Biological tannery wastewater treatment using two stage UASB reactors

El-Sheikh, M. M. A.; Saleh, Hazem I.; Flora, Joeseph R.; AbdEl-Ghany, Mahmoud R.

doi:10.1016/j.desal.2011.03.060

Cited by 68 publications

(19 citation statements)

References 23 publications

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“…El‐Sheikh et al . (2011) reported the efficiency of a two‐stage UASB reactor treating highly complex tannery effluent anaerobically with HRT of 12 hours, as 79.6% and 82.4% for BOD and COD, respectively. Anaerobic digestion resulted in the reduction in organic load with the increase in NH 4 ‐N and slightly increased dissolved oxygen (DO) concentration will possibly support the microalgae growth with the slight adjustment of pH to enhance the overall treatment efficiency.…”

Section: Tannery Effluent As a Growing Substrate For Microalgaementioning

confidence: 99%

Opportunities for phycoremediation approach in tannery effluent: A treatment perspective

Saranya

Shanthakumar

2018

Env Prog and Sustain Energy

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Consumer demand for the leather products intensifies every year, especially in the fashion sector. With increasing pressure regarding chemicals, water usage, and landfill issues, the leather industries require ongoing research at production as well as effluent treatment level to ensure the stability of the industry. Industrialization made the outbreak of economic growth and energy demand with least consideration of environmental issues, especially in developing countries. Currently, microalgae have shown a significant promise in industrial effluent treatment. Further, the microalgal lipid accumulation potential has a substantial share in meeting the energy demand as renewable energy resource (e.g., Biofuel). Hence, microalgae assimilation of atmospheric CO2 and pollutants from the aqueous environment has overwhelming interest among researchers for combined treatment of industrial effluents and greenhouse gas mitigation from industrial emissions. This review focuses on identifying the potentials of integrating CO2 sequestration in tannery effluent treatment by microalgae. In addition, it summarizes the ability of microalgae for nutrient removal under flue gas environment and fuel production potential under stress condition. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13078, 2019

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Section: Tannery Effluent As a Growing Substrate For Microalgaementioning

confidence: 99%

Opportunities for phycoremediation approach in tannery effluent: A treatment perspective

Saranya

Shanthakumar

2018

Env Prog and Sustain Energy

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“…Most of the works on that field use experimental studies to assess the influence of changes in the process control and operation, e.g. the use of recycle streams, series reactors, changes in the hydraulic retention time (HRT) (EL-SHEIKH et al, 2011;INTANOO et al, 2014;RIZVI et al, 2015;FERRAZ JUNIOR et al, 2016). Changes on the biomass source and the supplementation of the process aiming higher biogas production are also under study by some authors (JANKE et al, 2016;BARROS;DUDA;OLIVEIRA, 2016).…”

Section: Introductionmentioning

confidence: 99%

CFD simulation and PIV validation of the gas/liquid behavior in an UASB reactor

D’Bastiani

Alba

Mazzarotto

et al. 2020

Eng. Sanit. Ambient.

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As the world population increases, the need to develop more efficient wastewater treatment systems requires the use of new technologies. Software aided project and optimization of bioreactors and bioprocesses have become a matter of interest in recent years, especially due to the advance in the state-of-the-art of computational resources. This work aimed to perform gas/liquid numerical simulations using the Fluent 16.2 software and to validate this model through Particle Image Velocimetry (PIV) and shadow imaging techniques. Eulerian-Eulerian, laminar, tridimensional and transient simulations were carried out. The results for the mass imbalance for the gas and liquid phases, gas volumetric fraction, gas velocity, bubble size, liquid magnitude and upflow velocity and the velocity profiles for the liquid phase were successfully validated against experimental data.Concerning the dispersed phase, it was found a difference of 4.37% for the gas volumetric fraction between experiments and simulations.Simulated results showed a difference for the bubble mean velocity of 1.73% when compared with shadow imaging results. No coalescence was observed along the experiments, and the flow regime was characterized as dispersed bubble flow. Regarding the liquid phase, it was found a difference of 3.2% for the mean velocity, between simulated and PIV results. Simulated and experimental velocity profiles showed a better agreement at the center of the reactor. Some differences were observed in those profiles, due to geometry simplifications assumed in order to get a better mesh.Considering the good agreement between simulation and experiments, the model was considered validated.

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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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Biological tannery wastewater treatment using two stage UASB reactors

Cited by 68 publications

References 23 publications

Opportunities for phycoremediation approach in tannery effluent: A treatment perspective

Opportunities for phycoremediation approach in tannery effluent: A treatment perspective

CFD simulation and PIV validation of the gas/liquid behavior in an UASB reactor

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

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