Industries such as petrochemicals, refineries and gas processing generate spent caustic streams rich in sulfides, phenols and hydrocarbons, making them some of the most complex and odorous wastewaters to treat. Globally, the refining sector alone produces over 5 million tonnes of spent caustic annually (Source: Hydrocarbon Processing Journal), much of which is either incinerated or stored at high cost. With tightening VOC and odour regulations worldwide and increasing pressure on OPEX optimization, traditional treatment routes are often unsustainable or non-compliant.
WOG Technologies Limited offers engineered spent caustic treatment solutions that neutralize and detoxify high-load streams with optimized CAPEX and minimal ecological impact. Our process design is tailored to influent profile, flow variability and end disposal or reuse requirements.
Key Capabilities:
WOG Technologies Limited integrates conventional and advanced technologies based on influent composition, load and final treatment goals.
Core Solutions Deployed:
Decades of experience treating caustic wastewater from refineries, petrochemical and oleochemical units.
We tailor spent caustic treatment systems for ethylene oxide, cresylic and sulfidic streams.
Integrated with ZLD systems for full water recovery and salt crystallization.
IoT-based controls, odour sensors and SCADA dashboards for centralized management.
Reduce incineration, cut odour issues and ensure global compliance with WOG’s performance-backed spent caustic treatment systems. We engineer solutions for recovery, resilience and regulation.
Our treatment systems use a combination of wet air oxidation and steam stripping, effectively converting sulfides to sulfates while ensuring VOC removal. This allows for safer discharge and reduces incineration demand, making it a more sustainable spent caustic treatment solution.
Yes. WOG’s modular and flexible system architecture allows for the treatment of fluctuating COD, sulfide and phenolic loads in real-time. We deploy adaptive biological polishing and automated pH control to stabilize performance across batches.
Unlike conventional systems, we design refinery-specific spent caustic treatment systems integrating Fenton oxidation, WAO and two-stage stripping, optimized for high-organic and high-sulfide loads with limited downtime and full odour control.
Yes. Depending on the influent profile and treatment route, our system allows for partial alkali recovery and water reuse in utility or scrubbing systems, contributing to your circular economy goals and ESG metrics.
Absolutely. Our spent caustic treatment plants are designed to scale from 20 KLD to over 1000 KLD, with modular add-ons for future expansions. We are a preferred spent caustic treatment system provider for large integrated chemical zones.
