STUDY ON WASTE WATER TREATMENT PLANTS

Biogas is more and more used as an alternative source of energy, considering the fact that it is obtained from waste materials and it can be easily used in cities and rural communities for many uses, between which as a fuel for households. Biogas has many energy utilisations, depending on the nature of the biogas source and the local demand. Generally, biogas can be used for heat production by direct combustion, electricity production by fuel cells or micro-turbines, Combined Hest and Power generation or as vehicle fuel. In this paper we search for another uses of biogas and Anaerobe Digestion substrate, such as: wastewater treatment plants and agricultural wastewater treatment, which are very important in urban and rural communities, solid waste treatment plants, industrial biogas plants, landfill gas recovery plants. This uses of biogas are very important, because the gaseous emissions and leaching to ground water from landfill sites are serious threats for the environment, which grow bigger and bigger during the constant growth of some human communities. That is why, in developed European countries, the sewage sludge is treated by anaerobe digestion, depending on national laws. In our country too, in the last years, efforts were made in the direction of treating wastewaters and management of waste in general. This paper can be placed in this trend of searching new ways of using with maximum efficiency the waste resulted in big communities.