Bioenergetics’ potential of the poultry and swine wastes in Belgorod region of Russia

Studies of biogas productivity of broiler chicken manure and fattening pig manure collected at the enterprises of Belgorod region of Russia were carried out. The specific yield of biogas from broiler chicken manure was 0,449±0,014 m3/kg of organic matter (oDM), methane specific yield – 0,256±0,008 m3/kg of oDM, from pig manure – 0,300±0,006 and 0,185±0,005 m3/kg oDM, respectively. The annual yield of these substrates in the region was calculated. The energy potential of substrates conversion into biogas was determined: the total yield of electric energy will be 9.339 billion kWh, heat energy - 10.322 billion kWh per year, or 25.585 and 28.279 million kWh per day, respectively.

Modelling of the anaerobic semi-continuous co-digestion of sewage sludge and wine distillery wastewater

The semi-continuous mesophilic anaerobic co-digestion of sewage sludge and wine distillery wastewater was investigated. Co-digestion with wine distillery wastewater enhances biogas productivity of sludge in 25% and swift the rate-limiting step.

Conversion of Agricultural Waste (Maize) into Energy using Biogas Technology

The aim of the study was to examine the biogas and methane yield of maize silage, a wastes in agricultural point of view and compare it to the biogas productivity of commonly used mixture of maize silage and mixed fodder with water. The experimental study was carried out into 2 parts. Firstly, the batch experiment was conducted in Mesophilic conditions (35°C), at five different hydraulic retention times (HRT): 6 DAT, 11 DAT 20 DAT 29 DAT and 41 DAT. The results revealed that maize silage was generated the highest biogas yield of 537 mL /241 mL at the HRT of 6days /41 days. Mixed fodder produced the highest biogas yield of 421 mL at the HRT of 6th days and the lowest one was 252 mL at the HRT of 20th days. Finally, the methane, carbon dioxide and hydrogen sulphide of biogas produced from maize silage and mixed fodder were analyzed using a gas chromatography. The results shown that biogas from maize silage precedes the gas less than the mixed fodder. In the field level experiment proved that from mixed fodder produced gas which would be enough for 7 member’s family used 3 months for the purpose of their cooking.

PENGARUH KOMPOSISI SUBSTRAT CAMPURAN KOTORAN SAPI DAN JERAMI PADI TERHADAP PRODUKTIVITAS BIOGAS PADA DIGESTER SEMI KONTINYU

This study aims to determine the effect of substrate composition on biogas productivity from a mixture of cow dung and rice straw on semi-continuous digester. Rice straw used taken from Way Galih Village, South Lampung, and fresh cow dung was obtained from Laboratory in Department of Animal Husbandry, Faculty of Agriculture, University of Lampung. Biogas starter is filled with 26 liters of cow dung and water in 1: 1 ratio comparison based on weight. Then its being left for 4 day for stabilization. If the biogas production is stable, then substrate will be added with loading rate 0.5 liters / day, with 6 compositions of different cow dung and rice straw from the ratio of cow dung and elephant grass based on the following TS: P1 (75% : 25%), P2 (70% : 30%), P3 (65% : 35%), P4 (60% : 40%), P5 (55% :45%) dan P6 (50% : 50%). Parameters which observed in this study include daily temperature, pH, TS and VS substain, daily biogas volume, biogas productivity, and biogas quality. The results showed that in 6 treatments had the same average pH of 6,8. The average temperatures on the morning were 26,37 °C, 26,29 °C, 26,24 °C, 26,22 °C, 26,28°C, and 26,26 oC while in the afternoon respectively 29,58 °C, 29,47 °C, 29,48 °C, 29,49 °C,2 9,57 °C, and 29,61 oC. The total biogas production is 185,5 liter, 284,25 liter, 186,85 liter, 448,15 liter, and 108,55 liter, respectively for P1, P2, P3, P4, P5 and P6 with biogas productivity sequentially is 378,66 l/kg VSr, 684,87 l/kg VSr, 378,76 l/kg VSr, 1498,02 l/kg VSr, 587,21 l/kg VSr and 395,95 l/kg VSr. The quality of biogas through the flame test produces a bright blue flame color.