Method for generating biogas by anaerobic fermentation of vegetable straws with high content of lignocellulose

Abstract

The invention relates to a method for generating biogas by anaerobic fermentation of vegetable straws with high content of lignocellulose. The method comprises the following steps: after crushing vegetable straws, adding catalysts A and B for pretreatment; mixing the pretreated vegetable straws with fresh cow manure and / or pig manure; adding active sludge as an inoculum; adjusting the pH value to 7.2-8.0; putting into an anaerobic reactor; and carrying out anaerobic fermentation at 30-37 DEG C. Reductive and harmless utilization of vegetable straw wastes can be effectively achieved by resource utilization of the vegetable straws and cow manure, so that the environmental damage is greatly reduced, and meanwhile, the generated biogas, biogas residues and biogas slurry are of relatively high economic values. The method is higher in fermentation starting speed, is hardly acidified in system and is more stable in fermentation process. Compared with single raw material fermentation of cow manure, the gas yielding hold time is lasting, the total gas yield is high, and the comprehensive cost is low.

Description

technical field

[0001] The invention relates to a method for energy utilization of planting and animal husbandry by-products, in particular to a method for producing biogas by anaerobic fermentation of vegetable stalks with high lignocellulose content, and belongs to the field of biogas technology. Background technique

[0002] With the rapid development of my country's social economy, the level of agricultural modernization is increasing day by day, and various characteristic breeding and planting industries are booming all over the country, which not only enriches the ever-expanding market demand, but also greatly drives the increase in the income level of farmers. Agriculture and animal husbandry such as vegetable planting, beef cattle, and dairy cattle breeding have formed a relatively complete industrial structure in some provinces and cities, forming a comprehensive system from planting and raising to post-production primary processing, product deep processing, high val...