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Method for improving anaerobic digestion performance of biomass wastes by biological phase separation and optimization technology

A biomass waste and anaerobic digestion technology, which is applied in the field of solid waste treatment and resource utilization, can solve problems such as unresolved start-up technology and phase separation optimization technology, hindering the industrialization of two-phase anaerobic digestion technology, and achieve reduction Small reactor volume, good system stability, and the effect of improving conversion efficiency

Active Publication Date: 2014-01-22
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

However, the start-up technology and phase separation optimization technology of this process have not been solved, which hinders the industrialization of two-phase anaerobic digestion technology

Method used

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  • Method for improving anaerobic digestion performance of biomass wastes by biological phase separation and optimization technology

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Embodiment 1

[0025] A method for improving the biogas yield of anaerobic digestion of biomass waste through biological phase separation optimization technology, comprising the following process steps:

[0026] 1. Raw material pretreatment: use a pulverizer and a juicer to crush the fruit and vegetable waste into a slurry, and realize solid-liquid separation. The screen aperture of the juicer is 1mm, the extrusion force is 300-600N, and the total juice volume is b ;

[0027] 2. Start-up and operation of the acidification phase: the acidification phase reactor adopts a complete mixing anaerobic fermentation reaction device (CSTR), the effective working volume is 5L, the reaction temperature is controlled at 35±1°C, and the stirring intensity is 120r·min -1 , stirring for 5min every 3h. The acidification phase starts with an organic load of 20gvs·L -1 , F / M=2, after 4 days of batch reaction, when the pH value of the system is stabilized in the range of 4.5 to 5.5, H 2 The content is around...

Embodiment 2

[0031] Embodiment 2: the specific implementation method is as follows:

[0032] A method for improving the biogas yield of anaerobic digestion of biomass waste through biological phase separation optimization technology, comprising the following process steps:

[0033] 1. Raw material pretreatment: crush fruit and vegetable waste into pulp with a shredder and a juicer, and realize solid-liquid separation. The screen aperture of the juicer is 1mm, and the extrusion force is 300-600N;

[0034] 2. Start-up and operation of the acidification phase: the acidification phase reactor adopts a complete mixing anaerobic fermentation reactor (CSTR), the effective working volume is 5L, the reaction temperature is controlled at 35±1°C, and the stirring intensity is 120r·min -1 , stirring for 5min every 3h. The acidification phase starts with an organic load of 20gvs·L -1 , F / M=2.5, after 3 days of batch reaction, when the pH value of the system is stabilized in the range of 4.5 to 5.5, H...

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Abstract

The invention discloses a method for improving the anaerobic digestion performance of biomass wastes by a biological phase separation and optimization technology and belongs to the technical field of treatment and recycling of the solid wastes. The technology is characterized in that: solid residue and liquid of materials are subjected to anaerobic digestion under different conditions, a liquid phase enters a methane production reactor directly, solid matter enters an acidification reactor, acidification phase starting optimization of two-phase anaerobic digestion is performed, and then a product enters the methane production reactor, and mass distribution of acidification and methanation phases is optimized, so the coupled linkage of the acidification phase and the methanation production phase is realized, different material components can be fully degraded, and the pH buffering capacity of a microorganism system can be improved; and therefore, the material inlet load of the whole system can improved, the volume of the reactor is reduced, treatment cost is reduced, and the conversion rate of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and relates to a method for improving the efficiency of anaerobic digestion of biomass through a biological phase separation optimization technology. Background technique [0002] Energy conservation, environmental protection and effective utilization of resources are the two major themes of social and economic development in the world today. With the increase of population, the adjustment of rural industrial structure and the continuous improvement of residents' living standards, the output and consumption of agricultural products are also increasing. Taking 2009 as an example, China's fruit and vegetable planting area and output accounted for 43% and 49% of the world's respectively, ranking first in the world. At the same time, the proportion of fruits and vegetables in the residents' diet is increasing, and the waste generated in the process of harvestin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02
CPCY02E50/343Y02E50/30
Inventor 李秀金蔡文婷朱保宁袁海荣邹德勋刘研萍
Owner BEIJING UNIV OF CHEM TECH
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