Question

What is the cost-benefit relationship regarding sewage treatment as a strategy to fight water pollution?

Answer 1

Sewage treatment is a topic of great concern as unfit water leads to a large number of health issues. Non treated sewage causes rivers and seas to get polluted causing several water borne diseases.

One of the economical ways of treating sewage is the aerobic treatment system. The system consist of reservoirs maintained to be highly oxygenated so that the aerobic bacteria can decompose the organic products.

An aerobic treatment system is a small scale sewage treatment that uses an aerobic process for digestion rather the anaerobic process used in septic tanks. These systems are common in rural areas where there are no public sewers. The aerobic treatment produces a high quality secondary effluent which when sterilized can be used for surface irrigation.