分段进水生物接触氧化工艺处理河道污水的试验研究

选择滇池入湖污染负荷最高的大清河为对象,以分段进水生物接触氧化(SFBC)工艺对河道污水开展了分流处理的试验研究,已完成冬季枯水期、春季枯水期及夏季丰水期3个时期的研究.结果表明.SFBC工艺对水质变化具有很好的适应性,调整各时期的运行参数,可以使COD及TP的去除率分别稳定在50%和40%左右,但TN的去除受水温及溶解氧等的影响很大,在逐渐稳定后去除率可达到20%左右.接种活性污泥可以加快装置的启动.但总体去除效果不及来水自然驯化的污泥.随着运行时间延长以及来水带入河道底泥的影响.有无接种污泥在处理效率上的差别逐渐消失.

Pilot Experiment on the Treatment of the River Wastewater by a Step-Feed Biological Contact Process

Abstract: In the Dianchi Lake watershed, the Daqinghe River with the highest load of pollution was chosen as the treatment target, a new step-feed biological contact (SFBC) process was studied to treat the wastewater from the riverway. The pilot experiment was carried out through a winter dry season, a spring dry season and a summer rainy season. The results showed that the SFBC process was well-adapted to the variation of the river wastewater qualities. By adjusting the process parameters in different seasons, the removal rates of COD and TP could be stable at about 50% and 40% respectively; however, the removal rate of TN was influenced by the water temperature and DO greatly, and kept at about 20% when the process went to its stabilization. Seeding with activated sludge could accelerate the start-up of the equipment, but the whole treatment efficiency was not as good as that of the equipment without seeding but domesticating the microorganism in the river wastewater. However, along with the running of the SFBC process as well as the impact of the influent sediment from the river, the difference of the treatment efficiencies between the two equipments of whether or not seeding with activated sludge would disappear gradually.