Department;
of;
Chemistry,;
Tongji;
University,;
Shanghai;
200092,;
China;
Department;
of;
Chemistry,;
Tongji;
University,;
Shanghai;
200092,;
China;
Department;
of;
Chemistry,;
Tongji;
University,;
Shanghai;
200092,;
China;
coke; plant; wastewater,; fixed; biofilm,; ammonia; nitrogen,; COD,; HRT,; OLR.;