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

Hamzah, Muhammad Arif Fikri; Jahim, Jamaliah Md; Abdul, Peer Mohamed; Asis, Ahmad Jaril

doi:10.3390/en12132473

Cited by 22 publications

(13 citation statements)

References 45 publications

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“…According to Streitwieser [68], the thermophilic range is a better option for easily degradable substrates, which leads to an increase in biogas production as well as an increase in the reaction rates. Besides, shorter start-up time is needed for the new operating biogas plants at thermophilic conditions [69][70][71]. To supply stable biogas production, the temperature should be maintained stable [72].…”

Section: Process Temperaturementioning

confidence: 99%

Operational Parameters of Biogas Plants: A Review and Evaluation Study

et al. 2020

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The biogas production technology has improved over the last years for the aim of reducing the costs of the process, increasing the biogas yields, and minimizing the greenhouse gas emissions. To obtain a stable and efficient biogas production, there are several design considerations and operational parameters to be taken into account. Besides, adapting the process to unanticipated conditions can be achieved by adequate monitoring of various operational parameters. This paper reviews the research that has been conducted over the last years. This review paper summarizes the developments in biogas design and operation, while highlighting the main factors that affect the efficiency of the anaerobic digestion process. The study’s outcomes revealed that the optimum operational values of the main parameters may vary from one biogas plant to another. Additionally, the negative conditions that should be avoided while operating a biogas plant were identified.

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Section: Process Temperaturementioning

confidence: 99%

Operational Parameters of Biogas Plants: A Review and Evaluation Study

et al. 2020

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“…Anaerobic digesters were constructed using 2-L heavy-duty vacuum bottles filled with 400 mL of palm oil mill effluent (POME) and 5.0 g of activated sludge to start the digestion (Hamzah et al, 2019 ). The POME was obtained from a palm oil processing factory in Malaysia.…”

Section: Methodsmentioning

confidence: 99%

Assessment of the applicability of a low-cost sensor–based methane monitoring system for continuous multi-channel sampling

Nagahage

Fujino

2021

Environ Monit Assess

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Systems that are made of several low-cost gas sensors with automatic gas sampling may have the potential to serve as reliable fast methane analyzers. However, there is a lack of reports about such types of systems evaluated under field conditions. Here, we developed a continuous methane monitoring system with automated gas sampling unit using low-cost gas sensors, TGS 2611 and MQ-4, that use a simple cloud-based data acquisition platform. We verified the consistency, repeatability, and reproducibility of the data obtained by TGS 2611 and MQ-4 low-cost gas sensors by measuring high- and low-concentration methane samples. The normalized root-mean-square errors (NRMSEs) of the samples with high methane concentrations, [CH4] of 3, 4, 6, and 7%, were 0.0788, 0.0696, 0.1198, and 0.0719 for the TGS 2611 sensor, respectively, and were confirmed using a gas chromatograph as a reference analyzer. The NRMSEs of the samples with low [CH4] of 0.096, 0.145, 0.193, and 0.241% measured by the TGS 2611 sensor were 0.0641, 0.1749, 0.0157, and 0.1613, whereas those NRMSEs of the same concentrations measured by the MQ-4 sensor were 0.3143, 0.5766, 0.6301, and 0.6859, respectively. Laboratory-scale anaerobic digesters were tested using the developed system. The anaerobic digesters were continuously operated for 2 months, demonstrating the potential use of sensors for detecting and monitoring methane in the field level application. This study utilized a unique way to combine the advantages of low-cost sensors and develop a reliable monitoring system by minimizing drawbacks of low-cost sensors.

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“…Biogas yang dihasilkan terdiri dari 65% CH4, 35% CO2, dan sejumlah kecil hidrogen sulfida (H2S), yang merupakan produk akhir AD. Metana yang dihasilkan berpotensi menggantikan bahan bakar fosil sebagai sumber energi [6].…”

Section: Teoriunclassified

“…Pada tahap awal, pH mengalami penurunan untuk setiap laju pengadukan. Hal ini disebabkan dikarenakan terjadinya prevalensi VFA (volatiles fatty acid) [6]. Hal ini akan meningkatkan pertumbuhan bakteri asidogenik dikarenakan pertumbuhan ideal bakteri asidogenik berada pada rentang pH 5,5-6,5 [14].…”

Section: Gambar 2 Pengaruh Laju Pengadukan Terhadap Ph Dan M-alkalinityunclassified

Pengaruh Laju Pengadukan Terhadap Stabilitas Digester Anaerobik Satu Tahap pada Pembentukan Biogas dari Limbah Cair Pabrik Kelapa Sawit Menggunakan Lab Scale Reaktor Batch

2020

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Mixing is essential to increase the efficiency of interactions between active microbes and organic matter during the anaerobic digestion process. The purpose of this research is to study the effect of mixing rate on the stability of one stage anaerobic digesters in biogas production in terms of pH and alkalinity. The production of biogas from palm oil mill effluent was carried out in a 6000 ml batch reactor at varying mixing rates: 100 rpm, 150 rpm, 200 rpm, 250 rpm, and 300 rpm. The reactor is operated with a mixture condition maintained at a pH of 7 ± 0.2 and an operating temperature of 55 ° C. NaHCO3 is added to the mixture to control and maintain the pH of the mixture. Analysis of pH and alkalinity is carried out every day to see the reactor stability. The best results were obtained at a mixing rate of 200 rpm with the pH produced stable during the process is 7. The alkalinity profile produced at each mixing rate was relatively stable with an alkalinity range is 3500-4500 mg/L. The best mixing rate is 200 rpm with a stable pH and alkalinity and the highest biogas production is 457 ml/day.

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

Cited by 22 publications

References 45 publications

Operational Parameters of Biogas Plants: A Review and Evaluation Study

Operational Parameters of Biogas Plants: A Review and Evaluation Study

Assessment of the applicability of a low-cost sensor–based methane monitoring system for continuous multi-channel sampling

Pengaruh Laju Pengadukan Terhadap Stabilitas Digester Anaerobik Satu Tahap pada Pembentukan Biogas dari Limbah Cair Pabrik Kelapa Sawit Menggunakan Lab Scale Reaktor Batch

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