Anaerobic treatment of organic solid waste with high and low concentrations of solids

Revista Brasileira de Engenharia Agrícola e Ambiental

Lopes, Wilton S.³  Prasad, Shiva²  Silva, Salomão A.¹  Sousa, José T. de³  Leite, Valderi D.³ 

[1] UFCG;UFCG, Campina Grande;UEPB, Campina Grande

关键词: sewage sludge;    vegetable waste;    batch reactor;    compartmented reactor    INTRODUÇÃO Durante o processo de biodecomposição de matéria orgânica a presença de água favorece a condução de enzimas e de outros metabólitos microbianos contribuindo;    dessa forma;    para o metabolismo dos microrganismos destacando-se;    predominantemente;    como fator de grande importância na otimização da relação custo/benefício dos processos de tratamento de resíduos sólidos orgânicos;   

DOI  :  10.1590/S1415-43662009000200013

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

In this study the anaerobic treatment of organic solid waste with high and low concentrations of solids was studied. The experimental system comprised of two reactors, with unitary capacity of 2,200 L, while the used substrate was composed of solid vegetable waste and sludge. One of the reactors was loaded with substrate containing 20% of total solids and the other with only 5% of total solids on weight basis. It was verified that, for the substrate containing 5% of total solids, the retention time of solids required for 80% reduction of the applied COD mass was 90 days, during which the methane gas production rate was of 0.25 Nm3 kg-1 CODApplied; whereas in the substrate containing 20% of total solids, the retention time of solids required for biostabilization of 80% of the mass of applied COD was 270 days, with a methane gas production rate of 0.1 Nm3 CH4 kg-1 CODApplied.

【 授权许可】

CC BY-NC