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India’s Largest Okhla STP Awarded to Degremont

Delhi to get 564 MLD STP – India’s Largest

Degremont Suez logo

The Foundation Stone for India’s largest Sewage Treatment Plant (STP) of 56.4 Cr. Litres per day (564 Millions Litres per day (MLD)) was laid on 8th July 2019 at Okhla, New Delhi by Delhi Chief Minister Arvind Kejriwal and Union Jal Shakti Minister Gajendra Shekhawat. This new Sewage Treatment Plant at Ohkla is a Delhi Jal Board (DJB) project. It is in line with Clean Yamuna Campaign and is to be constructed under Yamuna Action Plan-III. It is expected that plant shall have an positive impact on the quality of water in the river Yamuna. The expected cost of the plant is about Rs. 1,161 Cr. and is expected to be completed by 2022. This project has been awarded to Suez Group’s company Degremont.

Present Okhla Sewage Treatment Complex

Delhi Jal Board DJB logo

The present Okhla complex consists of six STPs, namely Phase-I (136 MLD), Phase-II (55 MLD), Phase-III (205 MLD), Phase-IV (168 MLD), Phase-V (73 MLD) and Phase-VI (136 MLD). The present effluent parameters of phase I,II,III & IV are Biological Oxygen Demand (BOD) < 30 mg/l and Total Suspended Solids (TSS) < 50 mg/l. The total capacity of these four phase is 564 MLD / 124 Millions of Gallons per Day (MGD).

The new system shall substitute the above capacity with better effluent parameters. After commissioning of new system, existing phase- I,II,III and IV shall be demolished.

Benefits of the upcoming STP Project

New system of 564 MLD  shall have superior effluent parameters of BOD < 10 mg/l & TSS < 10 mg/l. It shall also have nitrogen and phosphorus removal and disinfection to improve the quality of water. The STP shall have capacity to remove 41,200 kg organic pollutant load per day and 61,600 kg solid load per day from Yamuna. The quality parameters of effluent shall be monitored on-line by Supervisory Control and Data Acquisition (SCADA). This plant shall consist of complete sludge management facility hence generated sludge shall be treated in an eco- friendly manner.

This plant shall cater to 40 lakh residents of various areas such as Chandni Chowk, Kashmere Gate, Nizamuddin, Okhla, Badarpur, Kalkaji, Malviya Nagar, Lajpat Nagar, Greater Kailash and South Delhi – from Munirka to Badarpur etc.