Digestion of frozen/thawed food waste in the hybrid anaerobic solid–liquid system

Stabnikova, Оlena; Liu, X.Y.; Wang, J.Y.

doi:10.1016/j.wasman.2007.05.021

Cited by 49 publications

(29 citation statements)

References 9 publications

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“…On the contrary, a significant effect can be achieved by pre-treatments which did not cross the life cycle of substrate as heating at 120°C or freezing at -80°C (Stabnikova et al 2008b;Ma et al 2010). Qiao et al (2011) shows a slight reduction in the production of biogas (identically with methane) from kitchen waste by the hydrothermal pre-treatment at 170°C for 1 hour.…”

Section: Effect Of Substrate Pre-treatmentmentioning

confidence: 99%

Optimization of anaerobic fermentation of kitchen waste

Dlabaja¹,

Malaťák²

2013

Res. Agric. Eng.

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Dlabaja T., Malaťák J., 2013. Optimization of anaerobic fermentation of kitchen waste. Res. Agr. Eng., 59: 1-8.Anaerobic fermentation is a suitable method of energetic and material utilisation of waste coming from restaurants and canteens. Laboratory experiments of wet anaerobic fermentation were performed in a continuous reactor and in batch reactors under mesophilic conditions. Effects of hydraulic retention time, organic loading rate, period of feeding and recirculation of digestate were examined in the continuous reactor. Effects of substrate pre-treatment (crushing, heating, freezing) were examined in the batch reactors. Degree of substrate degradation ranged between 83-85% within hydraulic retention time of 2-30 days. Appropriate organic loading rate was found in the range 2-3 kg of volatile solids per m 3 /day. Recirculation of digestate (both an inoculum for fresh substrate and replacement of fresh water supply)caused an increase in ammonia concentration and led to immediate inhibition of the process. The results further showed a positive effect of substrate pre-treatment in the initial phase of fermentation. However, degree of degradation did not show a significant increase for the period of 20 days of fermentation.

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Section: Effect Of Substrate Pre-treatmentmentioning

confidence: 99%

Optimization of anaerobic fermentation of kitchen waste

Dlabaja¹,

Malaťák²

2013

Res. Agric. Eng.

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“…Anaerobic digestion consists of a few stages including hydrolysis, acidogenesis, acetogenesis and methagonesis. Acidogenesis is involved in the breakdown of the simple sugars, fatty acids and amino acids by acidogenic bacteria into volatile fatty acids and produces ammonia, carbon dioxide and hydrogen sulfide as by-products (Stabnikova et al, 2006). By the freezing and thawing process, the organic acids content increased by 16% with 66% removal of total suspended solids.…”

Section: Organic Acids Recovery and Total Suspended Solids Reductionmentioning

confidence: 99%

“…It also produces low biomass and is able to destroy pathogens (Banarjee et al, 1999). Food waste could be anaerobically fermented to produce volatile fatty acids, aldehydes, alcohols and carbon dioxide (Stabnikova et al, 2006). Rather than being degraded and unexploited in the landfills, food waste can be utilized for many applications such as the production of bioplastics (Sakai et al, 2004), biogas (Zhu et al, 2008), biohydrogen and ethanol productions (Kim et al, 2004), composting (Tsai, 2008;Adhikari et al, 2008) and organic acids production (Ohkouchi and Inoue, 2007;Zhang et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Separation and recovery of organic acids from fermented kitchen waste by an integrated process

Omar¹,

Rahman²,

Hafid³

et al. 2009

Afr. J. Biotechnol.

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Organic acids produced from anaerobic digestion of kitchen waste were recovered using a new integrated method which consisted of freezing and thawing, centrifugation, filtration and evaporation. The main organic acid produced was lactic acid (98%). After the freezing and thawing process, 73% of the total suspended solids were removed and the organic acids were elevated from 59.0 to 70 g/L. The evaporation technique was used to further concentrate the organic acids up to 224 g/L. Using the integrated recovery method, the reduction of the total suspended solids in the solution achieved was about 93%. The material balance for the recovery process was also presented.

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“…Besides the energy balance and techno-economic investigation, environmental aspects i.e., pathogen expulsion, utilization of chemicals, the likelihood for a manageable utilization of the deposits and impacts on human health has to be considered while opting a treatment process (Stabnikova et al, 2008;Thorin et al, 2012;Di Matteo et al, 2017). The solids that are generated after AD process has the potential to be used as soil amendments, which is good for the environment.…”

Section: Environmental Impacts Of Treatmentmentioning

confidence: 99%