THE EFFECT OF DIGESTION TEMPERATURE AND THE ORGANIC WASTE TYPE ON THE BIOGAS PRODUCTION
An experimental investigation has been carried out to study the effect of the digestion temperature and the type of organic waste on the biogas production. The experimental work is performed by using three similar lab-scale batch-fed 240 liter biogas reactors. Each of the bioreactors is designed to operate under thermophilic (55 ± 2 °C), mesophilic (40 ± 2 °C) and ambient digestion modes during the same retention time. The paper presents the results of three experimental test runs have been carried out on three different mixtures of organic wastes including pure cattle manure, cattle manure mixed with rice straw and cattle manure mixed with hen manure. Daily measurements are recorded for the generated biogas volumes, pH values, average gas pressure and the ambient temperature during each test run. The results indicate that, total biogas yield in thermophilic mode gives an increase over mesophilic mode by 4％, 6.5％ and 80％ for the first, the second and the third run, respectively. Also, the total biogas production for ambient mode is lower than thermophilic mode by 72％, 80％ and 60％ for the first, second and third run, respectively. The maximum daily biogas yield was obtained at pH values in the range of (8.1 - 8.51) and (7.11 - 8.24) for thermophilic and both of mesophilic and ambient modes, respectively. In addition, it was observed that the maximum biogas yield has been achieved at a value of 9.4％ of total solid content in the slurry.
A. R. El-Ghalban M. A. Abd El-Baky Eng. H. F. Rashad
Mechanical Power Engineering Dept, Faculty of Engineering (Shebin El-Kom), Menoufiya University, Shebin El-Kom, 32511, Egypt
国际会议
大连
英文
106
2012-05-28（万方平台首次上网日期，不代表论文的发表时间）