Characteristics of Nutrients Removal from Stored Algae Anaerobic Biogas Slurry in Artificial Aquatic Vegetable Wetlands

Abstract:

We constructed artificial aquatic water spinach wetland and studied its characteristics on removing nutrients from stored algae anaerobic biogas slurry. The results showed that, when the hydraulic loading was less than 0.10m3/(m2•d), the removal efficiencies of TN and TP were more than 95%, and the effluent quality met class A standard of Urban sewage treatment plant emission standards(GB18918-2002). The uptake rates of water spinach on TN and TP were 1.31 mg/(g•d) and 0.23mg/(g•d). The uptake by water spinach was the main pathway for artificial wetlands to remove nitrogen and phosphorus. The TN and TP removed by plant uptake accounted for 60% and 98% of the total removal, respectively. The nitrification potential of artificial aquatic vegetable wetland decreased gradually along the flow direction with increasing declination extent, while the denitrification potential first increased and then decreased.

• Periodical: Applied Mechanics and Materials (Volumes 178-181)
• Pages: 777-782
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.178-181.777
• Online since: May 2012
• Authors: Guang Can Zhu, Jin Wei Zhao, Xuan Xuan Zhao, Xi Wu Lu
• Keywords: Artificial Aquatic Vegetable Wetlands, Biogas Slurry, Nitrogen and Phosphorus Removal, Stored Algae, Water Spinach

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