Impact of total solids content on anaerobic co-digestion of pig manure and food waste: Insights into shifting of the methanogenic pathway

Wang, Zhongzhong; Jiang, Yan; Wang, Shun; Zhang, Yizhen; Hu, Yuansheng; Hu, Zhen-hu; Wu, Guangxue; Zhan, Xinmin

doi:10.1016/j.wasman.2020.06.048

Cited by 115 publications

(33 citation statements)

References 39 publications

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“…Though the degradation efficiency at 12% TS content was higher than at 15% TS, the biogas production was higher at 15% TS. Similar results were obtained by Wang et al (2020aWang et al ( , 2020b, which reported higher degradation efficiency but lower biogas yield at 5% TS than at 15% TS. Yi et al (2014) also found that high TS content lower than 20% has a positive impact on methane yield.…”

Section: Specific Biogas and Methane Production For Different Tssupporting

confidence: 87%

Kinetic study and optimization of total solids for anaerobic digestion of kitchen waste: Bangladesh perspective

Nasrin

Saha

Nandi

et al. 2021

Water Science and Technology

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Kitchen waste from hotels and homes is one of the major problems for urban and rural environment and could be one of the best sources of renewable energy by producing biogas through anaerobic digestion. A research work was undertaken to assess the methane potential of kitchen waste at different total solids (TS) content. Kitchen wastes such as spoiled rice, brinjal, potato, papaya, tomato, fish and poultry parts etc., which are easily decomposed were selected for this study. Batch experiments were set up under ambient temperature. Kitchen waste was added in the batch digester at different TS content (5, 7, 10, 12 and 15%) and sealed for 146 days until the gas production stopped. Substrate characteristics were analyzed before and after the anaerobic digestion. The highest methane yield was 78.12 L/kg VS at 15% TS content followed by 12, 10, 7 and 5%. Different kinetic parameters were determined using logistic model and the model showed a good fit with the experimental results. After modelling using Minitab®, the optimum TS content for kitchen waste was found to be 14.90%.

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Section: Specific Biogas and Methane Production For Different Tssupporting

confidence: 87%

Kinetic study and optimization of total solids for anaerobic digestion of kitchen waste: Bangladesh perspective

Nasrin

Saha

Nandi

et al. 2021

Water Science and Technology

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“…Food waste (FW), usually from residential, commercial establishments, institutional and industrial sources, is generated at an ever-increasing rate which causing ''waste oil'', ''garbage pig'' and some other problems of food safety [1]. Therefore, the appropriate treatment methods were required.…”

Section: Introductionmentioning

confidence: 99%

“…In laboratory studies, many researchers have explored the anaerobic digestibility of food wastes in systems with different TS contents, but these studies often involve digestion with multiple substrates or only within a narrow TS threshold [10.11]. Although Yi et al controlled the substrate TS of 5% to 20% in the semi-continuous food waste anaerobic digestion reactor, the TS of the entire system was only 4.1% after mixing with the inoculated sludge, which was still wet anaerobic digestion [1]. There was little literature on the performance of FW anaerobic digestion system when TS was greater than 15%.…”

Section: Introductionmentioning

confidence: 99%

Effect of total solids contents on the performance of anaerobic digester treating food waste and kinetics evaluation

et al. 2021

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The effects of total solids (TS) content on the performance of anaerobic digestion (AD) treating food waste (FW) and kinetic characteristics were investigated in mesophilic batch reactors. The results showed that FW could be digested normally in the AD system within the TS of 3%-30%. The volume methane yield of dry-AD increased by 5.2-10.6 times than that of wet-AD and the degradation time of unit substrate was shortened by 35%-71%. The system stability indicators of dry-AD, such as pH, VFA/TA, TAN and salt remain within the suppression threshold after digestion. dry-AD had obvious advantages. The kinetic analysis showed that ADM1 could be used to simulate the anaerobic digestion reactor of FW, and accurately simulated the methane production in different TS systems after calibrating. With the increase of TS, the hydrolysis and methane production showed a tendency to increase first and then decrease, but the decrease rate of hydrolysis was higher than that of methanogene. Increasing TS simultaneously weaken the hydrolysis rate and methanation rate, but the effect on the hydrolysis and acidification phase weaker. The ratio of the hydrolysis rate constant to the methanogenic Monod maximum specific absorption rate (khy/km_ac) was a new perspective to used to evaluate the balance between the hydrolysis stage and the methane production stage. The results show that the khy/km_ac ratio of the 15% TS and 20% TS experimental groups was close to 1. It can be speculated that the system TS between 15%-20% can be used as recommended value in anaerobic digestion engineering design to treat FW. Within this TS range, hydrolysis and methane production dynamics matching, the accumulation of inhibitors is also in a relatively moderate state in the threshold.

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“…Waste incineration is an expensive method and causes health and environmental problems such as the release of toxic chlorinated compounds and dioxins into the atmosphere [7,8]. Land lling also needs enough land and destroys usable foods and contaminates groundwater resources [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…The process has many advantages, including the production of the useful various intermediate organic compounds, the generation of energy in the form of biogas, the production of organic fertilizer, and is a safe method to deal with environmental problems such as water and air pollutions. The organic pollutants can be degraded through the metabolism of anaerobic microorganisms to decrease environmental pollution [7,9] And up to now, the AD technology has been widely applied in many countries for waste treatment [10]. In addition, the produced biogas can be applied as clean renewable energy, and slurry of this process containing abundant nutrients including nitrogen, phosphorus and potassium, has great potential for liquid fertilizer preparation [11].…”

Section: Introductionmentioning

confidence: 99%

Quantitative and qualitative variations of effective parameters on biogas produced from mixed wastes in anaerobic digester: Bench scale

Amouei

Sasi

Amooey

2021

Preprint

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Today, biogas production from municipal solid waste as one of the most important sources of energy supply in the world is increasing. In this study, the potential of biogas production from a mixture of cow dung and catering waste was investigated using a continuous flow anaerobic bioreactor with 60 litres at the Bench scale. Operational parameters such as pH, Carbon to Nitrogen ratio (C/N), mixing ratio of restaurant and cow waste in weight percentage (0:100, 50:50, 70:30, and 100:0), total solids (TS) (%5, %10 and %20), temperatures (35, 45 and 55°C) and oxidation-reduction potential (ORP) were evaluated. The results showed that the maximum yield and percent of the biogas produced from cow manure digestion separately was 1003 ml/day and %52.82. Digestion of the catering waste and cow manure as a mixture showed the best mixing ratio, total solid and temperature is 70:30 (w/w), %20 and 55°C respectively and biogas production yield and percent in this conditions was obtained 5430 ml/day and %74.4 respectively. The ORP obtained in this study is -327 millivolt (mv), which indicates the appropriate conditions of the anaerobic process in biogas production and confirmation of methanogenesis.

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Impact of total solids content on anaerobic co-digestion of pig manure and food waste: Insights into shifting of the methanogenic pathway

Cited by 115 publications

References 39 publications

Kinetic study and optimization of total solids for anaerobic digestion of kitchen waste: Bangladesh perspective

Kinetic study and optimization of total solids for anaerobic digestion of kitchen waste: Bangladesh perspective

Effect of total solids contents on the performance of anaerobic digester treating food waste and kinetics evaluation

Quantitative and qualitative variations of effective parameters on biogas produced from mixed wastes in anaerobic digester: Bench scale

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