A review of anaerobic digestion bio-kinetics

Maleki, Esmat; Bokhary, Alnour; Liao, Baoqiang

doi:10.1007/s11157-018-9484-z

Cited by 41 publications

(20 citation statements)

References 89 publications

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“…Kondisi disebabkan proses konversi bahan organik dan anorganik tidak hanya melibatkan kinerja proses mikrobiologis, tetapi faktor hidrodinamika di dalam reaktor turut berperan di dalam mekanisme proses (Li et al, 2016). Pada kinerja proses mikrobiologis, banyak upaya telah dilakukan untuk memahami dan meningkatkan pengembangan kemampuan estimasi biokinetika proses anaerobik, seperti biokinetika pertumbuhan mikroorganisme dan utilisasi substrat (Maleki et al, 2018). Biokinetika merupakan salah satu metode pengembangan untuk memberikan gambaran dan prediksi kinerja proses untuk desain, operasi, dan kontrol pada sistem pengolahan air limbah biologis, termasuk unit ABR.…”

Section: Pendahuluanunclassified

“…Parameter biokinetika telah banyak dihasilkan dari berbagai penelitian air limbah anaerobik untuk tipe bioreaktor konvensional, bioreaktor batch, bioreaktor kontinu, dan bioreaktor membran (Maleki et al, 2018). Parameter biokinetika KS, μmax, Kd, dan Rmax dihasilkan dari tipe bioreaktor packed-bed anaerobic hybrid reactor (AHR) melalui Model Monod dan Model Grau orde kedua dengan variasi OLR dan HRT (Pandian et al, 2011).…”

Section: Perbandingan Nilai Parameter Biokinetika Anaerobikunclassified

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Model Estimasi Biokinetika Untuk Proses Post-Denitrifikasi Air Limbah Domestik Pada Unit Anaerobic Baffled Reactor

Kurniawan

Amelia

Wirayudhatama

et al. 2021

JSDA

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This study developed a combination of Continuous Stirred Tank Reactor (CSTR) for the acid fermentation and the Anaerobic Baffled Reactor (ABR) post-denitrification through high nitrite injection. Volatile Fatty Acids (VFAs) as a substrate for the post-denitrification process were optimally produced in the acid fermentation process. The aim of this study was to obtain the estimation of biokinetic values to predict the effluent wastewater quality in ABR post-denitrification process under unsteady state. The reactor was operated for HRT 7 days at temperature 25-28 ˚C and pH 6-7,2. The influent and effluent substrate concentration were monitored continuously for 160 days. Post-denitrification biokinetic from the Contois equation resulted in the value of hydrolysis rate (Kh) of 0.077 day-1, the substrate transport rate (k) of 4.364×10-6 Lmg-1day-1, maximum specific growth rate (μmax) of 0.559 day-1, half saturation constant (KS) of 0.209 mgL-1, microbial decay coefficient (b) of 0.0145 days-1; yield coefficient (Y) of 0.084 g-VSSg-COD-1. The validation of biokinetic parameters based on statistical analysis showed fairly precise results following the trend of experimental data to determine the substrate concentration in the effluent unit. Therefore, the biokinetic values can be applied in the design of ABR post-denitrification using primary sludge incorporation with high strength nitrate.Keywords: Anaerobic baffled reactor, biokinetics, Contois, hydrolysis, post-denitrification.

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Section: Pendahuluanunclassified

Section: Perbandingan Nilai Parameter Biokinetika Anaerobikunclassified

Model Estimasi Biokinetika Untuk Proses Post-Denitrifikasi Air Limbah Domestik Pada Unit Anaerobic Baffled Reactor

Kurniawan

Amelia

Wirayudhatama

et al. 2021

JSDA

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“…Temperature affects the nature of microorganism metabolism, biomass composition, dietary requirements and reaction speed. For suitable groups of organisms, the increase in temperature affects the rate of growth, and too high a temperature (above the optimal value) causes protein denaturation [16]. The optimum mixing ensures maximum biogas yield by ensuring better contact of bacteria with substrate particles.…”

Section: Introductionmentioning

confidence: 99%

The use of out-of-date frozen food as a substrate for biogas in anaerobic methane fermentation

Pietrzyk

Klepacz-Smółka

2018

Acta Innovations

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The declining quantity of fossil fuels and the increasing demand for energy are two of the many problems that are affecting current times. This is why there is an increasing interest in and introduction of operations related to renewable sources of energy. One of many such possibilities is to conduct the biomass methane fermentation process and to obtain clean energy in the form of biogas. The aim of this research was to analyse the biogas-generating potential (Biochemical Methane Potential) of out-of-date frozen products in the laboratory anaerobic fermentation process and the near-infrared method with appropriate Biochemical Methane Potential calibration. The results obtained showed that selected frozen products are an excellent material for use as substrates resulting in the production of high quality biogas. It gives the opportunity to continue research, mainly in terms of applications, e.g. for biogas plants, using other available products on the market and the selection of their mixtures.

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“…A number of models have been developed to describe the key metabolic processes in anaerobic digestion [44,65,[131][132][133]. First order kinetics have been used to describe hydrolysis and monod-type kinetics have been used to describe acidogenesis, acetogenesis and methanogenesis.…”

Section: Research Gapmentioning

confidence: 99%

Anaerobic co-digestion: micro to full-scale

Macintosh¹

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Anaerobic digestion (AD), by its simultaneous provision of sustainable energy generation and means of recycling organic material, is a technology integral to the successful implementation of the circular economy. As a sustainable biogas technology, AD provides a broad range of benefits encompassing waste treatment, environmental protection, increasing the economic value of otherwise low-value material as well as the production of electricity, heat and of advanced gaseous biofuels. While AD is widely applied in industry to treat organic waste, there exists a strategy to increase biogas production whilst leveraging existing AD infrastructure through co-digestion. Anaerobic co-digestion (AcoD) involves the simultaneous anaerobic digestion of two or more biodegradable waste streams.Whilst AcoD offers great potential for enhanced methane production, incompatible substrates or the overdosing of co-substrates can lead to process failure; however, dosage strategies can be managed to avoid organic overloading and the subsequent process failure.Temperature is known to significantly impact the biochemical and physio-chemical processes involved in AD. Whilst most digesters are controlled at mesophilic (37°C) or thermophilic (55°C) temperatures, other AD systems -such as covered anaerobic lagoons -are operated at ambient temperature conditions and can be subject to seasonal variations of up to 20°C. Few studies have been conducted at psychrophilic temperatures; understanding the impact of temperature on co-digestion capacity is, therefore, vital to inform seasonal dosage strategies for these ambient AD systems.An understanding of the temperature dependency of co-digestion required the investigation of the impact of operating temperature on long-term anaerobic digestion performance, metabolic activity rates, and microbial composition of different feedstocks. Four bench-scale continuous digesters, of which two treated mixed sewage sludge (SS) and two treated pig manure (PM), were operated at 1-1.5 g VS L -1 d -1 for over 600 days and transitioned through three operating temperature regimes (37°C, 25°C and 15°C, each greater than 100 days). Minimal change in operational performance was observed between 37°C and 25°C for both the SS and PM systems; however, at 15°C, process stability and performance of both systems was greatly reduced due to slower process kinetics and reduced substrate degradability. The PM system experienced greater process instability than the SS system at 15°C due, in part, to higher degradable OLR and a greater imbalance between upstream and downstream metabolic activity levels.Characterisation of metabolic activity rates were performed using batch activity tests with model substrates and temperature adapted inoculum sourced from the bench scale continuous digesters. The metabolic activity rates measured for the SS and PM systems at 37, 25 and 15°C were hydrolysis of cellulose, gelatin, and oleic acid; fermentation of glucose and glycerol; degradation of propionate and butyrate; and aceticlastic and hydrogen...

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A review of anaerobic digestion bio-kinetics

Cited by 41 publications

References 89 publications

Model Estimasi Biokinetika Untuk Proses Post-Denitrifikasi Air Limbah Domestik Pada Unit Anaerobic Baffled Reactor

Model Estimasi Biokinetika Untuk Proses Post-Denitrifikasi Air Limbah Domestik Pada Unit Anaerobic Baffled Reactor

The use of out-of-date frozen food as a substrate for biogas in anaerobic methane fermentation

Anaerobic co-digestion: micro to full-scale

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