Core Technology
- ORZ- Serial Sorbents and Oil-Removal Process
- Deep Removal of COD
- Resource Treatment Technology for Ammonia-Nitrogen Effluent
- Adsorption Technique for Heavy Metals
- Harmless treatment technology of desulphurization wastewater
- Enhanced treatment technology for phenol ammonia recycle
- Bio-enhanced treatment technology integrated decarburization and denitrification
- High efficiency treatment technology for decyanation and decarburization
- Resourceful treatment technology based on catalytic ozonation
- Water recycle technology based on membrane separation
- Advanced treatment technology for exterior drainage in steel industry
- Waste gas (VOCs) treatment technology
Home > Core Technology > Deep Removal of COD Deep Removal of COD
Introduction
Removal of COD from wastewater is a key technology urgently needed in the environmental protection market in China. Beijing Cycle Columbus Environmental Protection Technology Co., Ltd. has developed a comprehensive method to remove COD from oily raffinate effluent.
The technology contains several steps, such as pretreatment of wastewater to reduce the amount of suspended solid and suspended/emulsified/dispersed oil; adsorption treatment to remove dissolved oil; and advanced oxidation process to deeply remove COD in the wastewater. The COD level of the discharged water is less than 50 mg/L.
Features/Benefits
(1) The COD level of the discharged water is less than 50 mg/L, which meets the standard of “Integrated wastewater discharge standard” (CN-GB 8978-1996);
(2) The sorbents and solvents are easy to regenerate or recycle without any solid waste.
(3) The technology combines physical and chemical method, and the operation cost is less than $1.5 per ton of wastewater.
Application Status
The lab-scale and pilot-scale tests have been implemented in more than ten sites (e.g. Huayou Cobalt, Chaucsun Umicore, Ji’an Xintai Tech.), and the excellent performance is highly praised by the proprietors of cobalt-nickel and rare-earth processing industries.
