A secondary treatment of wastewater are organic compounds in aqueous solution or colloids sector. In General, tend to get treatment. This second stage that "wastewater treatment by biological process" because it is a step that must rely on microbial digestion or destroy dirt in wastewater. Wastewater treatment in therapeutic will present at least nue to this second stage so that the waste water passing through treatment and effluent quality standards that the Government defined. Wastewater treatment by process in biology is divided into 2 categories: Processes that use oxygen.- aeration tank- activated sludge process-Rotating disc bio-system.- lagoon A process that does not use oxygen tank system, anaerobic fermentation of sludge tank systems, depending on the type of microorganism that serves to degrade. Advanced treatment to waste water treatment in the second stage and to eliminate some of the dirt remains, such as heavy metal or some germs before you drain the leaves down to the public water source. This advanced treatment is often not performed well due to cumbersome procedures and high expenses. In addition, therapists are intended to bring water treatment and then back again.
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