Effect of Organic Loading Rate and Temperature on the Anaerobic Digestion of Municipal Solid Waste: Process Performance and Energy Recovery

Jiang, Junfeng; He, Shan; Kang, Xueyan; Sun, Yueming; Yuan, Zhenhong; Xing, Tao; Guo, Yufang; Li, Lianhua

doi:10.3389/fenrg.2020.00089

Cited by 28 publications

(9 citation statements)

References 41 publications

(51 reference statements)

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“…Anaerobic digestion/co-digestion is considered as an important tool for the sanitisation of wastes via the inactivation of the zoonotic pathogens occurring in animal manure, and it is well documented that the rate of inactivation occurs faster with increasing temperature from the psychrophilic to the thermophilic temperature range [ 61 ]. In our study, we investigated the co-digestion of a blend of pig manure and pine wood sawdust over a period of seven months.…”

Section: Discussionmentioning

confidence: 99%

Occurrence and Multidrug Resistance in Strains of Listeria monocytogenes Recovered from the Anaerobic Co-Digestion Sludge Contained in a Single Stage Steel Biodigester: Implications for Antimicrobial Stewardship

2023

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L. monocytogenes is a zoonotic foodborne pathogen with inherent adaptability to tolerate environmental and physiological stresses, thereby causing severe disease outbreaks. Antibiotic resistant foodborne pathogens are a challenge to the food industry. A total of 18 samples were pooled from a bio-digester co-digesting swine manure/pinewood sawdust, and evaluated for the occurrence of bacterium plus total viable counts using the spread plate method. The recovered bacterial isolates were presumptively identified by growth on selective medium and confirmed by biochemical characterisation, leading to the isolation of 43 L. monocytogenes. The isolates were characterized based on their susceptibility to antibiotics via the Kirby-Bauer disc diffusion technique against a panel of 14 antibiotics. Equally, the multiple antibiotic resistance (MAR) index was calculated, and MAR phenotypes generated. The bacterial counts were between 102 and104 cfu/mL. Complete susceptibility (100%) was demonstrated to ampicillin, gentamicin and sulfamethoxazole, which are the drugs of choice in the treatment of listeriosis. In addition, intermediate sensitivity occurred at 25.58% to cefotaxime, and the highest resistance (51.16%) was exhibited against nalidixic acid. The MAR index ranged from 0 to 0.71. Overall, 41.86% of the Listeria isolates displayed multidrug resistance, with 18 different MAR phenotypes, demonstrating CIP, E, C, TET, AUG, S, CTX, NA, AML, NI as the greatest MAR phenotype. It can be concluded that the isolates yielding MAR > 0.2 originated from the farm, where antibiotics had been in routine use. Therefore, strict monitoring of antibiotics use in the farm is crucial to mitigate further increase in antibiotic resistance amongst these bacterial isolates.

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Section: Discussionmentioning

confidence: 99%

Occurrence and Multidrug Resistance in Strains of Listeria monocytogenes Recovered from the Anaerobic Co-Digestion Sludge Contained in a Single Stage Steel Biodigester: Implications for Antimicrobial Stewardship

2023

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“…The SMP as demonstrated in CSTR 2 (CD) was slightly above 0.22 LCH 4 /gVS from OLR 6 to 7 gVS/L/d, while SMPs of CSTR 1(FW) were below 0.19 LCH 4 /gVS. At OLR 5 and 5.5 gVS/L/d, CSTR 1 (FW) and CSTR 2 (CD) began to inhibit, which could be attributed to an inhibition of methanogens, where the system was shocked due to changes in the OLR that affected the methanogenic activities [68][69][70]. This meant that the OLR was increased too suddenly from 5 gVS/L/d to 6 gVS/L/d, and it caused overfeeding of the microorganisms in the reactor, causing the reaction to be slower.…”

Section: Summary Of the Performance For Semicontinuous Systemmentioning

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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“…EU 9 (inoculum blank) did not show any biogas production. According to Jiang et al [38] and Park et al [39], the amount of available feed is a key factor for the maintenance of optimal conditions for the anaerobic process and biogas production. This segmentation Fig.…”

Section: Biogas Productionmentioning

confidence: 99%

Evaluation of the Effect of the Application of Combined Pretreatments and Inoculum with High Alkalinity on Food Residues Through BMP Tests

2022

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The management and control of food waste is currently seen as a growing concern, anaerobic digestion is a promising alternative for the valorization of food waste. This study evaluates the effect of the application of three pretreatments (grinding, pH control, thermal treatment) and organic load control, employing a high alkalinity inoculum for methane production through BMP tests, using a Taguchi L8 experimental design of 4 factors and 2 levels, resulting in the best performance (65.91 NmL •g -1 TVS) with pretreatment conditions of grinding with fine particle size, pH 11, thermal pretreatment at 60 °C and a concentration of 14 g TVS •L -1 ,w h i c h represents an improvement of 34.66% in comparation with the food waste without pretreatments.

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Effect of Organic Loading Rate and Temperature on the Anaerobic Digestion of Municipal Solid Waste: Process Performance and Energy Recovery

Cited by 28 publications

References 41 publications

Occurrence and Multidrug Resistance in Strains of Listeria monocytogenes Recovered from the Anaerobic Co-Digestion Sludge Contained in a Single Stage Steel Biodigester: Implications for Antimicrobial Stewardship

Occurrence and Multidrug Resistance in Strains of Listeria monocytogenes Recovered from the Anaerobic Co-Digestion Sludge Contained in a Single Stage Steel Biodigester: Implications for Antimicrobial Stewardship

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

Evaluation of the Effect of the Application of Combined Pretreatments and Inoculum with High Alkalinity on Food Residues Through BMP Tests

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