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Life sludge compost disposal method of sewage disposal plant

A technology for sewage treatment plants and domestic sludge, applied in sewage/sludge fertilizers, fertilization devices, combined biological treatment, etc., can solve the problems of high operating costs, achieve the effects of reducing moisture content and removing odors

Pending Publication Date: 2017-06-27
湖北生态工程职业技术学院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its fatal disadvantage is that the operating cost is too high

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  • Life sludge compost disposal method of sewage disposal plant
  • Life sludge compost disposal method of sewage disposal plant
  • Life sludge compost disposal method of sewage disposal plant

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Effect test

Embodiment 1

[0044] In order to better complete the task of the urban domestic sludge composting disposal project, the sludge composting disposal test was carried out on March 9 this year, and the sludge was retrieved from the Taipingdian Town Wastewater Treatment Plant and mixed with mushroom slag at a volume ratio of 1:1. Then, add 1kg of fermenting agent to each ton of mixture to carry out composting fermentation test. After more than 20 days of fermentation, the organic nutrient soil material treated with sludge and sludge and mushroom slag combined composting, after Pony The test results of Test Group Shanghai Co., Ltd. show that the sludge from Taipingdian sewage treatment has low heavy metal content and can meet the requirements of composting to produce organic nutrient soil. 1. Its quality can basically meet the quality requirements of organic nutrient soil products. Therefore, the sludge from Taipingdian Sewage Treatment Plant can be composted to produce organic nutrient soil, and...

Embodiment 2

[0049] Composting treatment: designed to process 15 tons of sludge per day, with a moisture content of 90-93%, through primary and secondary fermentation, decomposing and drying to make organic nutrient soil, and finally achieve a 100% harmless rate of urban domestic sludge. It meets the requirements of Hubei Province for the treatment of urban domestic sludge.

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Abstract

The invention discloses a life sludge compost disposal method of a sewage disposal plant. The method includes: evenly premixing sludge with fermentation microorganisms prior to placing the mixture in a fermentation tank; sequentially performing primary fermentation (a main fermentation stage) and a secondary fermentation (an aging stage), drying fermented semi-finished products with test results capable of meeting standard requirements of NY525-2012 organic nutrition soil material products, and reducing moisture content to 30%; mixing the fermented semi-finished products with plant ash in a stock bin, adding fungicide after mixing, and performing measurement packing after scattering and sieving. With the method, sludge stabilization and harmless disposal facilities are improved, reduction of moisture content, removal of stink and killing of parasitic ovum and pathogens are further preformed, requirements on stability and harmlessness are achieved, and resource utilization on the obtained organic nutrition soil series products is performed.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a method for composting domestic sludge in a sewage treatment plant. Background technique [0002] With the rapid development of my country's social economy and urbanization process, the amount of urban sewage treatment is increasing, and the corresponding amount of sludge is also increasing. Solving the "sludge besieged city" has gradually been put on the agenda of urban construction and development by many large cities in China. If it cannot be safely disposed of, it will lead to a large backlog of sludge in the sewage treatment plant, which will seriously affect the normal operation of the sewage treatment plant, and may even cause a complete paralysis of the sewage treatment system, which will directly affect the river water environment of our city. It can make the city's river pollution control efforts over the years go to waste. Therefore, the construction of sludge treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F15/00C05F7/00C05F17/00
CPCC05F5/00C05F7/00C05F17/50C05F11/08Y02A40/20Y02W30/40
Inventor 王守富何利华贺辉张挺江雄波王晓王聪
Owner 湖北生态工程职业技术学院
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