Sludge fermentation dehydration drying method

A drying method and sludge technology, applied in water/sludge/sewage treatment, sludge treatment, biological sludge treatment, etc., can solve the problems of reducing calorific value and long treatment time, so as to reduce calorific value and speed up Effect of fermentation speed and energy consumption reduction

Active Publication Date: 2007-08-01
SWISON CREATIVE ENVIRONMENTAL SOLUTIONS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another solution is to reduce the calorific value by turnin...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take urban sludge with a water content of 80.6%, add filtrate to adjust the water content to 90%; add 1# additive, that is, contain Fe 3+ Chemical raw materials, the addition amount is 0.5%, fully stirred and reacted for 8 minutes, and then added 2# additives, that is, containing Ca 2+ Chemical raw materials, the addition amount is 1.5%, fully stirred and reacted for 5 minutes. The adjusted sludge is injected into the plate and frame filter press through the plunger pump, and the sludge inlet pressure is 0.3MPa. When the sludge volume is reached, the pressure is maintained at a pressure of about 1.8MPa for 70 minutes to remove the water in the sludge. . After the pressure holding is completed, the pressure is released and the material is discharged, and the moisture content of the sludge reaches 57.3%. The dehydrated sludge is stacked through the conveyor belt, and the internal temperature of the sludge is about 55°C for one day. Then use the turning machine to turn ...

Embodiment 2

[0015] Take urban sludge with a water content of 80.6%, add filtrate to adjust the water content to 96%; add 1# additive, that is, contain Fe 3+ Chemical raw materials, the addition amount is 1%, fully stirred and reacted for 15 minutes. The adjusted sludge is injected into the plate and frame filter press through the plunger pump, and the sludge inlet pressure is 0.4MPa. When the sludge volume is reached, the pressure is maintained at a pressure of about 2.0MPa for 50 minutes to remove the water in the sludge. . After the pressure holding is completed, the pressure is released and the material is discharged, and the moisture content of the sludge reaches 60.1%. The dehydrated sludge is piled up through the conveyor belt, and the internal temperature of the sludge is about 58°C after one day of stacking. Then use the turning machine to turn the material intermittently, and the interval time is 12 hours. The air blown at the bottom during material turning is relatively dry a...

Embodiment 3

[0017] Take urban sludge with a water content of 80.6%, add filtrate to adjust the water content to 93%; add 2# additives, that is, contain Ca 2+ Chemical raw materials, the addition amount is 0.5%, fully stirred and reacted for 11 minutes. Inject the adjusted sludge into the plate and frame filter press through the plunger pump. The sludge inlet pressure is 0.5MPa. When the sludge volume reaches the pressure, keep the pressure at about 2.5MPa for 40 minutes to remove the water in the sludge. . After the pressure holding is completed, the pressure is released and the material is discharged, and the moisture content of the sludge reaches 63.7%. The dehydrated sludge is piled up through the conveyor belt, and the internal temperature of the sludge is about 59°C after one day of stacking. Then use the turning machine to turn the material intermittently, and the interval time is 11 hours. The air blown at the bottom during material turning is relatively dry air or unsaturated a...

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Abstract

The invention discloses a ferment dewater drying method of sludge, which comprises the following steps: inputting sludge with moisture percentage at 90-97% into tempering groove; adding Fe3+ with 0.5-1.5% and Ca2+ or chemical materials to stir and mix 8-16min; tempering evenly; injecting modified sludge into plate filter press; keeping 30-70min at 1.5Mpa-2.5Mpa; descending moisture percentage of sludge to about 55-65%; introducing sludge of being pressed to sludge fermentation tank through band carrier; blowing air through the bottom with volume of blast at 4500-5000m3/h; accelerating speed of fermentation to dry water from sludge. The invention can drop caloric value of sludge.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a sludge fermentation, dehydration and drying method. Background technique [0002] With the development of my country's industry and the process of urbanization, the amount of sewage treatment is increasing, and the sludge output of water treatment plants is increasing year by year. The bottom mud of urban drainage ditches or urban rivers also needs to be dredged regularly for the smooth flow of floods. These sludges have gradually become a serious environmental problem. Because the sludge produced in the sewage treatment process has the characteristics of high water content, perishable, foul smell, parasite eggs and pathogenic microorganisms. If it is discharged indiscriminately, it will cause secondary pollution. At present, the sludge in most sewage treatment plants in my country is directly landfilled, thrown into the sea or used in agricultur...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/12C02F11/02C05F7/00
CPCY02A40/20
Inventor 钟环声李雷杨海英李观尚候继国
Owner SWISON CREATIVE ENVIRONMENTAL SOLUTIONS CO LTD
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