Influence of temperature on a biological contact oxidation process by combined packing treating high-salt wastewater

摘要

In order to solve the high salinity of coastal pier ballast wastewater treatment problems, experimental study on the simulation of integrated synchronous contact oxidation process. In the chloride ion concentration of 20000 mg/L, Dissolved Oxygen (DO) is 5-6 mg/L, PH conditions for the next 7 to 8. four reactors simultaneously and synchronously running, HRT was 24h, 36h, 48h and 60h, investigated temperature treatment effect in the range of 18~27°C system. The results show that at 18°C, the system of COD removal can reach more than 95%, the effluent concentration is less than 50 m/L; run at 27°C for 20 days, HRT was 24h, the reactor ammonia removal reached 96.3%; total nitrogen with temperature change is more obvious when the water temperature changes in 18~27°C, after 90 days of operation, total nitrogen from 30-35 mg/L reduced to 20 mg/L or less, and eventually stabilize at 15 mg/L around. Through the study of this paper, it can provide effective technical support for the treatment of other high salinity wastewater problems.