Treatment of 3,4,5-trimethoxybenzaldehyde and Di-bromo-aldehyde manufacturing wastewater by the coupled Fenton pretreatment and UASB reactor with emphasis on optimization and chemicals analysis

Li, Wei cheng; Hong, Chen; Jin, Yong; Hong, Zhang; Niu, Qigui; Qi, Weikang; Zhang, Yanlong; Li, Yu You; Gao, Yingxin

doi:10.1016/j.seppur.2014.12.013

Cited by 15 publications

(3 citation statements)

References 29 publications

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“…Nevertheless, the utilization of platinum-coated titanium (Pt/Ti) in this study was not the prerequisite for direct electro-oxidation, which was obligatory electrolysis by an oxide anode (MxOy) [25]. A series of indirect oxidation reactions in the presence of chloride during electrolysis are shown in Equations ( 2)- (8).…”

Section: Mechanismsmentioning

confidence: 99%

“…Recent studies have shown that high-strength wastewater can be treated to reduce is COD through the use of biological or physicochemical methods [7]. The up-flow anaerobic sludge blanket (UASB) system has been widely applied in the treatment of various types of wastewater, including high-strength beverage wastewater [8]. In the UASB process, HRT is a crucial parameter in the evaluation of degradation performance, particularly in relation to the removal of COD [9].…”

Section: Introductionmentioning

confidence: 99%

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The Combination of Anaerobic Digestion and Electro-Oxidation for Efficient COD Removal in Beverage Wastewater: Investigation of Electrolytic Cells

2023

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The world’s ever-growing population is driving an increased demand for clean water, which makes treating and reusing wastewater an essential practice. In recent years, biological and physicochemical methods have been preferred for wastewater treatment, with combined systems proving particularly effective. In this study, the combination of anaerobic digestion (AD) and electro-oxidation (EO) was investigated as a process for removing chemical oxygen demand (COD) from actual beverage wastewater. The effect of hydraulic retention time (HRT) on AD, electrolysis time, sodium chloride (NaCl) dosage, initial pH, and electro-properties on EO was investigated. At optimum conditions, namely an HRT of 2 days for AD, NaCl concentration of 3 g L−1, 80 min of EO time, natural pH (7.45), and applied voltage of 20 V for EO, the removal efficiency for COD was an impressive 96.47%, with energy consumption and specific energy consumption calculating 177.33 kWh m−3 and 33.79 kWh kgCOD−1, respectively. The amount of by-product gases (CH4 and H2) were also meagerly determined in this study. The results confirm that combining the AD and EO methods is an effective COD removal solution that can benefit the industry, while also offering a sustainable solution to combat water scarcity and meet the growing demand for clean water.

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Section: Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Combination of Anaerobic Digestion and Electro-Oxidation for Efficient COD Removal in Beverage Wastewater: Investigation of Electrolytic Cells

2023

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“…La temperatura recomendable de operación en reactores anaerobios es de 25 a 35 ºC para obtener las velocidades de las reacciones biológicas óptimas y proporcionar un tratamiento más estable (Tchobanoglous et al 2014). Por lo anterior, los trabajos de investigación con reactores UASB comúnmente se han realizado a temperaturas > 30 ºC (Atuanya y Chakrabarti 2004, Chou et al 2004, Diamantis y Aivasidis 2007, Sponza y Uluköy 2008, Yetilmezsoy y Sakar 2008, Nacheva et al 2009, El-Sheikh et al 2011, Senthilkumar et al 2011, Wang et al 2011, Wang y Han 2012, Qiu et al 2013, Hinken et al 2014, Li et al 2015a, b, Lu et al 2015.…”

Section: Introductionunclassified

Tratamiento De Un Agua Residual Industrial a Temperatura Psicrofílica Con Un Reactor Uasb

López

Esparza-Soto

Chávez

et al. 2019

Rev. Int. Contam. Amb.

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Palabras clave: baja temperatura, carga orgánica volumétrica, biogás, rendimiento celular RESUMEN En el presente trabajo se operó un reactor anaerobio de flujo ascendente (UASB, por sus siglas en inglés) a escala de laboratorio con un tiempo de retención hidráulico (6 h) y a temperatura psicrofílica (< 20 ºC). En el reactor UASB se trató agua residual de una industria chocolatera con dos cargas orgánicas volumétricas aplicadas (COVapl). Cada COVapl correspondió a una etapa experimental: la etapa experimental I con 1.8 ± 0.8 kg de demanda química de oxígeno soluble ([DQOs]/m 3 /d) y la etapa experimental II con 3.5 ± 0.9 kg DQOs/m 3 /d. El objetivo fue evaluar la eficiencia de remoción de la DQOs (ER), la producción de biogás (PB) y el rendimiento celular experimental (Yexp) en un reactor UASB a escala de laboratorio. Los parámetros de control monitoreados fueron pH, temperatura y flujo. La alcalinidad, ácidos grasos volátiles y DQOs se analizaron en el influente y efluente, mientras que los sólidos suspendidos se analizaron dentro del reactor y en el efluente. Durante el estado estacionario de las dos etapas experimentales la ER fue mayor al 90 %. La elevada ER obtenida mostró que en el reactor UASB se trató eficientemente el agua residual industrial a baja temperatura con las COVapl. La PB se incrementó cuando la COVapl aumentó (1.6 ± 0.8 y 3.5 ± 1.3 L/d con la COVapl de 1.8 y 3.5 kg DQOs/m 3 /d, respetivamente [1 atm, 273º K]). El Yexp de la etapa experimental II fue alto (0.11 kg SSV/kg DQOrem), lo cual pudo deberse a que la temperatura psicrofílica influyó sobre la tasa de crecimiento de los microorganismos anaerobios.

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A Review on Dewatering of Dredged Sediment in Water Bodies by Flocculation Processes

Chen,

Ran,

Wei

et al. 2024

Water Air Soil Pollut

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Treatment of 3,4,5-trimethoxybenzaldehyde and Di-bromo-aldehyde manufacturing wastewater by the coupled Fenton pretreatment and UASB reactor with emphasis on optimization and chemicals analysis

Cited by 15 publications

References 29 publications

The Combination of Anaerobic Digestion and Electro-Oxidation for Efficient COD Removal in Beverage Wastewater: Investigation of Electrolytic Cells

The Combination of Anaerobic Digestion and Electro-Oxidation for Efficient COD Removal in Beverage Wastewater: Investigation of Electrolytic Cells

Tratamiento De Un Agua Residual Industrial a Temperatura Psicrofílica Con Un Reactor Uasb

A Review on Dewatering of Dredged Sediment in Water Bodies by Flocculation Processes

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