摘要
以酚和氨氮作为微污染原水模拟污染物研究了生物砂滤池同时去除微污染原水浊度和微量污染物的可行性和工艺特征。当滤速为８ｍ／ｈ，过滤周期为１２ｈ滤池进水酚浓度为０．０２５ｍｇ／Ｌ、ＮＨ＿４￣＋－Ｎ浓度为１ｍｇ／Ｌ，浊度为１０－１５度时，生物砂滤池出水酚浓度低于０．００２ｍｇ／Ｌ，酚平均去除率大于９２％；出水ＮＨ＿４￣＋－Ｎ浓度基本为零；出水浊度低于１．４度。生物砂滤池中生物量分布从上而下逐渐减少，砂粒表面生物膜平均厚度为１０．７μｍ，在砂滤料表面保持超薄生物膜是生物砂滤池的主要特征。
: Using the synthetic water composed of phenol and ammonia the feasibility and technical process to remove turbidity and trace pollutants simultaneously from the slightly polluted raw water by biological sand filter (BSF ) are studied . When the syn - thesis water with phenol and NH4- N contents of 0. 025 and 1 mg / L respectively and turbidity of 10 - 15 NTU charged into the BSF facility with filtrating velocity of 8 m /h at a run time of 12 hours, more than 92% removal of phenol has been obtained with residual <0. 002 mg / L , the turbidity and the NH-N levels of the BSF effluent are lower than 1. 4 NTU and near to zero respectively. The distribution of microbes in BSF descendes from the top to bottom, the thickness of biofilm averages 10. 7 μm at the surface of sand granule. It is the super thin biofilm growing on the surface of sand media plays the important role of BSF.
出处
《给水排水》
CSCD
北大核心
1997年第7期6-9,共4页
Water & Wastewater Engineering
