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Operation method for organic solid waste aerobic compost deodorizing nitrogen keeping apparatus

A technology of aerobic composting and organic solids, which is applied in the field of solid waste disposal and recycling, and achieves the effects of simple operation, low operating cost and favorable absorption

Inactive Publication Date: 2013-11-06
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, biotrickling filtration is used for deodorization of compost, especially the deodorization method that combines compost control with biotrickling tower control has not been reported yet.

Method used

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  • Operation method for organic solid waste aerobic compost deodorizing nitrogen keeping apparatus
  • Operation method for organic solid waste aerobic compost deodorizing nitrogen keeping apparatus
  • Operation method for organic solid waste aerobic compost deodorizing nitrogen keeping apparatus

Examples

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Effect test

specific Embodiment 1

[0020] Specific embodiment one (the present invention):

[0021] Such as figure 1 As shown, in this example, cow dung and mushroom dregs are used as composting raw materials, and by adding nitrogen-containing materials and other auxiliary materials, the organic matter content of the initial composting mixed raw materials is adjusted to 50%-60%, C / N=25-30:1, water content The rate is 45% to 50%. The above-mentioned compost raw materials and auxiliary materials are mixed by a mixing mixer and then poured into a fermentation reaction channel. After aerobic fermentation, they are forced forward by a mechanical compost turner to reach the pulverizer; Screening machine, the products under the screen are stacked into static stacks for secondary fermentation, and the stacked materials are bagged after the secondary fermentation is completed. The bottom of the primary fermentation reaction channel is provided with an air extraction branch pipe, which is connected to the main air extr...

specific Embodiment 2

[0024] Specific embodiment two (comparative example):

[0025] Specific embodiment two differs from specific embodiment one in that: (1) a low-pressure high-volume centrifugal fan is connected in series in the pipeline between the outlet of the high-pressure centrifugal exhaust fan and the inlet at the bottom of the biological trickling filter tower, and the gas flow is changed from the original 900m 3 / h becomes 3500m 3 / h The corresponding gas residence time in the bio-trickling filter tower is changed from 36s to 9.2s; (2) The method of controlling the stockpiling temperature is different. Lower the temperature until the central temperature of the pile is lower than 45°C and stop running. Such as figure 2 Shown; (3) The waste liquid respray system is not activated. Others are the same as in the first embodiment.

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Abstract

The invention relates to a method for realizing deodorization and nitrogen-preservation of organic solid waste aerobic compost by using a deodorization and nitrogen-preservation device, in particular to the operating method of the deodorization and nitrogen-preservation device by coupling compost control with biological trickling filtration tower control. The operating method comprises the following specific steps: the center temperature of the compost in a single fermentation reaction channel is maintained at 55-65 DEG C by intermittent air extraction of a high-pressure centrifugal air exhauster; the high-pressure centrifugal air exhauster extracts the odor produced by the compost in the single fermentation reaction channel into an air inlet of the biological trickling filtration tower for degradation and purification by microbes on a packing layer; the pH value of biological trickling filtration tower spray liquor is maintained at 6.5-7.5; the biological trickling filtration tower spray liquor that is recycled for a plurality of times is mixed with percolate produced in the aerobic composting process, and added with saturated Ca(OH)2 solution for adjustment, and then the obtained mixture sprays a composting system. The operating method has the advantages of simple and practical operation, and good deodorization effect of the biological trickling filtration tower, is beneficial to compost maturity, helps effectively control ammonia and nitrogen volatilization, and also helps produce an organic-inorganic compound fertilizer with NH4NO3.CaCO3 which is easily absorbed by crops.

Description

technical field [0001] The invention belongs to the technical field of solid waste disposal and recycling, and in particular relates to a deodorizing and nitrogen-maintaining method for coupling aerobic composting control of organic solid waste with biological trickling filter tower control by using a deodorizing and nitrogen-maintaining device. Background technique [0002] With the rapid development of the economy and the continuous growth of the population, the annual discharge of solid waste in our country is increasing year by year. According to the animal husbandry development plan, it is estimated that by 2010 and 2020, the amount of livestock and poultry manure in my country will reach 2.5 billion tons and 4 billion tons respectively. How to dispose of these solid wastes to protect the environment is an important issue facing our country and the world. Composting technology is one of the effective methods for the harmless and resourceful treatment and disposal of or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F17/00C05F17/02
CPCY02W30/40
Inventor 汪群慧韩梅琳吴川福薛念涛孙晓红谢维民
Owner UNIV OF SCI & TECH BEIJING
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