Anaerobic purification installation with production of biogas and liquid fertilizers

摘要

This paper presents the results of an experimental study regarding the conception of a new constructive solution that does not consume energy from external sources. The installation presented in the paper allows for the purification of animal and bird wastes, respectively the transformation of polluting volatile organic substances into two usable categories: a combustible gas (biogas) and a natural liquid fertilizer that can be applied to farmlands. The advantages of the proposed solution are: self-regulated consumption is small, respectively 15-20 % of the total production of combustible gases, the space it requires is small, there are no moving parts (pumps, blowers, mechanical agitators), which make for an increases viability, little manual labour for exploitation and maintenance. The electrical energy consumption is only for lighting and feeding raw materials (wastes) to the bioreactor. At the same time, efficiency is high due to the possibility to heat the wastes that are fed to the installation using a heat exchange gauge, using the heat emitted by the waste liquid fertilizer. The solution presented is an alternative in the use of classic combustibles in the global context of the decrease in combustible reserves and continuous increase of prices of combustibles and fertilizers.