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Preparation method of starter for sludge compost

A fermentation agent and composting technology, which is applied in the preparation of organic fertilizers, methods based on microorganisms, sewage/sludge fertilizers, etc., can solve the problems of polluting the environment, taking a long time, and sludge is difficult to recycle, and achieves short fermentation cycles. The effect of reducing the concentration of odor and increasing the shelf life

Active Publication Date: 2011-09-28
石家庄金太阳生物有机肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two problems that must be solved in the process of composting. One is that it takes a long time to ferment naturally to become fully decomposed, and it also emits a foul smell, which pollutes the surrounding environment.
Second, some toxic and harmful heavy metals in sludge, such as cadmium (Cd) and lead (Pb), often exceed the standard, making it difficult to recycle sludge
The use of bacteria-fungus combination to promote sludge composting and resource utilization and its high-density, high-activity production process have not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method for a starter for sludge composting, comprising inoculating the production bacteria of the sludge composting starter in an aseptic medium containing a carbon source, a nitrogen source, inorganic salts and water to carry out aerobic fermentation; it is characterized in that Described preparation process comprises the steps:

[0036] A. Fermentation

[0037] a, shake flask seeds are made after the slant strains are respectively activated;

[0038] B, after mixing the quality of shake flask seeds in step a, make seed solution through expansion cultivation;

[0039] c. Insert the seed liquid prepared in step b into the sterilized fermentation medium according to the volume ratio=5% inoculum, and make a fermentation liquid through aerated fermentation;

[0040] B, the fermentation broth prepared in step c is adsorbed and immobilized on a carrier to make a starter;

[0041] Wherein the production strain selects Bacillus subtilis CGMCC1.1200 ( Bacillus...

Embodiment 2

[0059] A preparation method for a starter for sludge composting, comprising inoculating the production bacteria of the sludge composting starter in an aseptic medium containing a carbon source, a nitrogen source, inorganic salts and water to carry out aerobic fermentation; it is characterized in that Described preparation process comprises the steps:

[0060] A. Fermentation

[0061] a, shake flask seeds are made after the slant strains are respectively activated;

[0062] B, after mixing the quality of shake flask seeds in step a, make seed solution through expansion cultivation;

[0063] c. Insert the seed liquid prepared in step b into the sterilized fermentation medium according to the volume ratio=5%-10% inoculum, and make a fermentation liquid through aerated fermentation;

[0064] B, the fermentation broth prepared in step c is adsorbed and immobilized on a carrier to make a starter;

[0065] Wherein the production bacterial classification is selected with embodiment...

Embodiment 3

[0082] A preparation method for a starter for sludge composting, comprising inoculating the production bacteria of the sludge composting starter in an aseptic medium containing a carbon source, a nitrogen source, inorganic salts and water to carry out aerobic fermentation; it is characterized in that Described preparation process comprises the steps:

[0083] A. Fermentation

[0084] a, shake flask seeds are made after the slant strains are respectively activated;

[0085] B, after mixing the quality of shake flask seeds in step a, make seed solution through expansion cultivation;

[0086] c. Insert the seed liquid prepared in step b into the sterilized fermentation medium according to the volume ratio=8% inoculum, and make a fermentation liquid through aerated fermentation;

[0087] B, the fermentation broth prepared in step c is adsorbed and immobilized on a carrier to make a starter;

[0088] Wherein the production bacterial classification is selected with embodiment 1; ...

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Abstract

The invention belongs to microbial fermentation and particularly relates to a preparation method of a starter for sludge compost. The method comprises the following steps: activating production strains such as Bacillus subtilis to prepare shake flask seeds respectively, mixing the shake flask seeds according to equal weight proportion to prepare seed solution, inoculating the seed solution in sterilized fermentation culture medium to prepare fermentation solution through aerobic fermentation, and adsorbing and immobilizing the fermentation solution on carrier to prepare the starter. The method solves the problems of the prior art such as long composting time, poor surrounding environment and difficult resource recycling of sludge. The method has the advantages of short fermentation period, low cost, high equipment utilization rate, good deodorizing effect and the like.

Description

technical field [0001] The invention belongs to the fermentation of microorganisms, in particular to a preparation method of a starter for sludge composting. Background technique [0002] Today, with a large demand for organic fertilizers, it is a development trend to compost the sludge produced after the treatment of urban domestic sewage into organic fertilizers. However, there are two problems that must be solved in the process of composting. One is that it takes a long time for natural fermentation to become fully decomposed, and it also emits a foul smell, polluting the surrounding environment. Second, some toxic and harmful heavy metals in sludge, such as cadmium (Cd) and lead (Pb), often exceed the standard, making it difficult to recycle sludge. The use of bacteria-fungus combination to promote sludge composting and resource utilization and its high-density, high-activity production process have not been reported yet. Contents of the invention [0003] The object...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C12N1/16C12N1/14C05F17/00C05F7/00C12R1/125C12R1/10C12R1/01C12R1/685C12R1/74
CPCY02A40/20Y02W30/40
Inventor 张清敏刘志军李明陈亚肖刘少坤魏惠唐景春喻嫦娥
Owner 石家庄金太阳生物有机肥有限公司
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