Cassava starch extraction effluent treatment in a one phase tubular horizontal pilot reactor with support medium

Kuczman, Osvaldo; Tavares, Maria Hermínia Ferreira; Gomes, Simone Damasceno; Guedes, Luciana Pagliosa Carvalho; Grisotti, Geovane

doi:10.1590/s0100-69162014000600021

Cited by 11 publications

(15 citation statements)

References 13 publications

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“…Both the highest and lowest TVSr values took place respectively at the highest and lowest system temperatures; therefore, it is strong indication that temperature may significantly influence the TVSr process. KUCZMAN et al (2014) evaluated cassava processing wastewater treatment by a pilot horizontal tubular anaerobic reactor filled with bamboo pieces, and registered a 75.56% removal of volatile solids for an HRT of 13 days, being higher than those found in the present study. These results are related to the use of a support medium in the anaerobic reactor, which increases the contact area of microorganisms with wastewater, providing greater microbial biomass activity and growth (ADU-GYAMFI et al, 2012).…”

Section: Cod and Tvsr Removalscontrasting

confidence: 62%

“…Biogas production and characterization Table 5 represents the biogas production for the different experimental conditions of the CCRD. For 35 °C and 10.0% TVSi, production was 0.317 LN biogas per g COD removed, being near that of 0.368 LN biogas per g COD removed (13 days HRT), found by KUCZMAN et al (2014).…”

Section: Cod and Tvsr Removalsmentioning

confidence: 74%

“…One of the possibilities is the use of anaerobic biodigestion (FERRAZ et al, 2009;KUCZMAN et al, 2014;INTANOO et al, 2014) which, according to MIRANDA et al (2012), is an effective technique and has the major advantage of being a biogas plant, being a high-energy power generation system. The anaerobic biodigestion consists of an ecosystem in which different groups of microorganisms, under stringent conditions of oxygen, work interactively converting complex organic matter into methane (CH4), carbon dioxide (CO2), water, hydrogen sulfide (H2S), ammonia (NH3 + ), and new bacterial cells (KPATA-KONAN et al, 2013;SCHIRMER et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The anaerobic biodigestion may be used for treating wastewater from cassava starch production, in order to control several environmental factors of interest during the process (KPATA- KONAN et al, 2013;KULLAVANIJAYA & THONGDUANG, 2012;KUNZLER et al, 2013;KUCZMAN et al, 2014). According to ZENG et al (2010), in the case of a batch process and based on volatile solids, a proper inoculum/substrate ratio (ISR) is a key factor for anaerobic digestion, increasing the efficiency of treatment.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Anaerobic Treatment of Cassava Processing Wastewater

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ABSTRACT:The main contribution of this research is to optimize the operating conditions of an anaerobic reactor applied to the treatment of wastewater from cassava starch production. A 20-L anaerobic reactor was used, operating in a batch system, with temperature control. Temperature and inoculum total volatile solids (TVSi) were controlled for evaluation of effects on the removals of chemical oxygen demand (COD) and reactor total volatile solids (TVSr) by means of a Central Composite Rotational Design (CCRD). Twelve trials were analyzed simultaneously by the desirable function approach. The higher COD removal (96.82%) was obtained at 42 °C and 12.0% TVSi. The largest TVSr removal (69.31%) was registered at 45 °C and 10.0% TVSi. Equations representative of the process were obtained from the responses of variables, being statistically significant at a 90% confidence level. Based on the desirability function approach, we can conclude that an optimal operational condition for the anaerobic reactor is at 39.7 °C and 10.8% TVSi. The estimated COD and TVSr removal efficiencies under these operating conditions were 90.45% and 63.12%, respectively.

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Section: Cod and Tvsr Removalscontrasting

confidence: 62%

Section: Cod and Tvsr Removalsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization of Anaerobic Treatment of Cassava Processing Wastewater

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“…Using the same substrate, Kunzler et al (2013) tested the methane production, in horizontal reactors, with different diameter:length ratios, containing bamboo support mean, and varying the values of organic loading rates. Larsen et al (2013), using this same reactor configuration, obtained an increase in the volu metric biogas production with the addition of glycerin to the wastewater fro m the starch extraction; Kuczman et al (2014Kuczman et al ( , 2016 evaluated the biogas production and methane yield in a p ilot scale reactor with packed-bed of bamboo stalks and biogas recircu lation inside the reactor.…”

Section: Introductionmentioning

confidence: 99%

Methane Production From Cassava Starch Wastewater in Packed-Bed Reactor and Continuous Flow

et al. 2018

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The aim of this study was to evaluate the behavior of an anaerobic reactor of packed-bed and continuous flow, in relation to the biogas and methane production and the removal of organic load, from the wastewater of cassava starch extraction. For this purpose, were tested, in a reactor with a useful volume of 2.82 L and support mean of polypropylene filled with polyethylene foam, the organic loading rate (OLR) of 2.5, 5.0, 8.0 and 10.0 g L -1 d -1 . It was evaluated the removal of COD, the pH, the VA/TA ratio, the biogas and the methane production. It was concluded from this study that it is possible to produce biogas with methane percentages higher than 80% (maximum) and remove the organic load more than 90% under the tested conditions. In relation to stability, the reactor can be considered stable for the parameters, pH, the relationship between volatile acidity and total alkalinity and organic load removal. The best results in relation to the average volumetric biogas production (0.174 and 0.311 L g COD -1 ) were obtained for the higher organic loading rate (of 8 and 10 g L -1 d -1 , respectively) and the observed tendency is that with the increase of the organic loading rate, the specific biogas production will increase as well as the specific production of methane.

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Viability of rapid startup and operation of UASB reactors for the treatment of cassava wastewater in the semi‐arid region of northeastern Brazil

et al. 2017

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The production of cassava flour generates wastewater with a high concentration of organic matter and nutrients, which gives this effluent potential as a source of both bioenergy and pollution. Thus, cassava wastewater needs to be properly treated prior to release into the environment. Different treatment processes are employed for this purpose, but studies involving up‐flow anaerobic sludge blanket (UASB) reactors without modifications are scarce due to the rapid acidification of cassava wastewater. Thus, the aim of the present study was to evaluate the rapid startup of UASB reactors at 30 °C for the cassava wastewater treatment. The reactor was operated under eight different conditions with a hydraulic retention time (HRT) of 8 or 12 h and organic loading rates (OLR) of 12.0 or 15.5 g COD · L−1 · d−1. The systems were evaluated based on chemical oxygen demand (COD) removal, the production of methane, and the stability of the volatile fatty acids/total alkalinity ratio. The UASB system with the best performance was that with the 8 h HRT and OLR of 12.0 g COD · L−1 · d−1, with COD removal rates ranging from 71 to 80 % and methane production of 0.260 L CH4 · g −1 CODremoved. The system offers a real‐scale prospect and is a promising option for the replacement of firewood in cassava flour toasting ovens, thereby contributing to the preservation of the semi‐arid Caatinga biome in northeastern Brazil.

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Cassava starch extraction effluent treatment in a one phase tubular horizontal pilot reactor with support medium

Cited by 11 publications

References 13 publications

Optimization of Anaerobic Treatment of Cassava Processing Wastewater

Optimization of Anaerobic Treatment of Cassava Processing Wastewater

Methane Production From Cassava Starch Wastewater in Packed-Bed Reactor and Continuous Flow

Viability of rapid startup and operation of UASB reactors for the treatment of cassava wastewater in the semi‐arid region of northeastern Brazil

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