Keywords: activate sludge, bulking sludge problem, selector application, Thailand, effluent, wastewater treatment, latex rubber industry, seafood industry, carbon removal, selectors, environmental pollution
Actual scale experiment of selector application and the situation of bulking sludge problem in southern Thailand
Activated Sludge Process (ASP) was applied to effluent from factories in southern Thailand. To increase their treatability using a limited land area for the treatment plant, the ASP was mainly designed for carbon removal. A survey of 17 wastewater treatment plants, in the concentrated latex rubber and seafood industries, was conducted. An actual scale experiment of selector application was carried out at a representative treatment plant. The selectors could change the type of filamentous bacteria from type 0041 to type 1851. The parallel type of selectors, gave a better total removal capacity than ASP without selectors.