Performance of an Ultraviolet Mutagenetic Polyphosphate-Accumulating Bacterium PZ2 and Its Application for Wastewater Treatment in a Newly Designed Constructed Wetland

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• 作者：Jiang Tian ; Chenlei Yu ; Jiafeng Liu ; Chaoran Ye&#8230
• 关键词：Ultraviolet mutant ; Polyphosphate ; accumulating bacterium ; Total phosphorus removal ; Constructed wetland ; Wastewater treatment
• 刊名：Applied Biochemistry and Biotechnology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：181
• 期：2
• 页码：735-747
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Biotechnology; Biochemistry, general;
• 出版者：Springer US
• ISSN：1559-0291
• 卷排序：181

文摘

Total phosphorus (TP) removal performance and application for wastewater treatment of polyphosphate-accumulating bacteria (PAB) in constructed wetlands (CWs) were investigated. In this study, a novel isolated ultraviolet (UV) mutant PZ2 with phosphate-accumulating ability was screened from domestic wastewater and identified as Pseudomonas putida by 16S ribosomal DNA (rDNA) sequencing analysis. The TP removal performance of PZ2 in the synthetic wastewater reached the highest of 93.95 % within 45 h. Two vertical subsurface flow CWs planted with two aquatic macrophytes Canna indica and Acorus calamus were newly designed. After inoculating PZ2 into two CWs within 45 h, the average chemical oxygen demand (COD), TP, and ammonia-nitrogen (NH₃-N) removal efficiencies reached 68.50, 60.22, and 66.81 %, respectively. Vegetation type and filter size significantly influenced the TP removal capability of PZ2 in CWs. Meanwhile, considerable qualitative differences were found in the pollutant removal efficiencies of PZ2 with and without CWs in synthetic wastewater. These results could also indicate potential applications of the UV mutagenesis in PAB isolation and the newly designed CWs in wastewater treatments.