Development of certain poultry equipment (brooder, incinerator and flamegun) operated on biogas generated by poultry droppings
A. Rajashekher Reddy and P. Praveen
Poultry Experimental Station, LRI
Acharya NG Ranga Agricultural University, Rajendranagar, Hyderabad - 30
Poultry droppings generate 1.5 times more biogas than cattle dung. Biogas is rich in methane with a calorific value of 4750-kilo calories/m 3 and produce smokeless blue flame. There is lack of information on the use of biogas for thermal energy needs by devising certain poultry equipment. Research work was attempted to generate biogas from poultry litter and to develop prototype brooder, incinerator and flame gun. A KVIC model biogas plant of 6m 3 capacity was constructed with necessary modifications for feeding fresh poultry litter. The modifications include pre-digestion tank, agitator in the biogas digester for promoting enzymatic hydrolysis and to avoid scum formation respectively. Fresh poultry droppings (cage birds) 20 kg/m 3 were fed daily to pre-digestion tanks; separated feathers and shell grit/ sand from the mixing tank and maintained a continuous feedstock to the biogas digester. Biogas brooder (40 cft/ hour), incinerator (100 cft / hour) and flame gun (60 cft / hour) with calorific out put of 3,300, 13,700 and 8,200 kcal / hour respectively were developed. The above equipment was used daily and tested for efficacy and safety.
Performance of quail chicks under biogas vs. LPG brooder was compared on the basis of growth rate and livability. Biogas brooding resulted in healthy growth and were unaffected by the residual/ combustion gases. Growth pattern of chicks was similar to that of LPG brooding. The brooding cost was cut down to 50% with biogas brooder. Environment friendly incinerator 100 cft /hour operated on biogas with built in electrical ignition was developed. Airtight combustion chamber was built with refractory lining and made a provision for stack flue gases. Dead bird mass of 2 kg were incinerated daily at 800 o C in about one hour. The flame gun designed to produce a jet like flame of minimum one foot long even at low biogas supply pressure was successfully operated to clear cobwebs and sanitized the poultry shed. Scale up of the biogas plant and biogas based equipment will spare energy input costs in the farm besides protecting the environment.