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Method for utilizing sludge from municipal sewage treatment plant as forestry soil matrix

A technology for urban sewage and treatment plants, applied in sewage/sludge fertilizer, biological organic part treatment, application, etc. Problems such as low disposal capacity, to achieve the effect of low application risk, increased wood yield, and accelerated growth

Inactive Publication Date: 2013-12-04
南京市生态环境保护科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The sludge compost currently used is only simple mixing and fertilizer making, without stabilization and aerobic fermentation treatment; the sanitary landfill of sludge adopts the direct landfill method, without further dehydration and inorganic treatment; standardized disposal of sludge The ability is low and needs to be effectively improved

Method used

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  • Method for utilizing sludge from municipal sewage treatment plant as forestry soil matrix
  • Method for utilizing sludge from municipal sewage treatment plant as forestry soil matrix

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Embodiment 1

[0016] A kind of method that present embodiment provides using the sludge of urban sewage treatment plant as forestry soil matrix, structure as shown in Figure 1, comprises the following steps:

[0017] (1) Prepare the land for planting to ensure drainage in case of waterlogging and irrigation in case of drought;

[0018] (2) Select a sludge composting site near the planting plot, excavate drainage ditches around the composting site, set up a plastic film greenhouse on the top, tamp the sludge composting site, and then lay waterproof rolls, and leave a certain amount of water. Slope, set leachate interception barrel under the slope, and condensate diversion groove outside the greenhouse;

[0019] (3) Transport the sludge and medicinal residue additives to the sludge composting site, and mix them at a weight ratio of 1.5:1. The moisture content of the sludge is 80%, and the moisture content of the medicinal residue additives is 30%; add an appropriate amount of For the inocula...

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Abstract

The invention discloses a method for utilizing sludge from a municipal sewage treatment plant as forestry soil matrix and belongs to the technical field of environmental protection. The sludge is utilized according to a composting method; the nutrition constituents in the sludge are fully utilized; the growth of trees is accelerated; the growth cycle of the wood is shortened; the yield of wood is increased; the harmful matters in the sludge do not participate in food chain cycle; and the application risk is smaller. The garden plants can accept high-concentration heavy metal, the poison symptom is difficult to occur, and the sludge is safer than vegetables and crops after the compost is applied to forest land, so that the utilization of the sludge for composting the forest land is wide in developing space.

Description

technical field [0001] The invention relates to a method for using urban sewage treatment plant sludge as a forestry soil matrix, and belongs to the technical field of environmental protection. Background technique [0002] In recent years, with the popularization of sewage treatment facilities, the improvement of treatment rate and the deepening of treatment degree, the amount of sludge produced by sewage treatment has also increased significantly. Sludge from urban sewage plants refers to the solid, semi-solid and liquid wastes produced by sewage treatment, which contain a large amount of salts, heavy metals, pathogenic bacteria and pathogenic bacteria, etc. These substances may cause harm to the environment and human and animal health. Hazard, if not properly disposed of, it will easily cause secondary pollution. Taking Nanjing City as an example, the annual sludge production is about 200,000 tons, and the main disposal methods are incineration, composting and landfill. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F17/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 周艳文府灵敏陈森陈鸣俞欣
Owner 南京市生态环境保护科学研究院
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