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Non-auxiliary material sludge composting method

A composting method without auxiliary materials, applied in the direction of sewage/sludge fertilizer, organic fertilizer, fertilization device, etc., can solve the problem of large addition, achieve the effects of killing germs, simplifying the composting process, and saving composting costs

Active Publication Date: 2014-11-26
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a sludge composting method without auxiliary materials to solve the problem that the existing sludge composting technology needs to add a large amount of auxiliary materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Preparation of fermentation agent 1# for sludge composting: During the sludge composting process, when the sludge temperature is 10°C, take an appropriate amount of sludge and add normal saline, the weight-volume ratio of sludge to normal saline (g / ml ) at a ratio of 1:16, take the filtrate after shaking for 5 hours, place the filtrate in the nutrient medium, and cultivate it at 10°C for 63 hours to obtain the special fermentation agent 1# for sludge composting, the effective number of viable bacteria is 6.2×10 8 CFU / ml;

[0035] Preparation of fermentation agent 2# for sludge composting: During the sludge composting process, when the sludge temperature is 35°C, take an appropriate amount of sludge and add physiological saline, the weight-to-volume ratio of sludge to physiological saline (g / ml) is 1:20, take the filtrate after shaking for 4 hours, put the filtrate in the nutrient medium, and cultivate it at 35°C for 48 hours to obtain the special fermentation agent 2...

Embodiment 2

[0041] 1) The same method as in Example 1, cultured at 25°C, 40°C, 55°C, and 75°C respectively to obtain sludge composting fermentation agents 5#, 6#, 7#, and 8#;

[0042] 2) Sludge composting without auxiliary materials: The sludge is returned to the decomposed material to reduce the moisture content of the sludge to 55%, and the sludge is sent to the composting tank at different temperatures of 25°C, 40°C, 55°C, and 75°C Sections were respectively inoculated with special fermentation agents 5#, 6#, 7#, and 8# for sludge composting, mixed evenly, and the inoculum amount was 0.1-0.5wt% of the amount of sludge to be treated; The oxygen content in the composting process is maintained at 5%-15%. After a total of 18 days of composting, the decomposed compost is obtained, and the temperature of the compost above 55°C lasts for 6 days.

[0043] Sampling and detection of decomposed compost showed that the organic matter of decomposed compost was 31.8%, TN was 1.89%, TP was 2.15%, and...

Embodiment 3

[0045] 1) The same method as in Example 1, cultured at 35°C, 50°C, and 70°C respectively to obtain sludge composting fermentation agents 9#, 10#, and 11#;

[0046] 2) Sludge composting without auxiliary materials: the sludge is dehydrated to reduce the moisture content of the sludge to 45%, and the sludge is sent to the composting tank, and the sludge is inoculated at different temperature ranges of 35°C, 50°C, and 70°C Compost special starter 9#, 10#, 11#, mixed evenly, the inoculum amount is 0.1-0.5wt% of the treated sludge; the composting process is ventilated in the form of fan forced ventilation and mechanical turning assistance, so that the composting process The oxygen content in the compost is maintained at 5%-15%, and the decomposed compost is obtained after a total of 15 days of composting, in which the temperature of the compost above 55°C lasts for 6 days. Decomposed and composted products can also be further processed into different varieties according to mark...

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Abstract

The invention discloses a non-auxiliary material sludge composting method. The method provided by the invention is composed of the following steps: cultivating indigenous microorganisms which are extracted from compost sludge at different temperatures, obtaining a leavening agent special for sludge compost, inoculating the microorganisms into sludge at corresponding temperature sections for adapting microorganisms in the leavening agent to the environment of compost sludge in a short period of time, rapidly breeding the microorganisms, thereby rapidly starting the compost, and rapidly decomposing the compost body with stable quality of the compost product, and realizing non-auxiliary material sludge composting. The non-auxiliary material sludge composting method has the advantages of long continuous time of high temperature, and harmless treatment of the compost. The composting method does not need auxiliary materials and simplifies the composting technology, and saves the composting cost, and the composting production environment is cleaner.

Description

Technical field [0001] The present invention is a field of compost treatment technology, and specially involves a method of fertilizing the sludge -free sludge. Background technique [0002] The compost is the use of microorganisms such as bacteria, lines, fungi, and fungi widely existing in nature. It can control the microbiology process of organic substitutes that can biodegradable organic substances in solid waste to stable humus -like biochemical transformation.Under the conditions of oxygen content and pH, biochemical degradation occurs in organic matter, forming a substance like humus soil. [0003] Lucky is a product of sewage treatment. It is a complex non -average body composed of organic residual tablets, bacterial bacteria, inorganic particles, colloids, etc.Its main characteristics are high water content (up to 99%), high organic matter content, easy to corrupt hair odor, and thin particles, small proportion, and glue liquid. [0004] With the rapid development of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F17/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 张淑娟江纪修张旭兰谢子钊林亲铁黄柳祯冀建平杨伯杰
Owner SUN YAT SEN UNIV
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