scholarly journals Enhanced biogas yield by thermo-alkali solubilization followed by co-digestion of intestine waste from slaughterhouse with food waste

3 Biotech ◽  
2017 ◽  
Vol 7 (5) ◽  
Author(s):  
S. Porselvam ◽  
N. Soundara Vishal ◽  
S. V. Srinivasan
Keyword(s):  
Food Waste ◽  
Biogas Yield

scholarly journals Biogas potential of organic waste onboard cruise ships — a yet untapped energy source

2021 ◽  
Author(s):  
Kai Schumüller ◽  
Dirk Weichgrebe ◽  
Stephan Köster
Keyword(s):  
Energy Source ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Food Waste ◽  
Energy Demand ◽  
Organic Waste ◽  
Biogas Production ◽  
Biogas Yield ◽  
Cruise Ships ◽  
Detailed Presentation

AbstractTo tap the organic waste generated onboard cruise ships is a very promising approach to reduce their adverse impact on the maritime environment. Biogas produced by means of onboard anaerobic digestion offers a complementary energy source for ships’ operation. This report comprises a detailed presentation of the results gained from comprehensive investigations on the gas yield from onboard substrates such as food waste, sewage sludge and screening solids. Each person onboard generates a total average of about 9 kg of organic waste per day. The performed analyses of substrates and anaerobic digestion tests revealed an accumulated methane yield of around 159 L per person per day. The anaerobic co-digestion of sewage sludge and food waste (50:50 VS) emerged as particularly effective and led to an increased biogas yield by 24%, compared to the mono-fermentation. In the best case, onboard biogas production can provide an energetic output of 82 W/P, on average covering 3.3 to 4.1% of the total energy demand of a cruise ship.

scholarly journals Performance of Food Waste Feeding Pilot Plant Biodigester Operated with Identified Potential Substrate Properties

2021 ◽  
Vol 13 (3) ◽  
Author(s):  
Siti Hajar Yahaya ◽  
◽  
Syafi’ah Nadiah Mohd Said ◽  
Mohd Azhar Zain ◽  
Mohammed Shahrir Mohamad Zahari ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Food Waste ◽  
Pilot Plant ◽  
Cod Removal ◽  
Vegetable Waste ◽  
Process Technology ◽  
Biogas Yield ◽  
Cod Removal Efficiency ◽  
Waste Conversion ◽  
Coconut Meat

Anaerobic digestion has been proven as sustainable process technology for organic waste conversion into renewable bio-energy. This study was conducted to evaluate the performance of mono-digestion process for different types of food waste substrates using pilot scale anaerobic bio-digester (1200 L) in terms of biogas production and the chemical oxygen demand (COD) removal efficiency. The biochemical methane potential (BMP) test of rice waste (R), vegetable waste (VW) and coconut meat residue (CMR) were tested at initial volatile solid (VS) loading of 0.1631, 1.1690, 1.0059 g VS/L, respectively at fixed inoculum/substrate (I/S) ratio of 0.5. Further study conducted by using rice waste (R) in pilot plant anaerobic bio-digester (1200L) for 43 days to investigate the reactor performance in term of COD removal efficiency. Interestingly, inoculum used for this study performs very well and able to digest food waste. Results demonstrate that the maximum specific biogas yield (SBY) was observed from rice waste (R) at 0.0587 L/kg VS compared to other substrates. Specific biogas yield (SBY) of rice waste (R) was 16.01% and 11.92% higher than substrate vegetable waste (VW) and coconut meat residue (CMR) respectively. High COD removal efficiency of pilot plant bio-digester (up to 93 %) using rice waste (R) as sole substrate indicates a good performance of reactor in treating food waste. Conversion of food waste to biogas in pilot plant bio-digester is highly potential as one of the sustainable waste treatment technology.

scholarly journals Physical Properties of Dairy Manure Pre- and Post-Anaerobic Digestion

2019 ◽  
Vol 9 (13) ◽  
pp. 2703
Author(s):  
Hui Wang ◽  
Horacio A. Aguirre-Villegas ◽  
Rebecca A. Larson ◽  
Asli Alkan-Ozkaynak
Keyword(s):  
Anaerobic Digestion ◽  
Physical Properties ◽  
Linear Model ◽  
Food Waste ◽  
Dairy Farms ◽  
Dairy Manure ◽  
Biogas Yield ◽  
Volatile Solids ◽  
Anaerobically Digested Dairy Manure ◽  
Sand Bedding

Manure characteristics change through processing, including anaerobic digestion (AD). These changes can alter handling of manure during downstream operations. This study analyzed the density, total solids (TS) content, and volatile solids (VS) content of pre-digested and anaerobically digested dairy manure from seven dairy farms in Wisconsin. The density of pre-digested manure increased from 990 to 1065 kg m−3 as the TS level increased from 1.5% to 13.0%. Density and TS for pre-digested manure from facilities using separated solids as bedding were related with a linear model for TS ranging from 1.5% to 13.0% and with a polynomial model for TS ranging from 1.5% to 50%. The model shows that density decreases with an increasing TS content when TS is greater than 8.0%. Manure from dairy facilities that used sand bedding had a VS/TS ratio of 0.87. This ratio was higher than the ratio when manure solids were used as bedding (0.81) and when food waste was incorporated into the digester (0.77). This study also provides a simple methodology to estimate biogas yield by using the density of pre- and post-digested manure.

scholarly journals A pilot-scale comparison of mesophilic and thermophilic digestion of source segregated domestic food waste

2008 ◽  
Vol 58 (7) ◽  
pp. 1475-1481 ◽  
Author(s):  
Charles J. Banks ◽  
Michael Chesshire ◽  
Anne Stringfellow
Keyword(s):  
Food Waste ◽  
Pilot Scale ◽  
Gas Production ◽  
Average Weight ◽  
Anaerobic Digesters ◽  
Biogas Yield ◽  
Volatile Solids ◽  
Thermophilic Conditions ◽  
High Alkalinity ◽  
Thermophilic Digestion

Source segregated food waste was collected from domestic properties and its composition determined together with the average weight produced per household, which was 2.91 kg per week. The waste was fed over a trial period lasting 58 weeks to an identical pair of 1.5 m3 anaerobic digesters, one at a mesophilic (36.5°C) and the other at a thermophilic temperature (56°C). The digesters were monitored daily for gas production, solids destruction and regularly for digestate characteristics including alkalinity, pH, volatile fatty acid (VFA) and ammonia concentrations. Both digesters showed high VFA and ammonia concentrations but in the mesophilic digester the pH remained stable at around 7.4, buffered by a high alkalinity of 13,000 mg l−1; whereas in the thermophilic digester VFA levels reached 45,000 mg l−1 causing a drop in pH and digester instability. In the mesophilic digester volatile solids (VS) destruction and specific gas yield were favourable, with 67% of the organic solids being converted to biogas at a methane content of 58% giving a biogas yield of 0.63 m3 kg−1 VSadded. Digestion under thermophilic conditions showed potentially better VS destruction at 70% VS and a biogas yield of 0.67 m3 kg−1 VSadded, but the shifts in alkalinity and the high VFA concentrations required a reduced loading to be applied. The maximum beneficial loading that could be achieved in the mesophilic digester was 4.0 kg VS m−3 d−1.

scholarly journals Monitoring of Food Waste Anaerobic Digestion Performance: Conventional Co-Substrates vs. Unmarketable Biochar Additions

Foods ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2353
Author(s):  
Nour El Houda Chaher ◽  
Abdallah Nassour ◽  
Moktar Hamdi ◽  
Michael Nelles
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Agricultural Waste ◽  
Cost Effective ◽  
Organic Loading Rate ◽  
Experimental Conditions ◽  
Biogas Yield ◽  
Effluent Quality ◽  
Start Up ◽  
Technical Details

This study proposed the selection of cost-effective additives generated from different activity sectors to enhance and stabilize the start-up, as well as the transitional phases, of semi-continuous food waste (FW) anaerobic digestion. The results showed that combining agricultural waste mixtures including wheat straw (WS) and cattle manure (CM) boosted the process performance and generated up to 95% higher methane yield compared to the control reactors (mono-digested FW) under an organic loading rate (OLR) range of 2 to 3 kg VS/m3·d. Whereas R3 amended with unmarketable biochar (UBc), to around 10% of the initial fresh mass inserted, showed a significant process enhancement during the transitional phase, and more particularly at an OLR of 4 kg VS/m3·d, it was revealed that under these experimental conditions, FW reactors including UBc showed an increase of 144% in terms of specific biogas yield (SBY) compared to FW reactors fed with agricultural residue. Hence, both agricultural and industrial waste were efficacious when it came to boosting either FW anaerobic performance or AD effluent quality. Although each co-substrate performed under specific experimental conditions, this feature provides decision makers with diverse alternatives to implement a sustainable organic waste management system, conveying sufficient technical details to draw up appropriate designs for the recovery of various types of organic residue.

Influence of inoculum/substrate ratio on biogas yield and kinetics from the anaerobic co-digestion of food waste and maize husk

2021 ◽  
Vol 16 ◽  
pp. 100558
Author(s):  
H.I. Owamah ◽  
S.C. Ikpeseni ◽  
M.I. Alfa ◽  
S.O. Oyebisi ◽  
S. Gopikumar ◽  
...  
Keyword(s):  
Food Waste ◽  
Biogas Yield ◽  
Substrate Ratio

Enhancement of volatile fatty acid production and biogas yield from food waste following sonication pretreatment

2018 ◽  
Vol 217 ◽  
pp. 797-804 ◽  
Author(s):  
Nuo Liu ◽  
Jianguo Jiang ◽  
Feng Yan ◽  
Yuchen Gao ◽  
Yuan Meng ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Food Waste ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Fatty Acid Production ◽  
Biogas Yield

scholarly journals Performance and Kinetic Model of a Single-Stage Anaerobic Digestion System Operated at Different Successive Operating Stages for the Treatment of Food Waste

Processes ◽  
2019 ◽  
Vol 7 (9) ◽  
pp. 600 ◽  
Author(s):  
Sagor Kumar Pramanik ◽  
Fatihah Binti Suja ◽  
Mojtaba Porhemmat ◽  
Biplob Kumar Pramanik
Keyword(s):  
Experimental Data ◽  
Anaerobic Digestion ◽  
Kinetic Model ◽  
Removal Efficiency ◽  
Food Waste ◽  
Biogas Production ◽  
Gompertz Model ◽  
Methane Yield ◽  
Biogas Yield ◽  
Modified Gompertz Model

A large quantity of food waste (FW) is generated annually across the world and results in environmental pollution and degradation. This study investigated the performance of a 160 L anaerobic biofilm single-stage reactor in treating FW. The reactor was operated at different hydraulic retention times (HRTs) of 124, 62, and 35 days under mesophilic conditions. The maximum biogas and methane yield achieved was 0.934 L/g VSadded and 0.607 L CH4/g VSadded, respectively, at an HRT of 124 days. When HRT decreased to 62 days, the volatile fatty acid (VFA) and ammonia accumulation increased rapidly whereas pH, methane yield, and biogas yield decreased continuously. The decline in biogas production was likely due to shock loading, which resulted in scum accumulation in the reactor. A negative correlation between biogas yield and volatile solid (VS) removal efficiency was also observed, owing to the floating scum carrying and urging the sludge toward the upper portion of the reactor. The highest VS (79%) and chemical oxygen demand (COD) removal efficiency (80%) were achieved at an HRT of 35 days. Three kinetic models—the first-order kinetic model, the modified Gompertz model, and the logistic function model—were used to fit the cumulative biogas production experimental data. The kinetic study showed that the modified Gompertz model had the best fit with the experimental data out of the three models. This study demonstrates that the stability and performance of the anaerobic digestion (AD) process, namely biogas production rate, methane yield, intermediate metabolism, and removal efficiency, were significantly affected by HRTs.

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