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An energy-saving, efficient and rapid biological drying technology for municipal sludge

An urban sludge, high-efficiency technology, applied in sludge treatment, biological sludge treatment, dewatering/drying/concentrating sludge treatment, etc., can solve problems such as difficult application, achieve the effect of saving energy and speeding up the drying process

Active Publication Date: 2018-02-02
广州市净水有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relevant research at the laboratory level is difficult to apply in large-scale production

Method used

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  • An energy-saving, efficient and rapid biological drying technology for municipal sludge
  • An energy-saving, efficient and rapid biological drying technology for municipal sludge
  • An energy-saving, efficient and rapid biological drying technology for municipal sludge

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Embodiment Construction

[0023] A method for energy-saving, efficient and rapid drying of municipal sludge, comprising the following steps:

[0024] 1) Cultivation of high-temperature strains;

[0025] 2) Centrifugal dehydration of sludge;

[0026] 3) After dehydration, the sludge is mixed with high-temperature strains, ventilated and dried.

[0027] For the cultivation of the high-temperature bacteria, the main material is one or more of wheat straw bran, corncob bran or soybean powder, calculated as more than 95-98 parts by weight, and the auxiliary materials are general calcium, wheat bran, urea , starch, glucose, sucrose, peptone, potassium dihydrogen phosphate and magnesium sulfate, the auxiliary material is 2-5 parts by weight, and the sum of the main material and the auxiliary material is 100 parts.

[0028] The cultivation conditions of the high-temperature strains are as follows: the water content is 50-60%, natural ventilation, and the temperature is not higher than 37°C. After 30 days, a ...

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Abstract

The invention discloses a municipal sludge energy-saving high-efficiency fast bio-drying technology. According to the invention, with a high-temperature strain and a corresponding ventilation structure, municipal sludge can be dried fast, a drying process can be accelerated, and energy can be saved. According to the invention, a 55 DEG C high-temperature stage is maintained for 20 days, and a 65 DEG C high-temperature stage is maintained for 13 days, such that harmful pathogens in sludge can be thoroughly killed. Also, when the method provided by the invention is combined with corresponding equipment, the scale of the drying process can be expanded.

Description

technical field [0001] The invention relates to a sludge treatment technology, in particular to an energy-saving, high-efficiency and rapid biological drying technology of urban sludge. Background technique [0002] Sludge is a substance produced in the process of sewage treatment. It is mainly composed of microorganisms, and includes solid particles such as sediment, fiber, animal and plant residues mixed in domestic sewage or industrial and mining wastewater, and adsorbed organic matter, metals, bacteria, The complex of insect eggs and other substances has the main characteristics of high organic matter content, fine particles, high moisture content, and difficult dehydration. Sludge contains nitrogen, phosphorus, and potassium needed for plant growth and development, various trace elements to maintain normal plant growth and development, and organic matter that can improve soil structure. After composting, it has certain value and potential advantages when used as fertili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02C02F11/12
CPCY02W10/20
Inventor 李碧清唐瑶严兴万金柱胡丽娅冯新宋爽陈志君许家文苏捷庞博罗刚
Owner 广州市净水有限公司