Method for integrating technique of damp drying sludge with technique for fermenting acrobic compost in high temperature

An aerobic composting and technology integration technology, applied in the fields of sewage/sludge fertilizer, dewatering/drying/concentrated sludge treatment, organic fertilizer, etc. Large and other problems, to achieve the effect of high degree of automation, low air demand, and high safety

Inactive Publication Date: 2006-02-01
BEIJING BRANCH JIKE DEV SCI & TECH
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Problems solved by technology

The degree of automation is low, and contactless and unmanned operation cannot be realized
The odor generated during the fermentation process will cause serious environmental pollution, and a deodorizing device is required to solve this problem
[0008] Due to certain defects in the high-temperature aerobic composting technology, at present, the drying technology is mainly used in the disposal of municipal sludge in foreign countries. Large, high energy consumption, and has certain security risks

Method used

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  • Method for integrating technique of damp drying sludge with technique for fermenting acrobic compost in high temperature
  • Method for integrating technique of damp drying sludge with technique for fermenting acrobic compost in high temperature

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Embodiment Construction

[0025] Over the years, experts at home and abroad have done a lot of analysis, research and experiments in this area. Among them, the energy consumed in the sludge drying process with different water contents was compared and analyzed, and the energy consumption of sludge drying and the water content of sludge were obtained. rate curve, see figure 1 .

[0026] Depend on figure 1 It can be seen from the relationship curve of the dewatered sludge that the dewatered sludge is heated and dried to reduce the water content from 80% to 60%. The energy consumption is also small, and the energy consumption of these two stages is basically close to the theoretical value; the sludge has a moisture content between 35% and 60%, which is the plastic stage of the sludge, and the fluid characteristics of the sludge at this stage are similar to glue, colloidal, It is viscous and difficult to handle. It consumes a sharp increase in drying energy and is difficult to dry. According to the abov...

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Abstract

A process for treating the sludge generated by sewage treating plant, petrochemical plant, etc to obtain the compost includes semi-drying and high-temp aerobic fermenting. Its advantages are high automation level and low cost.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and relates to a method for harmless, resourceful treatment and reuse of sludge. Background technique [0002] At present, there are many treatment methods for the sludge discharged from domestic and industrial production, among which high-temperature aerobic composting technology and sludge drying technology are commonly used. [0003] The high-temperature aerobic composting technology is to mix dewatered sludge with a moisture content of 80% and about double the dry sludge with a moisture content of less than 10%, bacteria, additives (fly ash), etc., so that the mixed material The moisture content is about 55% (high-temperature aerobic composting requires the moisture content of the material to be 55%), and then the material is evenly sent to the horizontal fermentation bin through special equipment, and the material is fully aerobically fermented by forced ventilation in the f...

Claims

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Application Information

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IPC IPC(8): C02F11/12C05F7/00C05F17/00
CPCY02A40/20Y02W30/40
Inventor 王璠霍跃文王涛
Owner BEIJING BRANCH JIKE DEV SCI & TECH
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