METHOD OF OBTAINING BIOGAS WITH EXTRACTION OF NUTRIENTS

摘要

The invention relates to a method of two-phase anaerobic digestion, in which monitoring and regulation of nitrogen status (molar ratio of carbon to nitrogen, i.e. the molar ratio C / N, or the content of total or ammonia nitrogen) allows to maintain optimal conditions during the process. The method improves the use of various raw materials or facilitates monodigirovanie feedstock of the same type. In particular, the method allows the use of nitrogen-enriched starting materials. The community of hydrolyzing and acidogenic microorganisms used in the first phase of the autoclave performs ammonification, i.e. release of organic nitrogen in the form of ammonia. Nitrogen and phosphorus are removed and removed from the product of enzymatic hydrolysis, which is then subjected to biogasification in the second phase of the process. Waste water after biogasification can be recycled to the process.