Proposals for the development of the sewage water's and sewage sludge's treatement in Hungary

Abstract

According to the available data and information, the situation of sewage water treatment in Hungary and, similarly to it, in Borsod-Abaúj-Zemplén county is not favourable. Canalization connection up to canals and divertion of sewage water is deficient and situation, degree and efficiency of sewage water treatment is even more unfavourable. Among the problems, collection and treatment of sewage water in case of settlements with less than 2,000 inhabitants are especially important as control, location and utilization of sewage sludge originated as the product of treatment at huge sewage farms too. After having reviewed general situation, we have dealt with these two topics in our dissertation leaning on scientific literature, legal prescriptions and experimental work. On this basis, our proposals are the following: To solve lag of little settlements in the county, we suggest custom-built and natural sewage water treatment instead of sewage water treatment companies because significant rise in soluted material content does not happen in short canals (fast divertion) and sewage water does not begin to rot (smell effection does not occur and mechanical employment of canal reduces). Its consequence is more effective treatment. Natural treatment methods can provide the necessary degree of treatment. There are numerous solutions for necessary treatment of sewage sludge at huge sewage farms from which we can choose according to conditions and circumstances. In our dissertation we propose an other solution whose essence is disintegration of sewage sludge (with or without an additive) before utilization. During this process, sludge is stabilized and can be utilized directly or after composting in the field of agriculture (because of its nutrient content); and the biogases formed during the anaerob treatment of sludge can be devoted to energetic utilization.