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<p>In this research, the filamentous algae algal–bacterial granular sludge (ABGS) was cultured and utilized to contrast the treatment performance of municipal wastewater with that of aerobic granular sludge (AGS). Larger grain size, as well as higher biomass content, was achieved with a substantial increase in algal content in the ABGS, without significant loss of settleability. The genus of <i>Stigeoclonium</i> (from phylum Chlorophyta) was found to flourish as the dominant algae in the ABGS systems. A notable enhancement in granular stability was observed. The integrity coefficient of ABGS was merely 0.25–0.27, in contrast to 0.58 for AGS. This reduction in the integrity coefficient of ABGS decreased the likelihood of particle disintegration. Due to algae growth, ABGS had a better nutrient removal efficiency of 76.5–77.9% for nitrogen and 80.3–82.3% for phosphorus. Meanwhile, a 2.1 times lipid content enrichment was also obtained in ABGS, apparently with the growth of <i>Stigeoclonium</i> and <i>Navicula</i> (from phylum Bacillariophyta). This study may provide meaningful information for the use of such filamentary ABGS techniques in practice.</p>

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The Potential Effect of Filamentous Stigeoclonium on the Algal–Bacterial Granular Sludge System in Treating Municipal Wastewater

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Limeng Xi,
  • Kai Yang,
  • Haoyuan Su,
  • Fansheng Meng

摘要

In this research, the filamentous algae algal–bacterial granular sludge (ABGS) was cultured and utilized to contrast the treatment performance of municipal wastewater with that of aerobic granular sludge (AGS). Larger grain size, as well as higher biomass content, was achieved with a substantial increase in algal content in the ABGS, without significant loss of settleability. The genus of Stigeoclonium (from phylum Chlorophyta) was found to flourish as the dominant algae in the ABGS systems. A notable enhancement in granular stability was observed. The integrity coefficient of ABGS was merely 0.25–0.27, in contrast to 0.58 for AGS. This reduction in the integrity coefficient of ABGS decreased the likelihood of particle disintegration. Due to algae growth, ABGS had a better nutrient removal efficiency of 76.5–77.9% for nitrogen and 80.3–82.3% for phosphorus. Meanwhile, a 2.1 times lipid content enrichment was also obtained in ABGS, apparently with the growth of Stigeoclonium and Navicula (from phylum Bacillariophyta). This study may provide meaningful information for the use of such filamentary ABGS techniques in practice.