Effects of lipid concentration on thermophilic anaerobic co-digestion of food waste and grease waste in a siphon-driven self-agitated anaerobic reactor

Hu, Yujin; Kobayashi, Takuro; Zhen, Guangyin; Shi, Chen; Xu, Kai

doi:10.1016/j.btre.2018.e00269

Cited by 16 publications

(7 citation statements)

References 33 publications

(47 reference statements)

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“…Anaerobic digestion is one of the most efficient treatment approaches for different kinds of waste biomass such as sewage sludge, livestock manure, food waste and agricultural waste [ 3 , 4 ]. Nowadays, the anaerobic digestion of energy crops has been widely applied in Europe.…”

Section: Introductionmentioning

confidence: 99%

The role of rice husk biochar addition in anaerobic digestion for sweet sorghum under high loading condition

Kobayashi

et al. 2020

Biotechnology Reports

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Highlights Rick husk biochar addition mitigated the pH decrease during high load sorghum AD. 20 g/L biochar addition reduced the peak total VFA by 375 mg/L at F/M ratio of 1.2. Maximum methane production rate was increased by 25 % with 15 g/L biochar addition. Lag phase time was decreased by 45 % with 15 g/L biochar addition.

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Section: Introductionmentioning

confidence: 99%

The role of rice husk biochar addition in anaerobic digestion for sweet sorghum under high loading condition

Kobayashi

et al. 2020

Biotechnology Reports

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“…Conversely, it can be seen that C/N ratio of FW and CD did not fall in the optimum range, which were reported (Section 2.1) to be 60 (FW) and 8 (CD). Furthermore, FW contains lipids; therefore, during the digestion of lipids in FW, long-chain fatty acids (LCFAs) are produced [62]. The presence of LCFAs caused inhibition in the AD system and obstructed the production of biogas [63].…”

Section: Biogas Production At Different Olrsmentioning

confidence: 99%

Anaerobic Digestion, Codigestion of Food Waste, and Chicken Dung: Correlation of Kinetic Parameters with Digester Performance and On-Farm Electrical Energy Generation Potential

et al. 2022

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Valorization of agro-food waste through anaerobic digestion (AD) is gaining prominence as alternative method of waste minimization and renewable energy production. The aim of this study was to identify the key parameters for digester performance subjected to kinetic study and semicontinuous operation. Biochemical methane potential (BMP) tests were conducted in two different operating conditions: without mixing (WM) and continuous mixing (CM). Three different substrates, including food waste (FW), chicken dung (CD), and codigestion of FW and CD (FWCD) were used. Further kinetic evaluation was performed to identify mixing’s effect on kinetic parameters and correlation of the kinetic parameters with digester performance (volatile solid removal (VS%) and specific methane production (SMP)). The four models applied were: modified Gompertz, logistic, first-order, and Monod. It was found that the CM mode revealed higher values of Rm and k as compared to the WM mode, and the trend was consistently observed in the modified Gompertz model. Nonetheless, the logistic model demonstrated good correlation of kinetic parameters with VS% and SMP. In the continuous systems, the optimum OLR was recorded at 4, 5, and 7 g VS/L/d for FW, CD, and FWCD respectively. Therefore, it was deduced that codigestion significantly improved digester performance. Electrical energy generation at the laboratory scale was 0.002, 0.003, and 0.006 kWh for the FW, CD, and FWCD substrates, respectively. Thus, projected electrical energy generation at the on-farm scale was 372 kWh, 382 kWh, and 518 kWh per day, respectively. Hence, the output could be used as a precursor for large-scale digester-system optimization.

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“…According to literature reports, improved process performance was observed with the addition of GTW to different co-substrates, such as sewage sludge [11], animal manure [12], and FW [13]. Compared with other main-substrates, anaerobic co-digestion of FW with GTW provides an economic option for on-site waste treatment in urban areas because of the close proximity of those two organic wastes [14]. In fact, a tall building in a Japanese city center has recently installed a small biogas generator system for the anaerobic co-digestion of FW with GTW [15].…”

Section: Introductionmentioning

confidence: 99%

“…Alves et al [19] reported a novel inverted anaerobic sludge blanket reactor (IASB) to effectively enhance methane production from LCFA-containing wastewater in AD. In our previous study, a siphon-driven self-agitated anaerobic reactor (SDSAR) was developed for the anaerobic co-digestion of FW and GTW [14]. However, relatively low OLR (1 to 4 g VS/L/d) or long HRT (up to 80 d) are still the few feasible choices for actual FW treatment with traditional digesters to sustain stable AD process and avoid LCFA accumulation [7].…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of CSTR and CSFBR in Anaerobic Co-Digestion of Food Waste with Grease Trap Waste

et al. 2022

Energies

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In this study, a newly established bench-scale thermophilic continuously stirred fluidized bed reactor (CSFBR) was applied for anaerobic co-digestion of food waste (FW) with grease trap waste (GTW). The performance of CSFBR regarding stability and treatment efficiency was inspected through a laboratory contrast experiment with two traditional continuous stirred tank reactors (CSTRs). In the OLR range of 3.19–7.41 g COD/L/d, the methane production rate of the thermophilic CSFBR was about as high as that of the thermophilic CSTR. Nevertheless, the thermophilic CSFBR had much lower VFAs (<1000 mg/L) and LCFA concentrations (<100 mg/L) as compared with the thermophilic CSTR. Unlike the mesophilic CSTR, there was no foaming that occurred in the CSFBR during the whole experimental period. The results all suggested that CSFBR simultaneously provided high treatment capacity and process stability in anaerobic digestion with high-lipid loading.

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Effects of lipid concentration on thermophilic anaerobic co-digestion of food waste and grease waste in a siphon-driven self-agitated anaerobic reactor

Cited by 16 publications

References 33 publications

The role of rice husk biochar addition in anaerobic digestion for sweet sorghum under high loading condition

The role of rice husk biochar addition in anaerobic digestion for sweet sorghum under high loading condition

Anaerobic Digestion, Codigestion of Food Waste, and Chicken Dung: Correlation of Kinetic Parameters with Digester Performance and On-Farm Electrical Energy Generation Potential

Performance Comparison of CSTR and CSFBR in Anaerobic Co-Digestion of Food Waste with Grease Trap Waste

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