Abstract Black odorous water contains abundant organics and nutrients, such as nitrogen and phosphorus, which would lead to eutrophication of the water body and affect the water environment. In this study, the eutrophic water body in the campus landscape was taken as the research object, and the biological contact oxidation (BCO) method and co-cultivated indigenous microorganisms were adopted to pretreat black odorous water. Inoculating mutant strain M1 through ultraviolet-B radiation formed algae-bacteria symbiosis system in optimal effluent. The results showed that under the conditions of dissolved oxygen (DO) concentration of 5 mg/L, light intensity of 3000 Lx and inoculum size of 125,000 cells/mL, the optimal organic migration effect was achieved by the combined process. In addition, the ability of H. pluvialis to transform from green vegetative cells to red cyst cells under stressful conditions (strong light, nitrogen starvation, etc.) made it as an indicator for monitoring the degradation status of pollutants in black odorous water.

中文翻译：

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雨生红球藻的紫外-B 辐射增强藻类和细菌共生系统中黑臭水的生物接触氧化预处理

摘要 黑臭水体中含有丰富的有机物和氮、磷等营养物质，会导致水体富营养化，影响水环境。本研究以校园景观中的富营养化水体为研究对象，采用生物接触氧化（BCO）法与共培养本土微生物对黑臭水体进行预处理。通过紫外线-B辐射接种突变菌株M1在最佳出水中形成藻类-细菌共生系统。结果表明，在溶解氧(DO)浓度为5 mg/L、光照强度为3000 Lx、接种量为125,000个/mL的条件下，组合工艺实现了最佳的有机迁移效果。此外，H.