Performance Evaluation of the Horizontal Subsurface Flow Constructed Wetland with Ipomoea Aquatica Plant for Rural Domestic Wastewater Treatment

Abstract:

In this study, the performance treatment of horizontal subsurface flow constructed wetland (HSFCW) was evaluated. The HSFCW built as a tertiary treatment process after the biological reactors to improve the effluent quality. The HSFCW system was operated with different hydraulic loading rates (HLRs) ranged from 0.15 to 0.333 m³/ (m².d) to assess their influence on removal efficiency. During the system operation time, the average temperature was ranged of 22.3 to 31.2 °C and pH ranges was 7.3 – 8.1. The Ipomoea aquatica (Chinese spinach) planted into HSFCW system and the growth parameters during the experimental operation observed. The Ipomoea aquatica growth parameters such as the plant height, a fresh and dry weights were monitored and measured. The influent and effluent of chemical oxygen demand (COD), ammonium nitrogen (NH₄-N), total nitrogen (TN) and total phosphorus (TP) were examined. The removal efficiency for all parameters showed decreased with an increase in HLR from 0.15 to 0.333 m³/ (m².day). The results demonstrated that the average removal efficiency of the COD, NH₄-N, TN and TP during system operation is 52.9%, 64.6%, 58.2% and 72.8% respectively. These results confirm that the HSFCW has a good efficient in treatment and can be used for the nutrients and organic matter removal from the domestic wastewater.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 965-969
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.965
• Online since: December 2014
• Authors: Ahmed Mohammed Osman, Xi Wu Lu*
• Keywords: Horizontal Subsurface Flow Constructed Wetland, Hydraulic Loading Rate, Ipomoea Aquatica, Nutrient

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