Tratamento de águas residuárias de fecularia por meio de lagoas de estabilização

Campos, Alessandro Torres; Daga, Jacir; Rodrigues, Emanuel E.; Franzener, Gilmar; Suguiy, Mary M. T.; Syperreck, Vera Lucia Greco

doi:10.1590/s0100-69162006000100026

Cited by 16 publications

(12 citation statements)

References 1 publication

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“…The variation of organic loading rate from 15 to 35 g.L -1 .d -1 occurred due to the difference in the composition of the cassava-processing wastewater, which was used without any dilutions. This variability is closely related to the origin of the cassava plant, age of the tubercle, storage period and to the type of process used (CAMPOS et al, 2006). Samples of the reactor effluent were characterized by determining total sugars concentrations with a colorimetric method (DUBOIS et al 1956); Chemical Oxygen Demand (COD), pH and volatile suspended solids (VSS), according to the Standards Methods for the Examination of Water and Wastewater (APHA, 2005).…”

Section: Methodsmentioning

confidence: 99%

Hydrogen production from cassava processing wastewater in an anaerobic fixed bed reactor with bamboo as a support material

Andreani

Torres

Schultz³

et al. 2015

Eng. Agríc.

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Attempting to associate waste treatment to the production of clean and renewable energy, this research sought to evaluate the biological production of hydrogen using wastewater from the cassava starch treatment industry, generated during the processes of extraction and purification of starch. This experiment was carried out in a continuous anaerobic reactor with a working volume of 3L, with bamboo stems as the support medium. The system was operated at a temperature of 36°C, an initial pH of 6.0 and under variations of organic load. The highest rate of hydrogen production, of 1.1 L.d-1.L-1, was obtained with application of an organic loading rate of 35 g.L-1.d-1, in terms of total sugar content and hydraulic retention time of 3h, with a prevalence of butyric and acetic acids as final products of the fermentation process. Low C/N ratios contributed to the excessive growth of the biomass, causing a reduction of up to 35% in hydrogen production, low percentages of H2 and high concentrations of CO2in the biogas.

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Section: Methodsmentioning

confidence: 99%

Hydrogen production from cassava processing wastewater in an anaerobic fixed bed reactor with bamboo as a support material

Andreani

Torres

Schultz³

et al. 2015

Eng. Agríc.

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“…Com perspectivas de crescimento em todo o mundo (ZISKA et al, 2009), o segmento industrial da mandioca opera processos geradores de subprodutos com elevadas cargas orgânicas e grandes vazões (CAMPOS et al, 2006). COLIN et al (2007) afirmam que diversas fecularias na Colômbia geram em média 11.000 L de água residuária para processar 1 t de mandioca, poluindo o equivalente a 300 a 450 pessoas por dia.…”

Section: Introductionunclassified

Produção específica de biogás a partir de manipueira em reator de fase única

et al. 2011

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RESUMO:O presente artigo mostra um estudo sobre a produção de biogás a partir de manipueira, considerando o volume de um reator de fluxo tubular horizontal de fase única. O objetivo do trabalho foi avaliar a produção de biogás aumentando-se as cargas orgânicas e os volumes de alimentação, o que resultou em redução do tempo de retenção hidráulica (TRH). O reator foi alimentado continuamente, com cargas orgânicas de 1,18; 1,28; 1,57 e 2,68 g DQO L -1 rd -1 (gramas de demanda química de oxigênio por litro de reator por dia) em TRHs de 15; 13,0; 8,3; 6,6 dias, respectivamente. As produções de biogás foram de 0,52; 0,41; 0,65 e 0,63 L L -1 rd -1 , destacando-se que o primeiro TRH avaliado foi o de 13 dias, seguido de 8,3; 6,6 e 15 dias. Do estudo, concluiu-se que, com a diminuição do TRH, ocorre maior produção de biogás por volume de reator. Consequentemente, através da utilização do TRH adequado, pode-se aproveitar melhor o volume do reator, fato que resultará em economia na implantação da tecnologia em indústrias processadoras de mandioca. PALAVRAS-CHAVE:água residuária, digestão anaeróbia, fecularia, mandioca, metano. SPECIFIC BIOGAS PRODUCTION FROM MANIPUEIRA AT ONE-PHASE REACTORABSTRACT: This article presents a study on biogas production from wastewater cassava considering the volume of a one-phase horizontal tubular flow reactor. The objective was to evaluate the biogas production, enlarging the organic loadings and feeding volums, resulting in minor hydraulic retention times (HRT). The reactor was continuously fed with organic charges corresponding to 1.18; 1.28; 1.57 and 2.68 g COD L -1 r d -1 (grams of oxygen chemical demand per liter of reactor per day), resulting in hydraulic retention times 15; 13; 8.3 and 6.6 days. The correspondent specific biogas productions were, respectively, 0.52; 0.41; 0.65 and 0.63 L L -1 rd -1 , emphasizing that the 13-day was the first HRT rated, followed by 8.3, 6.6 and 15 days. It was concluded that with the HRT decrease occurred larger biogas production per reactor volume. Therefore, with the correct selection for HRT, it is possible to make the best of the reactor volume, resulting in economy at the technology implantation in cassava starch industries.

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“…The cassava wastewater has high content of mineral nutrients and organic compounds and the cyanogenic glycoside linamarin, a source of hydrocyanic acid, which can cause serious environmental problems when improperly disposed, such as reduction of dissolved oxygen and eutrophication of water bodies, death of aquatic fauna and terrestrial animals that consume water with excess hydrocyanic gas, and imbalance of soil nutrients (Campos et al, 2006). However, despite the environmental risks when the cassava wastewater is improperly disposed in the environment, several authors consider its reused as thickener for the pharmaceutical industry (AntonioCisneiros & Elizalde-Gonzalez, 2010) and as nematicide (Nasu et al, 2010) and bio-fertilizer for agricultural soils (Fioretto, 1987).…”

Section: Introductionmentioning

confidence: 99%

Production and morphological components of sunflower on soil fertilized with cassava wastewater

et al. 2017

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Tratamento de águas residuárias de fecularia por meio de lagoas de estabilização

Cited by 16 publications

References 1 publication

Hydrogen production from cassava processing wastewater in an anaerobic fixed bed reactor with bamboo as a support material

Hydrogen production from cassava processing wastewater in an anaerobic fixed bed reactor with bamboo as a support material

Produção específica de biogás a partir de manipueira em reator de fase única

Production and morphological components of sunflower on soil fertilized with cassava wastewater

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