Effects of polyculture on nutrient removal from residential raw sewage using field-scale artificial floating islands.

• Tác giả: Zhaozhe Chen, Ozeas S Costa, Jiyoung Lee, Audrey H Sawyer
• Ngôn ngữ: eng
• Ký hiệu phân loại: 577.27 Effects of humans on ecology
• Thông tin xuất bản: England : Journal of environmental management , 2025
• Bộ sưu tập: NCBI
• ID: 643560

Tóm tắt

Nutrient pollution poses a significant challenge to global water bodies, particularly from non-point sources due to their diffuse nature. This study investigated the effectiveness of Artificial Floating Islands (AFIs) as a phytoremediation technology to address this issue. We constructed and monitored a field-scale AFI system in the equalization basin of a wastewater treatment plant for preliminary treatment of residential raw sewage. Focusing on a polyculture of two native aquatic plants - Carex comosa (bristly sedge) and Eleocharis obtusa (blunt spike-rush) - we assessed how polyculture influenced nutrient assimilation and evaluated the overall performance of polyculture AFI systems under natural conditions. Our results showed that polyculture simultaneously affected plants' capacity of nutrient assimilation and biomass production. The potential competition within the polyculture systems promoted the growth of C. comosa while suppressing E. obtusa. The enhanced nutrient assimilation in C. comosa plant tissues was mainly attributed to its increased biomass production. Additionally, we observed a negative correlation between pH and the storage of total oxidized nitrogen (NO