Composting method capable of reducing nitrous oxide and ammonia gas emission

A technology of nitrous oxide and composting method, which is applied in excretion fertilizer, fertilizer made of biological waste, organic fertilizer, etc., can solve the problems of inability to reduce nitrogen element loss, complicated pre-treatment work, and many types of complex bacteria, etc., and achieve effective Conducive to large-scale use, conducive to the protection of the environment, the effect of simple operation

Active Publication Date: 2018-08-24
FUJIAN AGRI & FORESTRY UNIV
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AI Technical Summary

Problems solved by technology

[0004] At present, research on reducing nitrous oxide and ammonia emissions in the composting process at home and abroad mainly involves chemical additive methods, adsorption methods and microbial addition methods. CN105523804A discloses a compost preparation method for reducing greenhouse gas emissions. Under the action of superphosphate, the mixture of pig manure and corn stalks was used as compost raw material, and the mass loss of ammonia volatilization by adding 5% and 10% calcium superphosphate on the 70th day of composting was only reduced by 27.6% and 39.3%, while for N 2 O effect is not obvious, CN103073341A utilizes biomass charcoal to adsorb nitrous oxide, and its effect is general, and can not reduce the loss of nitrogen element in the product like this, and CN101973795A utilizes compost compound bacterial agent to carry out sludge aerobic composting, which discloses The ammonia volatilization of compost is reduced by 30-50%. Although there is a certain effect, there are many types of complex bacteria involved and the pre-treatment work is complicated. The compound bacterial agent of Bacillus is used to reduce the emission of ammonia gas during the composting process, and its ammonia emission has been reduced by 46.23-53.11%, followed by the adjustment of composting process parameters, such as aeration mode, turning frequency, mulching Film and composting methods to reduce greenhouse gas and ammonia emissions

Method used

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  • Composting method capable of reducing nitrous oxide and ammonia gas emission
  • Composting method capable of reducing nitrous oxide and ammonia gas emission
  • Composting method capable of reducing nitrous oxide and ammonia gas emission

Examples

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Embodiment 1

[0047] A composting method for reducing nitrous oxide and ammonia emissions, comprising the steps of:

[0048] 1) Mix chicken manure with a moisture content of 80% and rice husks with a moisture content of 10% in a mass ratio of 5:1, and the initial moisture content of the mixed material is about 65% at this time;

[0049] 2) Add 2%wt hyperthermophilic bacteria agent (containing 8×10 8 cfu / mL of Bacillusthermantarcticu), mixed evenly and put into the fermenter, the height of the compost is 2.5m, and the composting is completed by intermittent ventilation for 50 days. On the 13th day and the 26th day of the composting process, the compost was turned over. In addition, the specific operation of intermittent ventilation was: aeration once every 45 minutes, and the aeration time was 15 minutes.

[0050] Fermentation tank: The overall structure is brick-concrete structure, with 2 aeration pipe trenches arranged at the bottom, and two aeration pipes are respectively installed for a...

Embodiment 2

[0056]A composting method for reducing nitrous oxide and ammonia emissions, comprising the steps of:

[0057] 1) Mix cow dung with a moisture content of 70% and straw with a moisture content of 10% in a mass ratio of 6:1. At this time, the initial moisture content of the mixed material is about 56%;

[0058] 2) Add 5%wt hyperthermophilic bacteria agent (containing 9×10 8 cfu / mL of thermophilic Thermus), mixed evenly and put into the fermenter, the height of the compost is 2.5m, composting with intermittent ventilation for 50 days, and the composting ends. On the 13th day and the 26th day of the composting process, the compost was turned over. In addition, the specific operation of intermittent ventilation was: aeration once every 45 minutes, and the aeration time was 15 minutes.

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Abstract

The invention discloses a composting method capable of reducing nitrous oxide and ammonia gas emission. The method comprises the following steps that 1, organic solid waste is adopted as composting raw materials; 2, ultrahigh temperature composting is performed, wherein the ultrahigh temperature composting temperature reaches 80 DEG C or above. The method can effectively reduce the nitrous oxide and ammonia gas emission in the composting process, in particular to the nitrous oxide emission, environment protection is facilitated, and meanwhile the nitrogen content in the composting product canbe increased; the method is simple and easy to implement and low in processing cost, and capable of being used in large scale.

Description

technical field [0001] The invention relates to the field of organic solid waste treatment, in particular to a composting method for reducing nitrous oxide and ammonia emissions. Background technique [0002] my country is a big country that produces organic solid waste. According to the statistics of the National Environmental Statistical Annual Report of the Ministry of Environmental Protection, in 2015, my country’s organic solid waste generated a total of about 2.11 billion tons, of which about 1.04 billion tons were straw, and about 620 million tons were poultry manure. About 240 million tons of kitchen waste and about 210 million tons of forestry residues have caused serious environmental problems, such as occupying land, polluting soil and groundwater, spreading diseases, etc., which have brought huge pressure on my country's ecological environment. [0003] Composting can not only realize the rapid harmless and stable treatment of organic solid waste, but also produce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00C05F15/00
CPCC05F3/00C05F17/00C05F5/002C05F11/08C05F11/00Y02W30/40
Inventor 崔鹏廖汉鹏周顺桂赵倩陈志唐家桓李翔
Owner FUJIAN AGRI & FORESTRY UNIV
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