HAP结晶法回收生活污水中磷的主要影响因素分析  

ANALYSIS OF MAJOR INFLUENTIAL FACTORS ON PHOSPHORUS RECOVERY FROM DOMESTIC SEWAGE USING HAP CRYSTALLIZATION METHOD

作　　者：王琳杰[1] 余辉[1] 

机构地区：[1]中国环境科学研究院湖泊生态环境创新基地,北京100012

出　　处：《环境工程》2015年第12期5-9,89,共6页Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07101-001)

摘　　要：为了探究羟基磷酸钙（HAP）结晶法应用于生活污水中磷回收的可行性,采用改性珊瑚砂为晶种,考察了晶种投加量、pH值、水力停留时间（HRT）、n（Ca）/n（P）和曝气量对HAP结晶效率的影响。试验结果表明：HAP结晶回收生活污水中的磷,不需要额外加碱调节pH,通过曝气吹脱CO_2而致碱度提高,足以满足HAP结晶对OH-的需求;HRT是影响反应结晶效率的一个较重要的因素,HRT越短,污水磷回收效率越差。室温条件下,当进水磷浓度稳定在3~6 mg/L,HAP结晶法回收生活污水中的磷的最佳运行条件为：pH值为8.3,水力停留时间HRT为6 h,n（Ca）/n（P）为8∶1,曝气量为200 L/h,改性珊瑚砂晶种投加量为83.64g/L。以上结果表明,以改性珊瑚砂为晶种的HAP结晶法应用于生活污水磷回收是可行的。In order to explore the feasibility of hydroxyapatite（ HAP） crystallization method used in recovery phosphorus from domestic sewage,using modified coral sand as the seed,this survey investigated the impacts of dosing quantity,p H value,hydraulic retention time（ HRT）,the Ca / P mole ratio and the aeration rate on HAP crystallization effects. The results showed：HAP crystallization method used in recovery phosphorus from domestic sewage required no additional alkaline,and the aeration stripping CO_2 could increase alkalinity and met the needs of OH-; HRT was more important than the other factors affecting the reaction of phosphorus recovery,and the shorter HRT was,the lower efficiency of phosphorus recovery was; At room temperature,when the concentration of phosphorus in water was stable in 3 ~ 6 mg / L,the optimum operating conditions of HAP crystallization method used in domestic sewage phosphorus recovery were as follows： p H value was about 8. 3,and HRT was 6 h,Ca / P molar ratio was 8∶ 1,aeration rate was 200 L / h,modified coral sand dosage was 83. 64 g / L. The above results showed that the modified coral sand as the seed of HAP crystallization method used in domestic sewage phosphorus recovery was feasible.

关 键 词：HAP 磷回收 生活污水 改性珊瑚砂 

分 类 号：X799.3[环境科学与工程—环境工程]