寒冷天气下新型复合式生物生态系统与曝气生物滤池组合工艺处理生活污水的协同作用(英文)

A lab-scale integrated treatment system including the novel sequence bio-ecological process (SBEP) and biological aerated filter (BAF) for a sewage mixture (chemistry laboratory wastewater and domestic sewage) was presented in this paper. The main objective of the study was to test the contribution of artificial aeration, recir-culation ratio and mass concentration of steel slag on pollutant removal in winter when the plants are dormant. It had been shown that SBEP and BAF play different roles in removing contaminants from wastewater. During the airflow experiment, the removal efficiency of COD and TP in SBEP was higher than that in BAF, whereas BAF can compensate for the deficiency of SBEP where no significant improvement on ammonium nitrogen removal is ob-served. Yet, the removal efficiencies of COD, TP and -N in SBEP could be improved apparently when differ-ent recirculation ratio or various mass concentration of steel were applied. Especially, when the airflow of 0.06 L·h 1, the recirculation ratio rate of 80% and the mass concentration of steel of 2.2-2.4 g·L 1 were applied, the highest efficiency of 94.6%, 77.9% and 80.7% for COD, TP and -N were achieved, respectively. The inte-grated treatment system of SBEP and BAF was proved to be an effective wastewater treatment technique and a bet-ter alternative to treat domestic sewage.