摘要
生物填料在污水处理中常用来增加生物量以提高污水的净化效率,同时生物填料的加入会影响曝气氧转移效率。考察了典型的SPR-1生物悬浮填料在清水中对微孔曝气氧传质过程的影响。结果表明,在水深为6.00m时,SPR-1生物悬浮填料有助于促进微孔曝气的氧传质,当填料填充率为40%,单位体积通气量为0.755m3/h时,氧总转移系数(KL a20)和标准氧转移效率(SOTE)提高程度最大,分别为19.32%和5.78%;当水深为2.33m时,SPR-1生物悬浮填料对微孔曝气氧传质有阻碍作用。在实际污水处理过程中,可以根据水深,调节填料填充率来使填料最大限度地促进氧传质。
Biological fillers are commonly employed to improve removal rate of pollutants in wastewater treat ment system. Biological fillers can increase biomass, and also can affect oxygen mass transfer （OMT）. This paper studied effects of SPR-1, a kind of typical biological fillers used in wastewater treatmertt process, on OMT in fine bubble aeration in clean water. The results showed that when the SPR-1 can significantly enhance the OMT at water depth of 6.00 m. The total transfer coefficient （KLa20） and standard oxygen transfer efficiency （SOTE） can reach the highest improvement of 19.32% and 5. 78% respectively when stuffing rate was 40% and ventilation volume was 0. 755 m3/h per unit water volume. However, the SPR-1 was found to hinder OMT when the water depth was 2.33 m. During actual wastewater treatment, biological fillers can enhance OMT through adjusting the stuffing rate based on water depth.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2013年第9期24-27,共4页
Environmental Pollution & Control
基金
国家高技术研究发展计划("863计划")项目(No.2009AA063804)
国家水体污染控制与治理重大科技专项(No.2011ZX07316-001)
关键词
生物悬浮填料
微孔曝气
氧传质
污水处理
biological suspended filler
fine bubble aeration oxygen mass transfer wastewater treatment
