About Us

M/s Prithvi Eco Sciences (P) Ltd is a biotech company with a strong focal point on enzyme production. The company is committed to be the front-runner in implementing a very unique and comprehensive methodology for amalgamated waste treatment. The technology developed, tried and tested by the company is very robust, yet eco-friendly and to a large extent, go well with sub-continent conditions and the lifestyle of this society. The company has adopted excellent corporate responsibility and to being socially responsible through three integral principles viz., Insight, Inspiration and Involvement along with shaping the business of today and tomorrow. The company's indigenously developed technology enables everything from primary treatment to removal of nutrients in sewage water to advancements in renewable energy sources. Our never-ending exploration of natures potential in its contribution towards corrective measures which takes by itself is an indication of what is possible when nature and technology join hands in ever growing biotechnology field

Natural Endogenous Bio Reactor (NEBR)

The Natural Endogenous Bio Reactor (NEBR) is a specialized bioreactor that uses endogenous respiration to stabilize sewage with minimal secondary sludge generation. NEBR-based sewage treatment plants can be deployed under SBM 2.0 and upgraded to meet stringent NGT norms primarily by enhancing treatment components like NEBR bio media, hydroxidiser, and floating wetland rafts, without major additional civil works. The system is designed for self-sustainability by converting biosolids into value-added products such as nutrient-rich humus and biochar produced using vetiver root biomass.

Principle of Operation

NEBR operates on natural biodegradation in an oxygen-limited environment, where microorganisms eventually consume their own cellular material, resulting in highly stabilized sludge and reduced excess biomass.

  • Aerobic & Facultative Activity
  • Mixed microbial communities carry out aerobic and facultative degradation of organic matter over extended retention times to reduce BOD and COD levels
  • Extended Retention Time
  • Low organic loading and longer hydraulic retention allow biomass to progress into the endogenous phase, lowering sludge yield and improving effluent stability.
  • Controlled Bacterial Culture
  • Fresh bacteria are bred externally and dosed periodically into the reactor, ensuring resilience under high load, toxicity, or variable flow conditions.

Process Flow

The NEBR-based STP integrates mechanical, biological, advanced oxidation, and nature-based polishing units to achieve high BOD removal with low footprint and operational cost.

  • 1. Influent Collection
  • Raw sewage passes through bar screens to remove large debris and a grit chamber to settle dense inorganics, with periodic dosing of a microbial consortium before entering the Anaerobic tank.
  • 2. Anaerobic Tank
  • Anaerobic ammonium oxidation converts ammonia and nitrite directly into nitrogen gas, enabling energy-efficient nitrogen removal and contributing to BOD reduction with low sludge yield.
  • 3. Bio Filtration Area
  • Fixed-film NEBR bio media provides high surface area for biofilm growth, reducing BOD, COD, and suspended solids in the effluent.


  • 4. Hydroxidiser
  • An advanced oxidation unit injects radicals derived from oxygen, and hydroxyl species using microbubble “Micro Trax” diffusers to oxidize recalcitrant contaminant.
  • 5. Phyto-Remediation
  • Hybrid vetiver planted on floating HDPE rafts provides polishing by nutrient uptake, biofilm-driven degradation, and physical filtration of suspended solids.
  • 6. Outfall & Reuse
  • Treated effluent is discharged to a nala, creek, agricultural land, or directed for groundwater recharge, subject to site conditions and regulatory approvals.

Key Components

  • 1. Orgainc +
  • 2. NEBR Bio Media Filter
  • 3. Hydroxidiser & Diffuser
  • 4. Floating Wetland Rafts

Download Drawings

An typical model of Municipality NEBR STP

An typical model of Layout NEBR STP

Contact Form

Please Contact us for any queries

Our Address

Prithvi Eco Sciences Pvt Ltd
Plot No. 122, Survey No. 127, 3rd Phase,
Koorgalli Industrial Area,
Mysuru Karnataka 570018
P: 09845201959/9535890600
Email: info@greeen.in