Soil & Fertiliser and Resources and Environment Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200,China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430072, China.
Soil & Fertiliser and Resources and Environment Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200,China.
Sci Total Environ. 2024 Dec 10;955:177049. doi: 10.1016/j.scitotenv.2024.177049. Epub 2024 Oct 22.
Desertification and wastewater discharge are two global issues that severely threaten the sustainable use of available natural resources. This study aimed to explore the potential for transferring nutrients from municipal wastewater to drylands by inducing artificial biocrusts through the inoculation of wastewater-cultured Scytonema javanicum onto the sand surface in Gurbantunggut Desert. The results demonstrated that wastewater cultured S. javanicum effectively induced artificial biocrusts, achieving high photosynthetic biomass and nutrient accumulation (Chl-a, AP and OC) comparable to those induced by S. javanicum cultured in synthetic medium. In addition, the risk index (RI) value of 124.32 suggested a low ecological risk using wastewater cultured S. javanicum to induce artificial biocrusts. This study substantiates the feasibility of using municipal wastewater-cultured cyanobacteria to induce artificial biocrusts, thereby providing a dual benefit: enhancing soil stability in drylands and utilizing wastewater as a resource, thus presenting a significant stride towards the sustainable management of natural resources.
沙漠化和废水排放是两个严重威胁可利用自然资源可持续利用的全球性问题。本研究旨在通过在古尔班通古特沙漠的沙表面接种从废水中培养的束丝藻来探索将营养物质从城市废水中转移到旱地的潜力。结果表明，废水培养的束丝藻有效地诱导了人工生物结皮，实现了高光合生物量和养分积累（Chl-a、AP 和 OC），与在合成培养基中培养的束丝藻诱导的生物量和养分积累相当。此外，使用废水培养的束丝藻诱导人工生物结皮的风险指数（RI）值为 124.32，表明生态风险较低。本研究证实了利用城市废水培养的蓝藻诱导人工生物结皮的可行性，从而实现了双重效益：增强了旱地土壤的稳定性，并利用了废水作为资源，因此朝着可持续管理自然资源迈出了重要一步。
