Hyderabad Metro | Odourless Urinals to convert waste into Bio-Fertilizers!

Hyderabad Metro Rail (HMRL) authorities, are planning to install this eco-friendly toilets at the other stations in the city.

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Hyderabad Metro
Odorless urinals at metro station (credit: Nftv Channel)

Hyderabad:  In move to turn metro station green zone, Hyderabad Metro has set up odourless urinals at Miyapur Metro Station. These toilets convert the urine into bio-fertiliser which can then be used at several farms and gardens. The metro authorities are planning to install similar urinals at other metro stations as well.

HMRL MD Mr. NVS Reddy explaining successful working of waterless urinals at Miyapur Metro Station with bio-filtration
HMRL MD Mr. NVS Reddy explaining successful working of waterless urinals at Miyapur Metro Station with bio-filtration (Source: HMRL)

With this move commuters will be able to travel is hygienic environment. Riders will no longer have to close their nose while passing through public toilets at Hyderabad Metro Station.

As per a report publishes in national daily New Indian Express, currently there are three toilets placed at the Miyapur Metro Station. This has been put as part of the experiment to see the feasibility and use of them in totality. The estimated total cost of placing three toilets is around Rs 3 lakh. Apart from Miyapur, other stations where these urinals are operational are Rasoolpura, Kukatpally and JNTU.

Looking at the response and use, the Hyderabad Metro Rail (HMRL) authorities, are planning to install this eco-friendly toilets at the other stations in the city.

How do these toilets work?

As per the system in place that and breaks down the ammonia and urea components of urine and separates water. The urine is filtered as safe water that is directed to a soak pit via a channel. This odourless water can then be used for watering plants or cleaning floors.

The urine is collected in an anaerobic digester, where, in the absence of air, anaerobic microbes debase the urine, decreases stickiness and liquefy the solids. The urine subsequently enters the activated carbon filter, followed by a biofilter.

Explaining the utility of the by-product processed HMRL Managing Director, NVS Reddy shared that the ammoniacal nitrogen in the system is broken by a microbial strain, in which ammonia and nitrogen are separated. The nitrogen can be used as a nutritional supplement for plants and ammonia is used by microbes.

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