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 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.
