India Today - - SAFAIGIRI - —Ro­hit Par­i­har

Udaipur, the city of lakes, was in deep trou­ble with the city’s sewage be­ing dumped into its wa­ter bod­ies. Ini­tial ef­forts at treat­ing the sewage all failed till Hin­dus­tan Zinc Ltd stepped in with a pub­lic-pri­vate part­ner­ship project. In 2014, it launched a 20 MLD sewage treat­ment plant in which it in­vested Rs 170 crore in Udaipur. “Hin­dus­tan Zinc, along with the Ra­jasthan gov­ern­ment, built this sewage treat­ment plant (STP). Now, see­ing the in­creas­ing pop­u­la­tion and re­quire­ment, we are in­creas­ing its ca­pac­ity to 60 MLD. A to­tal of Rs 250 crore ex­pen­di­ture is in­volved and the en­hanced ca­pac­ity will be able to treat al­most 100 per cent of Udaipur’s do­mes­tic sewage,” says Su­nil Dug­gal, CEO of Hin­dus­tan Zinc.

One-third of the city’s sewage is brought to the plant through pipes laid along the nat­u­ral gra­di­ent travers­ing the out­skirts of Udaipur and lo­cated on the banks of the peren­nial Ayar river, says Roop Singh Sarupria, the STP project head. The sewage is treated at a run­ning cost of Rs 1 lakh a day. As a re­sult of this project, peo­ple of the city now have cleaner lakes and cleaner wa­ter. The foun­da­tion stone of three more STPs with a com­bined ca­pac­ity of 40 MLD was laid in June 2017 to treat the rest of the sewage. The con­struc­tion of 40 MLD ca­pac­ity STPs will be based on the Se­quenc­ing Batch Re­ac­tor (SBR) process and have a pro­vi­sion for re-use of 50 per cent treated wa­ter for Udaipur city. In its own pro­jects, Hin­dus­tan Zinc has in­stalled ef­flu­ent treat­ment plants with re­v­erse os­mo­sis at all smelt­ing lo­ca­tions in a bid to im­prove the com­pany’s fresh wa­ter foot­print and also main­tain zero dis­charge sta­tus. This STP is a sig­nif­i­cant step to­wards care for the en­vi­ron­ment and zero dis­charge in the lakes. Still more sig­nif­i­cantly, it en­sures pro­duc­tive us­age of treated wa­ter.


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