RESUMEN
Small-scale experimental investigations were undertaken on the anaerobic digestion (AD) and codigestion of livestock waste and industrial biowastes. A simple procedure was developed to rapidly determine the suitability of wastes for digestion. The experiment was split into two phases; initially, the seed (digested brewery waste) was replaced by the test waste over a period of 5 days. During the second phase, the test waste was incubated and monitored for methanogenesis. Dairy cattle slurry was the most efficient co-substrate which, when codigested with pig slurry in an equal ratio achieved volatile solids destruction of 32%, CH(4) production rate of 97.4 ml d(-1), maximum CH(4) content of 61.6% and total gas yield of 2229 ml after 529 h. High fat content wastes were unsuitable for AD due to low pH value and because the dominant microbial reaction was fermentation. Codigestion was investigated to overcome any inhibitions; however, dairy cattle slurry, abattoir wastewater and NaOH additions did not lead to methanogenesis. Treating these wastes by AD is feasible but without CH(4) production.
Asunto(s)
Agricultura , Heces , Residuos Industriales , Eliminación de Residuos Líquidos/métodos , Mataderos , Anaerobiosis , Animales , Bovinos , Chipre , Industria Lechera , Industria de Alimentos , Porcinos , TiempoRESUMEN
This paper summarizes the work carried out for Cyprus in respect to developing guidelines on the measures that have to be taken for the reduction of the impacts caused by the operation of dairy cow farms and in a second stage, to aid the competent authorities in permitting the dairy farms under the Water and Soil Pollution Control Law. The paper includes information on the existing situation in Cyprus in regards to: (1) the operation of the farms, the production of waste and the existing practices for the management of waste, and (2) the guidelines and measures for the reduction of waste, odours and the use of waste in order to ensure the safe and sustainable operation of the farms and the management of waste.