Operation performance of up-flow anaerobic sludge blanket (UASB) bioreactor for biohydrogen production by self-granulated sludge using pre-treated palm oil mill effluent (POME) as carbon source

Mahmod, Safa Senan; Azahar, Azratul Madihah; Tan, Jian Ping; Jahim, Jamaliah Md; Abdul, Peer Mohamed; Mastar, Mohd Shahbudin; Anuar, Nurina; Yunus, Mohammed Faisal Mohammed; Asis, Ahmad Jaril; Wu, Shu-Yii

doi:10.1016/j.renene.2018.09.062

Cited by 44 publications

(16 citation statements)

References 70 publications

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“…In this study, small-sized MPGs were formed (Fig. 3a)), that could be related to the less solid content of the substrate as compared to the bigger-sized HPGs formed in the BioH 2 reactor 28 . Furthermore, the shear force of the stirring impeller in CSTR does not support the granulation as compared to UASB bioreactors, which explains the hollow surface of the MPG, shown in Fig.…”

Section: Discussionmentioning

confidence: 64%

“…microbial starvation) 9 . In this study, the system was most stable at HRT of 3 and 2 d. One of the advantages of two-stage anaerobic fermentation in this study is that the acetic acid in the hydrogenic POME effluent was the dominant VFA, whereas the formation of propionic acid in the first stage was less than 200 mM 28 . Thus, the methanogenic archaea were mainly the methane producing archaea from acetic acid.…”

Section: Discussionmentioning

confidence: 80%

“…The initial temperature was considered to be 45 °C, assuming a 10 °C drop in the effluent temperature due to the settling and feeding time, noting that the effluent from the DF-stage was at temperature of 55 °C. As a result, the total net energy gain for the two-stage anaerobic system was 11.2 kJ/ g COD , including the DF-stage that yielded in 2.45 mol-H 2 /mol-sugar (equivalent to E n = 3.6 kJ/g COD ) 28 . Overall, the net energy gain of the two-stage system was a positive value.…”

Section: Discussionmentioning

confidence: 99%

“…The production of BioH 2 which preceded BioCH 4 production stage does not only harness additional energy, but also help in treating POME without reducing the amount of biomass and can effectively improve the start-up of BioCH 4 production in the second stage. Based on our previous study of the first-stage of the DF process 28 , the hydrogenic effluent contains a good amount of VFAs; mainly acetic and butyric acids. Although two-stage anaerobic digestion is a well-established process, further improvement of the process is required.…”

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confidence: 99%

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Potential Utilisation of Dark-Fermented Palm Oil Mill Effluent in Continuous Production of Biomethane by Self-Granulated Mixed Culture

Mahmod

Azahar

Luthfi

et al. 2020

Sci Rep

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Two-stage anaerobic digestion of palm oil mill effluent (POME) is a promising method for converting the waste from the largest agricultural industry in Southeast Asia into a clean and sustainable energy. This study investigates the degradation of acid-rich effluent from the dark fermentation stage for the production of biomethane (BioCH4) in a 30-L continuous stirred-tank reactor (CSTR). The continuous methanogenic process was operated with varied HRTs (10 - 1 day) and OLRs (4.6–40.6 gCOD/L.d−1) under thermophilic conditions. Methanothermobacter sp. was the dominant thermophilic archaea that was responsible for the production rate of 4.3 LCH4/LPOME.d−1 and methane yield of 256.77 LCH4kgCOD at HRT of 2 d, which is the lowest HRT reported in the literature. The process was able to digest 85% and 64% of the initial POME’s COD and TSS, respectively. The formation of methane producing granules (MPG) played a pivotal role in sustaining the efficient and productive anaerobic system. We report herein that the anaerobic digestion was not only beneficial in reducing the contaminants in the liquid effluent, but generating BioCH4 gas with a positive net energy gain of 7.6 kJ/gCOD.

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Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Potential Utilisation of Dark-Fermented Palm Oil Mill Effluent in Continuous Production of Biomethane by Self-Granulated Mixed Culture

Mahmod

Azahar

Luthfi

et al. 2020

Sci Rep

Self Cite

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“…Recycling metals in the industrial wastewater, especially the heavy metals and the precious metals, is an effective strategy to “turn waste into wealth” and reduce the end‐point environmental impacts of wastewater emission simultaneously (Lou, Xu, Bai, Resina‐Gallego, & Ji, 2020; Sarwa & Verma, 2014; Wang, Yao, Zhang, & Zhou, 2020). In particular, the food waste‐recycling wastewater (FRW) has been proved to be an adequate carbon source substitute in the biological denitrification in the WWTP, which can reduce the system operating cost and improve the environmental benefits (Kim, Shin, Jannat, Tongco, & Hwang, 2017; Mahmod et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Wastewater treatment system optimization with an industrial symbiosis model: A case study of a Chinese eco‐industrial park

Tian

et al. 2020

J of Industrial Ecology

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In Chinese industrial parks, the centralized wastewater treatment plant (CWWTP) is an essential shared infrastructure to further purify the in‐plant pretreated industrial wastewater. Most of the contaminants, such as organic matter, are removed by in‐plant wastewater treatment to guarantee the safety and efficiency of the CWWTP. Carbon source shortages are common in the denitrification process in CWWTPs, and such issues are generally solved by adding external carbon sources, such as glucose. Some biodegradable organics that are abundant in industrial wastewater, such as food production wastewater, can be utilized as the external carbon sources for denitrification. This study proposed an industrial symbiosis‐based model to optimize the wastewater treatment system in industrial parks by reusing organic matter in food wastewaters as the external carbon source for advanced treatment processes in CWWTPs. A case study of a Chinese eco‐industrial park is investigated to verify the technical and economic feasibility of the model. The case study indicates that the overall cost‐savings potential of the model is approximately 6.55 million Chinese Yuan (CNY) per year, accounting for approximately 20% of the annual operating cost of the CWWTP. Additionally, the mitigation potential of greenhouse gas (GHG) emissions is 5977 t CO2‐eq per year, accounting for 1.7% of the GHG emissions of the original model. Furthermore, potential barriers to implementing the IS model and the relevant policy implications are discussed.

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Biohydrogen from Palm Oil Mill Effluent

Mahmod¹,

Abdul²,

Jahim³

2022

Biorefinery of Oil Producing Plants for Value‐Added Products

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Operation performance of up-flow anaerobic sludge blanket (UASB) bioreactor for biohydrogen production by self-granulated sludge using pre-treated palm oil mill effluent (POME) as carbon source

Cited by 44 publications

References 70 publications

Potential Utilisation of Dark-Fermented Palm Oil Mill Effluent in Continuous Production of Biomethane by Self-Granulated Mixed Culture

Potential Utilisation of Dark-Fermented Palm Oil Mill Effluent in Continuous Production of Biomethane by Self-Granulated Mixed Culture

Wastewater treatment system optimization with an industrial symbiosis model: A case study of a Chinese eco‐industrial park

Biohydrogen from Palm Oil Mill Effluent

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