Method for generating biogas by fermenting pig excrement of pig farm and plants

A plant fermentation and pig manure technology, applied in fermentation, waste fuel, biological sludge treatment, etc., can solve the problems of long and uncontrollable process, and achieve the goal of improving the utilization rate of raw materials, rapid processing, and improving the efficiency of biogas production Effect

Inactive Publication Date: 2018-11-23
凤台县正祥农业科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the increasingly serious environmental pollution, straw in agricultural production is also on the list of prohibited burning. Many places have introduced policies to impose heavy fines on people who burn straw, which makes a large amount of straw discarded in farmland to make it degrade naturally. This process is long and uncontrollable; in the agricultural breeding industry, the pig manure produced by pig farms is also a thorny pain that is difficult to deal with. Most of them can still obtain biogas through slow fermentation and degradation to supply power generation or gas, but it is still uncontrollable. , which requires detailed research on plant straw and pig manure to find the fastest and most efficient way to generate biogas so that pig manure and plant straw interact

Method used

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  • Method for generating biogas by fermenting pig excrement of pig farm and plants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for generating biogas by fermenting pig manure and plants in a pig farm, comprising the following steps:

[0025] Step S1, crush fresh sweet potato stalks to 0.6 cm, place the crushed sweet potato stalks in an airtight container, add catalyst A accounting for 10% of the dry weight of the crushed plant stalks and mix evenly, pretreat at a temperature of 40°C for 5 hours; then add Catalyst B which accounts for 10% of the dry weight of the crushed plant stalks and mix evenly, at a temperature of 45°C, use semi-closed pre-degradation for 5 days, after solid-liquid separation, to obtain the pretreated white sweet potato stalks, fresh The water content of the white sweet potato stalk is 67% by mass percentage,

[0026] Described catalyst A is the mixed solution of sodium dodecylsulfonate, sodium edetate, sodium chloride and hydrogen peroxide, and the concentration of sodium dodecylsulfonate in catalyst A is 0.8wt%, and B The concentration of sodium diamine tetraacet...

Embodiment 2

[0034] The method for generating biogas by fermenting pig manure from a pig farm with plants described in Example 1, the difference is that:

[0035] In step S1, take the naturally dried sweet potato stalks and crush them to 0.6 cm. After natural drying, the water content of the white sweet potato stalks is 17% by mass. The crushed white sweet potato stalks are placed in an airtight container, and added Catalyst A with 8% of the dry weight of the crushed plant stalks was mixed evenly, and pretreated at a temperature of 40° C. for 10 hours; Closed pre-degradation for 10 days, and solid-liquid separation to obtain pretreated sweet potato stalks.

[0036] The biogas production and other indicators were measured every day. After 20 days of anaerobic fermentation, the total production in this example was 80400 mL, the gas production was 9.9 mL / g*day, and the methane content was 57%.

Embodiment 3

[0038] The method for generating biogas by fermenting pig manure from a pig farm with plants described in Example 1, the difference is that:

[0039] In step S1, crush fresh sweet potato stalks to 0.7 cm, the concentration of sodium dodecylsulfonate in catalyst A is 0.8 wt%, the concentration of sodium edetate is 0.5 wt%, and the concentration of hydrogen peroxide is 0.8 wt%.

[0040] The concentration of magnesium sulfate in catalyst B is 0.08wt%, the concentration of iron sulfate is 0.03wt%, and the concentration of lactic acid is 0.4wt%.

[0041] Step S2, taking 300 g of the pretreated white sweet potato stalks in step S1 and mixing them with 300 g of fresh pig manure, adding water and stirring evenly, adjusting the moisture content to 84%, and adjusting the C / N ratio to 28:1 to obtain a mixed solution;

[0042] Step S3, add 300g of activated sludge as an inoculum to the mixed solution in step S2, adjust the pH value to 7.8, place in a 10m3 fully mixed anaerobic reactor, a...

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Abstract

The invention discloses a method for generating biogas by fermenting pig excrement of a pig farm and plants. The method comprises the following steps: reasonably matching plant straws with a catalyst,and carrying out pre-treatment; then mixing the pre-treated plant straws and fresh pig excrement; adding water and uniformly stirring; adjusting the moisture content and adjusting the C/N ratio to obtain a mixed solution; then adding activated sludge into the mixed solution as an inoculant; after regulating the pH (Potential of Hydrogen) value, putting into an anaerobic reactor; carrying out anaerobic fermentation at middle temperature. According to the method disclosed by the invention, the problems that the pig excrement of the pig farm has a great amount and is difficult to treat, and thestraws are not allowed to be combusted are combined, the pig excrement and the straws are matched with the catalyst to obtain an optimal fermentation process, and the fermentation time is shortened, so that the pig excrement is rapidly treatment and accumulation is avoided.

Description

technical field [0001] The invention relates to the technical field of fermentation biogas generation, in particular to a method for generating biogas by fermenting pig manure and plants in a pig farm. Background technique [0002] With the increasingly serious environmental pollution, straw in agricultural production is also on the list of prohibited burning. Many places have introduced policies to impose heavy fines on people who burn straw, which makes a large amount of straw discarded in farmland to make it degrade naturally. This process is long and uncontrollable; in the agricultural breeding industry, the pig manure produced by pig farms is also a thorny pain that is difficult to deal with. Most of them can still obtain biogas through slow fermentation and degradation to supply power generation or gas, but it is still uncontrollable. , which requires detailed research on plant straw and pig manure to find the fastest and most efficient way to generate biogas so that p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C02F11/04
CPCC02F11/04C12P5/023Y02E50/30
Inventor 王杰
Owner 凤台县正祥农业科技发展有限公司
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