Alum sludge-based constructed wetland system for enhanced removal of P and OM from wastewater: Concept, design and performance analysis

作者：Babatunde A O; Zhao Y Q^*; Zhao X H

来源：Bioresource Technology, 2010, 101(16): 6576-6579.

DOI：10.1016/j.biortech.2010.03.066

• Alum sludge
• Constructed wetlands
• Phosphorus
• Tidal flow
• Self organizing maps

The concept, design and performance analysis of a four-stage novel constructed wetland system (CWs) capable of enhanced and simultaneous removal of phosphorus (P) and organic matter (OM) from waste-waters is described. Alum sludge, a largely available by-product of drinking water facilities using aluminium salts as coagulant was used as the media. Under a hydraulic loading rate of 1.27 m(3)/m(2) d and a range of organic loading rate of 279.4-774.7 g-BOD(5)/m(2) d and 361.1-1028.7 g-COD/m(2) d, average removal efficiencies (mean +/- SD) of 90.6 +/- 7.5% for BOD(5) and 71.8 +/- 10.2% for COD were achieved, respectively. P removal was exceptional with average removal efficiency of 97.6 +/- 1.9% achieved for soluble reactive P at a mean influent concentration of 21.0 +/- 2.9 mg/I. Overall, the system holds great promise as a novel CWs for simultaneous removal of P and OM, and at the same time, it transforms alum sludge from a waste into a useful material.

• 出版日期2010-8