摘要
以位于太湖流域的某城市污水处理厂A/O处理工艺的尾水为对象,进行了化学混凝除磷试验。结果表明,无机高分子混凝剂PFS和PAC较其他无机低分子混凝剂具有更好的除磷效果,且铁系混凝剂比铝系混凝剂除磷效果要好,PFS的除磷效果最好,PAC次之;混凝剂投加量为15 mg.L-1时,可使处理后出水TP的质量浓度<0.5 mg.L-1,混凝剂PFS当n(Fe3+)/n(P)为1.25时除磷效果最好,是一种高效的混凝剂,投加量少、成本低;混凝剂和助凝剂联用时,非离子型PAM对PAC和三氯化铁的助凝效果较明显。降低城镇污水处理厂尾水中磷含量,化学除磷方法是一种有效、可行的选择。
The removal of Phosphorus by chemical coagulation was carried out for the A/O treatment water in a municipal sewage treatment plant situated in the Taihu Lake Basin.The results showed that inorganic macromolecules coagulant PFS and PAC had a better effect on phosphorus removal compared with other inorganic molecules coagulants.And phosphorus removal effect of iron-based coagulants was better than aluminum-salt coagulants.Among the coagulants,phosphorus removal efficiency of PFS was best,PAC took the second place.When the coagulant dosage was 15 mg·L-1,the treated wastewater TP was less than 0.5 mg·L-1.PFS and phosphorus molar ratio（as n（Fe3＋）/n（P）） was 1.25.PFS was an efficient coagulant with low dosage and low cost.When coagulant combined with flocculant,coagulation aid action of the non-ionic PAM for PAC and ferric chloride coagulant was obviously.Chemical phosphorus removal process can be a simple and effective method to reduce the phosphorus content of the end of the water in urban sewage treatment plants.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第6期50-53,58,共5页
Technology of Water Treatment
关键词
化学除磷
城镇污水
除磷混凝剂
除磷工艺试验
chemical phosphorus removal
advanced phosphorus removal in urban sewage
phosphorus removal coagulants
phosphorus removal process
