Anaerobic-anoxic-aerobic sequential degradation of synthetic wastewaters |
| |
Authors: | Chakraborty Saswati Veeramani H. |
| |
Affiliation: | (1) Centre for Environmental Science and Engineering, Indian Institute of Technology, 400 076 Bombay, India |
| |
Abstract: | This study was conducted in a continuous three-stage system of anaerobic (R1)-anoxic(R2)-aerobic (R3) reactors with synthetic wastewater containing phenol (1000 mg/L), chemical oxygen demand (COD) (3000 mg/L), CN− (30 mg/L), SCN−(400 mg/L), and NH 4 + -N (600 mg/L) as principal pollutants and well-acclimated heterogeneous microbial cultures. The final effluent was partially returned to R2 with a recycle ratio of 1. Anaerobic stage served to detoxify the feed by removing up to 80% of cyanide. Complete SCN− removal and denitrification could be achieved in the anoxic stage by utilizing phenol as an internal source of carbon. Nitrification efficiency of 93% was obtained in the aerobic reactor. The results demonstrated that the three-stage system can give the desired final treated effluent quality (0 mg/L of phenol, 0.2 mg/L of CN−, 210 mg/L of COD, and 20 mg/L of NH 4 + -N) and that the NO 3 − -N concentration can be lowered by a higher recycle ratio. |
| |
Keywords: | Complex wastewater acclimation anaerobic detoxification nitrification denitrification recycle ratio |
本文献已被 PubMed SpringerLink 等数据库收录! |
|