RU2120417C1 - Method of treatment of cattle-breeding flows - Google Patents

Method of treatment of cattle-breeding flows Download PDF

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Publication number
RU2120417C1
RU2120417C1 RU97108242A RU97108242A RU2120417C1 RU 2120417 C1 RU2120417 C1 RU 2120417C1 RU 97108242 A RU97108242 A RU 97108242A RU 97108242 A RU97108242 A RU 97108242A RU 2120417 C1 RU2120417 C1 RU 2120417C1
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Russia
Prior art keywords
treatment
flows
preliminary
tank
digester
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RU97108242A
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Russian (ru)
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RU97108242A (en
Inventor
А.А. Ковалев
В.П. Лосяков
А.Н. Ножевникова
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Всероссийский научно-исследовательский институт электрификации сельского хозяйства
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Priority to RU97108242A priority Critical patent/RU2120417C1/en
Application granted granted Critical
Publication of RU2120417C1 publication Critical patent/RU2120417C1/en
Publication of RU97108242A publication Critical patent/RU97108242A/en

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Abstract

FIELD: agriculture. SUBSTANCE: invention relates to manure processing in cattle-breeding farms, in part, treatment of flows at moisture 97-99%, production biogas and fertilizers. Method involves preliminary removing rough-dispersed inclusions and then flows are subjected for preliminary treatment in aerotank where methane-tank is assembled which ferments an active silt after preliminary and two-stage aerobic treatment. Temperature regime in methane-tank is maintained due to aerotank heat at the stage of preliminary treatment. Method ensures treatment of flows, producing fertilizers, biogas and relatively pure water and fermentation of an active silt in methane-tank without energy consumption. EFFECT: improved method of treatment, enhanced effectiveness of process. 1 dwg

Description

 The invention relates to the field of processing manure of livestock farms, in particular to the treatment of farm effluents with a moisture content of 97 - 99% and the production of biogas and fertilizers.
 A known system of biological wastewater treatment of livestock complexes (ed. St. USSR N 1224275, class C 02 F 3/32), containing biological ponds and a device for aeration. The system is equipped with two meandering trenches for separating coarse impurities attached to an aeration device made in the form of a channel with aerator barriers cascaded in the direction of the flow of water and connected to biological ponds.
 The system is bulky, takes up a lot of land, and biological ponds need to be cleaned and updated every 5-7 years, the filter layer.
 The closest method described in the book: Results of science and technology. Biotechnology. Volume 29. - M.: VINITI, 1991, p. 123, fig. 29.
 The method includes an averager with neutralization of effluents and a reagent farm, a primary sump, a digester, aeration tank, a secondary sump and sludge pits. Treated wastewater is discharged from a secondary sump to a nearby body of water or river.
 The disadvantage of this method is that in aerotanks of the last stage, wastewater with a high BOD content (more than 2000 mg / l) is oxidized. In aeration tanks, complete wastewater treatment is not achieved (BOD 15 ml / l or less).
 The next drawback is that almost the entire volume of the initial effluent is subjected to fermentation under anaerobic conditions, which requires additional capex for digesters and energy for the fermentation process, as well as non-contaminated sludge from the primary settling tanks sent to silt sites.
 The objective of this invention is: the development of waste-free, environmentally friendly technology for cleaning farm effluents with the receipt of fertilizers, biogas and relatively clean water (with BOD 15 mg / l), which can be discharged into a reservoir or river. The development of a cleaning method that does not require energy for the fermentation of activated sludge in a digester.
 As a result of the use of the invention, no additional costs are required for heating the digester, sludge pads and reagent farming are excluded, the volumes of digester and activated sludge are disinfected.
 The above result is achieved by the fact that after separation of coarsely dispersed inclusions, the effluents are pre-treated in aeration tanks, where a digester is mounted, fermenting activated sludge after preliminary and two-stage aerobic cleaning, and the temperature in the digester is maintained due to the heat of the pre-filter aeration tank.
 The invention is illustrated in the drawing. A method for cleaning livestock wastes includes: farm 1, a neutralizing averager 2, pump 3 for mixing wastewater with fermented activated sludge and feeding the mixture to separation plant 4. From the separation plant, a thick fraction is fed to conveyor 5 and then to mixer 6. By the same conveyor from the shoulders 7 are sent to the mixer dry organic fillers (straw, peat, sawdust, etc.). After the mixer, the compost is sent to the shoulders 8. The liquid fraction from the separation unit enters the pre-treatment aeration tank 9, where the digester 10 is mounted. From the pre-treatment, the liquid fraction enters the aeration tanks 11, settling tanks 12 and then discharges into a reservoir or river. Active sludge is pumped into the digester by pump 13; air is supplied to the aeration tanks from below by means of a blower 14. The fermented mass from the digester is pumped by pump 15 to the averager.
The technology for cleaning livestock waste is as follows. Livestock effluents from farm 1 enter the averager-catalytic converter 2, the activated sludge fermented in the digester 10 is pumped into the same tank 15 after cleaning the liquid fraction that has passed through the separation unit 4. The liquid fraction is first pre-treated in the aeration tank 9, where the digester is installed, then a two-stage cleaning in aeration tanks 11 and sumps 12 and with a BOD of 15 mg / l is discharged into a river or reservoir. The methane tank is heated by means of a heated liquid fraction in the aeration tank 9, which was dissolved during oxidation. Pump 13 pumps activated sludge into the metal tank. The fermented sludge, entering the homogenizing neutralizer, is mixed by pump 3 and the same pump feeds mixed effluents to separation plant 4. The thick fraction from the separation plant is fed to conveyor 5 and then to mixer 6. By the same conveyor dry organic substances are fed from bumps 7 to the mixer fillers (straw, peat, sawdust, etc.). Mixed organic matter (compost) with a moisture content of 50 - 70% is flaking; in collars due to air oxygen, the mass is heated to 60 o C or more, decomposes and disinfected. After 2 to 3 weeks, compost is ready as fertilizer. This technology eliminates the heating of the digester, as well as the liquid fraction that has undergone preliminary and two-stage purification, with a BOD of 15 mg / l can be drained into the river or reservoir.

Claims (1)

  1.  A method for cleaning livestock wastes, including aerobic and anaerobic digestion, flaking, characterized in that after separation of coarse inclusions, the wastewater is pre-treated in an aeration tank, where a digester is mounted, fermenting activated sludge after preliminary and two-stage aerobic cleanings, and the temperature regime in the digester is maintained by heat aeration tank pre-treatment.
RU97108242A 1997-05-19 1997-05-19 Method of treatment of cattle-breeding flows RU2120417C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU97108242A RU2120417C1 (en) 1997-05-19 1997-05-19 Method of treatment of cattle-breeding flows

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU97108242A RU2120417C1 (en) 1997-05-19 1997-05-19 Method of treatment of cattle-breeding flows

Publications (2)

Publication Number Publication Date
RU2120417C1 true RU2120417C1 (en) 1998-10-20
RU97108242A RU97108242A (en) 1999-02-10

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RU97108242A RU2120417C1 (en) 1997-05-19 1997-05-19 Method of treatment of cattle-breeding flows

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD417Z (en) * 2010-03-23 2012-05-31 Александр МИХАЙЛЕНКО System for biochemical reprocessing of livestock organic waste
RU2474102C1 (en) * 2011-07-19 2013-02-10 Юрий Александрович Киров Method of processing of livestock wastes
CN105271610A (en) * 2015-06-18 2016-01-27 北京建研环保设备有限公司 Comprehensive processing process of culturing farm cow dung waste water
RU2688410C1 (en) * 2018-02-12 2019-05-21 федеральное государственное бюджетное образовательное учреждение высшего образования "Самарская государственная сельскохозяйственная академия" Method for processing livestock waste

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
1. Итоги науки и техники. Биотехнология. Изд. - М.: ВИНИТИ, т.29, 1991, с.123, рис.29. 2. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MD417Z (en) * 2010-03-23 2012-05-31 Александр МИХАЙЛЕНКО System for biochemical reprocessing of livestock organic waste
RU2474102C1 (en) * 2011-07-19 2013-02-10 Юрий Александрович Киров Method of processing of livestock wastes
CN105271610A (en) * 2015-06-18 2016-01-27 北京建研环保设备有限公司 Comprehensive processing process of culturing farm cow dung waste water
RU2688410C1 (en) * 2018-02-12 2019-05-21 федеральное государственное бюджетное образовательное учреждение высшего образования "Самарская государственная сельскохозяйственная академия" Method for processing livestock waste

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