CSIR-NEERI has been instrumental in designing and commissioning Common Effluent Treatment Plants (CETPs) for homogenous and heterogeneous industrial clusters in the country. CETPs designed and commissioned by CSIR-NEERI at various industrial clusters helped in prevention of water and soil pollution. 767 small scale industrial units in Pali, 249 in Balotra, and over 2000 industrial units in NCT of Delhi revived due to CETPs and as a result the employment of thousands of workers was protected, since these industrial units were on the verge of closure due to non-compliance of the pollution prevention norms. CETPs also helped in achieving ‘Economics of Scale’ in waste treatment, thereby reducing the cost of pollution abatement. CSIR-NEERI has carried out feasibility assessment studies of CETPs including identification of types and volumes of wastes generated, estimation of future waste loads, identification of treatment options, and evaluation of cleaner technologies. It has provided treatment options for zero liquid discharge for wastewater management for CETPs of textile industries in Tirupur and Ludhiana. Recently, the Institute has developed a two-stage bio-oxidation (TSB) process for treatment of high COD and ammonia bearing wastewater through ‘separated heterotrophic-autotrophic reactions’. This process eliminates chemical treatment and denitrification step. TSB process is implemented at Nagarjuna Agrochemical Limited, Srikakulam, A. P. The Institute has also developed an electro-oxidation process for pre-treatment of recalcitrant wastewater from chemical industries to improve its biodegradability. The process achieves biocompatible wastewater. The process has been implemented at CETP in Nandesari, Gujarat.  CSIR-NEERI developed a design for the treatment and zero discharge of treated effluent of automobile industry through High Rate Transpiration System (HRTS) and this technology has been implemented at M/s Mahindra Vehicle Manufacture Limited, Pune. The Institute has developed a ‘phytorid wastewater treatment technology’ which involves a constructed wetland exclusively designed for the treatment of municipal, urban, agricultural and industrial wastewater. This technology has been implemented by various industries in the country.


The Institute received the Special Technology Award from CSIR for the studies that were conducted for providing the critical and integrated technological solutions to tanneries in Tamil Nadu that were closed due to non-conformance with environmental norms. The timely S & T intervention led to recommissioning of tanneries, thereby averting unemployment of weaker section of workforce and loss of substantial foreign exchange from exports.


Consultancy Areas

Wastewater Treatment and Management:

  • Basic Engineering Design for Wastewater (ETP s & CETPs)
  • Renovation & Up-gradation of Effluent Treatment Plants Infusing Modern Process and Treatment Technologies.
  • Zero-discharge Based Wastewater Treatment Technologies for Various Industries and Technologies to Facilitate Compliance with Discharge Norms
  • Physico-chemical Conversions
  • Bioconversions
  • Recycle & Reuse
  • Resource Recovery


Research Areas

Innovative Treatment Technologies for Color & COD Removal and Induction/enhancement in Biodegradation through:

  •   UV Photocatalysis
  •   Detoxification & Biodegradation
  •   Solar Photocatalysis
  •   Color removal
  •   Electrochemical Methods
  •   Electrooxidation
  •   Electrocoagulation
  •   Electrofloatation
  •   Electro-Fenton Process
  •   Catalytic Wet Oxidation
  •   Ozonation
  •   Solid-liquid Separation Through Modification in Design of Clarifiers
  •   Hydraulic Energy Dissipation
  •   Minimization of Turbulence 
  •   Nutrient Removal

Spin off Areas


  •    Scale-up of Wastewater Treatment Technologies
  •    Modeling of Wastewater Treatment Processes
  •    Removal of Dissolved Solids from wastewater
  •    Removal of Nutrients from Wastewater
  •    Monitoring & Removal of Volatile Organic Compounds
  •    Natural Purification Systems for Wastewater Treatment
  •    Land Application of Treated Wastewater
  •    Recovery of Chemicals from Wastewater and Value-addition   
  •    Disinfection of Water, Sewage & Treated Effluents
  •    Adsorbents for Heavy Metals Removal