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Treatment method of ecological farming waste

A technology of ecological breeding and treatment method, which is applied in the field of ecological breeding waste treatment, and can solve the problems of low methane production efficiency, refractory degradation, and limiting the development of energy-based treatment technology.

Active Publication Date: 2021-05-11
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned energy treatment still faces many problems: the start-up of the fermentation system is slow; the treatment cycle is too long; the methane production efficiency is very low; the high content of lignocellulose in the feces of vegetarian animals such as cattle, sheep and geese is difficult to degrade , resulting in waste of biomass energy and low conversion rate of raw materials
These problems seriously limit the further development of energy processing technology.

Method used

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  • Treatment method of ecological farming waste

Examples

Experimental program
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Effect test

Embodiment 1

[0060] The processing method of ecological breeding waste specifically comprises the following steps:

[0061] (1) Solid-liquid separation: After the breeding waste of the ecological breeding beef cattle farm is static for 4 hours, the waste is screened and separated into dry material and waste liquid, wherein the water content of the dry material is controlled at 55%;

[0062] (2) Preparation of starter: activate the strains of Bacillus subtilis, Streptomyces, Actinomyces, Aspergillus niger, Trichoderma reesei, Pseudomonas according to conventional methods, and then expand to the concentration of each thalline 5×10 9 -5×10 10 cfu / mL, then centrifuge and collect the thalli, mix each thalline according to the weight ratio of 2.5:1:2.5:1.5:3:1:2, and obtain the starter;

[0063] (3) Dry material fermentation: Mix the separated dry material with sludge and starter at a weight ratio of 5:2.5:1, adjust the pH of the fermentation system to 7.5, and perform anaerobic fermentation a...

Embodiment 2

[0068] The processing method of ecological breeding waste repeats the steps in embodiment 1, and the difference is only in:

[0069] When performing dry material fermentation and waste liquid fermentation in steps (3) and (4), the anaerobic fermentation is carried out under the action of an external low voltage, and the above external low voltage is specifically 0.9V;

[0070] Step (5) Composting starts from the 4th day when the temperature reaches above 55°C, reaches the highest temperature of 63.2°C for the first time on the 7th day, reaches the highest temperature of 57.8°C for the second time on the 18th day, and reaches the highest temperature of 46.4°C for the third time on the 23rd day °C, during which the temperature is above 55 °C for a total of 9 days, and the time for compost to fully decompose is 36 days.

Embodiment 3

[0072] The processing method of ecological breeding waste repeats the steps in embodiment 2, and the difference is only in:

[0073] Step (3) The dry matter used in the dry material fermentation process also includes the harmless products obtained after the above-mentioned dead farmed animals are subjected to pressurized hydrothermal treatment. The specific pressurized hydrothermal treatment steps are: crushing the dead farmed animals, Then place it in an environment with a temperature of 130°C and a pressure of 400KPa for 60 minutes to obtain a harmless product, and the weight ratio of the above harmless product in the dry matter is 25%;

[0074] Step (5) Composting starts at 55°C on the 4th day, reaches the highest temperature of 62.8°C for the first time on the 6th day, reaches the highest temperature of 57.1°C for the second time on the 17th day, and reaches the highest temperature of 44.5°C for the third time on the 24th day °C, during which the temperature is above 55 °C...

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Abstract

The invention provides a treatment method for ecological breeding waste, which belongs to the technical field of organic waste resource recycling, including: a solid-liquid separation process for separating waste material to obtain dry material and waste liquid; performing anaerobic fermentation on the dry material and waste liquid respectively, and Fermentation process for obtaining biogas, biogas residue and sticky matter; composting treatment process for decomposing biogas residue and sticky matter. Anaerobic fermentation carried out under the action of an external low voltage, the external low voltage is 0.7-1.0V. The treatment method of the present invention can shorten the fermentation cycle, increase the final gas production per unit of waste; increase the secretion and activity of cellulase in composting fermentation, prolong the high-temperature duration of compost fermentation, shorten the decomposing time, and increase the total humus content in the product; The effective resource utilization rate of waste is improved, and the goals of energy conservation and environmental protection, waste resource utilization, and biomass energy reuse are achieved.

Description

technical field [0001] The invention belongs to the technical field of resource recycling of organic waste, and in particular relates to a treatment method for ecological breeding waste. Background technique [0002] At present, the development of ecological breeding is becoming more and more vigorous, and the breeding industry is gradually optimized and developed to a large scale. At the same time, it also brings certain environmental pollution problems. The waste discharge of ecological farms is gradually increasing. According to relevant surveys, the discharge of livestock and poultry manure in 2018 is about 2.8 billion tons, which is 2.24 times the amount of industrial solid waste. The loss rate of manure discharge into the water body is about 30%, seriously polluting water quality. [0003] Ecological breeding waste includes green feed, compound feed, manure, waste water, etc., which contain a large amount of organic matter, nitrogen, phosphorus and other nutrients, as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C12N1/20C12N1/14C05G3/00C05F17/20C05F17/40C12R1/125C12R1/465C12R1/01C12R1/685C12R1/885C12R1/38
CPCC05D9/00C05G3/00C12N1/14C12N1/20C12P5/023Y02E50/30Y02W30/40
Inventor 蒋日进陈峰王好学于春梅
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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