Dry thermophilic semi-continuous anaerobic digestion of food waste: Performance evaluation, modified Gompertz model analysis, and energy balance

Nguyen, Dinh Duc; Chang, Soon Woong; Jeong, Seong Yeob; Jeung, Jae-Hoon; Kim, Sung‐Su; Guo, Wenshan; Ngo, Huu Hao

doi:10.1016/j.enconman.2016.09.066

Cited by 66 publications

(16 citation statements)

References 45 publications

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“…The modified Gompertz model is primarily used to validate cumulative CH 4 generation, which is identified through experimental results. It is the most common model used to model the growth curve of a target [28,29]. The formula used in the modified Gompertz model is as follows (Equation (1)):…”

Section: Kinetic Modelingmentioning

confidence: 99%

Evaluation of Anaerobic Co-Digestion to Enhance the Efficiency of Livestock Manure Anaerobic Digestion

2019

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In this paper, the anaerobic co-digestion of three different organic wastes, including livestock manure, slaughterhouse waste, and agricultural by-products (ABs), was carried out to enhance the efficiency of mono-digestion of livestock manure. The characteristics of co-digestion were evaluated at different mixing ratios. The experiment was performed using the Batch test and was divided into two parts. The first experimental section (EXP. 1) was designed to evaluate the seasonal characteristics of ABs, which are the different ratios of fruits and vegetables, where the mixing ratio of spring (fruits:vegetables = 3:7) showed the highest biogas yield (0.24 m3/kg volatile solids). The second experiment (EXP. 2) was conducted by using ABs in the ratio that gave the highest biogas yield in EXP. 1 in combinations of three wastes livestock manure, slaughterhouse waste, and ABs. The highest CH4 yield was 0.84 m3/kg volatile solids (VS), which was obtained with a mixing ratio that had even amounts of the three feedstocks. In addition, the results of the second biochemical methane potential test, which assessed the digestive efficiency according to the mixing ratio of the three types of organic waste, showed that the CH4 production rate of the merged digestion was approximately 1.03–1.29 times higher than that of the mono-digestion of livestock manure. The results of our experiment were verified using the modified Gompertz model, the results of which were relatively similar to the experimental results.

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Section: Kinetic Modelingmentioning

confidence: 99%

Evaluation of Anaerobic Co-Digestion to Enhance the Efficiency of Livestock Manure Anaerobic Digestion

2019

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“…and highlight the operational conditions (e.g. hydraulic retention time, organic loading rate) that optimise process efficiency [20]. Hence, through reliable simulation outputs, the application of SSMOW for AD can be generalised in the direction of stable and high-yielding biogas production.…”

Section: Introductionmentioning

confidence: 99%

Co-digestion and model simulations of source separated municipal organic waste with cattle manure under batch and continuously stirred tank reactors

Tsapekos

Kougias

Kuthiala

et al. 2018

Energy Conversion and Management

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“…The activities we perform every day in the kitchen or home garden generate huge amounts of waste. A considerable percentage constitute biodegradable waste (up to 50 %), that most often are stored on landfills or are composted [1]. The amount of food waste generated by urban areas has increased significantly in recent years, which, among others, is inextricably linked to a rising standard of living.…”

Section: Introductionmentioning

confidence: 99%

Effect of pH on the Production of Volatile Fatty Acids in Dark Fermentation Process of Organic Waste

Grzelak

Ślężak

Krzystek

et al. 2018

Ecological Chemistry and Engineering S

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The aim of this study was to investigate the effect of pH on the dark fermentation process of kitchen waste by specifying the composition of the volatile fatty acids (VFA), H2 and by drawing the carbon balance. Studies were carried out in 8 dm 3 batch bioreactor in mesophilic conditions. The kitchen waste from the city of Lodz were used as a substrate. Based on the study, it was observed that most of the VFA was produced during the first two days of the process, while in the following days the production was diminished. The highest production of VFA (19.5 g/dm 3 ) was obtained in the bioreactor, where the pH was 7 and 8. Analyzing the produced VFA it was observed that mostly the acetic and butyric acid had been produced. Most of acetic acid (over 70 %) was obtained in fermenter with pH 7 and 8. In contrast, most of the butyric acid (over 40 %) was in the bioreactor with a pH of 6. Production of H2 was in the range from 4.29 to 26.5 dm 3 , wherein the largest amount of H2 was created in the bioreactor with a pH of 6.

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Dry thermophilic semi-continuous anaerobic digestion of food waste: Performance evaluation, modified Gompertz model analysis, and energy balance

Cited by 66 publications

References 45 publications

Evaluation of Anaerobic Co-Digestion to Enhance the Efficiency of Livestock Manure Anaerobic Digestion

Evaluation of Anaerobic Co-Digestion to Enhance the Efficiency of Livestock Manure Anaerobic Digestion

Co-digestion and model simulations of source separated municipal organic waste with cattle manure under batch and continuously stirred tank reactors

Effect of pH on the Production of Volatile Fatty Acids in Dark Fermentation Process of Organic Waste

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