摘要
根据粉状及球状羟基磷灰石对地下水中氟化物的去除特征，结合除氟技术的需求，组合形成了新型除氟工艺，利用动态中试试验对工艺应用参数进行优化，并对优化后工艺进行长期运行验证试验。结果表明组合除氟工艺组成为澄清反应器（聚合氯化铝（PAC）、粉状羟基磷灰石）＋球状羟基磷灰石过滤＋双层滤料过滤。对沈丘含氟地下水的优化运行参数：絮体浓度为3—5g／L，上升流速为3m／h，混凝剂采用PAC，球状羟基磷灰石过滤层高度不小于0．5m，过滤采用双层滤料过滤，且滤层厚度不小于1．5m。按优化后的运行参数连续运行2个月的结果表明工艺可有效控制出水氟化物浓度低于1．0mg／L，直接运行成本（药剂及动力）约0．30元／m^3。综上所述，基于羟基磷灰石的新型除氟组合工艺可用于地下水中氟离子的去除。
New defluoride process was formed based on fluoride removal characteristics of powder and spherical hydroxyapatite. In addition, pilot test were used to optimize operation parameter and testify performance of new process. The hybrid process for fluoride removal consists of a clarification tank dosing polyaluminium chloride and hydroxyapatite powder, a fiher of spherical hydroxyapatite and a dual-media filter in sequence. The optimization parameters of this process to the specific groundwater from Shengqiu are as follows： floes concentration is 3 -5 g/L, upflow velocity is 3 m/h, media height of hydroxyapatite filter is more than 0.5 m and media height of dual-media filter is more than 1.5 m. After hybrid process optimized and run over two month, the fluoride of effluent was less than 1 rag/L; meanwhile, the direct cost including power and chemicals was about 0.3 yuan/m^3.
出处
《净水技术》
CAS
2015年第2期52-56,66,共6页
Water Purification Technology
基金
国家自然科学基金(51178159)
新疆自治区科技支疆项目计划(2013911106)
江苏省产学研合作项目(SBY201320569)
关键词
地下水
除氟
聚合氯化铝(PAC)
硫酸铝
羟基磷灰石
优化
ground water defluroination polyaluminium chloride（PAC） aluminum sulfate hydroxyapatite optimization
