Method for quick resource utilization of un-dewatered returned sludge of domestic sewage factory

A technology of domestic sewage and return sludge, which is applied in the field of rapid resource utilization of waste, can solve the problems of no sludge treatment process and secondary pollution, and achieve the effects of reducing emissions and saving land resources

Inactive Publication Date: 2010-03-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Numerous sewage treatment plants have played an important role in solving my country's water pollution problems, but the sludge produced in sewage treatment has brought new environmental problems
More than 70% of sewage treatment plants in my country do not have a complete sludge treatment process, and a large amount of sludge that has not been stabilized will cause serious secondary pollution to the environment

Method used

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  • Method for quick resource utilization of un-dewatered returned sludge of domestic sewage factory
  • Method for quick resource utilization of un-dewatered returned sludge of domestic sewage factory
  • Method for quick resource utilization of un-dewatered returned sludge of domestic sewage factory

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The non-dehydrated return sludge from the sewage plant is used as the substrate to cultivate philodendron philodendron. The implementation steps are as follows: pour the return sludge directly into a glass tank with a size of 40cm×30cm×30cm, use foam plastic as a floating bed, and rely on the floating bed to plant 3 plants of philodendron philodendron. Taro was planted in it, and at the same time, with ordinary potting soil as a control, three groups were set up and placed in a transparent glass room. During the experiment, the temperature in the room was controlled at 30°C during the day, no nutrients were added, and the sludge was not treated in any way. Observe Compare the gross weight and chlorophyll content of plants before and after planting, and evaluate the growth of plants. After philodendron philodendron grows up, 40 days later, transplant it into potting soil and put it on the market for sale, realizing the rapid resource utilization of sludge .

Embodiment 2

[0030] The non-dehydrated return sludge from the sewage plant is used as the substrate to cultivate philodendron philodendron. The implementation steps are as follows: pour the return sludge directly into a glass tank with a size of 40cm×30cm×30cm, use foam plastic as a floating bed, and rely on the floating bed to plant 3 plants of philodendron philodendron. Taro was planted in it, and at the same time, with ordinary potting soil as a control, three groups were set up and placed in a transparent glass room. During the experiment, the temperature in the room was controlled at 35°C during the day, no nutrients were added, and the sludge was not treated in any way. Observe Compare the gross weight and chlorophyll content of plants before and after planting, and evaluate the growth of plants. After philodendron philodendron grows up, 45 days later, transplant it into potting soil and put it on the market for sale, realizing the rapid resource utilization of sludge .

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Abstract

The invention belongs to the field of quick resource utilization of waste, and particularly relates to a method for resource utilization of returned sludge of a domestic sewage factory. The method comprises the following steps of: pouring the un-dewatered returned sludge of the sewage factory into a glass container with certain size; taking foamed plastic as a floating bed; and planting ornamentalplants in the floating bed to compare with plants in ordinary potting soil. The day experiment temperature is controlled between 30 and 35 DEC C. The method does not add nutrition elements or carriesout treatment to the sludge. That the un-dewatered returned sludge of the sewage factory is suitable for the growth of the ornamental plants such as philodendron selloum is determined through observation. Compared with a matched group, the plants have obviously better fresh weight and chlorophyll than those of the matched group. The method uses the returned sludge of the domestic sewage factory to directly culture the philodendron selloum, can quickly achieve the aims of turning waste into valuable and harmful into beneficial, can reduce the emission of residual sludge and can save precious land resources.

Description

technical field [0001] The invention belongs to the field of rapid resource utilization of waste, in particular to a method for resource utilization of return sludge from domestic sewage plants. Background technique [0002] According to reports, due to the rapid expansion of the number and scale of cities, 61.5% of the 660 cities in my country still lack sewage treatment plants, and a large amount of domestic sewage is directly discharged, causing more and more serious environmental pollution problems. As of the end of March 2008, there were more than 1,300 sewage treatment plants in my country, with a total treatment capacity of 80 million cubic meters per day. Numerous sewage treatment plants have played an important role in solving my country's water pollution problems, but the sludge produced in sewage treatment has brought new environmental problems. More than 70% of the sewage treatment plants in my country do not have a complete sludge treatment process, and a large...

Claims

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Application Information

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IPC IPC(8): C02F11/02
Inventor王寿兵阮晓峰
OwnerFUDAN UNIV