A PROCESS FOR PRE-TREATING COKE OVEN EFFLUENT USING SONICATION AND A SYSTEM FOR CARRYING OUT SUCH PROCESS.

摘要

The present invention is directed to a process for pre-treatment of coke oven effluent using sonication of reaction solution adapted to reduce/ eliminate the toxicity level, along with associated recalcitrance of the wastewater. Importantly, sonication of coke oven effluent is carried out using an ultrasonic generator and ultrasonic transducer of 100W power and frequency of 40kHz at a temperature in the range of 35-40°C maintaining pH level of 8.3-8.7 of influent/reaction solution. Advantageously, the sonic process for treatment of effluent generated from coke making can reduce recalcitrance without needing recurrent consumables. The system and method of the pre-treatment is capable of achieving under optimal operating conditions 50% degradation in cyanide level and 25% degradation in COD level. The process favours oxidation of target radical without dosing of any conventional chemical or coagulant making it a cost effective, reliable and efficient process for coke oven wastewater pre-treatment with the possibility of wide application in industry.