SU1703029A1 - Method for processing animal feces into protein-vitamin feed, biogas and fertilizer - Google Patents

Abstract

This invention relates to technical microbiology, in particular, to a method of processing animal excrement to obtain protein-vitamin feed, biogas and fertilizer by enzymatic cultivation on anaerobic bacteria excrement. The aim of the invention is to intensify the process of methane fermentation, increase the yield of final products, reduce the time of the technological process and eliminate the ingress of the original microflora from excrement into the final product. The method is carried out in three stages with i 37-40 in the first stage. 40-45 & in the second and 54-56 & in the third, using sawdust as a sorbent for the accumulation of microorganisms. The isolated feed product from the fermented mass is coagulated, filtered and dried at t U5-120 ° C. This method allows to increase the content of crude protein from 9.4 to 33% in the received feed, reduce fiber from 39 to 10-16%, increase the biogas yield from 0.25 to 0.7 m3 / kg and increase the biomass yield by 3-4 times in relation to the prototype. 1 tab.

Description

The invention relates to technical microbiology, in particular to a method for the production of feedstuff, biogas and fertilizer from animal and poultry excreta, it is intended for use in livestock enterprises for the purpose of utilization and disposal of their waste.

The aim of the invention is to intensify the process of biodegradation of organic substances in the process of methane fermentation, to exclude microflora leakage from the initial substrate to the final product, to increase the nutritional value of the resulting feed product, to increase the yield of biogas and biomass, as well as to increase the value of residues of the discarded mass as fertilizer.

PRI me R. In a bioreactor with a working volume of 400 m, consisting of three stages with volumes of 50, 100 and 250 m3, which are vertical cylindrical tanks with a jacket for heating and agitators at the bottom. rotating at a speed of 2-4 rpm, and a peel turner rotating at a speed of 3-4 rpm filled with sawdust, 2/3 of the volume is fed with cattle excrement with a dry matter concentration of 5.8% in an amount of 86. Sludge is uniformly metered into the lower part of the first stage, which passes at a speed of about 0.4 m / s upwards, through a layer of sawdust with microorganisms, is subjected to biodegradation hydrolytic

ABOUT

oa

| 0

to

me

P

mmkrakanzm, such as ClostrkHum, Bacterloldes, Rumlnocauns,

Butyrivlbrio. Bacillus, passes through the sludge zone, is freed from suspended particles and flows into the lower part of the agora stage.

Stay substrate in the first stage of the reactor no more than one day. The temperature at steady state is maintained within the range of 37-40 ° C, the pH is set to 7-7.5.

The second stage of the bioreactor works in the same way as the first, with the difference that the acid-forming microflora is formed there: Syntrophbscter, Syntrophomonas, Desulfovibrlo. Duration; the residence time of the substrate is doubled, i.e., the reactor has a volume twice as large as the first stage reactor, at the same height. The temperature is maintained at 40-45PC, it is established independently, 5.

In the third stage, the substrate repeats

 a path similar to the first two, but in the presence of bacteria-forming bacteria:

Methanobacteilu-n formiclum, M. bryantir, M. thermoautotrofScum. fr ethanobrevibacter arborfphHus, M. rumlnam um. Methanothermus fervldus, Methanoconoldes methyl uterts, Methanomlcrobium mobile, MethanospiriKum huhgatel, f ethanogesUim carlaci. M. tubii. KlethatVcssircina barkeH. MethahotHrlxconc-lHi, t..3oehngen I, M. thermoucetopWIu. I The third stage reactor has a volume {more than five times than the first one, where the methane-formation stage occurs at a temperature of 54-56 ° C and pH 8-9. The spent substrate — methane barka is taken from the upper zone of the trotating stage of the biorgtor through Hydraztvor, collected in the collection, acidified with hydrochloric acid to. About, coagulated with a 10% -num chloride ferric solution in alumina alum. The biomass, consisting mainly of methane-suppressing bacteria, together with osteksadi of organic substances, rushes to the surface. Es is removed, the mesh is filtered through the SCS, with a mesh size of 0.5 mm and dried at 120 ° C to a residual moisture content of 8%. The resulting dry mass has c-pstza, wt%: crude protein 31.2, crude fat 3.3, raw fiber 11.8; content of Biadtam Bi2 43 mg / kr. Tests of the product showed the absence of pathogenic microflora and carcinogenic substances,

The results of studies on the choice of the optimum temperature of the phases of the broth 5 are given in the table.

Biogas is available in 3400 m3 / day; it is used in the chests-g of fuel.

The filtrate with a quantity of 5–84 m / day, Prvd-steypg; i-1c is a solution of biogenic elements: nitrogen, phosphorus, potassium, and others, as well as organic substances, used as fertilizer through field irrigation systems,

The obtained protein-vitamin feed as a 3-4% additive in the diet was tested when feeding chickens for 300 days, instead of fish meal, fodder yeast and barley. Received additional.

0 weight gain to 7.2%, at the same time reduced feed consumption by 7.5%. During tasting of meat and broth, the estimates above were compared to the control ones. Egg production increased by 6% and improved quality indicators of hen. The case and others are not noticed.

negative events.:. Thus, the use of the proposed method makes it possible to exclude a breakthrough into the final product of the initial microflora; shorten the duration of enzyme production from 20-25 to 3 -5 days. also, increase the content of crude protein from 9.4 to 33% and reduce fiber from 39 to 10-16%. Food contains significant amounts of vitamins.

5, the biogas output is increased from 0.25 to 0.7 m3 / kg and the biomass yield is increased by 3-4 times.

Production efficiency per unit of product increased by 3.5 times, capital expenditures for the construction of installations are reduced

0 4 times ...

Claims (1)

The results of studies on the choice of the optimum temperature of the phases of methane fermentation are shown in the following table. Invention Formula 5 A method of processing animal excrement to obtain protein-vitamin feed, biogas and fertilizer, by enzymatic cultivation on an excreta of anaerobic bacteria, which distinguishes with. In order to increase the yield of the final products, reduce the time of the technological process and eliminate ingress of the original microflora of the mz excrement into the final product, the processing is carried out in three stages, the first of which is carried out at t 37-40 ° C in the presence of a group of hydrolytic microorganisms with the introduction of sawdust as a sorbent, mix the substrate to the mode As the stationary layer of the sorbent hangs above the mixing zone, the processed substrate is separated from the sorbent by peeling, the second stage is carried out similarly to perary with the use of acid-absorbing 5 bacteria - at t "40-45 ° C, the third stage is carried out similarly to the porous and second using methane-forming microorganisms at t S4-56 ° C, followed by coagulation, filtration and drying of the feed product at t 115-120 ° C.