Evaluation of Hydraulic Retention Time on Treatment of Coffee Processing Wastewater (CPWW) in EGSB Bioreactor

Cruz-Salomón, Abumalé; Ríos-Valdovinos, E.; Pola-Albores, F.; Lagunas‐Rivera, Selene; Meza‐Gordillo, Rocío

doi:10.3390/su10010083

Cited by 24 publications

(19 citation statements)

References 15 publications

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“…Expanded granular sludge bed (EGSB) bioreactor Several anaerobic processes have been developed and studied to treat CPWW, such as studies on the flow pattern, toxicity inhibition, start-up, optimization, kinetics and operation conditions. The hydraulic retention time (HRT) is one of the most important independent variables for the control of this kind of anaerobic bioreactor, because it directly influences the anaerobic digestion processes and the hydrogen transfer and can produce the cell washing phenomenon (Cruz-Salomón et al 2017).…”

Section: Biological Methodsmentioning

confidence: 99%

“…Therefore, it is necessary to monitor the content of VFA for the good performance of the anaerobic bioreactor. Therefore, it is necessary to monitor the content of VFA for the good performance of the anaerobic bioreactor as well as Hydraulic retention time (HRT) because these factors affect EGSB bioreactor performance (Cruz-Salomón et al 2017).…”

Section: Biological Methodsmentioning

confidence: 99%

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Coffee processing wastewater treatment: a critical review on current treatment technologies with a proposed alternative

2019

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Coffee is globally the second largest most traded commodity after petroleum, and this has facilitated many countries to grow and produce coffee in commercial quantity. The production processes uses large volume of water which comes out as contaminated water. The presence of toxic chemicals like tannins, phenolic and alkaloids inhibits biological degradation. Microbial processes break down the organic substances released into water bodies slowly, using up the oxygen from the water (COD). As demand for oxygen needed to break down organic waste in a wastewater begins to exceed supply, a decrease in oxygen needed to combine with chemicals (COD) slowly creates anaerobic condition. The review looks at few of the current methods (physicochemical and biological) used in coffee wastewater management, their advantages and disadvantages including, high cost implication, complex operation and more time consumption among others; furthermore, the review suggests ion exchange technique as a better alternative based on its capacity to act as both an ion exchanger and absorber.

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Section: Biological Methodsmentioning

confidence: 99%

Section: Biological Methodsmentioning

confidence: 99%

Coffee processing wastewater treatment: a critical review on current treatment technologies with a proposed alternative

2019

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“…The efficiency (%) of the ARFB 1 -ARFB 2 system was calculated with the following Equation (1) [29].…”

Section: R Peer Review 5 Of 13mentioning

confidence: 99%

Novel Treatment of Sugar Mill Wastewater in a Coupled System of Aged Refuse Filled Bioreactors (ARFB): Full-Scale

et al. 2021

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Sugar is the most important food supplement of our daily diet. During the production, sugar mills use a large volume of water and produce a significant amount of wastewater polluted with high organic compounds. Therefore, it is necessary to treat the wastewater before their disposal. For this reason, this article presents the results obtained from the monitoring of a coupled system of aged refuse filled bioreactors (ARFB) in full scale to treat wastewater from a sugar mill. The coupled system consists of two bioreactors (a primary one -ARFB1- and a rectification one -ARFB2-) arranged in a series with identical geometries. The ARFB1-ARFB2 system was evaluated in two stages. The first stage (maintenance period) for 28 weeks, and second stage (Zafra season) for 29 weeks. The system was fed with sugar mill wastewater (SMW) with a chemical oxygen demand (COD) of 2787 ± 1552 mg/L and 2601 ± 722 mg/L, respectively. As results, we observed a rapid stabilization of the system over 2 months. In addition, we found the ARFB1-ARFB2 system achieved an average COD removal of 94.9%, with a final effluent (E2) concentration below the maximum permissible limits of Mexican and international regulations for all analyzed parameters. Finally, the results of this study show that the ARFB1-ARFB2 full-scale novel technology is an efficient process for removal of the main contaminants that affect the wastewater from the sugar mills.

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“…In ANSYS CFD-Post 20.1, data of velocity and time were collected on the streamline for each case. Hydraulic retention times (HRTs) have been calculated (Cruz-Salomón et al 2017). The objective was to find out for which operational configurations the velocities were lower, and the times on the streamlines and HRTs were higher.…”

Section: Design Of Experimentsmentioning

confidence: 99%

Evaluation of hydrodynamic behavior of biosand filters using computational fluid dynamics combined with the design of experiments

Sala

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Lautenschlager

2021

Journal of Hydroinformatics

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Biosand filters (BSFs) are widely used in rural and urban areas where access to drinking water is limited or non-existent. This study applies computational fluid dynamics in the assessment of hydrodynamic characteristics considering changes in the design of two BSF models to make construction options available to communities, without losing hydrodynamic efficiency. The commercial code ANSYS-CFX 20.1 together with a central composite design of experiments methodology to simulate the flow was used under different combinations of porosities, permeabilities, pipe diameters, and filter diameters and heights. These parameters were combined statistically from Statistica 13.3. Our results have shown that combining greater filter depths with smaller pipe diameters has played a key role in the BSF best performance, and the CAWST V10 model has performed better than HydrAid, with lower velocities and longer hydraulic retention times.

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Evaluation of Hydraulic Retention Time on Treatment of Coffee Processing Wastewater (CPWW) in EGSB Bioreactor

Cited by 24 publications

References 15 publications

Coffee processing wastewater treatment: a critical review on current treatment technologies with a proposed alternative

Coffee processing wastewater treatment: a critical review on current treatment technologies with a proposed alternative

Novel Treatment of Sugar Mill Wastewater in a Coupled System of Aged Refuse Filled Bioreactors (ARFB): Full-Scale

Evaluation of hydrodynamic behavior of biosand filters using computational fluid dynamics combined with the design of experiments

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