Semi-continuous anaerobic digestion of solid poultry slaughterhouse waste: effect of hydraulic retention time and loading

Salminen, Esa; Rintala, Jukka

doi:10.1016/s0043-1354(02)00010-6

Cited by 176 publications

(76 citation statements)

References 21 publications

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“…Fluctuating behavior caused difficulties in stabilizing the experiments with high VS add-up in the feed (in experiments 4, 8, 6, 2, 10). Similar behavior has been reported previously [29][30][31] . On the other hand, bio-gas and methane yields decrease with increased in organic loading rate from 1.5 to 4.2 kgVS/m 3 day (see also Fig.…”

Section: Effect Of Olr On Responsesupporting

confidence: 91%

Process Optimization and Modeling of Anaerobic Digestion of Cow Manure for Enhanced Biogas Yield in a Mixed Plug-flow Reactor using Response Surface Methodology

Rasouli⃰¹,

Ajabshirchi²,

Mousavi³

et al. 2015

Biosci., Biotech. Res. Asia

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Pilot scale experiments were performed on the digestion of dairy cow manure in a semi-continuous process using a mixed plug flow reactor (MPFR) to determine the effects of organic loading rate (OLR), temperature and mixing levels on production biogas and methane yield. Response surface methodology (RSM) was applied for the design and analysis of experiments with the optimization of OLR, temperature and mixing level during the biogas production process. Experiments were designed as per the central composite design technique. Four cubic mathematical models were derived for prediction of the responses. The optimization study has been carried out to identify the highest yields achievable when the factors temperature and mixing are minimized. In process optimization, maximum values of biogas production and methane yield were achieved as 0.570 m 3 /m 3 day and 0.113 m 3 /kgVS added, respectively, with an OLR of 3.15 kgVS/m 3 day, temperature of 37.66 °C and mixing regime of 20.32 rpm for 10 min per 2 hours.

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Section: Effect Of Olr On Responsesupporting

confidence: 91%

Process Optimization and Modeling of Anaerobic Digestion of Cow Manure for Enhanced Biogas Yield in a Mixed Plug-flow Reactor using Response Surface Methodology

Rasouli⃰¹,

Ajabshirchi²,

Mousavi³

et al. 2015

Biosci., Biotech. Res. Asia

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“…When studying the codigestion of dairy cattle manure and discard oil in batch biodigesters, Orrico et al (2016) observed reductions of 47.53% of TS and 51.28% of VS. While Salminen & Rintala (2002), in an experiment of anaerobic biodigestion of poultry slaughter residues in biodigesters kept at a constant temperature of 31ºC, observed reductions of 63; 31; 74 and 76% in four different concentration loads and four retention times (13, 25, 50 and 100 days, respectively). Orrico Júnior et al (2010) justified the largest VS reductions due to the maintenance of the temperature of the biodigesters (31ºC) and the longer times retention.…”

Section: Resultsmentioning

confidence: 97%

Biogas Production From Dairy Cattle Manure, Under Organic and Conventional Production Systems

et al. 2017

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ABSTRACT:The purpose of this study was to evaluate the production of biogas, as well as the biogas production potential resulting from the anaerobic biodigestion of dairy cattle manure under organic (CMOS) and conventional (CMCS) production system. Also, the concentration of thermotolerant coliforms was evaluated after the biodigestion process. Therefore, bench biodigesters prototypes were supplied with CMOS and CMCS for 30 weeks. The experimental design was completely randomized with four repetitions for each treatment. Analysis of total solids (TS), volatile solids (VS), biogas production potential, most probable number (MPN) of thermotolerant coliforms were made. The cumulative biogas production was 6.18 L and 11.15 L, when using the CMOS and CMCS, respectively. Average biogas production potential of CMCS were 0.2; 2.6 and 2.9 L kg -1 substrate, ST and SV added, respectively and for CMOS 0.1; 1.4 and 1.9 L kg -1 substrate, ST and SV added, respectively. After the anaerobic biodigestion process of CMOS and CMCS, it was observed that the concentrations of thermotolerant coliforms were well below than the limit established by law.

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“…The addition of trace elements, nutrients or alkalinity is commonly practiced in many laboratory anaerobic digestion studies on wastewaters that are known to be deficient in certain nutrients (Takashima and Speece, 1990), or in batch studies, but in many cases no addition of other compounds is practiced, especially on studies with continuous feeding of diverse mixed feedstocks (Carucci et al, 2005, Fernandez et al, 2005 Salminen and Rintala, 2002). Also, micronutrient supplementation in commercial operations is not commonly practised as the minimisation of costs is favoured.…”

Section: Role Of Trace Elementsmentioning

confidence: 99%

Anaerobic digestion of catering wastes: effect of micronutrients and retention time

Climenhaga

Banks

2008

Water Science and Technology

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Source-separated foodwastes collected from a campus catering facility were processed in bench-scale single-stage anaerobic digesters. The feedstock contained a varied mix of fruits, vegetables, meats and fried foods. A constant organic loading rate (OLR) was maintained with differing hydraulic retention times (HRT). Regular addition of trace elements or prolonged retention time allowed stable digestion at high total volatile fatty acid (TVFA) levels. Reactors on HRT of 25, 50, and 100 days with no micronutrient supplementation exhibited methanogenic failure after approximately 40, 100 and 90 days respectively, while duplicate reactors with micronutrient supplementation maintained stable digestion. An extended HRT of 180 days has so far allowed continued digestion (for reactors with and without micronutrient supplementation) at levels of ammonia nitrogen exceeding 5.7 gl -1 and volatile fatty acid levels exceeding 15 gl -1 , usually considered inhibitory or toxic. Keywords Anaerobic digestion; catering wastes; micronutrients; foodwastes IntroductionFood wastes from domestic kitchens, commercial catering establishments and retail outlets represent a waste stream that holds significant potential as a resource for anaerobic digestion. This study used wastes from an institutional catering facility, containing high quantities not only of readily-degradable starches and sugars, but also more slowly-degradable lipids, as well as proteinaceous materials. The results indicate that a feedstock of pure foodwaste may not contain all nutrients required to meet microbial metabolic requirements.

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Semi-continuous anaerobic digestion of solid poultry slaughterhouse waste: effect of hydraulic retention time and loading

Cited by 176 publications

References 21 publications

Process Optimization and Modeling of Anaerobic Digestion of Cow Manure for Enhanced Biogas Yield in a Mixed Plug-flow Reactor using Response Surface Methodology

Process Optimization and Modeling of Anaerobic Digestion of Cow Manure for Enhanced Biogas Yield in a Mixed Plug-flow Reactor using Response Surface Methodology

Biogas Production From Dairy Cattle Manure, Under Organic and Conventional Production Systems

Anaerobic digestion of catering wastes: effect of micronutrients and retention time

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