Effect of flow rate on heavy metal accumulation by rotating biological contactor (RBC) biofilms

被引：24

作者：

Costley, SC ^{[1
]}

Wallis, FM ^{[1
]}

机构：

[1] Univ Natal, Sch Appl Environm Sci Microbiol & Plant Pathol, ZA-3209 Scottsville, South Africa

来源：

JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY | 2000年 / 24卷 / 04期

关键词：

biofilms; rotating biological contactor (RBC); heavy metals; flow rates; biosorption; hydraulic retention time (HRT);

D O I：

10.1038/sj.jim.2900812

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Immobilized biofilms are effective in heavy metal removal. The current studies investigated the use of rotating biological contactor (RBC) biofilms in treatment of a wastewater containing cadmium, copper and zinc, each at a concentration of 100 mg L-1. In particular, the influence of hydraulic retention time (HRT) on metal accumulation was studied. Longer HRTs (>12 h) were associated with greater metal removal than short HRTs, particularly with regard to cadmium and zinc. The system was also shown to operate successfully over an extended period of time, at an HRT of 24 h, with removal efficiencies of approximately 34%, 85% and 57% for Cd2+, Cu2+ and Zn2+ respectively after 5-8 weeks contact.

引用

页码：244 / 250

页数：7

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