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Method for promoting anaerobic fermentation of needle mushroom feet for producing biogas by adopting activated carbon

An anaerobic fermentation and activated carbon technology, which is applied in fermentation, biological sludge treatment, waste fuel, etc., can solve the problems of poor anaerobic fermentation performance, low biogas production, and long time required to achieve improved gas production performance , favorable environmental resources and increased gas production rate

Inactive Publication Date: 2017-11-10
BIOGAS SCI RES INST MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the feet of Flammulina velutipes contain a large amount of organic matter, they can be used for anaerobic fermentation. However, there is no literature report on the use of leftovers such as Flammulina velutipes for anaerobic fermentation to produce biogas; on the other hand, livestock and poultry manure Or the gas production of biogas obtained by anaerobic fermentation of crop straw is not high, and the gas production rate is low, it takes a long time to reach the maximum gas production, and the anaerobic fermentation performance is poor

Method used

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  • Method for promoting anaerobic fermentation of needle mushroom feet for producing biogas by adopting activated carbon

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Effect test

Embodiment 1

[0021] (1) Preparation of fermentation raw materials:

[0022] Select fresh Flammulina velutipes from the market, and collect the mushroom feet of Flammulina velutipes as raw materials for anaerobic fermentation. The fermentation inoculum was obtained from the activated sludge in the anaerobic section of a sewage treatment plant in Chengdu. The additive activated carbon was purchased from the market.

[0023] Total solids content is 9.81% (be after fresh Flammulina velutipes is dried at 105 DEG C) in the foot of Flammulina velutipes, and total volatile organic matter VS content is 7.71%; Total dry matter content is 2.7% in the inoculum activated sludge, The total volatile organic compound VS content was 1.1%.

[0024] (2) Anaerobic fermentation treatment:

[0025] (1) After adopting pulverizer to pulverize the mushroom feet of Flammulina velutipes, add the sodium hydroxide solution of mass concentration 1% wherein, the liquid-solid ratio of described sodium hydroxide soluti...

Embodiment 2

[0028] (1) Fermentation raw material selects the raw material among the embodiment 1.

[0029] (2) Anaerobic fermentation treatment:

[0030] (1) After adopting pulverizer to pulverize the feet of Flammulina velutipes, add the sodium hydroxide solution of mass concentration 1% wherein, the liquid-solid ratio of described sodium hydroxide solution and the mushroom feet of Flammulina velutipes is 30:1mL / g, then in natural Carry out stack retting 5 days under the condition;

[0031] (2) After stacking and retting is completed, add gac to step (1) gain, and described gac is cell culture grade gac, and its serial number is: C118577, and the mass ratio of gac and Flammulina velutipes mushroom foot is 1:10; After fully mixing, add activated sludge to it, and use a batch anaerobic fermentation device for anaerobic fermentation to produce biogas; the mass ratio of activated sludge to Flammulina velutipes is 3:1, and the concentration of activated carbon is 20g / L. The total solid cont...

Embodiment 3

[0033] (1) Fermentation raw material selects the raw material among the embodiment 1.

[0034] (2) Anaerobic fermentation treatment:

[0035] (1) After adopting pulverizer to pulverize the feet of Flammulina velutipes, add the sodium hydroxide solution of mass concentration 1% wherein, the liquid-solid ratio of described sodium hydroxide solution and the mushroom feet of Flammulina velutipes is 20:1mL / g, then in nature Carry out stack retting 4 days under the condition;

[0036] (2) After stacking and retting is completed, add gac to step (1) gain, and described gac is cell culture grade gac, and its serial number is: C118577, and the mass ratio of gac and Flammulina velutipes mushroom foot is 1:8; After fully mixing, add activated sludge to it, and use a batch anaerobic fermentation device for anaerobic fermentation to produce biogas; the mass ratio of activated sludge to Flammulina velutipes is 3:1, and the concentration of activated carbon is 18g / L. The total solid conten...

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Abstract

The invention provides a method for promoting anaerobic fermentation of needle mushroom feet for producing biogas by adopting activated carbon. The method comprises the following steps: (1) taking the waste feet of fresh needle mushroom, grinding the waste feet, adding 1% of sodium hydroxide into the grinded mushroom feet, and then carrying out composting; and (2) after composting is completed, adding activated carbon into the product obtained in step (1), wherein the mass ratio of activated carbon to the needle mushroom feet is 1: (5-10), after sufficient mixing, adding an inoculum into the mixture, carrying out anaerobic fermentation for producing biogas, wherein the temperature of anaerobic fermentation is 35-55 DEG C, the fermentation pH is 6.5-7.5, and the total solid content in the anaerobic fermentation liquid is 5-8 %. According to the method provided by the invention, anaerobic fermentation is carried out on the needle mushroom feet, the activated carbon additive is added into the fermented material, so that the gas production rate of the needle mushroom feet through anaerobic fermentation is greatly improved, the gas production peak is 10-13 days earlier than that obtained not adopting the additive, and the accumulated biogas yield of anaerobic fermentation is also greatly improved.

Description

technical field [0001] The invention belongs to the technical field of biogas production by anaerobic fermentation, and in particular relates to a method for promoting biogas production by anaerobic fermentation of Flammulina velutipes mushroom feet by adopting activated carbon. Background technique [0002] Flammulina velutipes stembase (FVS) is a waste material produced during the production of Flammulina velutipes. Because Flammulina velutipes is an important cultivated edible fungus variety in my country, the market demand is large, and the production scale is growing rapidly. At this stage, a large amount of leftovers such as mushroom legs have been produced. Except for a small part of these leftovers being used as feed, most of them are discarded, which not only causes waste of resources, but also easily causes environmental pollution. Since the feet of Flammulina velutipes are rich in organic substances such as protein and amino acids, the waste resources can be reus...

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 黎霞李强张云飞贺静
Owner BIOGAS SCI RES INST MIN OF AGRI
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