Scholarlink

<p>To address the issue of insufficient carbon sources in biological heterotrophic denitrification and to provide a green and low-cost alternative, this study investigated the feasibility of using bamboo stalks as a carbon source. Five types of bamboo stalks—<i>Phyllostachys pubescens</i> (Pp), <i>Phyllostachys sulphurea</i> (Ps), <i>Phyllostachys nigra</i> (Pn), <i>Dendrocalamus membranaceus</i> Munro (Dm), and <i>Bambusa glaucescens</i> (Bg)—were collected from eastern China. Their carbon release capacities and denitrification potentials were systematically evaluated. The results showed that bamboo contains higher integrated cellulose (59.06%) in bamboo stalks, which is much higher than lignin content (30.88%). A higher integrated cellulose as carbon sources in the initial stage of denitrification can promote the nitrate’s removal. Among the tested bamboo species, <i>Pn</i> and <i>Bg</i> exhibited the highest carbon release rates, at 1.57 ± 0.83 COD·mg·(g·d)<sup>−1</sup> and 1.05 ± 0.13 COD·mg·(g·d)<sup>−1</sup>, respectively, which corresponded to effective nitrate removal performance. When the effluent NO₃⁻-N concentration was 15&#xa0;mg·L⁻<sup>1</sup>, their nitrate removal rates reached 71.53% ± 19.36 and 79.20 ± 21.49%, respectively. However, <i>Pn</i> showed higher nitrogen and phosphorus release (cumulative TN: 1.27&#xa0;mg·g⁻<sup>1</sup>; cumulative TP: 0.048&#xa0;mg·g⁻<sup>1</sup>), along with an elevated COD concentration (63.10 ± 77.86&#xa0;mg·L⁻<sup>1</sup>) in the effluent after denitrification. Therefore, <i>Bg</i> was identified as the most suitable carbon source for biological denitrification due to its balanced performance and lower pollutant release.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on Bamboo Stalks as Green and Low-Priced Carbon Sources for Wastewater Denitrification

  • 期刊论文

  • 发表日期：

    2025年5月24日

查看全文
  • Xiaobing Hu,
  • Xiaoyu Chen,
  • Kaihao Zhai,
  • Weiwei Song,
  • Chaowei Liu,
  • Yue Gao

摘要

To address the issue of insufficient carbon sources in biological heterotrophic denitrification and to provide a green and low-cost alternative, this study investigated the feasibility of using bamboo stalks as a carbon source. Five types of bamboo stalks—Phyllostachys pubescens (Pp), Phyllostachys sulphurea (Ps), Phyllostachys nigra (Pn), Dendrocalamus membranaceus Munro (Dm), and Bambusa glaucescens (Bg)—were collected from eastern China. Their carbon release capacities and denitrification potentials were systematically evaluated. The results showed that bamboo contains higher integrated cellulose (59.06%) in bamboo stalks, which is much higher than lignin content (30.88%). A higher integrated cellulose as carbon sources in the initial stage of denitrification can promote the nitrate’s removal. Among the tested bamboo species, Pn and Bg exhibited the highest carbon release rates, at 1.57 ± 0.83 COD·mg·(g·d)−1 and 1.05 ± 0.13 COD·mg·(g·d)−1, respectively, which corresponded to effective nitrate removal performance. When the effluent NO₃⁻-N concentration was 15 mg·L⁻1, their nitrate removal rates reached 71.53% ± 19.36 and 79.20 ± 21.49%, respectively. However, Pn showed higher nitrogen and phosphorus release (cumulative TN: 1.27 mg·g⁻1; cumulative TP: 0.048 mg·g⁻1), along with an elevated COD concentration (63.10 ± 77.86 mg·L⁻1) in the effluent after denitrification. Therefore, Bg was identified as the most suitable carbon source for biological denitrification due to its balanced performance and lower pollutant release.

Graphical Abstract