Not another AI startup — this is deep tech that runs on bacteria.

What do you do when your apartment's "sewage treatment plant" overflows and you discover it's just a fake tank dumping raw waste into a lake?

For Tharun Kumar — former IT architect behind India's Aadhaar system — that crisis became EcoSTP: a sewage treatment system inspired by a cow's stomach that runs on zero power, zero chemicals, and almost no human intervention.

In this episode, we dig into how Tharun left corporate IT to spend a decade "in deep shit," why 100-year-old STP technology never evolved, and how EcoSTP uses anaerobic bacteria and biomimicry to let some clients reuse the same water over 1,000 times. We cover the jargon wall that protected a broken industry for a century, the regulator who first banned his tech and then became his case study, and what it took to scale a licensing model across 24 Indian states plus Bangladesh and the Maldives — all managed from Bangalore.

If the business model and scale story is what you're here for, the whole episode delivers. If you want to jump straight to the science — how cow stomachs inspired a zero-energy treatment system — head to [10:17]. That's where it gets fascinating.

A cleantech and circular economy story that started with a real crisis. Not a pitch deck.

𝗘𝗰𝗼𝗦𝗧𝗣'𝘀 𝗜𝗺𝗽𝗮𝗰𝘁:
→ 8 billion litres of water reclaimed
→ 12,000 tons of coal avoided (no energy-hungry aeration)
→ Startup India's "Most Circular Innovator" — pitched to the Prime Minister of India
→ Phenol-eating bacteria research underway at IIT Jammu — a shot at drinking-quality water from sewage

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🔗 Connect with Our Guest
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Tharun Kumar (LinkedIn): https://linkedin.com/in/tharun/
EcoSTP: https://ecostp.com/

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I'm always keen to meet interesting builders, operators, and investors.
Connect with me on LinkedIn: https://www.linkedin.com/in/arjunthomas

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#cleantech #deeptech #wastewater #circulareconomy #startupindia #ecostp #biomimicry #founderjourney #buildingrealpodcast