Processing of poultry farm waste by microbial conversion

Abstract

The article presents the results of an analysis of modern research in the field of organic waste processing. To solve the problem, anaerobic bioconversion method was chosen. The data of experimental laboratory experiments on the selection of a consortium of microorganisms’ methanizing waste from poultry farms with maximum efficiency are presented.

A Review of Poultry Waste-to-Wealth: Technological Progress, Modeling and Simulation Studies, and Economic- Environmental and Social Sustainability

“…Anaerobic digestion is the process in which organic matter is decomposed by microorganisms into biogas, the mixture of CH 4 , CO 2 , H 2 O, and H 2 S, which is also known as biogas, and some other solid and liquid organic residuals, under thermophilic or mesophilic conditions with the absence of oxygen [86,87]. Anaerobic digestion and decomposition with mixed cultures of microorganisms can contribute greatly to the destruction of organic matter in poultry litter and manure [88].…”

“…Anaerobic digestion and decomposition with mixed cultures of microorganisms can contribute greatly to the destruction of organic matter in poultry litter and manure [88]. As a well-developed or quite mature technology, it can convert poultry wastes into biogas without too many pre-treatment procedures [74], and it can be used as an alternative source of energy and a fermentation sludge that can be used as fertilizer [87]. Anaerobic digestion has a long history of more than 100 years of being used to produce biogas from biomasses such as agricultural residuals, food wastes, sewage sludge, industrial and municipal waste, and even human and animal manure, which can be used for cooking, lighting, heating and even generating electricity [89,90].…”

“…In order to increase biogas yields during anaerobic digestion, a modern and popular method is the joint processing of organic wastes from different feedstocks, which is also known as co-digestion, by adding various ingredients to the feedstock substrate [87]. An experimental study showed that the biogas output from poultry waste can be increased by 47% based on a standard case when using the plant supplement from the Amaranthaceae family [96].…”

“…In fact, the performance of the anaerobic digestion of poultry litter and manure can be improved by various methods. For instance, the application of an improved anaerobic reactor or digester design or the pre-treatment of raw materials can speed up the decomposition of organic matter, and pre-treatment methods like grinding, hydrolysis, enzymatic, hightemperature hydrolysis, and treatment with acidic or alkaline agents have been proved to be effective [87]. Awasthi et al (2016) investigated the co-digestion of gelatin industry sludge, the organic fraction of municipal solid waste, and poultry waste, and found that when these feedstocks are mixed in a ratio of 6:1:0.5, and then combined with 10% zeolite mixed with enriched nitrifying bacteria consortium, the maximum value-added products (nutrients) can be generated [97].…”