Performance comparison between mesophilic and thermophilic anaerobic reactors for treatment of palm oil mill effluent

Jeong, Jaeseung; Son, Sung-Min; Pyon, Jun-Hyeon; Park, Joo-Yang

doi:10.1016/j.biortech.2014.04.007

Cited by 44 publications

(9 citation statements)

References 28 publications

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“…In this current study, a temporal increase in pH level in the rector revealed that the fatty and amino acids dissolved in RPMW had been well converted into intermediate products, and later into carbon dioxide and methane, resulting in an increased pH level in the reactor. This was also supported by Jeong et al (2014), who observed similar results.…”

Section: Influence Of Temperature Changes On Ph Levelsupporting

confidence: 82%

“…Similarly, in anaerobic filters treating paper mill wastewater, Yilmaz et al (2008) observed that thermophilic conditions produced higher methane yield of 0.291 L CH 4 /g COD removed compared to 0.274 L CH 4 /g COD removed in mesophilic conditions. Due to higher substrate digestion rate, thermophilic reactors were found to generate more biogas than mesophilic reactors (Jeong et al 2014). In this study, the methane yield was less than the theoretical methane yield rate of 0.35 L CH 4 /g COD removed .…”

Section: Influence Of Temperature Changes On Methane Productionmentioning

confidence: 65%

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Temperature analysis of a novel MAIB reactor during the treatment of wastewater from recycled paper mill

Zwain

Naje

Vakili

et al. 2021

Water Practice and Technology

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Anaerobic digestion (AD) is an essential technology for wastewater management, resource recovery and biogas production, and it is considered as an efficient and reliable treatment method for many wastewaters. Operating parameters have been shown to directly affect the stability and treatment performance of AD, especially temperature. For 180 days, the AD of recycled paper mill wastewater (RPMW) was carried out in a modified anaerobic inclining-baffled (MAIB) reactor under various temperature conditions, i.e. 29 °C (low mesophilic), 37 °C (mesophilic) and 55 °C (thermophilic). It was found that total COD removal of 94, 96 and 76%, and methane yields of 0.125, 0.196 and 0.256 L CH4/g CODremoved were attained at temperature of 29, 37 and 55 °C, respectively. Throughout the three transition periods, the pH level in the MAIB reactor was fluctuated slightly within the range of 5.8–6.5 without affecting the system stability. The results concluded that thermophilic condition strongly influenced the MAIB reactor performance, leading to lower COD removal, higher methane yield and gradually recovered pH level.

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Section: Influence Of Temperature Changes On Ph Levelsupporting

confidence: 82%

Section: Influence Of Temperature Changes On Methane Productionmentioning

confidence: 65%

Temperature analysis of a novel MAIB reactor during the treatment of wastewater from recycled paper mill

Zwain

Naje

Vakili

et al. 2021

Water Practice and Technology

View full text Add to dashboard Cite

show abstract

“…Thermophilic digesters have higher biogas production and a faster biochemical reaction rate, whereas mesophilic digesters require lower input energy for operation [6,7]. Jeong et al [8] compared the performance between mesophilic and thermophilic anaerobic reactors and reported that thermophilic reactors could produce 32.5% more biogas than mesophilic reactors at an organic loading rate (OLR) of 15 kg COD/m 3 /d.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Temperature Effect on Start-Up Operation from Anaerobic Digestion of Acidified Palm Oil Mill Effluent

et al. 2019

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Malaysia is one of the largest palm oil producers worldwide and its most abundant waste, palm oil mill effluent (POME), can be used as a feedstock to produce methane. Anaerobic digestion is ideal for treating POME in methane production due to its tolerance to high-strength chemical oxygen demand (COD). In this work, we compared the culture conditions during the start-up of anaerobic digestion of acidified POME between thermophilic (55 °C) and mesophilic (37 °C) temperatures. The pH of the digester was maintained throughout the experiment at 7.30 ± 0.2 in a working volume of 1000 mL. This study revealed that the thermophilic temperature stabilized faster on the 44th day compared to the 52nd day for the mesophilic temperature. Furthermore, the thermophilic temperature indicated higher biogas production at 0.60 L- CH 4 /L·d compared to the mesophilic temperature at 0.26 L- CH 4 /L·d. Results from this study were consistent with the COD removal of thermophilic temperature which was also higher than the mesophilic temperature.

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“…Previous studies reported 93.5% COD removal from POME using combined high rate anaerobic reactors. Many studies posited that thermophilic anaerobic processes result in 25–50% higher methane yield than mesophilic conditions [5,6].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Thermophilic Anaerobic Membrane Bioreactor for Palm Oil Wastewater Treatment

2019

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Anaerobic treatment processes have achieved popularity in treating palm oil mill effluent due to its high treatability and biogas generation. The use of externally submerged membranes with anaerobic reactors promotes the retention of the biomass in the reactor. This study was conducted in thermophilic conditions with the Polytetrafluoroethylene hollow fiber (PTFE-HF) membrane which was operated at 55 °C. The reactor was operated at Organic Loading Rates (OLR) of 2, 3, 4, 6, 8, and 10 kg Chemical Oxygen Demand (COD)/m3·d to investigate the treatment performance and the membrane operation. The efficiency of the COD removal achieved by the system was between 93–98%. The highest methane yield achieved was 0.56 m3 CH4/kg CODr. The reactor mixed liquor volatile suspended solids (MLVSS) was maintained between 11.1 g/L to 20.9 g/L. A dead-end mode PTFE hollow fiber microfiltration was operated with the constant flux of 3 LMH (L/m2·h) in permeate recirculation mode to separate the clear final effluent and retain the biomass in the reactor. Membrane fouling was one of the limiting factors in the membrane bioreactor application. In this study, organic fouling was observed to be 93% of the total membrane fouling.

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Performance comparison between mesophilic and thermophilic anaerobic reactors for treatment of palm oil mill effluent

Cited by 44 publications

References 28 publications

Temperature analysis of a novel MAIB reactor during the treatment of wastewater from recycled paper mill

Temperature analysis of a novel MAIB reactor during the treatment of wastewater from recycled paper mill

Investigation of Temperature Effect on Start-Up Operation from Anaerobic Digestion of Acidified Palm Oil Mill Effluent

Performance Evaluation of a Thermophilic Anaerobic Membrane Bioreactor for Palm Oil Wastewater Treatment

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