Composting material composition and composting method

A composting method and composting technology, applied in the field of composting treatment, can solve the problems of high parameter stability control requirements, cumbersome operation steps, unfavorable promotion and application, etc., achieve stable degradation effect, good composting effect, and improve practicability

Active Publication Date: 2013-02-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation steps are cumbersome, the pH needs to be adjusted, and the control requirements for the stability of its parameters are high, which is not conducive to practical popularization and application, so this technology is also subject to certain restrictions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Water hyacinth, food waste are air-dried and broken into 15-30mm, fully mixed by sludge: water hyacinth (air-dried): food waste=7: 6: 8 mass ratio proportioning, mixture moisture content is 53.7%, C / The N ratio is 27:1. Put the mixed stock into the sealed bin to start a fermentation for 10 hours, then start intermittent ventilation, 20 minutes per hour, and the air flow rate is 0.08~0.15m 3 / min·m 3 , after 12 days, the composting in the fermentation bin was changed to open-air stacking, and proper ventilation was maintained, and the compost was turned once a day, and decomposed compost was obtained after 19 days of open-air stacking. The detection found that the compost organic matter was 44.2%, TN was 1.29%, TP was 0.63%, and TK was 3.52%.

Embodiment 2

[0027] Water hyacinth, food waste are air-dried and broken into 15-30mm, fully mixed by sludge: water hyacinth (air-dried): food waste=7: 6: 8 mass ratio proportioning, mixture moisture content is 53.7%, C / The N ratio is 27:1. Put the mixed stock into the sealed bin to start a fermentation for 12 hours, and then start intermittent ventilation for 15 minutes per hour, and the air flow rate is 0.04~0.08m 3 / min·m 3 , after 11 days, the composting in the fermentation bin was changed to open-air stacking, and proper ventilation was maintained, and the compost was turned once a day, and decomposed compost was obtained after 18 days of open-air stacking. The detection found that the compost organic matter was 43.3%, TN was 1.32%, TP was 0.63%, and TK was 3.67%.

Embodiment 3

[0029] Water hyacinth, food waste are air-dried and broken into 15-30mm, fully mixed by sludge: water hyacinth (air-dried): food waste=7: 4: 3 mass ratio proportioning, the mixture moisture content is 52%, C / The N ratio is 23:1, put the mixed stock into the sealed bin to start a fermentation for 12 hours, and then start intermittent ventilation, ventilation for 20 minutes per hour, and the air flow rate is 0.04~0.08m 3 / min·m 3 , after 11 days, the composting in the fermentation bin was changed to open-air stacking, and proper ventilation was maintained, and the compost was turned once a day, and decomposed compost was obtained after 18 days of open-air stacking. The detection found that the compost organic matter was 44.2%, TN was 1.49%, TP was 0.53%, and TK was 3.07%.

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Abstract

The invention discloses a composting material composition, which comprises city domestic sludge, water hyacinth and food waste, and the weight proportion of city domestic sludge to water hyacinth to food waste is 3-7:2-6:2-8, wherein the water content of the composition is controlled to be 50%-55%, and the ratio of C to N is 23:1-30:1. The composting method comprises the following steps: after composting raw materials are hermetically fermented, fermenting the composting raw materials by forced ventilation, and fermenting the composting raw materials by natural ventilation. The composting method provided by the invention has high organic matter degradation rate which is higher than 40%; the pH value does not need to be regulated; and various condition parameters are stable controllable factors, thereby further improving the practicability, the controllability and the stability of the method of the invention. The invention has wide application prospects.

Description

technical field [0001] The technology relates to the field of composting treatment, in particular to an aerobic composting technology using water hyacinth, urban domestic sludge and kitchen waste as composting materials. Background technique [0002] Compost is a kind of organic fertilizer made by using animal and plant remains and excrement containing fertilizer components, plus soil and minerals to be mixed and piled up, fermented and decomposed, and microbially decomposed under high temperature and high humidity conditions. The fertilizers that the Chinese have used in farmland for thousands of years are mainly composting manure and animal excrement and plant stems and leaves. The composting process is turned every three or four weeks, and it takes about three months. [0003] With the development of composting technology, it is more and more inclined to fully "turn waste into treasure" to solve the environmental problems caused by waste products. Using various wastes r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F15/00C05F17/00C05F7/00C05F9/00
CPCY02A40/20Y02W30/40
Inventor 张淑娟林亲铁江纪修林卓玲孟小春范瑞张旭兰黄耀棠谢子钊
Owner SUN YAT SEN UNIV
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