Differences in the treatment efficiency of a cold

Authors: Jingjing Duan Yanfang Feng Yingliang Yu Shiying He Lihong Xue Linzhang Yang

Publish Date: 2016/04/12

Volume: 188, Issue: 5, Pages: 283-

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Abstract

A floating bed system vegetated with Oenanthe javanica was adopted in this study to treat two types of lowpollution wastewater LPW polluted river water PRW and treated domestic wastewater DW The water was treated for 111 days during the lowtemperature season The results indicated that the total nitrogen TN removal rates were higher in the DW groups than in the PRW groups during the initial 30 days This difference may stem from the different C/N ratio of the influent As the water temperature rose above 155 °C after March 12 the purification capability of nitrogen in the DW groups was enhanced and the removal rates of TN were 898 and 768  in DW and the control 2 at 111 days Conversely the performance of total phosphorus TP removal was robust during the initial stage of the experiment despite receiving domestic wastewater with a relatively high N/P ratio 161 The TP removal rates in DW were as high as 915  compared to 789  in PRW at 30 days At the same time the N/P ratios of plant tissue were higher in the DW groups compared to that in the PRW groups Plant uptake played a significant role in nutrient removal in the PRW groups 525  for TN 682  for TP followed by sedimentation In contrast plant uptake only accounted for 253  of TN removal and 241  of TP removal in DW The results provide engineering parameters for the future design of an ecological remediation technology for LPW purificationThis work was financially supported by the Jiangsu Agriculture Science and Technology Innovation Fund No CX142050 the Major Science and Technology Project of Water Pollution Control and Management in China No 2012ZX07101004 the Open Foundation of State Key Laboratory of Soil and Sustainable Agriculture No Y412201428 and the National Natural Science Funds of China Grant No 41501324

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