Optimization of hydraulic retention time and organic loading rate for volatile fatty acid production from low strength wastewater in an anaerobic membrane bioreactor

Khan, Mohd Atiqueuzzaman; Ngo, Huu Hao; Guo, Wenshan; Liu, Yiwen; Chang, Soon Woong; Nguyen, Dinh Duc; Zhang, Shicheng; Luo, Gang; Jia, Hui

doi:10.1016/j.biortech.2018.09.075

Cited by 49 publications

(30 citation statements)

References 38 publications

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“…Results indicated fouling proportions as follows: 1.2% physically reversible, 15.8% physically irreversible inorganic, 44.5% physically irreversible organic, and 38.5% irrecoverable fouling. Khan et al (2019) investigated the optimal Hydraulic Retention Time (HRT) and loading rate for low-strength wastewater. The highest VFA concentration was achieved at HRT of 8 hr.…”

Section: Annual Literature Reviewmentioning

confidence: 99%

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Membrane processes

Arabi¹,

Pellegrin

Aguinaldo

et al. 2020

Water Environment Research

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This literature review provides a review for publications in 2018 and 2019 and includes information membrane processes findings for municipal and industrial applications. This review is a subsection of the annual Water Environment Federation literature review for Treatment Systems section. The following topics are covered in this literature review: industrial wastewater and membrane. Bioreactor (MBR) configuration, membrane fouling, design, reuse, nutrient removal, operation, anaerobic membrane systems, microconstituents removal, membrane technology advances, and modeling. Other subsections of the Treatment Systems section that might relate to this literature review include the following: Biological Fixed-Film Systems, Activated Sludge, and Other Aerobic Suspended Culture Processes, Anaerobic Processes, and Water Reclamation and Reuse. This publication might also have related information on membrane processes: Industrial Wastes, Hazardous Wastes, and Fate and Effects of Pollutants.

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Section: Annual Literature Reviewmentioning

confidence: 99%

“…Khan et al. (2019) investigated the optimal Hydraulic Retention Time (HRT) and loading rate for low‐strength wastewater. The highest VFA concentration was achieved at HRT of 8 hr.…”

Section: Fixed Film and Anaerobic Mbrmentioning

confidence: 99%

Membrane processes

Arabi¹,

Pellegrin

Aguinaldo

et al. 2020

Water Environment Research

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“…Process optimization, different pre-and post-treatment processes along with chemical and biological additives have been used to improve the production of biogas from the anaerobic process (Ngo et al, 2019). In contrast, production of VFA from the anaerobic process offers technical and economic advantages, for example, bioreactor stability, less expensive operation, and a relatively higher profits compared to methane (Hassanein et al, 2017;Khan et al, 2019; Khan et al, 2016b).…”

Section: Introductionmentioning

confidence: 99%

“…VFAs are used as a precursor for carbon-based biopolymers such as Polyhydroxyalkanoate (PHA), fuels like biodiesel, organic chemicals like alcohols, aldehydes and even for the production of biogas (Esteban-Gutiérrez et al, 2018; Jankowska et al, 2018; Khan et al, 2019). During anaerobic digestion, the initial stage of hydrolysis involves the production of VFA along with amino acids and sugar through the conversion of proteins and carbohydrates.…”

Section: Introductionmentioning

confidence: 99%

“…For a given anaerobic system, production of VFA can be maximized through optimizing common process conditions, for instance Hydraulic Retention Time (HRT), Organic Loading Rate (OLR), and pH. Our previous studies demonstrate that a low HRT (8 hrs) at a loading rate of 600 mg COD/l HRT produced the highest overall VFA yield (48.20 ± 1.21%) without any selective inhibition of a microbial community (Khan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Selective production of volatile fatty acids at different pH in an anaerobic membrane bioreactor

Khan

Ngo

Guo

et al. 2019

Bioresource Technology

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This study investigated the production of major volatile fatty acid (VFA) components in an anaerobic membrane bioreactor (AnMBR) to treat low-strength synthetic wastewater. No selective inhibition was applied for methane production and solvent-extraction method was used for VFA extraction. The results showed acetic and propionic acid were the predominant VFA components at pH 7.0 and 6.0 with concentrations of 1.444 ± 0.051 and 0.516 ± 0.032 mili-mol/l respectively. At pH 12.0 isobutyric acid was the major VFA component with a highest concentration of 0.712 ± 0.008 mili-mol/l. The highest VFA yield was 48.74 ± 1.5 mg VFA/ 100 mg CODfeed at pH 7.0. At different pH, AnMBR performance was evaluated in terms of COD, nutrient removal and membrane fouling rate. It was observed that the membrane fouled at a faster rate in both acidic and alkaline pH conditions, the slowest rate in membrane fouling was observed at pH 7.0.

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