Abstract
The objectives of this study were to enhance the production of biogas through using a mixture of cow and chicken manure and to investigate the effect of digested manure on plant growth. Biogas digester consisted of a plastic polyethylene tank with a volume of 0.25 cubic meters. Cow and chicken manures were collected from certified animal and chicken farms. Mixture of manure was prepared by mixing 5 kg of chicken manure and 5 kg of cow manure together in 100 L plastic tank containing 90 L water free from chlorine. Percentage of manure in all cases was 10% (w/v). The manures were transferred to the digesters and kept in greenhouse to insure warm conditions (30°C - 39°C). Produced biogas was measured each two days and digestate samples were taken every two days for pH, EC, BOD, COD determination. Results showed increased biogas production and reached the highest quantity after 28 days and the amount of biogas produced from the mixture of cow and chicken manures was higher than the amount produced from each manure individually. Decreases in pH values were observed during biogas production followed by BOD, COD reduction. On the other hand, increases on EC values were observed. Application of digested manure in agriculture increased yield of lettuce by 75% comparing with the control sample. The study recommended using cow manure mixed with chicken manure to increase the production of biogas and to use the digested manure in agricultural.
Highlights
The volume of the plastic tube for biogas collection was taken as an indicator of system operation
This study showed a simple and easy applicable method for biogas production
Biogas production was tremendously increased by time and reached maximum point after 28 days of operation under laboratory or field conditions
Summary
Laskri and Nedyah [3] studied biogas production from different waste and found that the volume of biogas produced is always a function of the residence time of digestion and the concentration of organic matter in the experiment. Al-Jabri, et al [5] studied the generation of biogas from bio-waste in rural area of Palestine. Maranon, et al [6] evaluated the co-digestion of cattle manure with food waste and study to increase biogas production. They found a decreased methane production when increasing the organic load rate and decreasing high retention time. Previous authors [10] [11] described the construction and production of biomass digesters
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
