New Compact Biodigester Model for Organic Waste Treatment in Urban Residences and Buildings

AbstractA biodigester consists of a closed chamber to anaerobically digest biomass into biogas and biofertilizer, and is an efficient alternative for organic waste treatment and energy generation. The new interest in decentralizing waste treatment and the restricted space of urban centers makes comp...

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Bibliographic Details
Published in:	Journal of environmental engineering (New York, N.Y.) Vol. 147; no. 2
Main Authors:	de Araújo, Vinícius Oliveira, Silva, Fernando Almeida Tavares, Marotta, Humberto, Madeira, Jonni Guiller Ferreira, Rodrigues, Carla Aparecida Florentino, do Carmo, Dirlane de Fátima, Fiaux, Sorele Batista
Format:	Journal Article
Language:	English
Published:	New York American Society of Civil Engineers 01-02-2021
Subjects:	Biofertilizers Biogas Design of experiments Digesters Experimental design Inoculum Methane Organic waste treatment Organic wastes Sustainability Technical Papers Urban areas Urban environments Waste treatment
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Summary:	AbstractA biodigester consists of a closed chamber to anaerobically digest biomass into biogas and biofertilizer, and is an efficient alternative for organic waste treatment and energy generation. The new interest in decentralizing waste treatment and the restricted space of urban centers makes compact biodigesters a feasible alternative for sustainable cities. This paper presents the compact and low-cost Hexagonal Methane Collector biodigester and its operational capacity to produce biogas. The factorial experimental design results indicate that the volume of inoculum and mixture inside the reactor are important in controlling biogas yield, but the volume of water is not. The findings indicate that this novel biodigester technology has a practical operational mode based on a batch dry system. The space-saving hexagonal shape and the flexible design, which can serve a variable number of people in small places are other advantages of Hexagonal Methane Collector compared with available models. Therefore, this concept of biodigester could be an important tool to integrate organic waste treatment and energy sustainability goals in increasingly populated urban centers.
ISSN:	0733-9372 1943-7870
DOI:	10.1061/(ASCE)EE.1943-7870.0001849