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Method for rapid composting by combining sludge of different types

A sludge and composting technology is applied in the field of combined rapid composting using different types of sludge, which can solve the problems of complicated composting material processing, unfavorable rapid aerobic composting, increased processes and investment, etc. The effect of decomposing process and reducing the cost of composting

Inactive Publication Date: 2013-10-30
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing aerobic composting methods need to add conditioners such as straw and sawdust in order to control the appropriate carbon-nitrogen ratio, improve oxygen ventilation conditions, and adjust moisture. Some technologies even add some microbial flora to improve composting efficiency. Both increase additional processes and investment, complicating the pre-treatment of compost materials
In the actual composting process, pH has an important impact on the activity of microbial flora, but the existing methods do not propose to regulate pH, and important parameters such as oxygen concentration are only controlled by ventilation, lacking accurate control measures, It is not conducive to rapid aerobic composting, resulting in a longer composting cycle and affecting composting efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to the analysis results of the basic properties of the dewatered sludge of a certain urban sewage treatment plant, the dewatered sludge of a sewage plant of a beer company, and the furfural slag of a certain furfural plant, the two kinds of sludge were first spread

[0022] Let it dry naturally for 5 days, then take 2 tons of urban sewage treatment sludge and mix it evenly with 50 kg of furfural residue, take 1 ton of sewage sludge from a brewery and mix it with 25 kg of furfural residue The kind of sludge is turned over and mixed evenly to obtain the prepared sludge mixture material to be composted. The basic properties of the sludge mixture were analyzed as follows: water content 68%, pH 6.3; C / N 33:1, total nitrogen (N, on a dry basis) content of 4.5%, total phosphorus (P 2 o 5 , on a dry basis) content of 6.8%, total potassium (K 2O, on a dry basis) content is 3.5%. This sludge mixture material is packed in the fermenter, and 3 monitoring points are set...

Embodiment 2

[0024] According to the analysis results of the basic properties of the dewatered sludge of a certain urban sewage treatment plant, the dewatered sludge of a sewage plant of a beer company, and the furfural slag of a certain furfural plant, the two sludges were first flattened and dried naturally for 5 days, and then taken from urban sewage for treatment. 3 tons of sludge and 60 kg of furfural slag are turned over and mixed evenly, 1 ton of sewage sludge from a brewery is mixed with 25 kg of furfural slag, and then the two kinds of sludge added with furfural slag are turned over and mixed evenly to obtain a good blend Sludge mixture to be composted. The basic properties of the sludge mixture were analyzed as follows: water content 63%, pH 6.8; C / N 32:1, total nitrogen (N, on a dry basis) content of 4.2%, total phosphorus (P 2 o 5 , on a dry basis) content of 5.8%, total potassium (K 2 O, on a dry basis) content is 2.5%. This sludge mixture material is packed in the fermente...

Embodiment 3

[0026] According to the analysis results of the basic properties of the dewatered sludge of a certain urban sewage treatment plant, the dewatered sludge of a sewage plant of a beer company, and the furfural slag of a certain furfural plant, the two sludges were first flattened and dried naturally for 5 days, and then taken from urban sewage for treatment. 3.5 tons of sludge and 75 kg of furfural slag were turned over and mixed evenly, 1.5 tons of sewage sludge from a brewery was mixed with 30 kg of furfural slag, and then the two sludges added with furfural slag were turned over and mixed evenly to obtain a good blend Sludge mixture to be composted. The basic properties of the sludge mixture were analyzed as follows: water content 61%, pH 6.7; C / N 30:1, total nitrogen (N, on a dry basis) content 3.1%, total phosphorus (P 2 o 5 , on a dry basis) content of 5.2%, total potassium (K 2 O, on a dry basis) content is 2.2%. . This sludge mixture material is packed in the fermente...

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Abstract

The invention relates to a novel method for rapid composting by combining sludge of different types. The method is realized by three main steps, namely mixed blending, aerobic fermentation and discharging and storing. According to the method, the aerobic composting is realized by combining sludge from urban sewage treatment plants, sludge from wastewater treatment plants of beer enterprises and furfural residue discharged by furfural enterprises and particularly parameters of initial composting are adjusted by using the characteristics of different sludge and acidic furfural residue. The novel method has the advantages of reducing the ecological environment risk, increasing nutritive substances of composting products, reducing the cost of the composting, realizing rapid composting without adding extra microbe consortium and the like.

Description

technical field [0001] The present invention relates to a new method of combined aerobic composting using multiple sludges, in particular to a new method of aerobic composting using sludge from urban sewage treatment plants, sludge from wastewater treatment plants in beer enterprises and furfural slag discharged from furfural enterprises , especially the use of different sludge composition characteristics and acid furfural slag to adjust the initial composting parameters, and a new process for accurately regulating composting parameters. Background technique [0002] With the enhancement of environmental protection awareness of government departments at all levels and the public, the domestic sewage treatment rate continues to increase. At present, about 80% of cities and towns have built sewage treatment plants. Most of these sewage treatment plants use biological methods for sewage treatment. Biological methods Although the process is simple and the operating cost is low, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F17/00C05F15/00
CPCY02W30/40
Inventor 滕洪辉张轶任百祥徐占林石淑云
Owner JILIN NORMAL UNIV
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