Cyclically degradable granulated conditioning agent and application of conditioning agent in sludge compost

A conditioner and granulation technology, which is applied in the field of recyclable degradable granulation conditioner, can solve the problems of affecting the quality of compost finished products, prolonging the sludge composting cycle, increasing the cost of sludge composting, etc., and achieving good microbial adhesion and fluidity Good, easy sifting effect

Active Publication Date: 2012-06-27
HENAN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problem that traditional organic conditioners are used in a large amount, difficult to recycle, increase the cost of sludge composting, and organic conditioners are slowly degraded in the later stage of composting, prolonging the period of sludge composting, and at the same time solve the problem that some inorganic conditioners remain in compost and reduce organic matter content , problems that affect the quality of compost products

Method used

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  • Cyclically degradable granulated conditioning agent and application of conditioning agent in sludge compost

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specific Embodiment approach 1

[0012] Embodiment 1: The recyclable degradable granulated conditioner in this embodiment is a homogeneous woody body with a particle size of 0.5-10 cm.

[0013] In this embodiment, the homogeneous wood body is a sphere or a cube with a particle size of 0.5-10 cm, which is processed by dry wood through crushers, molding machines and other mechanical equipment. The wood homogeneous body has the same particle size and shape, light weight, good fluidity, easy to sieve, recyclable, good water absorption, adjustable moisture, easy to attach microorganisms, recyclable inoculation, degradability, residue does not affect the finished product quality features.

specific Embodiment approach 2

[0014] Specific embodiment two: the application of the recyclable degradable granulation conditioner in this embodiment in sludge composting is as follows: (1) by mass ratio 1: (0.35~1.35) the sludge is mixed with the conditioner to obtain the mixed material, the mixture The moisture content of the material is 55-65%; (2) The mixed material is put into the fermentation facility for high-temperature aerobic fermentation, and the ventilation rate is 0.05-6m 3 / (min·m 3 ), maintaining the temperature of the mixed material at 55°C for at least 5 days; (3) discharging the material after 9 to 20 days of fermentation, and then sieving the conditioner through a drum sieve. Application in composting. Wherein the water content of the sludge in the step (1) is 75-85%, and the organic matter content is 40-85%.

[0015] In this embodiment, if the intermittent dynamic fermentation process is adopted, regular turning and mixing can be carried out, and the turning frequency is 1 to 4 days. ...

specific Embodiment approach 3

[0018] Embodiment 3: This embodiment is different from Embodiment 2 in that the moisture content of the sludge in step (1) is 80%, and the organic matter content is 60%. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention which belongs to the solid waste resource field relates to a cyclically degradable granulated conditioning agent and an application of the conditioning agent in sludge compost. Problems of large dosage, difficult recycle, sludge compost cost increase, slow late degradation and compost period prolongation of traditional organic conditioning agents are solved, and problems of the residual of an inorganic conditioning in the compost and finished product quality reduction are simultaneously solved. The cyclically degradable granulated conditioning agent of the invention is a wood homogeneous body with particle sizes of 0.5-10cm. The application comprises the following steps: 1, mixing sludge with the conditioning agent to obtain a mixture; 2, fermenting the mixture at a high temperature; and 3, discharging the obtained material after the fermentation, and screening out the conditioning agent, wherein the screening rate is greater tan 98%. The conditioning agent of the invention has the advantages of stable space structure, good fluidity, easy screening, recyclable use, good hydroscopicity, water adjustableness, good microbial adhesiveness, recyclable inoculation, and no influence of the finished product quality by the residual. The conditioning agent has very high popularization and application values.

Description

technical field [0001] The invention relates to a recyclable degradable granulated conditioner and its application in sludge composting. Background technique [0002] In recent years, with the acceleration of urbanization and the rapid development of social economy in China, the discharge of industrial and domestic sewage is increasing, which is directly or indirectly discharged into water bodies. The problem of water pollution is becoming more and more serious, which intensifies the water resource crisis. In order to alleviate the shortage of water resources and protect people's health, the state has invested a lot of manpower and financial resources in sewage treatment, and various cities in our country have successively built and operated sewage treatment plants. As of the end of 2010, more than 2,500 urban sewage treatment plants in my country have been built, with a sewage treatment capacity of 122 million cubic meters per day. Biological treatment is generally used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00
CPCY02W30/40
Inventor 刘永德赵继红张杰吴海露许春红谢玲玲
Owner HENAN UNIVERSITY OF TECHNOLOGY
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