Evaluation of relationship between biogas production and microbial communities in anaerobic co-digestion

Li, Dan; Kim, Min‐Soo; Kim, Hyun‐Jin; Choi, Okkyoung; Sang, Byoung In; Chiang, Pen Chi; Kim, Hyunook

doi:10.1007/s11814-017-0246-3

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…Due to the issues of an energy shortage, a rule to discover green energy is being developed to minimalize the consumption of fossil oil [1]. Utilization wastes into energy is a helpful solution to diminish greenhouse emission [2]. The anaerobic digestion (AD) decomposes organic materials into biogas as renewable energy.…”

Section: Introductionmentioning

confidence: 99%

Optimization of biogas from corn stover using liquid and solid-state anaerobic digestion

Shitophyta

Hanafi

Nugroho

2020

Turbo

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The shortage of fossil fuel can be minimized by developing renewable energies such as biogas. The raw material of biogas can be derived from corn stover. Biogas was produced under solid-state anaerobic digestion (SS-AD) and liquid anaerobic digestion (L-AD). The objectives of this study were to compare the biogas yield and analyze the pH value and VS degradation. The results reported that the SS-AD generated a higher biogas yield than L-AD. SS-AD could improve the biogas yield of 71%. Both SS-AD and L-AD had a higher final pH than the initial pH. Moreover, the VS degradation was proportionate to the biogas yield. The highest VS reduction was achieved on SS-AD. Keywords: anaerobic digestion, biogas, liquid state, solid state, volatile solid, renewable energy

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Section: Introductionmentioning

confidence: 99%

Optimization of biogas from corn stover using liquid and solid-state anaerobic digestion

Shitophyta

Hanafi

Nugroho

2020

Turbo

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“…Organic waste (food wastewater, sewage sludge, livestock manure) that was dumped in the ocean must be disposed of within land now. As a land treatment method for organic waste, anaerobic digestion treatment is receiving much attention [1].…”

Section: Introductionmentioning

confidence: 99%

Efficient Nitrogen Removal of Reject Water Generated from Anaerobic Digester Treating Sewage Sludge and Livestock Manure by Combining Anammox and Autotrophic Sulfur Denitrification Processes

Kwon¹,

Kim²,

Kim³

et al. 2019

Water

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The reject water from anaerobic digestion with high (Total Nitrogen) TN concentration was treated by a demonstration plant combining the anammox process and SOD (SOD®; Sulfur Oxidation Denitrification) process. The anaerobic digestion was a co-digestion of livestock wastewater, food waste water, and sewage sludge so that the TN concentration and conductivity of the reject water were very high. This anammox plant was the first anammox demonstration plant in South Korea. The maximum TN removal efficiency of 80% was achieved for the anammox reactor under nitrogen loading rate (NLR) of 0.45 kg-N/m3·d. As a result of decreasing the dilution of the reject water, the influent conductivity and NLR values were increased to 7.8 mS/cm and 0.7 kg/m3·d, causing a rapid decrease in the TN removal efficiency. The sludge concentration from the hydro-cyclone overflow was about 40 mg-MLVSS/L in which small sized anammox granules were detected. It was proven that the increase in (Mixed Liquor Volatile Suspended Solids) MLVSS concentration in the anammox reactor was not easy under high influent conductivity and NLR. 97% of NO2−-N+NO3−-N generated from the anammox process could be treated successfully by the SOD reactor. A TN removal efficiency of 35% under poor annamox treatment could increase to 67% by applying the SOD reactor post treatment for the removal of NO3−-N. The dominant anammox bacteria in the anammox reactor was identified as Brocadia fulgida and 9.3% (genus level) of the bacteria out of the total bacteria were anammox bacteria.

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“…Compatible co-substrates have complementary physico-chemical properties, digestion kinetics and digestion pathways. Additionally co-digestion of complementary co-substrates boosts biogas production by converting increased organic loading into methane via an expanding myriad of metabolic pathways which engages a more diverse microbial community [226].…”

Section: Introductionmentioning

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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Evaluation of relationship between biogas production and microbial communities in anaerobic co-digestion

Cited by 9 publications

References 36 publications

Optimization of biogas from corn stover using liquid and solid-state anaerobic digestion

Optimization of biogas from corn stover using liquid and solid-state anaerobic digestion

Efficient Nitrogen Removal of Reject Water Generated from Anaerobic Digester Treating Sewage Sludge and Livestock Manure by Combining Anammox and Autotrophic Sulfur Denitrification Processes

Anaerobic co-digestion: micro to full-scale

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