Sludge aerobic composting reactor

An aerobic composting and reactor technology, which is applied in the fields of sewage/sludge fertilizer, application, organic fertilizer, etc., can solve the problems of loss of nutrients, secondary environmental pollution, and low cost.

Inactive Publication Date: 2008-03-26
FUJIAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional composting method is low in cost. However, it occupies a large area of ​​the ground and is likely to cause secondary pollution to the environment; the simple box-type composting method still has certain problems, mainly including: (1) The moisture content of the sludge is too high High, the moisture content of the sludge after dehydration treatment generally still reaches 82%, and the appropriate moisture content of the sludge aerobic composting process is 50-65%. Before composting, the sludge needs to be pretreated by drying and adding a large amount of conditioner. , which brings difficulties to practical engineering applications and increases the cost of sludge composting; (2) there are losses of nutrients such as nitrogen and phosphorus in the composting process, especially nitrogen, which is lost in large quantities in the form of volatilization of N and loss of filtrate; (3 ) There is a certain amount of heavy metal pollution in the sludge, which is one of the key factors restricting the land use of sludge composting

Method used

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Embodiment 1

[0021] The sludge aerobic composting reactor is composed of an air inlet and outlet control system, a stirring system, a fermentation tank system, and a heating and temperature control system.

[0022] In the fermentation tank system, the inner tank is cylindrical with a radius of 500mm and a height of about 1700mm, and is made of steel plates with a thickness of 3mm; The top is 400mm, and the compost outlet is 50mm from the bottom of the inner tank. The air supply volume of the blower is controlled within the range of 30L / min. The motor is powered by a three-phase power supply. The total power of the electric furnace wire is 2000W, and the temperature of the heating layer is controlled at 45°C.

[0023] Take 500kg of sludge with an initial moisture content of 82.15%, add 0.5% sodium polyacrylate and 6.0% sawdust, pour it into the feed inlet, let it stand for 20 minutes, discharge 100kg of sewage, start the motor, and stir for 20 minutes. Stand for fermentation, start the vac...

Embodiment 2

[0025] The reactor structure of sludge aerobic composting is the same as that of Example 1. The air supply volume of the blower is controlled within the range of 30L / min. The motor is powered by a three-phase power supply. The total power of the electric furnace wire is 2000W, and the temperature of the heating layer is controlled at 55°C.

[0026] Take 500kg of sludge with an initial moisture content of 78.15%, add 0.8% sodium polyacrylate and 6.0% sawdust, pour it into the feed inlet, let it stand for 20 minutes, discharge 95kg of sewage, start the motor, and stir for 20 minutes. Stand still for fermentation, start the vacuum pump and blower once every 12 hours, and blow and pump air for 10 minutes each time; start the motor once every 24 hours for stirring, stirring for 10 minutes each time, after 10 days, composting ends, open the compost The discharge port of the tank, the discharge is packed into bags.

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Abstract

The present invention relates to aerobic sludge compost reactor, and is especially one kind of aerobic sludge compost reactor for utilizing high water content sludge. Technologically, the aerobic sludge compost reactor consists of one air controlling system, one stirring system, one fermentation tank system and one heating and temperature controlling system. The fermentation tank system consists of one inner tank and one outer tank, and has sludge inlet, compost outlet, sewage discharge port and manually controlled sewage discharging unit. The air controlling system comprising blower and vacuumizing machine is connected to the fermentation tank through pipeline. The stirring system consists of motor, link rod and stirring blades. The heating and temperature controlling system consists of ceramic casing, asbestos, temperature inductor and control circuit. The present invention has convenient use, low cost, no environmental pollution and other advantages.

Description

technical field [0001] The invention relates to a sludge composting technology, in particular to an aerobic composting reactor utilizing high water content sludge. Background technique: [0002] Sludge is a black or dark brown fluid substance with a high water content (the water content of liquid sludge can reach 99%). A collection of things. Sludge mainly comes from municipal sludge (Civil sludge, also called sewage sludge Sewage sludge), pipe network sludge, river and lake sludge, industrial sludge, especially municipal sludge. With the rapid development of urbanization, urban sewage With the improvement of the treatment system, municipal sludge has become the largest type of sludge, and it has become a key factor affecting the normal operation of municipal construction and urban sewage treatment systems. Sludge not only has a high water content, is perishable, and has a strong odor, but also concentrates most of the organic matter, nutrients such as nitrogen and phospho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/02C05F7/00
CPCY02A40/20
Inventor 肖荔人陈庆华卢巧晖胡海滨黄宝铨
Owner FUJIAN NORMAL UNIV
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