LAW CAPACITY WASTEWATER TREATMENT PLANTS

The question of small water users having no centralized wastewater collecting, cleaning and discharging system is of maximal actuality in Romania. Therefor economically efficient solutions are looked for. For disperse mountain villages, farms, or detached households traditional systems, with high maintenance expences because of long networks for small flows, can be economicaly not advantageos. Very small capacity treatement plants are a solution for such cases. The aim of the experimental part of the present work is to simulate situations, damages which can occur during running of a low capacity wastewater treatement plant. Low capacity hosehold wastewater treatement plants are economic alternatives which remove the disadvantages of emptyable basins namely the high costs, the frequvent empying operations, with unpleasant smelling, continous danger of groundwater infection, need for massive and expensive concrete buildings. The proposed plants are based on a classical treatement technology and need emptying of the exess mud only once or twice a year. In opposition with the case of classical plants, the mixture extracted from the proposed low cost systems does not smell and has a relatively low content of solid matter

RATIONAL WATER MANAGEMENT – PART OF ECOLOGIC ECONOMY AND SUSTAINABLE DEVELOPMENT. A CASE STUDY IN ARAD COUNTY, ROMANIA

Problems of water management as part of sustainable development are discussed, withspecial regard to Arad County situated in the Western part of Romania. Legal backgroundand results of consequent activity are presented. Quality of underground and surface wateris discussed

ENVIROMMENTAL PROBLEMS IN TODAY ECONOMY OF ARAD COUNTY

The economics - ecology relationship is discussed with special focus on Arad County. The research is focused on problems of air quality, as the other environmental factors were in focus in the autors’ previous papers. Problems connected to sulfur dioxide, nitrogen oxides, volatile organic substances, ammonia emissions are emphasized. One of the main problems is considered to be that connected to the greenhouse effect producing gases

SOME ECONOMIC AND ECOLOGIC ASPECTS OF WASTE MANAGEMENT IN A MIDDLE SIZED TOWN

Regulations of the European Union establish for local authorities obligations concerning waste management inside their area of competence. Carrying out these obligations need to connect result in economic and municipal fields to those in environment protection. After a short presentation of these obligations the paper contains a study of waste management in Lipova, a middle sized town in Arad County, Romania. The study is focused mainly on the waste dump of the town, which is planned to be shut down during the following years. This makes necessary to carry out preparing concerning waste management in the new conditions and also to assure environment protection on the actual emplacement after shutting down the existing dump