Sludge compost thermophilic microbial agent and application

A microbial agent and sludge technology, applied in the field of waste resource utilization, to reduce environmental hazards, improve compost maturity, and promote the aerobic composting process of biochemical sludge

Inactive Publication Date: 2016-08-03
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Wang Biao and others pointed out in the experimental study of high-temperature aerobic composting of sludge that the phenomenon of a large increase in the content of nitrate ions at the end of composting can be considered as a sign of compost maturity, but the specific quantitative indicators still need further research

Method used

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  • Sludge compost thermophilic microbial agent and application
  • Sludge compost thermophilic microbial agent and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A thermophagic microbial agent for sludge composting, which is composed of various thermophilic bacteria, specifically: Bacillus alcalophilus (Bacillus alcalophilus) 2~8×10 10 cfu / g, Thermophilic Lactobacillus (ThermophilicLactobacillus) 3~6×10 10 cfu / g, Bacillus subtilis (Bacillus subtilis) 4~6×10 11 cfu / g, Thermophilic bacteriaLian 2~6×10 11 cfu / g, all strains are existing strains.

[0027] Preparation of microbial liquid bacterial agent: culture the above-mentioned several thermophilic bacteria in the medium respectively, and when the concentration range of the bacterial agent is cultivated, take various bacteria and mix them according to the volume ratio of 1:1 to make the bacterial liquid.

[0028] The prepared compost microbial preparation has the following performance indicators:

[0029] 1) Product appearance and shelf life: The product is a colorless turbid liquid with no odor, stored in a cool (below 20°C) dry place, and the validity period is 1 year.

[0...

Embodiment 3

[0041] Taking the same material without adding the microbial agent of Example 1 as a control (blank), the method of Example 2 was used for composting, and the organic carbon and temperature changes of the materials were compared during the composting process.

[0042] For compost temperature change results, see figure 1 ,Depend on figure 1 It can be seen that the temperature of the pile body presents a trend of rising first and then falling, and the temperature range is between 29-66°C. The initial temperature of the two groups of piles was around 29°C, and rose rapidly to 33°C on the first day, and continued to rise, and both barrels reached the highest temperature around the seventh day. Depend on figure 1 It can be seen that the highest temperature of the heap added with the screened thermophilic microbial agent can reach 66°C, while the highest temperature of the blank control heap is only about 61°C. And the duration of the high temperature period (>45°C) of the heap w...

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Abstract

The invention discloses a sludge compost thermophilic microbial agent and application thereof. The sludge compost thermophilic microbial agent comprises 2 to 8*10<10> cfu / g of Bacillus alcalophilus, 3 to 6*10<10> cfu / g of Thermophilic Lactobacillus, 4 to 6*10<11> cfu / g of Bacillus subtilis and 2 to 6*10<11> cfu / g of Thermophilic bacteria Lian. The sludge compost thermophilic microbial agent disclosed by the invention has the functions of promoting the biochemical sludge aerobic composting process, prolonging the compost high temperature period, and enhancing the compost maturity, so as to be capable of accelerating the biodegradation of organic matters in raw materials. The sludge compost thermophilic microbial agent can be used in compost enterprises for composting biochemical sludge of municipal sewage plants to produce bioorganic fertilizers and further reduce environmental hazards caused by the sludge.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of waste, and relates to a rapid composting bacterial agent for biochemical sludge in a domestic sewage plant and a method for producing organic fertilizer, in particular to a thermophagic microbial bacterial agent for sludge composting and its application. Background technique [0002] The biological sludge produced by my country's urban sewage plants has a large output and complex components. The amount of sludge produced by sewage treatment plants accounts for about 0.3%-0.5% of the volume of treated sewage, and there are often many sewage treatment plants that are heavy on water and light on mud, which leads to my country's The situation of urban sludge pollution is not optimistic. With the rapid economic development and the improvement of people's living standards, the standards for sewage discharge are becoming increasingly stringent, which will lead to further growth of urban slu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C05F15/00C12R1/07C12R1/225C12R1/125C12R1/46
CPCC12N1/20C05F7/00C05F11/00C05F11/08
Inventor 乔维川耿明明施艺陶骏奇夏昊
Owner NANJING FORESTRY UNIV
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