compounds, evaluated by COD, nitrogen compounds, phosphorus, metal ions, oil products, surfactants.
 The drawing shows a bioreactor.
 The bioreactor consists of a body 1, made in the form of a well, with nozzles for supplying wastewater 2 and drainage of purified water 3. In the body 1 of the bioreactor there are layers of filler of the bioblock of peat 4, coarse 5 and fine-grained 6 loads. The sequence of layers in the bioreactor in the direction of the liquid being purified is as follows: peat filler, coarse-grained chemically active charge, peat filler, coarse-grained chemically active charge, fine-grained charge. As a coarse-grained chemically active load, calcium-containing rocks (limestone, dolomite, marl, etc.) are used with fractions of 150-200 mm, a fine-grained load has an equivalent size of 50-100 mm.
 The bioreactor operates as follows. The inlet pipe 2 into the body of the bioreactor 1 serves wastewater. It passes through the first layer of peat bioblock filler 4. The functional purpose of the bioblock filler is the retention and concentration of suspended and colloidal ingredients of the treated waste water and the concentration of microorganisms that use the delayed ingredients in the metabolism process. Therefore, the material used as a filler of the bioblock must have filtering properties and is an environment favorable for the development of microorganisms. Peat satisfies both conditions. Peat is referred to as the so-called "bioliths", i.e. to rocks formed as a result of biological processes. Bioliths are the environment most suitable for colonization by microorganisms, since they contain everything necessary for life. In addition, the structure of peat allows us to consider it as a filter material. Suspended and colloidal ingredients of wastewater are trapped in the peat layer, and microorganisms attached to peat remove dissolved organic compounds, nutrients (nitrogen and phosphorus), process suspended suspended and colloidal ingredients, transforming complex organic compounds into simpler ones. Optional and aerobic microorganisms work here. As the bioblock filler layer overgrows, it is removed and replaced with a new one. The frequency of replacement is determined by the composition of the wastewater supplied to the treatment. Experimental studies were carried out using peat layers 100, 200, 300 and 500 mm thick as a bioblock filler. The best results were obtained using a peat layer 500 mm thick, which was adopted for this bioreactor. The thickness of the peat layer of 500 mm practically does not increase the efficiency of the removal of wastewater ingredients, while the procedure for replacing the filler layer is complicated.
 After passing through the filler layer, the wastewater passes through the first layer of a chemically active coarse-grained charge 5. The purpose of this layer is to create an area of increased redox potential and increased pH, aerobic microorganisms are activated here and algae, mainly diatoms, develop, thus creating conditions for nitrification, effective removal of phosphates, petroleum products, surfactants, organic compounds evaluated by COD, metal ions, complexation processes. It has been experimentally shown that the values of the generated values of the redox potential depend on the layer thickness and the size of the chemically active charge. When using limestone as a chemically active load, the required value of the redox potential was obtained when stacking fractions of 150-200 mm in one row of limestone. To obtain the same value using fractions <150 mm, a layer of limestone of a greater height will be required, which unreasonably will increase the dimensions of the bioreactor. On this basis, as a coarse-grained loading, a loading of a fraction of 150-200 mm, laid in one row, is used.
 All of the above processes, as well as denitrification, are carried out by microorganisms in the second layer of filler-peat. Then the wastewater passes the second layer of the reactive coarse-grained charge 5, the purpose of which is similar to the first layer of the charge 5. Next, the deep-cleaned wastewater is filtered through the fine-grained charge 6, where it is freed from residues of suspended solids and is discharged from the bioreactor through the pipe 3.
 The minimum height of the layer of fine-grained loading 400 mm with a particle size of 50-100 mm The indicated values are due to the fact that the fine-grained loading layer should perform the following main functions: to remove suspended solids from treated wastewater, have high dirt capacity and process suspended suspended solids, for which it is necessary to maintain aerobic conditions in the volume of the layer. For the effective removal of suspended solids, it is preferable to use a smaller load and a greater layer height, to increase the dirt capacity, a larger load and a higher layer height are required. To maintain aerobic conditions, a larger load and a lower layer height are preferable. It has been experimentally shown that, to perform these functions, it is advisable to take the height of the fine-grained loading layer 400 mm at a particle size of 50-100 mm.
 A decrease in the layer height <400 mm leads to the periodic removal of suspended solids, an increase in the layer height> 400 mm leads to repeated contamination of the treated wastewater with organic compounds as a result of decay processes occurring in the lower layers.
 Reducing the size of the load <50 mm reduces the dirt capacity together with a violation of aerobicity, which also leads to re-contamination of the treated wastewater. With an increase in loading size> 100 mm, an increase in the content of suspended solids in treated wastewater is observed. Based on the foregoing, for this bioreactor, the height of the layer of fine-grained loading adopted 400 mm with a particle size of 50-100 mm
 Thus, so that each bioreactor layer fulfills its functional purpose, the ratio of the heights of these layers: filler, coarse-grained and fine-grained charges is 1: 0.3: 1: 0.3: 0.8 in the direction of the purified water.
 The experimental results at the indicated ratios of the heights of the layers and the peat layer of 500 mm and a comparison with the work of the well-known bioreactor adopted as a prototype are shown in the table.
 From the table it follows that the cleaning efficiency in the proposed bioreactor is higher than in the known one, which allows us to talk about the advantages of the proposed bioreactor. In addition, the proposed bioreactor does not require regeneration of the loading of the bioblock and washing of the granular load, and is also structurally simpler.

Claims (4)

 1. BIOREACTOR FOR WASTE WATER TREATMENT, consisting of a housing with inlet and outlet pipes and layers of a bioblock filler, fine-grained and coarse-grained fillers located in the housing, characterized in that peat is used as a bioblock filler, a coarse-grained charge is made of chemically active calcium-containing rock containing mountainous calcium-containing and the fine-grained fraction from crushed stone is 50 to 100 mm, the sequence of layers in the casing in the direction of the purified water is as follows: peat, coarse loading, peat, coarse grain thawing load, fine-grained loading, while the first layer of bioblock filler is made with the possibility of its replacement.
 2. The bioreactor according to claim 1, characterized in that the height of the layer of the bioblock filler is 500 mm.
 3. Bioreactor according to claims 1 and 2, characterized in that limestone and / or dolomite and / or marl fraction 150-200 mm are used as a chemically active calcium-containing rock.
 4. The bioreactor according to claims 1 to 3, characterized in that the ratio of the heights of the layers of the bioreactor: filler, coarse-grained loading, filler, coarse-grained loading and fine-grained loading in the direction of the purified water is 1 0.3 1 0.3 0.8, respectively.
RU9393045212A 1993-09-23 1993-09-23 Bioreactor for sewage treatment RU2049737C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU9393045212A RU2049737C1 (en) 1993-09-23 1993-09-23 Bioreactor for sewage treatment

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Application Number Priority Date Filing Date Title
RU9393045212A RU2049737C1 (en) 1993-09-23 1993-09-23 Bioreactor for sewage treatment

Publications (2)

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RU93045212A RU93045212A (en) 1995-06-19
RU2049737C1 true RU2049737C1 (en) 1995-12-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT5292B (en) 2003-12-30 2005-12-27 Vilniaus Gedimino technikos universitetas A filter for treatment of rain outflow
RU2659992C2 (en) * 2013-04-26 2018-07-04 Упонор Инфра Ой Arrangement for on-site treatment of greywater effluent

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
1. Авторское свидетельство СССР N 1022722, кл. B 01D 24/46, 1983. *
2. Нечаев А.П., Славинский А.С. и др. Интенсификация доочистки биологически очищенных сточных вод. Водоснабжение и санитарная техника, 1991, N 12, с.18-20. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT5292B (en) 2003-12-30 2005-12-27 Vilniaus Gedimino technikos universitetas A filter for treatment of rain outflow
RU2659992C2 (en) * 2013-04-26 2018-07-04 Упонор Инфра Ой Arrangement for on-site treatment of greywater effluent

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