Tamil Nadu

Kumbakonam Municipality adopts bio mining, reclaims garbage dump

A path-breaking bio-mining concept has helped Kumbakonam Municipality reclaim a vast area that was used as a garbage dump on the outskirts of the temple town.

With stringent civic waste management, experts feel the time has arrived for bio mining concept and it was only the civic bodies that need to show the resolve to move forward with time and technology.

Garbage dumps, fuming and filled with filth, remain an eyesore for any local body and the problem gets accentuated if the civic body happens to be graded municipality as a lot of toil goes into collection, transportation, and disposal of huge quantum of solid domestic waste every day.

Kumbakonam Municipality, into its 150th year of existence, was searching for acceptable norms of waste disposal and hit on bio mining method that also offered the advantage of landfill reclamation.

The pioneering dump site bio mining concept is a simple, low-tech, quick and environmental friendly measure to remedy old open waste dumps to achieve near zero emission of landfill gases and leach.

“Loosened layers of old waste are sprayed with composting bio cultures and then formed into conventional aerobic windrows on the site. The waste is then sterilised, stabilised, and readied for segregation using machinery as organic and inorganic substances which will be later sent for recycling, re-using or composting,” says Chairman of Zigma Global Environ Solutions K.P. Mutharasu.

The firm is entrusted with bio mining of the municipal dump at Karikulam near here.

The project in Kumbakonam has been established under the Design, Build, Finance, Own, and Operate concept for clearing 1,31,250 cubic metres of civic waste spread over 7.5 acres of land with a capacity to process 350 cubic metres a day.

So far, Zigma Global Environ has cleared 75,000 cubic metres of garbage and reclaimed 3.5 acres of land, according to its Director Nagesh Prabhu.

Detailing the features of the facility, Director Technical A. Rajasekaran said it was an automatic programmable logic control plant aimed at reducing manpower utilisation. The aggregates are collected and segregated through manual and auto modes.

Aggregates such as coconut shells, plastics, wood, rubber, glass, inert, and soil enriching bio earth are collected. While coconut shells and wood are sold as fuel, rubber and glass are sent for recycling industries.

Plastic is supplied to recycling plants and cement plants.

“We intend establishing similar plants throughout the south with a target of clearing dump sites and handing them over to the community as valuable land,” says Mr. Mutharasu.

How it is done

Loosened layers of old waste are sprayed with composting bio cultures

Conventional aerobic windrows are formed

The waste is then sterilised and readied for segregation

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Printable version | Oct 17, 2021 2:26:22 PM | https://www.thehindu.com/news/national/tamil-nadu/kumbakonam-municipality-adopts-bio-mining-reclaims-garbage-dump/article8477773.ece

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