Abstract
Recently, the concerns of sewerage services have been expanded variously other than the original role of stormwater collection, and wastewater disposal and treatment. The consciousness of the officers in charge about environmental care in sewerage systems was investigated through a qustionnaire survey. The main results obtained are as follows.
(1) The importance of environmental care is evaluated almost same as the original indices like the percentage of sewerage service. The municipalities of around 50% of the service rate showed high concern for environmental care.
(2) The main factors of environmental care were effective use of sludge, water quality improvement and evergy-saving. The degree of the satisfaction for their present situation about environmental care was generally low.
(3) The new index of the environmental care for sewerage services was proposed using COD removal rate, energy consumption per unit volume of sewege water and the rate of sludge use, although further improvement will be needed.
