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Amendment and uses of the same in sludge composting

A conditioning agent and sludge technology, applied in the field of conditioning agents, can solve the problems of large dosage of conditioning agents, easy decomposition, low mass transfer efficiency, etc., to shorten the fermentation cycle, reduce fermentation energy consumption, and improve mass transfer efficiency. Effect

Inactive Publication Date: 2009-02-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a conditioner and its application in sludge in order to solve the problems of existing conditioner with large dosage, easy to decompose itself, low mass transfer efficiency, difficult to recycle and prone to anaerobic acidification. Applications in Composting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0009] Specific embodiment 1: The conditioning agent in this embodiment is pumice with a particle size of 0.2-10 cm.

[0010] In the present embodiment, the pumice stones are various existing pumice stones.

specific Embodiment approach 2

[0011] Specific embodiment two: the application of the conditioner in sludge composting in this embodiment is as follows: 1. Mix the sludge with the conditioner in a mass ratio of 1:0.3 to 4 to obtain a mixed material; 2. Put the mixed material into the fermentation equipment For fermentation, the stacking height of the mixed material is 0.8-2.5m, and the ventilation rate is 0.05-2m 3 / min·m 3 , when the temperature of the mixed material is higher than 65°C, adjust the ventilation rate to 0.05-8m 3 / min·m 3 , maintain the temperature of the mixed material at 50-65°C for at least 5 days, of which the temperature is 55-65°C for at least 3 days; 3. After 10-20 days of fermentation, the material is discharged, and then the conditioner is screened out to complete the conditioner Application in sludge composting; wherein the moisture content of the sludge in the first step is 65% to 85%, and the organic matter content is 35% to 80%.

[0012] In this embodiment, if static fermenta...

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment is different from Embodiment 2 in that the moisture content of the sludge in step 1 is 72%, and the organic matter content is 50%. Other steps and parameters are the same as in the second embodiment.

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PUM

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Abstract

The invention relates to a conditioner and the application in sludge composting thereof, relating to a conditioner and the application thereof. The invention solves the problems that the existing conditioner is large in dosing quantity, easy to be decomposed, low in mass transfer efficiency, difficult to be recycled and easy to have anaerobic acidification. The conditioner is pumice with the grain diameter of 0.2 cm to 10 cm. The conditioner has the following applications: firstly, the conditioner is mixed with sludge so as to obtain a mixing material; secondly, the mixing material is put in a fermentation apparatus to carry out fermentation; thirdly, material is discharged after fermentation, then the conditioners is sieved out, namely, the application of the conditioner in sludge composting is finished. The dosing quantity of the conditioner is decreased by 30 percent, and the space structure thereof is stable, and the conditioner is not easy to be decomposed, high in mass transfer efficiency, able to be recycled and not easy to have anaerobic acidification.

Description

technical field [0001] The present invention relates to a conditioner and its application. Background technique [0002] A large amount of sludge produced in the process of sewage treatment has high organic matter content, high water content, long degradation cycle, easy corruption, strong odor, easy to pollute ground water, breed mosquitoes, and become solid waste that affects the environment. Reasonable treatment must be given. final disposal. Sludge disposal methods include incineration, sanitary landfill, composting, etc. Among them, aerobic composting has attracted increasing attention because it can simultaneously realize sludge reduction, stabilization, harmlessness, and resource utilization. [0003] At present, after dehydration in sewage treatment plants, the sludge has high moisture content and low porosity. It is easy to compact and stick during aerobic composting, which seriously affects the mass transfer of oxygen. Therefore, it is necessary to add a large amo...

Claims

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Application Information

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IPC IPC(8): C05F17/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 李伟光王科王璐璐邹锦林王广智
Owner HARBIN INST OF TECH
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