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Develop.Build.Operate.

Industrial wastewater and waste-to-energy plants, engineered with agentic systems built for the job.

Top-down aerial view of the Circle CBG Meerut plant set within surrounding farm plots
Meerut CBG plant from directly above · owned and operated by Circle CBG

01 · Portfolio

Three businesses. One asset lifecycle.

The same plant seen three ways: the company that owns it, the company that built it, and the firm that engineers it. The operating contribution to each is the same: deep technical expertise, delivered as agentic infrastructure.

  1. 01 Own & operate Minority owner Owns and operates the Meerut compressed-biogas plant: sugar-mill pressmud and cattle manure into renewable gas and organic fertilizer. ContributionTechnical expertise from design through operations, delivered as agentic infrastructure for the plant team. circlecbg.com

    The digester bank from the air: four membrane domes, two open digestate tanks alongside, and the covered pressmud pad beyond · Circle CBG

  2. 02 Build Owner/operator EPC and O&M for industrial wastewater, zero-liquid-discharge and biogas plants, including the Meerut build. ContributionTechnical expertise on its plants, delivered as agentic infrastructure: agents draft, engineers decide. circleh2o.com

    2022, during construction. Vertical reinforcing bars rise around the rim of a concrete tank floor, with workers at the base · Circle CBG

  3. 03 Engineer Founder · Principal Engineer Process engineering for industrial wastewater and waste-to-value plants. ContributionBuilds PuranOS, the agentic infrastructure that carries that expertise into the other two. puranwater.com

    Feed-gas compressor. Boosts cleaned biogas to membrane feed pressure · Circle CBG

02 · Plants

Walk the plants.

Twenty years of industrial water and waste-to-energy work, from gas-plant effluent in Russia to rice-wine stillage in Taiwan and sugar-mill pressmud in India: different feedstocks, different work cultures. Scroll to walk the route; it ends at Meerut, the portfolio’s own plant.

Client projects are anonymized: country only, pins at country level.

Wide oblique aerial of the Circle CBG Meerut plant among farmland
The 12-acre Bahadurpur site from the air, farmland stretching to the horizon. · Circle CBG
  1. RussiaGas-plant effluent

    2007–08

    Gas-processing complex wastewater

    Effluent treatment and water reuse for a gas-processing complex

    Role
    Process engineer; detailed engineering
    With
    UEM
  2. United StatesMunicipal effluent

    2009–11

    Recycled-water plant expansion

    Feasibility and equipment engineering for expanding a recycled-water plant

    Role
    Process engineer
    With
    Parsons
  3. United StatesMunicipal sewage

    2010–11

    Wastewater plant upgrade

    Upgrade engineering: membrane bioreactor and sludge-disintegration evaluations

    Role
    Process engineer
    With
    Parsons
  4. United StatesMunicipal effluent

    2010

    Tertiary treatment for recycled water

    Filtration and disinfection to recycled-water standards

    Role
    Process engineer
    With
    Parsons
  5. CanadaPulp-mill effluent

    2011–16

    Pulp and paper effluent with biogas power

    Anaerobic pretreatment and energy recovery

    Role
    Lead process engineer; field engineer
    With
    UEM
  6. OmanMixed industrial effluent

    2011–16

    Industrial effluent recycling

    Biological treatment and membrane reuse

    Role
    Lead process engineer
    With
    UEM
  7. IndiaPetrochemical effluent

    2011–16

    Petrochemical wastewater

    Anaerobic and aerobic treatment with water reclamation

    Role
    Lead process engineer
    With
    UEM
  8. BangladeshTextile effluent

    2011–16

    Textile effluent treatment

    Membrane bioreactor

    Role
    Project manager
    With
    UEM
  9. United StatesBrewery wastewater

    2016–21

    Brewery resource-recovery plant

    Anaerobic treatment with biogas recovery, design through commissioning

    Role
    Design-build lead: process, construction oversight, controls commissioning
    With
    PurposeEnergy
  10. United StatesBrewery wastewater

    2017–21

    Brewery resource-recovery plant

    Anaerobic treatment with membrane polishing, design through commissioning

    Role
    Design-build lead: process, construction oversight, controls commissioning
    With
    PurposeEnergy
  11. United StatesBrewery wastewater

    2016–21

    Brewery resource-recovery plant

    Anaerobic treatment with biogas recovery, design through commissioning

    Role
    Design-build lead: process, construction oversight, controls commissioning
    With
    PurposeEnergy
  12. TaiwanRice-wine stillage

    2019–24

    Stillage to energy

    Anaerobic treatment with biogas to power; engineered and supplied equipment

    Role
    Process engineering and equipment supply; from 2021 as a subcontractor to PurposeEnergy
    With
    PurposeEnergy · Puran Water
  13. United StatesDairy byproduct

    2021–

    Dairy byproduct to renewable gas

    Anaerobic treatment, gas upgrading and water reclamation

    Role
    Feasibility and engineering advisory
    With
    Puran Water
  14. United StatesBrewery wastewater

    2026

    Brewery wastewater pretreatment

    Pathway study for an anaerobic pretreatment plant

    Role
    Diagnostic and recommendation
    With
    Puran Water

    AgentsPuranOS agents reconciled the plant records and modelled the receiving treatment plant.

  15. MexicoBeverage wastewater

    2025

    Beverage-plant anaerobic reactor

    Reactor internals, design through supply and operations documents

    Role
    Design and supply
    With
    Circle H2O
  16. IndiaTextile effluent

    2020–22

    Common effluent plant upgrade

    Aeration, blower and cooling upgrades for a textile-cluster treatment plant

    Role
    Upgrade engineering and operations support
    With
    Circle H2O
  17. IndiaMunicipal sewage

    2020–21

    Sewage reclamation for reuse

    Membrane bioreactor with controls

    Role
    Process engineering and commissioning
    With
    Circle H2O
  18. IndiaTannery effluent

    2022–

    Tannery effluent, zero liquid discharge

    Membrane bioreactor, reverse osmosis, salt and chrome recovery

    Role
    Process design lead
    With
    Circle H2O
  19. IndiaCattle dung

    2022–24

    Cattle dung to compressed biogas

    Digestion, gas upgrading and compression, with organic fertilizer

    Role
    Process and procurement review; controls
    With
    Circle H2O
  20. IndiaCellulose-plant effluent

    2023–24

    Cellulose-plant effluent, zero liquid discharge

    Membrane bioreactor, ion exchange, high-recovery reverse osmosis and evaporation

    Role
    Process engineering; membrane and controls design
    With
    Circle H2O
  21. IndiaPharmaceutical effluent

    2023–

    Pharmaceutical effluent, zero liquid discharge

    Membrane bioreactor, ion exchange, high-recovery reverse osmosis and evaporation

    Role
    Process engineering
    With
    Circle H2O
  22. IndiaTownship sewage and water

    2024–

    Township sewage and water plants

    Membrane bioreactors and submerged ultrafiltration

    Role
    Process engineering, clean-in-place sizing and control philosophy
    With
    Circle H2O
  23. IndiaHigh-strength biotech effluent

    2024–

    Process effluent to compressed biogas

    Anaerobic digestion, membrane gas upgrading and compression

    Role
    Technology provider: basis of design, P&IDs and vendor reviews
    With
    Circle H2O
  24. IndiaFactory sewage, effluent and water

    2025–

    Factory water, sewage and effluent plants

    Membrane bioreactor; high-recovery reverse osmosis and evaporation; ultrafiltration and nanofiltration for process water

    Role
    Process engineering: P&IDs, bills of quantities, commissioning procedures
    With
    Circle H2O
  25. IndiaIndustrial-estate effluent

    2025–

    Common effluent plant, zero liquid discharge

    Membrane bioreactor retrofit, ion exchange, reverse osmosis and evaporation

    Role
    Basis of design and control philosophy
    With
    Circle H2O
  26. IndiaInfant-nutrition and dairy effluent

    2025–

    Nutrition-plant effluent and sewage

    Flotation, biological nitrogen removal and membrane bioreactor

    Role
    Process design
    With
    Circle H2O

    AgentsAgent-run process models used to test treatment and dosing options before start-up.

  27. IndiaPharmaceutical effluent and process water

    2025–

    Pharmaceutical water and effluent plants

    High-recovery reverse osmosis, ion exchange and zero-liquid-discharge effluent treatment

    Role
    Basis of design
    With
    Circle H2O
  28. IndiaTextile effluent

    2026–

    Textile effluent, zero liquid discharge

    Membrane bioreactor, reverse osmosis and evaporation

    Role
    Basis-of-design lead; process and civil review
    With
    Circle H2O
  29. Meerut, Uttar Pradesh, IndiaPressmud and cattle manure

    2021–

    Pressmud and manure to compressed biogas

    Digestion, gas upgrading, compression and organic fertilizer

    Role
    Minority owner; technical expertise from design through operations
    With
    Circle CBG · Circle H2O

    AgentsA PuranOS maintenance agent supports daily operations. Advice only; people act.

    More of the Meerut plant at circlecbg.com

03 · Systems

Every plant has a second asset: its engineering record.

Built by agents wired into real engineering software, and kept with the plant into operations. Agents draft. Engineers decide.

PuranOS · engineering record

Gas upgrading

Membrane model · source excerpt

Source-code excerpt from the PuranOS membrane model: CO₂ partial-pressure driving force and Arrhenius temperature normalization
Project
Meerut CBG
Produced with
PuranOS
Discipline
Process
Standing
Committed code · no operating values
Two-stage hollow-fibre membrane upgrading skid at the Meerut plant
Steel Two-stage hollow-fibre membrane upgrading skid. Separates CH₄ from CO₂. Circle CBG. Record PuranOS membrane model — CO₂ driving force and temperature normalization. Committed model code excerpt; comments omitted; no operating values.

PuranOS · engineering record

Anaerobic digestion

Dynamic digestion model · source excerpt

Source-code excerpt from the PuranOS dynamic digestion model assembly
Project
Meerut CBG
Produced with
PuranOS
Discipline
Process
Standing
Committed code · no operating values
Anaerobic digesters and feedstock-slurry tankers at the Meerut compressed-biogas plant
Steel Anaerobic digesters and feedstock-slurry tankers, Bahadurpur, Tehsil Mawana. Circle CBG. Record PuranOS digestion model — dynamic model assembly with temperature-resolved kinetics. Committed model code excerpt; comments omitted; no operating values.

PuranOS · engineering record

H₂S removal

Gas-cleaning calculations · source excerpt

Source-code excerpt from the PuranOS gas-cleaning calculations: H₂S load and media breakthrough
Project
Meerut CBG
Produced with
PuranOS
Discipline
Process
Standing
Committed code · no operating values
Hydrogen-sulphide removal vessels at the Meerut plant
Steel H₂S removal vessels. First-stage gas cleaning before membrane upgrading. Circle CBG. Record PuranOS gas-cleaning calculations — H₂S load and media breakthrough. Committed model code excerpt; comments omitted; no operating values.

How PuranOS works

20 yrs
Design-build, 2006–
NY PE
No. 095830
8 countries
North America · Europe · Asia
Cornell
BS ChemE ’06
UC Berkeley
MS CEE ’09

Twenty years across the design, EPC delivery and ownership of industrial wastewater, zero-liquid-discharge and anaerobic waste-to-energy plants in eight countries. The operating contribution to each business: deep technical expertise, delivered as agentic infrastructure.

Experience

  1. 2021–

    Puran Water LLC Greater Boston

    Founder · Principal Engineer

    Process engineering and technology for industrial wastewater and waste-to-value plants, delivered through PuranOS, the firm’s agentic engineering system.

  2. 2021–

    Circle CBG India Pvt. Ltd. Meerut, India

    Minority owner

    Owns and operates a compressed-biogas plant. Contribution: technical expertise from development through construction, commissioning and operations, now delivered as agentic infrastructure that supports the plant team.

  3. Current

    Circle H2O Florida · India

    Owner/operator

    EPC and O&M for industrial wastewater, zero-liquid-discharge and biogas plants. Contribution: technical expertise on its plants, delivered as agentic infrastructure: agents draft the models, drawings and documents; engineers decide.

  4. Current2016–21

    PurposeEnergy, Inc. Greater Boston

    Director of Intelligence (fractional)

    Director of Engineering

    Design-build anaerobic plants for food and beverage producers, from sales through commissioning and operations support.

  5. 2011–16

    UEM, Inc. West Palm Beach, FL

    Process / Project Engineer · minority owner

    International industrial water EPC: lead process engineer and project manager across the Middle East, South Asia and North America.

  6. 2009–11

    Parsons Water & Infrastructure Pasadena, CA

    Process Engineer

    Municipal water and wastewater: recycled water, treatment-plant upgrades and reuse planning.

  7. 2006–08

    UEM, Inc. West Palm Beach, FL

    Process Engineer

    Process design and detailed engineering for industrial water and wastewater, project financial models and biogas emission-reduction work.

Competencies

Process
Anaerobic digestion (IC, UASB, CSTR) · MBR · BNR (IFAS, SBR) · ZLD · UF/RO/NF · biogas to CHP, RNG and CBG
Delivery
FEED packages · procurement and construction management · PLC/HMI commissioning · owner’s engineering · BOO/BOOT financial models
Agentic systems
Multi-agent orchestration · MCP servers for deterministic engineering computation · human approval gates · provenance
Models
QSDsan · WaterTAP · PHREEQC · CoolProp / Thermo / Fluids

Education

  • University of California, Berkeley · 2009
    M.S., Civil & Environmental Engineering
  • Cornell University · 2006
    B.S., Chemical & Biomolecular Engineering, magna cum laude
    AIChE Outstanding Scholar (Twin Tiers Section) · Tau Beta Pi

Patent

  • Selective Gas Extraction to Manage Toxicity and pH in Anaerobic Environments
    WO 2018/140742 A1 (PCT) · Co-inventor, 2018

Publications & talks

  • “Recycled Water for the Sohar Industrial Port Area” — 30th Annual WateReuse Symposium
  • “Recycled Water for Refinery Applications: Challenges, Solutions, and Economics” — WEFTEC (83rd)
  • “Benefiting Bakersfield” — Civil Engineering magazine (co-author)