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Method for producing fuel ethanol by utilizing papermaking sludge

A technology for papermaking sludge and fuel ethanol, which is applied in the field of solid waste resource recycling and environmental protection, can solve problems such as energy shortage and increase in papermaking sludge production, shorten the fermentation period, and promote the arrival and operation of gas production peaks. handy effect

Inactive Publication Date: 2012-12-19
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for producing fuel ethanol from papermaking sludge in view of the increasing amount of papermaking sludge and the increasingly serious problem of energy shortage

Method used

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  • Method for producing fuel ethanol by utilizing papermaking sludge
  • Method for producing fuel ethanol by utilizing papermaking sludge
  • Method for producing fuel ethanol by utilizing papermaking sludge

Examples

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Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Production of fuel ethanol using papermaking sludge

[0047] The papermaking sludge used in this example is taken from a paper mill in Guangdong Province, and papermaking sludge from other paper mills can also be used, which is one or more of pulping wastewater, papermaking wastewater or domestic sewage of paper mills. In the biochemical treatment process, the mixed sludge obtained in the primary settling tank and the secondary settling tank has a water content of 70-80%.

[0048] The monosodium glutamate waste liquid used in this example is taken from a certain monosodium glutamate factory in Guangdong Province, and can also use the monosodium glutamate waste liquid from other monosodium glutamate factories. Mixtures in any proportion.

[0049] (1) Uniformly disperse the retrieved fresh papermaking sludge;

[0050] (2) According to monosodium glutamate waste liquid: papermaking sludge=6: 100 (w / w, by dry mass), take fresh monosodium glutamate waste liquid,...

Embodiment 2

[0060] Example 2: Production of fuel ethanol using papermaking sludge.

[0061] The papermaking sludge used in this example is taken from a paper mill in Guangdong Province, and papermaking sludge from other paper mills can also be used, which is one or more of pulping wastewater, papermaking wastewater or domestic sewage of paper mills. In the biochemical treatment process, the mixed sludge obtained in the primary settling tank and the secondary settling tank has a water content of 70-80%.

[0062] The monosodium glutamate waste liquid used in this example is taken from a certain monosodium glutamate factory in Guangdong Province, and can also use the monosodium glutamate waste liquid from other monosodium glutamate factories. Mixtures in any proportion.

[0063] (1) Uniformly disperse the retrieved fresh papermaking sludge;

[0064] (2) According to monosodium glutamate waste liquid: papermaking sludge=10:100 (w / w, by dry mass), take fresh monosodium glutamate waste liquid...

Embodiment 3

[0074] Example 3: Production of fuel ethanol using papermaking sludge

[0075] The papermaking sludge used in this example is taken from a paper mill in Guangdong Province, and papermaking sludge from other paper mills can also be used, which is one or more of pulping wastewater, papermaking wastewater or domestic sewage of paper mills. In the biochemical treatment process, the mixed sludge obtained in the primary settling tank and the secondary settling tank has a water content of 70-80%.

[0076] The monosodium glutamate waste liquid used in this example is taken from a certain monosodium glutamate factory in Guangdong Province, and can also use the monosodium glutamate waste liquid from other monosodium glutamate factories. Mixtures in any proportion.

[0077] (1) Uniformly disperse the retrieved fresh papermaking sludge;

[0078] (2) take by weighing fresh monosodium glutamate waste liquid according to monosodium glutamate waste liquid: papermaking sludge=3: 100 (w / w, in...

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Abstract

The invention provides a method for producing fuel ethanol by utilizing papermaking sludge. In the method, a monosodium glutamate waste liquor is utilized as an energy conditioner for the papermaking sludge, appropriate C / N is obtained, cellulase is added to promote saccharification decomposition of materials, meanwhile a potato nutrient solution is added into the reaction system, and saccharomyces cerevisiae liquor after being cultured is inoculated, thus the saccharification and fermentation of raw material are realized in the same reactor, ethanol can be produced after 5 hours after the fermentation, and no reducing sugar is accumulated. The method provided by the invention is convenient in the whole preparation process, and has the advantages that the process is simple, the energy consumption is reduced, industrial solid waste (papermaking sludge) is utilized to substitute the traditional saccharide and grain raw materials used for producing ethanol, and meanwhile another industrial solid waste (monosodium glutamate waste liquor) is used for optimizer system nutrition structure and is utilized to promote aerogenesis peak and shorten the fermentation period, thus not only improving the processing capacity and processing efficiency of a reactor but also realizing 'free treatment, reducing and recycling' of two solid wastes.

Description

technical field [0001] The invention belongs to the field of recycling of solid waste resources and environmental protection, and in particular relates to a resource utilization technology of papermaking sludge, and more specifically relates to a method for producing fuel ethanol by using papermaking sludge. Background technique [0002] In my country, the paper industry is a large water consumer. A large amount of papermaking wastewater produced in the papermaking process produces a large amount of papermaking sludge in the process of biochemical treatment (papermaking sludge refers to the biochemical treatment of paper mill wastewater in the primary sedimentation tank and mixed sludge obtained in the secondary settling tank). According to statistics, in 2007, my country produced approximately 23.89 million tons of dewatered papermaking sludge (with a moisture content of 80%) and 4.78 million tons of dry sludge. 80%, 6.18 million tons of dry sludge). [0003] Faced with suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/08C12P19/14C12R1/865
Inventor 林云琴王德汉王钍汀吴少全
Owner SOUTH CHINA AGRI UNIV
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