收录:
摘要:
The effect of temperature on the stabilization of short-cut nitrification and denitrification together with the rates of nitrification and denitrification were studied in a Sequencing Batch Reactor (SBR) treating domestic wastewater. The experimental results demonstrated that real-time control and controlling sludge retention time (SRT = l0d) could realize short-cut nitrification and denitrification. Experiments were carried out by decreasing the temperature of the system whenever the nitrite accumulation reached at least 0.9 (NO2- -N/NOx--N ≈ 1). The system was held at each temperature for at least a month. After six months, the nitrite accumulation exceeded 78.8%, even at 10×1 in winter. The results also showed that temperature had a great effect on the activities of AOB and NOB, especially AOB. The specific ammonia oxidation rate and the specific denitrification rate were 4.49 and 2.91 times higher, respectively, at 26°C than at 10°C. It is obvious that decreasing the temperature had more effect on nitrification than on denitrification in this short-cut system.
关键词:
通讯作者信息:
电子邮件地址: