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Method for treating easily-degradable organic waste in two-phase hydrogen-production methane-production coupling reaction

A technology of organic waste and coupled reaction, applied in the direction of waste fuel, fermentation, etc., can solve the problems of no patent report, difficulty in achieving balance of production capacity, low calorific value, etc., to improve degradability and anaerobic digestion potential, The effect of promoting hydrolysis and acidification efficiency and reducing the content of CO2

Inactive Publication Date: 2012-11-28
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on anaerobic biogas production from easily degradable organic wastes is focused on traditional single-phase and two-phase anaerobic digestion, because such wastes have high moisture content, complex composition, large volume, heterogeneity, poor fluidity, fiber The traditional single-phase mixed anaerobic digestion system has low treatment efficiency, while the two-phase anaerobic digestion system realizes two-phase separation under certain conditions, and at the same time greatly improves the treatment efficiency of organic waste, and can realize hydrogen, methane joint production
However, due to the small amount of hydrogen produced in the first phase and its own low calorific value, it is difficult to really apply it; if the acidification phase reaction is strengthened, increasing the hydrogen production in the acidification reaction will cause the biomass to be in the first phase. Excessive consumption within the system will affect the subsequent methane production, making it difficult to achieve capacity balance
At present, there is no patent report on the coupling reaction of two-phase hydrogen production and methane production

Method used

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  • Method for treating easily-degradable organic waste in two-phase hydrogen-production methane-production coupling reaction

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with specific embodiments.

[0013] The system includes a raw material stirring system, a 5L hydrolysis acidification reactor, a 2L methanation reactor, and a pressure swing adsorption decarbonization device. Add inoculated sludge with a concentration of 25000mg / L and pass in a certain amount of oxygen to maintain a dissolved oxygen concentration of 0.3mg / L for microaerobic pretreatment and acidification. Add NaOH to the acidified liquid-solid phase product to adjust the pH to 7.0. Enter the high-efficiency methane production process through continuous feeding, and at the same time pass the acidified gas into the decarburization unit for purification, and the purified H 2 After entering the methanation reactor with CO 2 A reduction reaction occurs to produce methane. At the same time, the constant flow peristaltic pump is used to realize the recirculation of the effluent of the methanation react...

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Abstract

The invention discloses a method for treating easily-degradable organic waste in a two-phase hydrogen-production methane-production coupling reaction, and belongs to the field of efficient resource utilization of organic solid wastes. In the existing two-phase technology, the end product is only methane, and hydrogen is directly discharged; and the partial hydrogen-methane coproducing technology is difficult to apply because the yield of hydrogen is low. According to the invention, the easily-degradable organic waste is stirred and then added into an acidifying reactor; solid and liquid phases in reaction products directly enter into a rear end to produce a methane phase; a gas phase is subjected to pressure swing adsorption to decarburize; and a product gas the main component of which is H2 is introduced into the methane phase to react with CO2 which is produced by methanation reaction to generate CH4. By using the method, on one hand, the yield of CH4 is improved, and on the other hand, the purity of CH4 in the product gas is improved. The method disclosed by the invention has the advantages of high treatment efficiency, high gas producing rate, short period, no discharged waste water and the like, and can be used for continuously and stably producing the gas.

Description

Technical field [0001] The invention belongs to the field of efficient resource utilization of organic solid waste, and relates to a method for treating easily degradable organic waste by utilizing a two-phase hydrogen production and methane production coupling technology. Background technique [0002] Easily degradable organic waste refers to the perishable and easily biodegradable waste generated in the life and production process, mainly including fruit and vegetable waste, kitchen waste, etc. With the general improvement of the people's living standards in our country, the proportion of this type of organic matter in the absolute output and the total waste output has increased significantly. In 2007, the annual output of food waste in my country exceeded 80 million tons, and the output of fruit and vegetable waste exceeded 50 million tons. The most important feature of easily degradable organic waste is that it has high moisture content and organic content, and is easy to de...

Claims

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Application Information

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IPC IPC(8): C12P5/02C12P3/00
CPCY02E50/343Y02E50/30
Inventor 刘广青冯璐何艳峰刘晓英郑毅
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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