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Soil improving method of sludge compost

A soil improvement and composting technology, applied to sewage/sludge fertilizers, organic fertilizers, inorganic fertilizers, etc., can solve the problems of high heavy metal content, and achieve the effects of simple operation, reduced bulk density, and easy operation

Inactive Publication Date: 2018-04-24
广州普邦园林股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The invention provides an effective, low-cost, and easy-to-operate soil improvement method for sludge composting. The method solves the problems of high EC value, pH value and heavy metal pollution during sludge composting by further processing sludge composting. high content problem

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Embodiment 1-16

[0053] Embodiments 1-16 are based on the basic embodiments and obtained by adjusting specific technical parameters, as shown in Tables 1-5.

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Abstract

The invention discloses a soil improving method of sludge compost. The method includes: mixing a heavy metal passivator with sludge compost to prepare a compost mixture; air-drying the mixture; addingdesulfurized gypsum powder, original soil and charcoal into the air-dried mixture to obtain an improved soil finished product. By adding the heavy metal passivator, the desulfurized gypsum powder andthe charcoal, content of active-state heavy metal is lowered obviously, pH value of soil is lowered, water-holding capacity of the soil is improved, and germination index of the soil when used for plant culture is increased. The method is suitable for saline-alkaline land improvement, sandy soil improvement and mine restoration.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, specifically relates to the technical field of sludge utilization, and more specifically relates to a method for improving soil by composting sludge. Background technique [0002] Municipal sludge is solid waste produced after urban sewage treatment, and it increases rapidly with the increase of sewage treatment rate. Municipal sludge usually contains a large number of toxic and harmful substances such as various microorganisms, heavy metals, and synthetic organic matter. A large amount of untreated sludge entering the environment will cause secondary pollution to water bodies and the atmosphere. At the same time, municipal sludge also contains nitrogen, phosphorus, and potassium needed for plant growth and development, as well as various trace elements to maintain normal plant growth and development, and also contains organic matter that can improve soil structure. At present, most of the s...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/80
CPCC05D3/02C05F7/00C05G3/80C05D9/00
Inventor 谢腾芳张立超刘晓丹李灿麦凝珺李典宝曾志斌李冰敏
Owner 广州普邦园林股份有限公司
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