Catalytic thermolysis at atmospheric pressure followed by adsorption in treatment of coking wastewater

Abstract

Wastewater generated from the coking processes has high load of organic as well as inorganic pollutants which requires the application of effective treatment techniques. In the present work, treatment of coking wastewater (CWW) through catalytic thermolysis has been carried out in batch mode with varying parameters such as type of catalyst, catalyst mass loading, pH, temperature and time. This process was followed by adsorption as second stage treatment process. The final parameters obtained are as Chemical Oxygen Demand (COD) 20 mg/L, cyanide 0.42 mg/L and nil amount of phenol from the high initial organic and inorganic load. The study aims reduction of COD, phenol, and cyanide content in the wastewater to the permissible limits. The mechanism and kinetics of thermolysis process have been also presented in this study.

Advanced Treatment of Coking Wastewater by Polyaluminum Silicate Sulfate for Organic Compounds Removal

“…Activated sludge process is the most frequently adopted biological treatment, which can effectively remove ammonia and short-chain fatty acids [7]. However, it is difficult for refractory organics such as PAHs and heterocyclic compounds to achieve a high removal efficiency, although some new biological methods have been developed and employed, including powdered activated carbon treatment (PACT) process, photosynthetic bacteria method, combined hydrolytic acidification, and aerobic treatment [2,[7][8][9][10].…”