生物滤池同步净化低温高铁锰氨氮地下水

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Abstract A pilot-scale bio-filter was constructed for the removal of high concentrations of iron (TFe:9~15mg/L, Fe²⁺:6~12mg/L), manganese (Mn²⁺:0.8~1.2mg/L), and ammonia nitrogen (NH₃-N:0.9~1.4mg/L) simultaneously from low temperature (5~6℃) groundwater. Pilot-scale bio-filter were started separately by using the 1.0m/h and 3.0m/h were started successfully after 128d and 91d, respectively. Iron and ammonia nitrogen were removed at the beginning of the bio-filter start-up, Mn removal remains a decisive factor in filter maturity. The required thickness of the bio-filter required for purification increased as the concentration of ammonia nitrogen increased when dissolved oxygen (DO) was sufficient. The maximum removal of ammonia nitrogen was about 1.60mg/L. DO deficiency was the main factor limiting the further increase of ammonia nitrogen. For higher filtration rates, the removal of manganese was less, and the thicker the filter layer required for purification. The maximum filtration rate of the single bio-filter was 8.0m/h. Analysis along the way, there were significant removal classification between Fe and Mn during the oxidation-removal process, iron and ammonia nitrogen in the filter layer can be oxidized and removed simultaneously, manganese is oxidized and removed after the iron and ammonia nitrogen.

Key words： low temperature high iron manganese and ammonia nitrogen groundwater simultaneous purification dissolved oxygen thickness of filter layer

Received: 17 January 2019

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X523

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	Articles by authors
	WANG Liu-yu
	LI Dong
	ZENG Hui-ping
	ZHANG Jie

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WANG Liu-yu,LI Dong,ZENG Hui-ping等. Simultaneous purification of high-iron,manganese and ammonia nitrogen from low temperature groundwater in biological filter[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(8): 3300-3307.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I8/3300

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