LIYu-zhi,LIAi-min,HAOJia-hou,et al.Current Status and Challenges of Cyanobacteria in Preparing Biomass Carbon Sources[J].China Water & Wastewater,2025,41(12):18-25.
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Current Status and Challenges of Cyanobacteria in Preparing Biomass Carbon Sources

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第12期 Page: 18-25 Column: Date of publication: 2025-06-17
Author(s):
LI　Yu-zhi1;  LI　Ai-min1;  HAO　Jia-hou1;  TAN　Jia-yi1;  WANG　Yan1;  WANG　Bing-zheng1;  WANG　Shuo1; 2; 3;  LI　Ji1; 2; 3
（1. School of Environment & Ecology， Jiangnan University， Wuxi 214122， China； 2. Jiangsu Key Laboratory of Anaerobic Biotechnology， Jiangnan University， Wuxi 214122， China； 3. Jiangsu Collaborative Innovation Center of Water Treatment Technology ＆ Material， Suzhou 215009， China）
Keywords:
biomass carbon sources;  cyanobacteria;  nitrogen and phosphorus removal;  cell wall cracking;  microcystic toxins
Abstract:
The removal of nitrogen and phosphorus pollutants in wastewater treatment plants (WWTPs) often requires the addition of external carbon sources, while the existing external carbon sources are derived from the biorefinery process of petroleum substances, resulting in high costs. In order to meet the strategic demand for carbon emission reduction and carbon neutralization, it is urgent to develop new carbon sources to replace the existing carbon sources. As an agricultural residue, cyanobacteria are rich in organic matter and have great potential for preparing carbon sources. In this paper, two methods for preparing biomass carbon source using cyanobacteria are briefly introduced: anaerobic digestion and physical-chemical methods. The difficulties in preparing biomass carbon sources using cyanobacteria are clarified, including the water removal for thickening, and the removal of nitrogen, phosphorus, and microcystins in cyanobacteria. Possible solutions to these difficulties are further summarized. Finally, combined with the existing research of cyanobacteria biomass carbon sources, the paper provides an outlook on current strategies to address the issue of potential inhibition of denitrifying bacteria by microcystins. These measures include： ①employing an acid hydrolysis process to remove microcystins during preparation stage of cyanobacterial biomass carbon sources; ②gradually domesticating denitrifying bacteria tolerant to microcystins during the dosing phase of cyanobacterial biomass carbon sources to achieve efficient total nitrogen removal.
Last Update: 2025-06-17