Question

Discuss ( decentralized natural water treatment plant in an urban setting in Oman).

Answer 1

A decentralised water treatment plant uses multiple components like settler, baffled reactor, coarse filter and polishing ponds. Both aerobic and anaerobic treatments are done in this method. The settler takes care of the primary treatment after the water is subjected to pretreatment. The baffled reactor works the secondary treatment. Tertiary treatment is done by the coarse filter, both aerobic and anaerobic treatment. The polishing ponds give the final aerobic treatment. In a country like Oman, where there are more than 400 treatment plants, both government and private owned, it is clear that the investment for water treatment is high. Moreover  most of these treatment plants are small scale with smaller waste water flows, especially those of private establishments like hotels etc. In such cases the decentralised wastewater treatment plant DWWT can be advantageous. They are economical and can be designed based on the site requirements. And they are highly effective for small scale plants. The operation as well as maintenance cost is low and can treat water with high grease and organic matter content, which is quite the case in hotels. Thus this system can be effectively utilised in a country like Oman.