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Method for promoting anaerobic digestion by using carbonyl iron

An anaerobic digestion, carbonyl iron technology, applied in the direction of adding compounds to stimulate growth, climate change adaptation, biological organic part treatment, etc., can solve the problems of poor stability, normal pH value, accumulation, etc., to promote the induction of enzymes production, shorten the adaptation period, and accelerate the degradation effect

Active Publication Date: 2022-07-05
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI +2
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Problems solved by technology

However, the long-term operation of the anaerobic digestion system is prone to the accumulation of intermediate metabolites due to the mismatch between physical and chemical properties and microbial metabolic needs, which inhibits microbial life activities, which in turn leads to low efficiency and poor stability of the digestive system, which restricts the development of agricultural waste. efficient resource utilization
[0003] Due to its high nitrogen and perishable characteristics, chicken manure is one of the most likely to cause inhibition in the anaerobic digestion of livestock and poultry manure. It is easy to produce a large amount of fatty acid and ammonia nitrogen at the same time, and the neutralization effect of the two makes it difficult to diagnose and adjust the inhibition formed by conventional means such as pH value, resulting in often stagnant gas production but pH The phenomenon that the value is in the normal range

Method used

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  • Method for promoting anaerobic digestion by using carbonyl iron
  • Method for promoting anaerobic digestion by using carbonyl iron
  • Method for promoting anaerobic digestion by using carbonyl iron

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Embodiment 1

[0032] 1. Experimental materials

[0033] The substrate used for anaerobic digestion was chicken manure, collected from large-scale farms, and the total solids (TS) and volatile solids (VS) contents of the raw materials were 24% and 15%, respectively. The inoculum was taken from a continuous stirring anaerobic digestion reactor operating normally in the laboratory under mesophilic conditions (36±1°C), with a water content of 97%. Carbonyl iron powder was purchased from Beijing Ruidong Nianyuan Environmental Protection Technology Co., Ltd., and the particle size was 1-3 μm. Biochar is prepared from waste fruit trees by pyrolysis, the final temperature is 550°C, the residence time is 2h, and the particle size is 0.3-0.45mm.

[0034] 2. Experimental method

[0035] In four 500 mL sequencing batch anaerobic digestion reactors, chicken manure with a volatile solid mass of 10.362 g was added, 120 mL of inoculum was inoculated, and the volume was adjusted to 400 mL effective reacto...

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Abstract

The invention discloses a method for promoting anaerobic digestion by using carbonyl iron, and relates to the technical field of biological fermentation. The method comprises the following step: adding carbonyl iron into a fermentation material liquid to carry out anaerobic digestion. The carbonyl iron is applied to anaerobic digestion, the anaerobic digestion effect can be improved, and then the yield of methane is increased. On one hand, carbonyl iron can accelerate degradation of complex organic matters by promoting microbial iron respiration, and on the other hand, carbonyl iron can provide iron element supplement necessary for growth of microorganisms, and has a promoting effect on hydrolytic acidification bacteria and methanogens.

Description

technical field [0001] The invention relates to the technical field of biological fermentation, in particular to a method for promoting anaerobic digestion by utilizing iron carbonyl. Background technique [0002] Anaerobic digestion is the use of a variety of microorganisms to synergistically metabolize to obtain clean energy rich in methane and nutrient-rich biogas residues that can be used as fertilizers while processing agricultural waste, supplementing and balancing the energy and organic matter consumed in the production and living process the process of. However, the long-running anaerobic digestion system is prone to accumulation of intermediate metabolites due to the mismatch between the physical and chemical properties of materials and the metabolic needs of microorganisms, which inhibits the life activities of microorganisms, which in turn leads to low operating efficiency and poor stability of the digestive system, which restricts agricultural waste. efficient r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C12N1/38C02F11/04
CPCC12P5/023C12N1/38C02F11/04Y02W30/40Y02E50/30
Inventor 潘君廷马俊怡刘宏斌
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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