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Mixed metal salt formula for increasing biogas yield of cassava vinasse waste liquid through fermentation

A technology of mixing metal and cassava distiller's grains, which is applied in the direction of fermentation, waste fuel, and the use of additive compounds to stimulate growth, etc., to achieve the effect of increasing diversity, sufficient elements, and promoting conversion rate

Active Publication Date: 2020-09-01
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, there are few reports in the prior art on increasing the biogas production of cassava distiller's grains by adding a certain formula of metal salts to the fermentation liquid

Method used

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  • Mixed metal salt formula for increasing biogas yield of cassava vinasse waste liquid through fermentation
  • Mixed metal salt formula for increasing biogas yield of cassava vinasse waste liquid through fermentation
  • Mixed metal salt formula for increasing biogas yield of cassava vinasse waste liquid through fermentation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Add 250 mg of ferrous chloride tetrahydrate, 1 mg of cobalt chloride hexahydrate, 5 mg of nickel chloride hexahydrate, 1 g of sodium acetate, 1 g of potassium dihydrogen phosphate, 1 g of dipotassium hydrogen phosphate, and magnesium sulfate in 1 L of fermentation broth. 50mg, manganese sulfate monohydrate 1mg, zinc sulfate monohydrate 0.1mg, calcium chloride 0.1mg and ammonium chloride 20mg mixed metal salt, add 1L of the above-mentioned mixed metal salt fermentation broth and 1L cassava distiller's waste liquid Placed in the BioprocessSimulator fermenter, pH=7.3 in the fermenter, COD=25500mg·L -1 , under the same experimental conditions, the cumulative biogas production was measured to be 25.18L, which was 10.39% higher than that of Comparative Example 1, the COD removal rate was raised to 83.52%, and the unit VS gas production was raised to 2.24L·g -1 .

Embodiment 2

[0070] In 1L of fermentation broth, add 400 mg of ferrous chloride tetrahydrate, 5 mg of cobalt chloride hexahydrate, 30 mg of nickel chloride hexahydrate, 3 g of sodium acetate, 0.5 g of potassium dihydrogen phosphate, 0.50 g of dipotassium hydrogen phosphate, Magnesium sulfate 150mg, manganese sulfate monohydrate 2mg, zinc sulfate monohydrate 0.6mg, calcium chloride 1.5mg and ammonium chloride 50mg are composed of a mixed metal salt, 1L of the fermentation broth added with the above mixed metal salt and 1L of cassava distiller's grains liquid together in the BioprocessSimulator fermenter, pH = 7.3 in the fermenter, COD = 23000mg L -1 , under the same experimental conditions, the cumulative biogas production was measured to be 27.00L, which was 18.37% higher than that of Comparative Example 1, the COD removal rate was raised to 86.66%, and the unit VS gas production was raised to 2.36L·g -1 .

Embodiment 3

[0072] In 1L of fermentation broth, add 355 mg of ferrous chloride tetrahydrate, 4 mg of cobalt chloride hexahydrate, 20 mg of nickel chloride hexahydrate, 2 g of sodium acetate, 0.4 g of potassium dihydrogen phosphate, 0.4 g of dipotassium hydrogen phosphate, Magnesium sulfate 100mg, manganese sulfate monohydrate 1.5mg, zinc sulfate monohydrate 0.5mg, calcium chloride 1mg and ammonium chloride 60mg are composed of a mixed metal salt, add 1L of the fermentation broth with the above mixed metal salt and 1L cassava distiller's grains liquid together in the BioprocessSimulator fermenter, pH=7.4 in the fermenter, COD=25000mg·L -1 Under the same experimental conditions, the cumulative biogas production was measured to be 35.05L, which was 53.66% higher than that of Comparative Example 1, the COD removal rate was increased to 90.02%, and the unit VS gas production was increased to 2.53L g -1 .

[0073] Table 3 Effects of this mixed metal salt additive on various indicators of cassa...

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Abstract

The invention belongs to the technical field of carbon-containing waste resource utilization, and particularly relates to a mixed metal salt formula for increasing the biogas yield of cassava vinassewaste liquid through anaerobic fermentation. The mixed metal salt formula is composed of ferrous chloride tetrahydrate, cobalt chloride hexahydrate, nickel chloride hexahydrate, sodium acetate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, magnesium sulfate, manganese sulfate monohydrate, zinc sulfate monohydrate, calcium chloride and ammonium chloride. The mixed metal salt is added into a fermented liquid to increase the biogas yield of cassava vinasse waste liquid through fermentation, and the formula can promote the rapid growth of anaerobic microorganisms, and increase the concentration and diversity of microorganisms and the biogas yield.

Description

technical field [0001] The invention relates to the technical field of resource utilization of carbonaceous waste, in particular to a mixed metal salt formula for increasing the amount of biogas produced by anaerobic fermentation of cassava distiller's grain waste liquid. Background technique [0002] According to relevant reports of the Food and Agriculture Organization of the United Nations, as of 2013, mainland China is the 14th largest cassava producer in the world, and it is also a major importer of dried cassava from Thailand and Vietnam. Cassava distiller's grain waste liquid is the waste liquid produced when cassava is used to produce ethanol. For every ton of ethanol produced by cassava in industry, about 9 to 15 tons of cassava distiller's waste liquid will be produced. According to relevant data, by 2020, the annual output of cassava ethanol in my country will reach 1 million tons, and at the same time, 9 to 15 million tons of cassava distiller's waste liquid wil...

Claims

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Application Information

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IPC IPC(8): C12N1/38C12P5/02
CPCC12N1/38C12P5/023Y02E50/30
Inventor 杜冬云蒋庆肯叶恒朋吴晨捷杜亚光
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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