The effect of different mixing ratio on co-composting of yard trimmings and food waste

2013 ◽  
Author(s):  
Wei Yang ◽  
Fengyao Jin ◽  
Miaoju Chen
Keyword(s):  
Food Waste ◽  
Mixing Ratio

Effects of Mixing Ratio on Dewaterability of Digestate of Mesophilic Anaerobic Co-Digestion of Food Waste and Sludge

2017 ◽  
Vol 9 (1) ◽  
pp. 87-93 ◽  
Author(s):  
Tianfeng Wang ◽  
Pupu Yang ◽  
Xinyun Zhang ◽  
Qi Zhou ◽  
Qiyong Yang ◽  
...  
Keyword(s):  
Food Waste ◽  
Mixing Ratio

scholarly journals Characteristics of Biogas Production from Organic Wastes Mixed at Optimal Ratios in an Anaerobic Co-Digestion Reactor

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6812
Author(s):  
Young-Ju Song ◽  
Kyung-Su Oh ◽  
Beom Lee ◽  
Dae-Won Pak ◽  
Ji-Hwan Cha ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Food Waste ◽  
Methane Yield ◽  
Continuous Reactor ◽  
Mixing Ratio ◽  
Reactor Operation ◽  
Livestock Manure ◽  
Design Expert ◽  
Bmp Test ◽  
Optimal Mixing

This study determined the optimal mixing ratio of food waste and livestock manure for efficient co-digestion of sewage sludge by applying the biochemical methane potential (BMP) test, Design Expert software, and continuous reactor operation. The BMP test of sewage sludge revealed a maximum methane yield of 334 mL CH4/g volatile solids (VS) at an organic loading rate (OLR) of 4 kg VS/(m3·d). For food waste, the maximum methane yield was 573 mL CH4/g VS at an OLR of 6 kg VS/(m3·d). Livestock manure showed the lowest methane yield. The BMP tests with various mixing ratios confirmed that a higher mixing ratio of food waste resulted in a higher methane yield, which showed improved biodegradability and an improved VS removal rate. The optimal mixing ratio of 2:1:1 for sewage sludge, food waste, and livestock manure was determined using Design Expert 10. Using continuous co-digestion reactor operation under an optimal mixing ratio, greater organic matter removal and methane yield was possible. The process stability of co-digestion of optimally mixed substrate was improved compared with that of operations with each substrate alone. Therefore, co-digestion could properly maintain the balance of each stage of anaerobic digestion reactions by complementing the characteristics of each substrate under a higher OLR.

scholarly journals Biogas Production from Anaerobic Co-Digestion of Food Waste Mixed with Domestic Wastewater

2016 ◽  
Vol 855 ◽  
pp. 103-107
Author(s):  
Supaporn Pongthornpruek ◽  
Sumanan Watmuang
Keyword(s):  
Food Waste ◽  
Room Temperature ◽  
Biogas Production ◽  
Swine Manure ◽  
Domestic Wastewater ◽  
Mixing Ratio ◽  
Plastic Container ◽  
Retention Period ◽  
Biogas Yield ◽  
Food Residue

This research was to investigate the potential of biogas production from the co- digestion of canteen wastewater and food waste. Batch experiments were carried out under various substrate ratios1 : 1 : 0, 1 : 1 : 1, 1 : 1 : 2, 1 : 2 : 1, 2 : 1 : 1, 2 : 2 : 1, 3 : 2 : 1, 4 : 2 : 1, 6 : 5 : 1, 8 : 5 : 1, 10 : 3 : 1, 10 : 4 : 1 and 10 : 5 : 1 (canteen wastewater : swine manure : food residue waste) at room temperature. The biogas production was carried for a retention period of 7 days to investigate suitable mixing ratio. The suitable ratio was tested in a plastic container 200 liter with bath and fed-batch experiment for a retention period of 45 days. The results revealed that fermentation slurry mixing ratio of 1 : 2 : 1 was found to be optimum, which gave the methane production with composition 47.34-61 %CH4. The biogas yield and thermal energy were 88.86 L/day and 69 kcal respectively.These primary results indicated the significance of co-digestion of canteen wastewater with food waste for biodegradation and biogas production.

scholarly journals Effect of co-digestion of food waste and cow dung on biogas yield

2020 ◽  
Vol 181 ◽  
pp. 01005
Author(s):  
Makhura Emmanuel Pax ◽  
Edison Muzenda ◽  
Tumeletso Lekgoba
Keyword(s):  
Anaerobic Digestion ◽  
Moisture Content ◽  
Food Waste ◽  
Biogas Production ◽  
Cow Dung ◽  
Mixing Ratio ◽  
Total Solids ◽  
Biogas Yield ◽  
Volatile Solids ◽  
Thermophilic Conditions

This paper aims at finding the effect of co-digestion of cow dung and food waste on total biogas yield. Biogas production was improved through co-digestion of cow dung and food waste (FW) containing a small fraction of inoculum under mesophilic temperature (37ºC) over a retention time of 24 days. Co-digestion ratios of 1:1, 2:1 and 3:1 for cowdung/foodwaste were used for the study on anaerobic digestion on the co digested matter. Tests were carried out starting with the preparation of substrates, substrate characterization to determine the moisture content (MC), total solids (TS), volatile solids (VS) and ultimately batch anaerobic digestion experiments under thermophilic conditions (370C). The moisture content, volatile solids and total solids for food waste were 78, 22 and 90.7% respectively while the characteristics for cow dung were 67.2, 32.8 and 96.0 % respectively. From the study, a mixing ratio of cow dung: food waste of 1:2 was found to be the optimum substrate mixture for biogas production at 25595.7 Nml. The accumulated gas volumes of 18756.6, 14042.5, 13940.8 and 13839.1 Nml were recorded for cow dung: food waste ratios of 2:1, 1:1, 1:3 and 3:1 respectively. For a co-digestion containing more of the food waste than cow dung, a higher volume of biogas is produce.

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