Enhancement of nitrogen removal via addition of cattail litter in surface flow constructed wetland

Suqing Wu, Lei Gao, Jianya Gu, Weili Zhou, Chunzhen Fan, Shengbing He, Jungchen Huang, Xu Zhang, Yifan Cheng, Ziwei Wu, Ziyu Wang

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Decomposition of aquatic plant litters is an important process in ecological system, which will significantly affect the water environment and internal organisms. In this study, cattail litter was added into surface flow constructed wetland (SFCW) system to utilize as the additional carbon source for denitrification process. The adding method for the litter was determined by evaluating the influence of different adding methods on the water environment (pH, dissolved oxygen) and the litter utilization efficiency. Then, the change of effluent organic concentration (total organic carbon, TOC) and nitrogen removal efficiency of the system was investigated after the litter addition, meanwhile, the microbial community change was analyzed by high-throughput sequencing. The results showed that cattail litter should be added in batches to the SFCW system with the dosage of 0.1 g L−1 d−1, and the TN removal and loading of the system were significantly increased without obvious increase of the effluent TOC. After the litter addition, summer had higher increasing level of the denitrification efficiency of the system, which was lower in winter. This study could provide suitable method for cycling utilization of aquatic plant litters, and improve the denitrification effect of SFCW system.

Original languageEnglish
Pages (from-to)205-211
Number of pages7
JournalJournal of Cleaner Production
Volume204
DOIs
Publication statusPublished - 2018 Dec 10

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • General Environmental Science
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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