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Method for controlling ammonia gas volatilization of sludge composting

A technology for composting and sludge, applied in sewage/sludge fertilizers, fertilizers made from biological waste, organic fertilizers, etc., can solve the problems of reducing the quality and quality of composting products, environmental pollution, etc., and alleviate the odor of sludge composting. , the effect of reducing the amount of volatilization and increasing the effective utilization rate

Pending Publication Date: 2018-08-24
INST OF MICROBIOLOGY HEILONGJIANG ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ammonia volatilization in the process of sludge composting will account for 44% to 70% of total nitrogen. Ammonia volatilization will not only cause environmental pollution, but also reduce the quality and quality of its compost products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0010] Specific embodiment one: the method for this embodiment control sludge composting ammonia volatilization is carried out according to the following steps:

[0011] Mix the sludge with a humidity of 75% to 85% with fungus chaff and molasses, then compost and ferment and force ventilation, the ventilation rate is 0.25L / min·L, ferment for 48±2h, and the inoculation amount is 0.8% to 1.2%. Add Bacillus mojavensis P2 and continue to ferment for 18 to 20 days to complete composting and fermentation;

[0012] Wherein, the mass ratio of sludge to fungus chaff and molasses is 1:(0.25-0.35):(0.04-0.06).

[0013] In this embodiment, the composting fermentation enters the high-temperature period of composting after 48±2 hours. At this time, the internal temperature of the compost has exceeded 50°C. Bacillus mojavensis P2 has high temperature resistance and can withstand high temperatures of 65°C.

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the humidity of the fungus chaff is 15% to 25%. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the fungus chaff is the fungus chaff of Auricularia auricula. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates a method for controlling ammonia gas volatilization of sludge composting. The method comprises the following steps: mixing sludge with the humidity of 75 percent to 85 percent, fungus bran and molasses; then composting and fermenting, and forcedly ventilating; fermenting for 48+ / -2h and adding bacillus mojavensis P2 according to the bacterium inoculation amount of 0.8 percentto 1.2 percent; continually fermenting for 18 to 20 days to finish composting, maturation and fermentation. According to the method provided by the invention, the bacillus mojavensis P2 has an assimilation effect with ammonia and the volatilization amount of ammonia gas is reduced; the activity of glutamate dehydrogenase in compost is increased and the loss of nitrogen element in a sludge composting process can be effectively controlled; the effective utilization rate of the nitrogen element is increased. By adopting the method provided by the invention, the volatilization amount of the ammonia gas can be reduced, the problem of sludge composting odor is greatly alleviated and the quality of a composting product is remarkably improved.

Description

technical field [0001] The invention relates to a method for controlling ammonia volatilization in sludge composting. Background technique [0002] my country's sludge treatment and disposal technology started late, and the existing sewage plants have insufficient sludge treatment facilities and treatment technologies, and the situation of sludge treatment is very severe. Sludge composting is one of the mainstream technologies for sludge disposal, but it has not been completely solved for a long time due to the serious volatilization of ammonia gas, but the promotion and application of this process in some areas has been hindered. The ammonia volatilization in the sludge composting process will account for 44% to 70% of the total nitrogen. The ammonia volatilization will not only cause environmental pollution, but also reduce the quality and quality of its compost products. Contents of the invention [0003] In order to reduce the volatilization of ammonia in the composti...

Claims

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Application Information

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IPC IPC(8): C05F15/00C05F17/00
CPCC05F5/00C05F17/00C05F5/006C05F7/00C05F11/08Y02W30/40
Inventor 孟利强张淑梅宫海楠张先成胡基华陈镜宇李晶曹旭姜威刘宇帅
Owner INST OF MICROBIOLOGY HEILONGJIANG ACADEMY OF SCI
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