About Puran Water
Process engineering for industrial wastewater and waste-to-value projects
We design treatment systems that meet discharge limits and recover value, and we supply the critical equipment that anchors those designs. The work spans conceptual design, feasibility, process engineering packages, design review, technology licensing, and process optimization.
Hersh Kshetry
Founder & Principal Engineer, Puran Water LLC
Hersh founded Puran Water after working all three sides of the industrial-wastewater business: as a consultant designing treatment processes, as an EPC contractor building them, and as the owner/operator of waste-to-value assets running them day-to-day. That arc shapes how the firm approaches every project — design choices are evaluated on lifecycle cost, not just capex.
He writes about AI in EPC workflows, project economics, and the architectural choices behind PuranOS — the firm's schema-first operating model where governed agents draft and engineers decide. Most of the writing lives on the Engineering Insights blog.
What we work on
Industrial wastewater and waste-to-value
The firm sits at the intersection of process engineering, equipment supply, and project economics — which is where most of the lifecycle cost is actually decided.
Strict-discharge treatment
Designs that meet hard limits including Zero-Liquid-Discharge. Process synthesis, sizing, and equipment selection for membrane trains, evaporators, crystallizers, and the pre-treatment that keeps them running.
Resource recovery
Biogas, wastewater reclamation, and organic fertilizer. Same engineering discipline, different objective — the project is judged on IRR and DSCR rather than just compliance.
Process optimization on operating assets
Modeling biological treatment and other industrial processes to find capacity in existing equipment before recommending capex. When expansion is unavoidable, the recommendation is shaped to the actual capacity or quality shortfall, not a generic redesign.
How we work
AI-native, schema-first, audit-trailed
The internal operating model, PuranOS, is published as architecture documentation. We use it to make our own work auditable and to share the approach with other industrial firms working on similar problems.
Deterministic engineering engines
Peer-reviewed open-source simulation engines (WaterTAP, QSDsan, PHREEQC) wrapped as typed MCP tools so calculations are reproducible and auditable, not lost in spreadsheets.
Governed agents draft, engineers decide
Scoped agent personas with tool-level permissions handle the structured work — drafts, datasheets, mass-balance checks. A licensed engineer signs every deliverable.
Lifecycle cost is the lens
Every design decision is evaluated on capex, opex, and the downstream consequences three or five years out — not just the next milestone.
Where we are
Puran Water LLC
300 Baker Ave, Suite 300 – Office 308
Concord, MA 01742
Working on something industrial-wastewater shaped?
Grab a slot on the calendar or send a note. We respond to substantive notes from project developers, EPC teams, and plant owners.