【摘要】 探讨如何提高普通浸没式生物滤池除磷效果为目的 ,采用牡蛎壳为填料 ,通过改变水力停留时间来考察牡蛎壳和陶粒两种填料的浸没式生物滤柱对 CODMn、NH4+ - N以及 PO43 - - P的去除特性。结果表明 ,与陶粒填料相比牡蛎壳填料在对 PO43 - - P的去除方面具有明显的优势 ,牡蛎壳良好的除磷性能主要是通过生物诱导的化学沉淀来实现的。更多还原

【Abstract】 The behavior of phosphorus removal by oyster-shell media was investigated at di fferent HRT and phosphorus concentrations in a submerged bio-filter. The experi ment was carried out in two bio-filter columns packed with oyster-shell and ceramsite media respectively. Both oyster-shell and ceramsite media had sim ilar behavior in the removal of NH 4 +-N and COD\-\{Mn\}, whereas oyster-she ll performed well efficiency in phosphorus removal. It was found that the remova l rate of phosphorus for oyster-shell was up to 70%, which was higher than that (30%) for ceramsite media. It was evidenced that oyster-shell could remove pho sphorus effectively by biologically-induced chemical precipitation.更多还原