Nhan Dan/VNA - Hanoi will have two more waste water treatment plants soon, as part of the second phase of a project on water drainage in Hanoi.

The Japanese consultancy partnership of Nippon Koei-Viwase has conducted a feasibility study on two projects, which are due to be built in Hanoi's suburbs.

The first plant will cover 13 hectares in Thanh Tri district at a cost of JPY 36.1 billion and the second, 6 hectares in Tu Liem district at JPY 39.1 billion.

These two will be the largest of its kind in Hanoi, ensuring waste water treatment for five inner and two suburban districts by 2017.

The project in Thanh Tri has been designed to treat 135,000 cubic metres per day in the first stage and double the capacity in the second. The other one will have a daily capacity of 21,000 cubic metres, which will increase by 3 or 5 fold in the second.

Nguyen Le, general director of the Hanoi sewage company, said the capital city now discharges an estimated 510,000 cubic metre of waste water per day, including a large volume of toxic wastes from industrial zones and hospitals. Yet only between 5 and 7% of the volume is treated by standards measures.

In addition to the above-mentioned projects, Hanoi is preparing to build a large-sized waste water treatment plant inside the Thong Nhat park and the other one by the Yen So lake with financial assistance from a Malaysian group.

The capital city is running two liquid waste treatment stations with limited capacity.