DEWATS AT THE MUMBAI METROPOLITAN REGION DEVELOPMENT AUTHORITY OFFICE BUILDING, BANDRA-KURLA COMPLEX, MUMBAI

The Mumbai Metropolitan Region Development Authority (MMRDA) is an important municipal authority which is responsible for the development and approval of development plans at Mumbai.

BACKGROUND:

On 8^th January 2011, an inquiry was received from MMRDA for providing technical consultancy services for the construction of DEWATS for the MMRDA Office Building which was under construction at Bandra-Kurla Complex in Mumbai. The agreement between CDD Society and MMRDA was signed on 7^th February 2012. The detailed project report with final drawings and layout plan was submitted to MMRDA in April 2011. Construction of DEWATS commenced in the February 2012. The volume of wastewater generated for which DEWATS plant was to be constructed was 25 m³.

PROJECT DESCRIPTION

In January 2011, an inquiry was received from MMRDA, Mumbai to conduct a feasibility study for implementation of a SME DEWATS, at its Administrative Office Building which was under construction in the Bandra-Kurla Complex in Mumbai. The first site visit conducted on 30^th January 2011 to obtain basic data from the site for preparation of a detail project report. The information and data collected revealed that the DEWATS plant is to be constructed for about 700 users’ (office staff) and 500 visitors per day. The total water consumption at the MMRDA Office was about 29,000 liters. The water supply is from the Mumbai Municipal Corporation. The wastewater generated was 25,000 liters per day. The total area required for construction of the DEWATS plant was 250 m², which was available.

The construction of office building was started and was expected to be completed by December 2011. As per information received, the construction of DEWATS started in the first week of February 2012. Construction of 4 DEWATS modules was proposed - settler, baffle reactor integrated with anaerobic filter, planted gravel filter and collection tank. The settler, baffle reactor and anaerobic filter were located in the second basement of Administrative Office Building, the planted gravel at stilt level and the collection in the first basement respectively. Construction of settler and baffle reactor is completed up to pipe level and the anaerobic filter is in progress. The treated water will be used mainly for toilet flushing in the Administrative Office Building. To facilitate use of the water for flushing the water will be passed through carbon sand filter after the after planted gravel filter and then collected in the collection tank in the first basement. Beside this, the water will also be reused for irrigating the landscape and garden at the Administrative Office Building. The MMRDA Office Building is designed as Green building, hence, DEWATS will be integrated with solid waste management and rain water harvesting components. This project is strategic for CDD RCO Nagpur, being associated with one of the important  development authorities for Mumbai Metro Region in Maharashtra. In addition, DEWATS is located in a prime locality of Mumbai – the  Bandra-Kurla Complex. Implementation of such a project will open new avenues for DEWATS in Mumbai and largely in Maharashtra.