潮汐流人工湿地中生物蓄磷的强化及其稳定性

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Abstract Improvement of phosphorus bioaccumulation in a tidal flow constructed wetland (TFCW) and the stability of the system were investigated during domestic sewage treatment. Polyphosphate-accumulating organisms (PAOs) could become dominant populations quickly in a modified TFCW adopting two-time feeding tidal flow operation mode, and phosphorus bioaccumulation of the system could be enhanced accordingly. The introduction of periodical carbon source supplements for phosphorus harvesting was conductive to boot a deeply release of the accumulated phosphorus in PAOs which could avoid excessive accumulation of phosphorus in the system. Meanwhile, the storage of endogenous carbon source within the biofilm increased because of the measure which was conductive to the subsequent biological phosphorus removal and the system stability. As the cycle length for phosphorous harvesting was 30d, the phosphorus removal rate of the TFCW could reach 96.04% during the phosphorus bioaccumulation process. And the phosphorus harvesting efficiency and the supplementary carbon source utilization rate of the TFCW could also achieve 70.45% and 98.22% respectively during the phosphorus harvesting process. In this case, luxury phosphorus uptake by PAOs played the greatest role in phosphorus removal.

Key words： tidal flow constructed wetland (TFCW) phosphorus bioaccumulation phosphorus harvesting polyphosphate-accumulating organisms (PAOs) carbon source

Received: 20 May 2016

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X142

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	Articles by authors
	WANG Zhen
	QI Ran
	LI Ying-ying
	DU Yu-neng
	FAN Shi-suo
	WANG Yi

Cite this article:

WANG Zhen,QI Ran,LI Ying-ying等. Improvement of phosphorus bioaccumulation in a tidal flow constructed wetland and its stability[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(2): 534-542.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I2/534

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