Resources comprehensive treatment technology for organic waste material

Abstract

A process for reclaiming the organic waste includes such steps as mixing it with hot water, pulverizing, removing impurities to obtain a suspended substance at 36-37 deg.C, wet-type anaerobic fermenting for 15-20 days to obtain humus and marsh gas, using humus to prepare fertilizer, and using marsh to generate electricity.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a comprehensive treatment of organic waste (organic domestic waste, kitchen waste, food industry leftovers, organic sludge, livestock manure, etc.) that is harmless, reduced, and resourced craft. Background technique [0002] Pollutants such as organic domestic waste, kitchen waste, food processing industry waste, organic sludge, and livestock and poultry manure all have the common characteristics of high organic matter content and biodegradability, and are collectively referred to as biodegradable organic waste. [0003] Treating organic waste with anaerobic fermentation is an effective way to recover energy from organic waste. At present, there are many studies on anaerobic fermentation of organic waste at home and abroad. The main methods used are wet anaerobic fermentation and dry anaerobic fermentation. Oxygen fermentation is divided into two-ste...

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Problems solved by technology

These methods generally treat the above-mentioned organic wastes separately. Since the most important factor affecting the fermentation of organic matter is C / N (carbon-to-nitrogen ratio), the C / N ratios of various organic wastes vary greatly, and some are high. Some of them are low, resulting in different degrees of degradation when this type of organic waste is treated separately, resulting in a large difference in biogas production rate; at the same time, in order to achieve the concentration required for fermentation and to stabilize and maximize the biogas production rate, some organic wastes A certain amount of water needs to be added to waste, such as dry solid organic matter such as kitchen waste and organic domestic waste, while other organic waste needs to be dehydrated first to reach the required concentration, such as liquid organic waste such as livestock and poultry manure, etc. , some need to adjust their C / N ratio

Another important factor affecting the fermentation effect is the particle size, impurity content, mixing degree of the suspension, temperature, etc. In these methods, most of the fermentation materials have not undergone effective pretreatment, particle size, impurity content, mixing degree Failure to achieve the best reaction state, resulting in generally low biogas production rate of organic materials

The biogas residue produced by fermentation has more impurities, and the quality of the fertilizer produced is difficult to be accepted by customers, which is easy to cause secondary pollution

The degree of automation of the fermentation device is low, and it is difficult to form a continuous production capacity, so the processing scale is generally small

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