Method for improving methane yield of sludge anaerobic digestion by utilizing iron/carbon/biological enzyme coupling technology

An anaerobic digestion and biological enzyme technology, applied in the field of municipal engineering sludge treatment and environmental engineering, can solve the problems of low biogas production, low substrate conversion rate, low operating cost, etc., to improve the promotion effect, enhance microbial activity, The effect of enhancing resilience

Pending Publication Date: 2022-04-08
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reinforcing agent (nano-zero-valent iron and activated carbon and koji leaching filtrate) adopted in the present invention is low in cost, all cheap and easy to get, and the addition amount is less, and the operation cost is low, has good application prospect, solves the anaerobic problem in the prior art Technical problems of low substrate conversion rate and low biogas production in the digestion process

Method used

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  • Method for improving methane yield of sludge anaerobic digestion by utilizing iron/carbon/biological enzyme coupling technology
  • Method for improving methane yield of sludge anaerobic digestion by utilizing iron/carbon/biological enzyme coupling technology
  • Method for improving methane yield of sludge anaerobic digestion by utilizing iron/carbon/biological enzyme coupling technology

Examples

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Embodiment 1

[0034] A method for increasing the amount of methane produced in sludge anaerobic digestion using iron / charcoal / biological enzyme coupling technology, comprising the following steps:

[0035] (1) Obtain the concentration tank sludge of sewage treatment plant, its pH value is 6.84, TSS is 17.4g / L, and VSS is 11.6g / L;

[0036](2) Weigh 5g of liquor koji and place it in a 250mL conical flask, add 100mL of distilled water, place in a constant temperature water bath at 35°C for 0.5h, then use medium-speed quantitative filter paper to carry out suction filtration, and sieve out large particles and some molds and yeasts to obtain The leachate is used for later use; Baijiu koji is purchased from Angel Yeast Co., Ltd. Baijiu koji is rich in various microorganisms, among which yeast and mold are the main ones. Enzymes, etc., can decompose organic matter in municipal sludge, and large particles and some mold and yeast can be removed by suction filtration, so as not to affect the subseque...

Embodiment 2

[0042] A method for increasing methane production during sludge anaerobic digestion using iron / charcoal / biological enzyme coupling technology, comprising the following steps:

[0043] (1) Obtain sludge from the concentration tank of sewage treatment plant, its pH value is 6.52, TSS is 26.3g / L, VSS is 12.3g / L;

[0044] (2) Weigh 20g of liquor koji and place it in a 250mL conical flask, add 100mL of distilled water, place it in a constant temperature water bath at 40°C for 1 hour, then use a medium-speed quantitative filter paper to carry out suction filtration, sieve out large particles and some molds and yeasts, and obtain the immersion The filtrate is ready for use;

[0045] (3) The sludge is injected into 4 reaction containers in equal amounts, and except for the blank, 0.16g nanometer zero-valent iron+0.192g activated carbon+8mL liquor koji leaching filtrate is added respectively in the remaining three reaction containers; 0.16g Nano zero-valent iron + 0.192g activated car...

Embodiment 3

[0050] A method for increasing the amount of methane produced in sludge anaerobic digestion using iron / charcoal / biological enzyme coupling technology, comprising the following steps:

[0051] (1) Obtain sludge from the concentration tank of sewage treatment plant, its pH value is 6.73, TSS is 17.3g / L, and VSS is 12.4g / L;

[0052] (2) Weigh 30g of white wine koji and put it in a 250mL conical flask, add 100mL of distilled water, put it in a constant temperature water bath at 45°C for 1.5h, then use a medium-speed quantitative filter paper to carry out suction filtration, and sieve out large particles and some molds and yeasts to obtain The leachate is ready for use;

[0053] (3) The sludge is injected into 6 reaction vessels in equal amounts, except for the blank, add 0.16g nanometer zero-valent iron+0.192g activated carbon+100ml / L liquor koji leaching filtrate respectively in the remaining three reaction vessels; 0.16g nanometer zero valent iron + 0.192g activated carbon + 15...

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Abstract

The invention provides a method for increasing the methane yield of sludge anaerobic digestion by utilizing an iron/carbon/biological enzyme coupling technology, which comprises the following steps: S1, weighing Baijiu koji, putting into a triangular flask, adding distilled water, carrying out constant-temperature water bath for 0.5-1.5 hours, then carrying out suction filtration by using quantitative filter paper, and screening out large-particle substances and part of mould and saccharomycetes to obtain a leaching solution for later use; s2, injecting sludge into an anaerobic reaction container, adding nano zero-valent iron, activated carbon and the Baijiu distiller's yeast leaching filtrate prepared in the step S1, continuously filling inert gas, removing oxygen, and sealing the reaction container; and S3, carrying out constant-temperature anaerobic digestion on the sealed reaction container. The reinforcer (nano zero-valent iron, activated carbon and distiller's yeast leaching liquor) adopted by the method is low in cost, cheap and easy to obtain, small in addition amount and low in operation cost, has a good application prospect, and solves the technical problems of low substrate conversion rate and low biogas yield in the anaerobic digestion process in the prior art.

Description

technical field [0001] The invention relates to the technical field of sludge treatment in environmental engineering and municipal engineering, in particular to a method for increasing the amount of methane produced by anaerobic digestion of sludge by using iron / charcoal / biological enzyme coupling technology. Background technique [0002] With the growth of population and the rapid development of economy, large-scale construction of urban sewage treatment facilities has continuously increased the amount of urban sewage treatment, and the amount of residual sludge has also increased sharply. The residual organic pollutants, toxic metals and pathogenic microorganisms in sludge pose a threat to the environment and human health, so the reasonable disposal of sludge is very important for environmental protection. [0003] Anaerobic digestion is considered to be an energy-efficient and promising method for treating excess activated sludge. Anaerobic digestion can produce high val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04
Inventor 李咏梅王思远平倩王林陈镒锋李敦杰
Owner TONGJI UNIV
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