Hindustan Dorr-Oliver is a major player in India's Water market and has over five decades of experience in executing turnkey EPC projects. Our capabilities include treatment of all types of water and wastewater - raw water, drinking water, sewage, industrial effluent, brakish water and sea water desalination using any kind of technology - conventional, Sequential Batch Reactor (SBR), Membrane Bio Reactor (MBR), De-mineralization (DM), Reverse Osmosis (RO), etc.

We have good presence in nearly all new refineries in India and provide complete water management with zero liquid discharge to our clients.

We have also developed expertise in executing Revamp projects over the years and are one of the most experienced companies to execute Revamps on EPC basis. Revamps are difficult to manage as revamping is done with plants still operational. Thus, safety and planning are two crucial aspects of any successful Revamp project.

Complete water management: with zero liquid discharge for most efficient water usage and least environmental impact. We currently provide this option to refineries and industries in India. We are executing the complete water management project for HPCL Mittal Energy Ltd. (HMEL) Greenfield refinery at Bhatinda. The project includes 130 MLD Raw Water Treatment plant, 12 MLD Effluent Treatment Plant, 21 MLD RO based DM Plant. HDO is integrating latest technologies like SBR, MBR, Sludge Bio-remediation and Volatile Organic Carbon (VOC) to ensure zero discharge and a pollution free refinery, meeting international standards.

Effluent Treatment Plants: HDO has good presence in nearly all new refineries in India. We have the capability and technology to deal with any kind of effluent generated by industries, refineries, fertilizer plants, steel plants, pulp and paper mills etc. Based on the type of effluent, we provide our clients world class effluent treatment system which integrates latest technologies like MBR, SBR, VOC, RO, chemical and biological sludge removal and provide zero effluent discharge system to our clients. Our clientele includes reputed names like IOCL, BORL, BPCL, CPCL, HPCL, HMEL, Tata Chemicals etc.

Sewage Treatment Plants: HDO selectively participates in STPs. We are involved with larger projects that utilize newer technologies and release water that is safe for discharge. HDO had utilized technologies like Activated Sludge Process for clients like Chennai Metropolitan in past. HDO used the latest Sequential Batch Removal (SBR) technology for clients like CIDCO and Coimbatore City Municipal Corporation.

Raw Water Treatment Plants: HDO selectively participates in this area. Most plants in India utilize the conventional methods of water treatment. The first Raw Water Treatment Plant for Chennai Mertopolitan Water Supply and Sewage Board at Redhills of 300 MLD capacity was supplied by HDO on a turnkey EPC basis.

Operation and Maintenance: We also undertake O&M of Raw Water Treatment Plants, Sewage Treatment Plants, Effluent Treatment Plants, RO Systems etc. Our clients include BORL, HPCL, CPCL, CIDCO Khargar, RUIDP Jaipur and Chennai Municipality.

Equipment: HDO supplies its proprietary solid-liquid separation equipment for water and wastewater treatment like Flocculators, Clarifiers, Clariflocculators, Thickeners, Rotary Vacuum Drum Filters, Pre-treator, Screens, Detritors, Aerators etc.