After successfully purifying a three-km-stretch of the Mithi river using a microbial technology as a pilot project,the citys development authority plans to initiate another project along the stretch to clear floating debris.
The Mumbai Metropolitan Region Development Authority (MMRDA) is considering a proposal to instal water booms,widely used to contain oil spills,to obstruct floating debris and make it easier to collect these and clean the river.
The company rendering the microbial technology for us has recently proposed the use of water booms. It will be useful as a lot of water hyacinth needs to be removed. There is also a lot of discharge of plastic and other waste in the Mithi that needs to be cleaned regularly, an MMRDA official said on the condition of anonymity.
The official said the top management is positive about the project and the proposal should also be approved within a month. Installing water booms will cost the MMRDA an additional Rs 15 lakh and once installed,the equipment can be used for around three to four years at least,he added.
Booms can either be used to hold the movement of any impurities,divert the impurities to a collection point,change the course of the contamination or block a sensitive area.
So far,by administering a US-based microbial technology for nearly eight months on a three-km stretch of the Mithi running alongside the plush Bandra-Kurla Complex,the MMRDA has been able to reduce pollutants by 90-95 per cent.
The presence of ammonia,which gives the river its foul smell,has also reduced by 68.4 per cent due to the microbial technology that converts anaerobic elements to aerobic ones and enables the sunlight to act as a natural disinfectant.