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Organic waste aerobic composting stink in-situ emission reduction method

A technology for organic waste and aerobic composting, which is applied in the field of odor pollution control and in-situ emission reduction of odorous gases from aerobic composting of organic wastes, can solve the problems of odor pollution of aerobic composting of organic wastes, etc. Reduced processing costs and operational management costs, the effect of a wide range of sources

Pending Publication Date: 2021-11-12
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of organic waste aerobic composting malodorous pollution, and to provide a method for in-situ emission reduction of organic waste aerobic composting malodorous gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 30kg of organic domestic waste from a village in Hangzhou, add 40kg of sawdust and 0.1kg of decomposed compost and mix evenly, adjust the initial moisture content of the pile to 60%, the carbon-to-nitrogen ratio to 25, and the ventilation rate to 0.5L·kg -1 DM·min -1 , using static forced ventilation for composting. During the period, GC-MS was used to continuously monitor the types and concentrations of malodorous gases produced during the composting process. The results showed that 15 kinds of malodorous gases were detected during the composting process, including nitrogen-containing malodorous gases (ammonia), sulfur-containing malodorous gases (hydrogen sulfide, Methyl mercaptan, methyl sulfide, ethanethiol and dimethyl disulfide), carbon-containing malodorous gases (benzene, toluene, xylene, ethylbenzene, pinene, acenaphthylene, limonene, ethanol and acetaldehyde). Among them, the highest release concentration of ammonia gas is 123.60mg m -3 , higher than it...

Embodiment 2

[0033] Take 30kg of organic domestic waste from a village in Hangzhou, add 40kg of rice husk and 0.5kg of decomposed compost and mix evenly, adjust the initial moisture content of the pile to 65%, the carbon-nitrogen ratio to 30, and the ventilation volume to 0.625L·kg -1 DM·min -1 , using static forced ventilation for composting. During the period, GC-MS was used to continuously monitor the types and concentrations of malodorous gases produced during the composting process. The results showed that 15 kinds of malodorous gases were detected during the composting process, including nitrogen-containing malodorous gases (ammonia), sulfur-containing malodorous gases (hydrogen sulfide, Methyl mercaptan, methyl sulfide, ethanethiol and dimethyl disulfide), carbon-containing malodorous gases (benzene, toluene, xylene, ethylbenzene, pinene, acenaphthylene, limonene, ethanol and acetaldehyde). Among them, the highest release concentration of ammonia gas is 117.30mg m -3 , higher than...

Embodiment 3

[0036] Take 30kg of organic domestic waste from a village in Hangzhou, add 40kg of straw and 1.0kg of decomposed compost and mix evenly, adjust the initial moisture content of the pile to 70%, the carbon-nitrogen ratio to 35, and the ventilation rate to 0.75L·kg -1 DM·min -1 , using static forced ventilation for composting. During the period, GC-MS was used to continuously monitor the types and concentrations of malodorous gases produced during the composting process. The results showed that 15 kinds of malodorous gases were detected during the composting process, including nitrogen-containing malodorous gases (ammonia), sulfur-containing malodorous gases (hydrogen sulfide, Methyl mercaptan, methyl sulfide, ethanethiol and dimethyl disulfide), carbon-containing malodorous gases (benzene, toluene, xylene, ethylbenzene, pinene, acenaphthylene, limonene, ethanol and acetaldehyde). Among them, the highest release concentration of ammonia gas is 109.23mg m -3 , higher than its ol...

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PUM

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Abstract

The invention discloses an in-situ emission reduction method for organic waste aerobic composting stink. The method comprises the following steps: mixing organic garbage and auxiliary materials into a mixed material, adding matured compost to obtain a compost material, and filling the compost material into a forced ventilation static composting reactor for composting; monitoring the concentration of volatile malodorous gases released in the composting process every day by adopting GC-MS (Gas Chromatography-Mass Spectrometer), and if the monitored concentration of various malodorous gases is lower than an olfaction concentration threshold value, recording process parameters as a next composting process basis; if the smell concentration is not lower than the smell concentration threshold value, changing the weight ratio of the organic garbage to the auxiliary materials, and / or adjusting the carbon-nitrogen ratio of the compost material, and / or changing the composting condition, and / or adding biomass charcoal into the mixed material, and / or adding a microbial deodorant into the mixed material in the next batch of composting operation. The method disclosed by the invention plays a regulating role in controlling the specific odor pollution of the garbage compost, and has a good effect on environment protection and sustainable development.

Description

technical field [0001] The invention relates to a method for controlling odor pollution, in particular to a method for in-situ emission reduction of odorous gas by aerobic composting of organic waste, and belongs to the field of odorous gas pollution treatment in solid waste resource treatment and utilization process. Background technique [0002] With the rapid development of the country's rural economy and the continuous improvement of residents' living standards, the rural population has been greatly reduced, but the amount of domestic waste in rural areas is still increasing day by day. , Once became the "invisible killer" of farmers' health. In recent years, the classification and reduction of rural domestic waste has been carried out in the way of promoting the whole township, and the classification of rural domestic waste is carried out, and corresponding to different classification results, transportation and treatment are carried out, and the use of mechanical rapid...

Claims

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Application Information

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IPC IPC(8): C05G3/80C05F17/80B01D53/84
CPCC05D9/00C05F17/80C05G3/80B01D53/84B01D2257/40B01D2257/30B01D2257/50C05F5/00C05F5/002C05F9/00C05F9/04C05F11/00Y02W30/40Y02A50/20
Inventor 丁颖熊骏生魏姣皎陈君晓赖余港张嘉仪徐贤雯吕娅朱维琴张杭君
Owner HANGZHOU NORMAL UNIVERSITY