%0 Journal Article
%T Anaerobic co-digestion of crude glycerin and starch industry effluent Codigest o anaer¨®bia de glicerina bruta e efluente de fecularia
%A Andrea C. Larsen
%A Benedito M. Gomes
%A Simone D. Gomes
%A Dilcemara C. Zenatti
%J Engenharia Agr¨ªcola
%D 2013
%I Sociedade Brasileira de Engenharia Agr¨ªcola
%X The Brazil's Biodiesel Production and Use Program introduces biodiesel in the Brazilian energy matrix, bringing along the perspective of a growth of the glycerin offer, co-product generated in the proportion of 10 kg for each 100 L of biodiesel. The aim of this study was to evaluate the addition of crude glycerin in the anaerobic digestion of cassava starch industry effluent (cassava wastewater), in a horizontal semi-continuous flow reactor of one phase in laboratory scale. It was used a reactor with a 8.77 L of useful volume, a medium support for corrugated conduit of polyvinyl chloride (PVC), temperature of 261 oC, fed with cassava wastewater and glycerin, with hydraulic detention times of 4 and 5 days and increasing volumetric organic load of 3.05; 9.32; 14.83 and 13.59 g COD L-1 d-1, obtained with the addition of glycerin at 0; 2; 3 and 2% (v/v), respectively. The average removal efficiencies of TS and TVS were decreasing from the addition of glycerin to the cassava wastewater, averaging 81.19 to 55.58% for TS and 90.21 to 61.45% for TVS. The addition of glycerin at 2% increased the biogas production compared to the control treatment, reaching 1.979 L L-1 d-1. The biogas production as a function of the consumed COD was higher for the control treatment than for the treatments with addition of glycerin, which indicates lower conversion of organic matter into biogas. O Programa Nacional de Produ  o e Uso do Biodiesel introduziu o biodiesel na matriz energ¨¦tica brasileira, trazendo a perspectiva de aumento da oferta de glicerina, coproduto gerado na propor  o de 10 kg para cada 100 L de biodiesel. O objetivo principal deste trabalho foi avaliar a adi  o de glicerina bruta na digest o anaer¨®bia de efluente de ind¨²stria de f¨¦cula de mandioca (manipueira), em reator de fluxo semicont¨ªnuo horizontal de uma fase, em escala de laborat¨®rio. Foi utilizado um reator com volume ¨²til de 8,77 L, meio suporte em eletroduto corrugado de policloreto de vinila (PVC), temperatura de 261 oC, alimentado com manipueira e glicerina, aplicando-se tempos de deten  o hidr¨¢ulica de 4 e 5, dias e cargas organicas volum¨¦tricas crescentes de 3,05; 9,32; 14,83 e 13,59 g COD L-1 d-1, obtidas com a adi  o de glicerina aos n¨ªveis de 0; 2; 3 e 2% (v/v), respectivamente. As efici¨ºncias de remo  o m¨¦dia de ST e STV foram decrescendo a partir da adi  o de glicerina ¨¤ manipueira, com m¨¦dias de 81,19 a 55,58 % para ST e 90,21 a 61,45% para STV. A adi  o de glicerina em 2% aumentou a produ  o de biog¨¢s em rela  o ao tratamento-controle, chegando a 1,979 L L-1 d-1. A produ  o de biog¨¢s em fun
%K manipueira
%K biodiesel
%K biog¨¢s
%K glicerol
%K cassava wastewater
%K biodiesel
%K biogas
%K glycerol
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200013