Method for achieving conversion of micromolecular carbon sources of sludge through optimizing straw conditioning manner

A carbon source conversion and small molecule technology, applied in the direction of fermentation, etc., can solve the problem of low carbon source conversion efficiency of excess sludge alone, corn straw resource utilization, etc., and achieve the effect of improving treatment efficiency

Active Publication Date: 2017-01-25
山西瑞成达生环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the current problems of low conversion efficiency of excess sludge as a single carbon source and resource utilization of corn stalks, and provides a method for converting excess sludge into small molecule carbon sources by optimizing the conditioning mode of corn stalks

Method used

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  • Method for achieving conversion of micromolecular carbon sources of sludge through optimizing straw conditioning manner
  • Method for achieving conversion of micromolecular carbon sources of sludge through optimizing straw conditioning manner

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specific Embodiment approach 1

[0016] Specific implementation mode 1: In this implementation mode, the method of straw conditioning and strengthening the carbon source conversion of excess sludge is specifically carried out according to the following steps:

[0017] 1. Settling the remaining sludge naturally at a temperature of 4 °C for 24 h to 30 h, then draining the supernatant to obtain a sludge sample;

[0018] 2. Dry the straw at a temperature of 70 °C to constant weight, then crush it into a powder with a particle size of 2 mm to 10 mm, and add NaOH solution with a concentration of 2% (w / w). The specific dosage It is: the solid-liquid ratio is 1:10, after the powder is treated in a water bath at 85°C for 1 hour, the mixed solution is subjected to solid-liquid separation to obtain straw pretreatment liquid samples and straw dry powder plus pretreatment liquid samples;

[0019] 3. Add the different forms of straw samples obtained in step 2 to the sludge samples obtained in step 1, mix them evenly and pu...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the settling time in step 1 is 25 h to 29 h. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment is different from Embodiment 1 to Embodiment 2 in that: the rotation speed of the air bath shaker in step 4 is 102 rpm / min-108 rpm / min. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for achieving conversion of micromolecular carbon sources of sludge through optimizing a straw conditioning manner. The method is used for solving the problems in independent anaerobic fermentation of surplus sludge that the efficiency of conversion of the carbon sources is low and straws are not utilized in a resource-converting manner. The method comprises the steps: (1) preparing sludge samples; (2) preparing straw samples (for example, corn stalks); (3) adding corn stalk samples; (4) completing the method for strengthening the conversion of the carbon sources of the sludge through optimizing the corn stalk conditioning manner. According to the method disclosed by the invention, the adopted straws are high in yield and rich in available carbon source and is used for carrying out conditioning on the surplus sludge as additional carbon sources, and the concentration of volatile acids during the digestion of the surplus sludge is obviously improved through increasing the carbon-nitrogen ratio of a surplus sludge system; through optimizing the straw conditioning manner, the conversion of the carbon sources (C2 and C3), particularly the conversion of C2 and C3 micromolecular carbon sources of the sludge can be achieved; a resource-converting way of think is provided for the disposal and utilization of the straws while the efficiency of resource-converting treatment of the surplus sludge is increased.

Description

technical field [0001] The invention relates to a method for optimizing the conditioning mode of corn stalks to realize the conversion of small molecule carbon sources (C2 and C3) of surplus sludge. Background technique [0002] In recent years, with the development of my country's economic construction, municipal sewage treatment facilities have been gradually improved, and a large amount of excess sludge has been produced while quickly and efficiently treating sewage. At present, excess sludge has become a very difficult problem in the process of sewage treatment. Compared with other treatment technologies, anaerobic digestion technology can realize the stabilization and reduction of sludge. At present, most of the researches focus on bioenergy as the final target product, the digestion cycle is relatively long, and the added value of the product is low. Therefore, many studies not only Focusing on the final bioenergy, it is also beginning to pay attention to the intermed...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C12P7/52C12P7/54
CPCC12P7/52C12P7/54
Inventor周爱娟张家广岳秀萍温凯丽汪素芳
Owner山西瑞成达生环科技有限公司