Method for improving dehydration performance of anaerobic digestion substrate of papermaking sludge by virtue of combination of two flocculants

A papermaking sludge and anaerobic digestion technology, which is applied in dehydration/drying/concentrated sludge treatment, processing wastewater treatment, etc., can solve the problems of high sediment, low moisture content of mud cake, high cost, etc., and achieve high efficiency solid-liquid Separation, strong operability, low water content effect

Inactive Publication Date: 2015-09-16
SOUTH CHINA AGRI UNIV
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Problems solved by technology

Generally speaking, conventional inorganic flocculants are cheap, but the addition of inorganic flocculants not only consumes a lot of chemi...

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  • Method for improving dehydration performance of anaerobic digestion substrate of papermaking sludge by virtue of combination of two flocculants
  • Method for improving dehydration performance of anaerobic digestion substrate of papermaking sludge by virtue of combination of two flocculants
  • Method for improving dehydration performance of anaerobic digestion substrate of papermaking sludge by virtue of combination of two flocculants

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Embodiment 1

[0026] (1) Papermaking sludge (taken from Guangzhou Paper Mill, which is biochemical sludge obtained in the process of papermaking wastewater treatment, with a moisture content of 43 to 46%), monosodium glutamate waste liquid ( Taken from Guangzhou Aosang Monosodium Glutamate Factory, with a moisture content of 45-50%), inoculated sludge (referring to one or more of the anaerobic digested sludge from septic tank sludge, spoiled river sludge, or urban sewage treatment plant) The seed sludge obtained after domestication; the present invention adopts the domestication method to cultivate the seed sludge, and selects the domesticated papermaking sludge after 2 months of anaerobic fermentation as the inoculation sludge, with a moisture content of 87.07%) and distilled water for joint anaerobic fermentation. The fermentation condition is that the mass solid content of the fermentation material (papermaking sludge, monosodium glutamate waste liquid, inoculation sludge and distilled wa...

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Abstract

The invention belongs to the field of sewage treatment techniques and environmental protection and discloses a method for improving the dehydration performance of an anaerobic digestion substrate of papermaking sludge by virtue of combination of two flocculants. The method comprises the following steps: regulating the pH value of the anaerobic digestion substrate of the papermaking sludge to 6.0; firstly feeding 1% aluminum polychlorid solution (counted by dry basis), stirring, feeding 0.1% organic polymer flocculant cationic polyacrylamide solution (counted by dry basis) for chemical conditioning; carrying out a vacuum filtration dehydration process. According to the method, the moisture content of the anaerobic digestion substrate of the papermaking sludge is decreased from 75% to be about 37%, and the dehydration rate reaches 85% or above; the application process is simple, and the operability is strong; by virtue of simple suction filtration dehydration on the conditioned anaerobic digestion substrate of the papermaking sludge, relatively low moisture content can be achieved, efficient solid-liquid separation can be realized, and a foundation is laid for the duly treatment of the anaerobic digestion substrate of the papermaking sludge, so that the method has an important engineering application value.

Description

technical field [0001] The invention belongs to the field of sludge treatment technology and environmental protection, and relates to a method for improving the dehydration performance of anaerobic digestion substrate of papermaking sludge through combined use of two types of flocculants. Background technique [0002] Papermaking sludge is a typical solid by-product produced in the papermaking industry, which originates from the biochemical treatment of wastewater generated during the production process of enterprises. The output of my country's pulp and paper industry has ranked first in the world. In 2007, my country produced about 2.7×10 paper sludge. 7 tons (moisture content is 80%), and will grow at a rate of 10% every year. Papermaking sludge is a kind of biological solid waste, and biological treatment has become a potential trend for resource utilization of papermaking sludge. Among the various methods of biological treatment, anaerobic digestion technology is curr...

Claims

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Application Information

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IPC IPC(8): C02F11/14C02F103/28
Inventor 林云琴曾超曾碧霞吴杭航
Owner SOUTH CHINA AGRI UNIV
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