SU1745706A1 - Method of treatment of animal liquid excrement - Google Patents

Abstract

Using; cleaning of liquefied organic waste from livestock farms. SUMMARY OF THE INVENTION: In a method for treating livestock waste by digestion with heating, aeration, settling, mechanical separation into fractions, only thick phase is fermented after settling, and the liquid is floated with biogas and foam is quenched under pressure under anaerobic conditions, after which the liquid phase is mixed with fermented thick air under pressure, defend and poured into ponds, and the thick fermented phase after settling is subjected to mechanical separation into fractions, the liquid fraction is mixed with the original effluent, and solid u - are dumped in piles. 1 silt, 1 tab. (Ls

Description

The invention relates to methods for the treatment of agricultural waste, in particular for cleaning liquefied organic waste from livestock farms.

The purpose of the invention is to save energy on waste treatment.

The drawing shows a process flow diagram of the method for processing live-water streams.

The method is carried out as follows.

After settling, only the thick phase is fermented, and the liquid is floated with biogas and the foam is quenched under pressure under anaerobic conditions, after which the liquid phase is mixed with fermented thick air under pressure, settled and poured into ponds, and the thick fermented phase after settling is subjected to mechanical separation into fractions: the liquid fraction is mixed with the initial effluents, and the solid is stored in piles.

The processing line for livestock waste consists of storage tank 1 for collecting initial waste from farm buildings, arc screens 2 for separating large optical and inorganic inclusions, conveyor 3 for removing large inclusions in shoulder 4 or trailer, settling tanks 5 for gravitational sedimentation of fine organic inclusions methane tank 6 for fermenting the thick fraction of the effluent, deammonizer 7 for removing ammonia, phosphorus, nitrates from the effluent, tank 8 for ammonia production odes, settler 9 for oxidation of effluents with oxygen in the air

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by blower 10, mixing the liquid phase with the fermented and settling sludge, a compressor or a gas blower 11 to supply biogas to the flotation cell, a heat exchanger 12 providing for recovering the energy of the fermented thick phase, centrifuges or press filters 13 separating the solid fraction for further storage in burtah 14, gas tank 15 for lung accumulation and storage of biogas and its further utilization in steam boiler 16, electrode boiler 17 and ponds 18,

Technological line works as follows.

Livestock waste from the farm enters storage tank 1, from which source wastewater is pumped to drum or arc screens 2 to separate difficultly decomposed organic substances under anaerobic conditions. These substances are transported by the conveyor 3 to vehicles and to the collar 4, where they rot under aerobic conditions. The liquid part with suspended fine organic substances is settled in h con / conformable vertical sediments IJMK 5, after which the settled thick phase is subjected to anaerobic digestion e ntenka 6, and the liquid phase is pumped into the disinfectant 7. The floater is pressurized with a pressure sensor. biogas from the gas tank 15. As a result of the chemical interaction of carbon dioxide with the components of the liquid fraction, the content of nitrates, nutrients is reduced, and the ammonia gases released are dissolved in water tank 8 Oh, form ammonia water. Lifting up the foam with the solid organic particles raised up is extinguished and disinfected with steam at a temperature above 100 ° C. Exhaust biogas with a reduced content of carbon dioxide re-enters the gas tank 15.

The liquid phase, treated with biogas and steam, is sent to sump 9, where it is

is mixed with the fermented dense phase air from the blower 10. As a result of this intake, the liquid phase is further decontaminated and clarified due to mass transfer. The thick phase from the settling tank 5 is sent to a centrifuge or press filter 13, then the solid part enters the piles 14, and the liquid again goes to the settling tanks 5. Before fermentation, the thick phase passes through the heat exchanger 12, where it is heated by fermented mass In the meta tin, the constant temperature is maintained by electric boiler 17 6noias are burned in boiler 16 to form steam. The purified liquid phase of the effluent is discharged into ponds 18 for irrigating agricultural plants, using them as recycle oxen, for growing aquatic vegetation for other purposes.

The results of the comparison of the proposed method with the known are given in the table.

The application of the proposed method makes it possible to more efficiently clean and disinfect the liquid phase of livestock waste after separation without collecting them, significantly reducing operating costs,

Claims (1)

Invention Formula The method of processing livestock farms from Goko by fermentation with heating, protection, growth, mechanical separation into fractions differing from that. that in order to save energy on wastewater treatment, after settling, only the thick phase is fermented, and the liquid flotation by biogas and foam is quenched with steam under pressure under anaerobic conditions, after which the liquid phase is mixed with fermented thick air under pressure, settled and poured , and after settling, the thick fermented phase is subjected to mechanical separation into fractions, the liquid fraction is mixed with the initial effluents, and the solid fraction is stored in piles. Wu / 0ff Yuzme to &&, -OЈ0ga (S /