Advanced treatment of biologically pretreated coal gasification wastewater by a novel integration of heterogeneous catalytic ozonation and biological process

• DOI: 10.1016/j.biortech.2014.05.061
• Publication Date: 2014-05-23T03:00:14Z
• Authors: Haifeng Zhuang; Hongjun Han; Shengyong Jia; Baolin Hou; Qian Zhao
• Keywords: Sewage; 0211 other engineering and technologies; 02 engineering and technology; Wastewater; 7. Clean energy; Catalysis; 6. Clean water; Water Purification; 12. Responsible consumption; Kinetics; Biodegradation, Environmental; Bioreactors; Coal; Ozone; 13. Climate action; Water Pollutants, Chemical

Advanced treatment of biologically pretreated coal gasification wastewater (CGW) was investigated employing heterogeneous catalytic ozonation integrated with anoxic moving bed biofilm reactor (ANMBBR) and biological aerated filter (BAF) process. The results indicated that catalytic ozonation with the prepared catalyst (i.e. MnOx/SBAC, sewage sludge was converted into sludge based activated carbon (SBAC) which loaded manganese oxides) significantly enhanced performance of pollutants removal by generated hydroxyl radicals. The effluent of catalytic ozonation process was more biodegradable and less toxic than that in ozonation alone. Meanwhile, ANMBBR-BAF showed efficient capacity of pollutants removal in treatment of the effluent of catalytic ozonation at a shorter reaction time, allowing the discharge limits to be met. Therefore, the integrated process with efficient, economical and sustainable advantages was suitable for advanced treatment of real biologically pretreated CGW.