Technology for producing biogas from organic waste reinforced by lime mud from papermaking process

A technology of organic waste and paper-making white mud, applied in fermentation, waste fuel, etc., can solve the problems of small gas production, complex microorganisms are easily affected by acidified environment, and start-up failure, so as to improve gas production capacity, realize double waste reduction and The effect of waste recycling application

Inactive Publication Date: 2017-07-11
ANHUI MEINI PAPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic waste is easy to degrade, and the complex microorganisms in the anaerobic digestion system are easily affected by the acidification environment, so that the process of hydrogen production and methane production has always had problems such as unstable gas production, small gas production, or too long acidification time, resulting in start-up failure.

Method used

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  • Technology for producing biogas from organic waste reinforced by lime mud from papermaking process
  • Technology for producing biogas from organic waste reinforced by lime mud from papermaking process
  • Technology for producing biogas from organic waste reinforced by lime mud from papermaking process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Comparative experimental scheme of different additives

[0032] Preparation before experiment:

[0033] (1) Prepare LMP powder with a particle size of 70 mesh;

[0034] (2) Acclimate the inoculum sludge at 37 degrees Celsius;

[0035] (3) Disperse the organic waste, and the particle size of the organic waste is about 2.0 mm.

[0036] Experimental procedure:

[0037] (1) Take 4.0 g of alkaline additives (CaCO3, NaHCO3, LMP, and egg shells) of the same quality and put them into reactors with an effective volume of 500 mL. Take another same reactor without adding any exogenous alkaline substance as a control, and number it accordingly;

[0038] (2) Add an appropriate amount of deionized water to the marked numbered reactors to dissolve and dilute the additives;

[0039] (3) Accurately weigh 200 g of evenly mixed organic waste test raw materials and 20% (based on the effective volume of the reactor) inoculated sludge, and move them into each reactor in turn, and use de...

Embodiment 2

[0046] At 37 degrees Celsius, a comparative experiment scheme using different concentrations of LMP as an additive:

[0047] Preparation before experiment:

[0048] (1) Prepare LMP powder with a particle size of 70 mesh;

[0049] (2) Acclimate the inoculum sludge at 37 degrees Celsius;

[0050] (3) Disperse the organic waste, and the particle size of the organic waste is about 2.0 mm.

[0051] Experimental procedure:

[0052] This program adds different amounts of LMP to the organic waste anaerobic digestion system to investigate the effect of LMP addition on the performance of the organic waste mesophilic (37 ℃) anaerobic digestion system, and further explores the buffering effect of LMP on the organic anaerobic methanogenesis system. ability.

[0053] (1) Weigh different amounts of LMP powder (1.0 g, 3.0 g, 5.0 g, 7.0 g) and put them into reactors with an effective volume of 500 mL. Take another same reactor without adding LMP as a control test, and number them respecti...

Embodiment 3

[0061] At 55 degrees Celsius, a comparative experiment scheme using different concentrations of LMP as an additive:

[0062] Preparation before experiment:

[0063] (1) Prepare LMP powder with a particle size of 70 mesh;

[0064] (2) Acclimate the inoculum sludge at 55 degrees Celsius;

[0065] (3) Disperse the organic waste, and the particle size of the organic waste is about 2.0 mm.

[0066] Experimental procedure:

[0067] This program adds different amounts of LMP to the organic waste anaerobic digestion system to investigate the effect of LMP addition on the performance of the organic waste mesothermal (55 ℃) anaerobic digestion system, and further explores the buffering effect of LMP on the organic anaerobic hydrogen production system ability.

[0068] (1) Weigh different amounts of LMP powder and place them into reactors with an effective volume of 500 mL. Take another same reactor without adding LMP as a control test, and number them respectively;

[0069] (2) Ad...

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Abstract

The invention relates to papermaking waste treatment, specifically to technology for producing biogas from organic waste reinforced by lime mud from a papermaking process, solving the problem that lime mud from a papermaking process is hard to treat in the prior art. According to the process, lime mud from a papermaking process (LMP) is taken as an exogenous calcium-based additive, plays a function of buffering an acidifying process of biological fermentation and supplementing inorganic nutrient elements, and improves the biogas production capability of an organic waste anaerobic digestion system. LMP cooperates with organic waste to perform combined anaerobic digestion, and alkaline LMP is used to neutralize acidified products in the biological fermentation process. According to the technology, problems that LMP causes soil alkalization and air and water pollution and organic waste decay fast, smell odor and become sour are solved, and clean energy is generated, so that dual waste reduction and waste recycling application are realized.

Description

technical field [0001] The invention relates to the treatment of papermaking waste, in particular to a technology of papermaking white mud strengthening organic waste to produce biogas. Background technique [0002] With the increasing requirements for environmental protection, solving the pollution problem caused by solid waste generated by the pulp and paper industry has gradually become a hot spot that social producers and academic circles generally pay attention to. Among them, the most prominent is the large amount of muddy precipitated by-products produced by the causticization reaction in the alkali recovery process of pulp and paper mills - causticizing white mud (also known as paper white mud), accounting for about 100% of the total after washing and concentration 70% of solid waste volume. About 0.5 tons of lime mud (lime mud from paper-making process, LMP) will be produced for every 1.0 tons of coarse pulp produced. Because LMP has strong alkalinity, it is easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02
CPCC12P5/023Y02E50/30
Inventor 钟潜学
Owner ANHUI MEINI PAPER IND
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