Ahn Chang Hyuk, Lee Saeromi, Park Jae Roh, Ahn Hong-Kyu, Yoon Seongsim, Nam Kyoungphile, Joo Jin Chul
Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Republic of Korea.
Department of Civil and Environmental Engineering, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea.
Heliyon. 2022 Jun 10;8(6):e09700. doi: 10.1016/j.heliyon.2022.e09700. eCollection 2022 Jun.
The recovery and reuse strategy of cyanobacterial microalgal sludge (CyanoMS) is a novel sustainable platform that can mitigate cyanobacterial harmful algal blooms (CyanoHABs) in the freshwater system. This study aimed to assess the nutritional feasibility of harvested CyanoMS for microalgal soil ameliorants (MSAs) as efficient biofertilizers by the composting process. Most MSAs exhibited stable nutrient levels during the sequential metabolic phases for the entire period. The qualitative value of all MSAs using CyanoMS as a biofertilizer was verified by the excellent Fertility Index (FI), Clean Index (CI), and plant growth values. Also, successfully matured MSAs provided long-term support for retarded release of nutrients along the microbial transitional pathway. However, suitable CyanoMS contents of 11.7-37.6% (/) in MSAs were critical for efficient microbial activation and substrate inhibition. Since these results were fundamentally based on microbial transition on the CyanoMS content, optimum weight content and composting period were required. Nevertheless, MSAs were commercially applicable to high value-added crops due to their high fertilization potential and recyclable value.
蓝藻微藻污泥（CyanoMS）的回收和再利用策略是一个新型的可持续平台，可减轻淡水系统中的蓝藻有害藻华（CyanoHABs）。本研究旨在通过堆肥过程评估收获的CyanoMS作为高效生物肥料用于微藻土壤改良剂（MSA）的营养可行性。在整个连续代谢阶段，大多数MSA的营养水平保持稳定。使用CyanoMS作为生物肥料的所有MSA的定性价值通过优异的肥力指数（FI）、清洁指数（CI）和植物生长值得到验证。此外，成功成熟的MSA沿着微生物过渡途径为养分的缓释提供了长期支持。然而，MSA中11.7-37.6%（/）的合适CyanoMS含量对于有效的微生物活化和底物抑制至关重要。由于这些结果从根本上基于CyanoMS含量的微生物转变，因此需要最佳重量含量和堆肥期。尽管如此，由于其高施肥潜力和可回收价值，MSA在商业上适用于高附加值作物。
