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A visit to wastewater treatment plant - Hetauda
by Ashtha Lamsal \| 01-02-2017 17:28 1
Last friday, I had visited Wastewater treatment plant of Hetauda Industrial District(HID) as a partof my field visit with my college mates. there i got chance to gain the knowledge practically which i got theoritically during my regular university classes. The treatment plant is located on the lowland in the northern part of HID and occupies seven bigha and 15 kattha of land. The technology used for water treatment is completely natural with screening of floating objects. There was an emergency tank, nine aerobic and two anaerobic ponds along with the other necessary machineries have been constructed. A 6.8-km long underground sewer and a 10-km long surface sewer have been constructed to transfer the polluted water from industries to the treatment plant. waste water is allowed to pass through grit chamber. Sand grit settle by the force of gravity. then followed by sedimentation tank where silt, clay and organic matter settle down. various algae and micro organisms helps for treating water. Total 98 industries including Bone Processing Pvt Ltd, Hetauda Dairy Distribution Project, Nepal Vegetable Ghee Industry Pvt Ltd, Hisi Polythene Pvt Ltd, Om Textiles Pvt Ltd, Narayani Feeds Industries, United Brewery Pvt Ltd, National Seeds Company, Alkocha CSI Pvt Ltd, Everest Containers, National Soap Industries etc produce wastewater which are treated in the plant. the plant commenced its operation in 2001. It treats waste water of HID for 18 days in different phases. The clean water is then mixed into the Karra river, Rapti-1 and Rapti-2 rivers. It has the capacity to treat 1.1 million litres of waste water in a day.

Dormant user Ashtha Lamsal