Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.
Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, China.
J Appl Microbiol. 2022 Mar;132(3):2450-2463. doi: 10.1111/jam.15238. Epub 2021 Oct 29.
To evaluate the effects of periodic application of effective microorganism (EM) bacteria and calcium peroxide on water environment restoration of a trench wetland ecosystem and its impact on microbiota in water and sediment.
The EM bacteria and calcium peroxide were alternately sprayed into the trench water, and changes in the physicochemical indices of water and sediment, and in microbiota structure were subsequently investigated. Alternately spraying of calcium peroxide and EM bacteria improved the water quality, especially in terms of the dissolved oxygen and transparency of water body, and could further reduce the levels of total nitrogen, total phosphorus and ammonia nitrogen. At the same time, the microbiota structure of the water body was significantly changed by spraying with calcium peroxide and EM bacteria, and the relative abundances of Pseudanabaena, Legionellaceae, Planktothrix, Planctomyces, Phenylobacterium, Rhodobacter, Rhodoferax and Aquirestis were significantly increased. However, there was no significant effect on the physicochemical indexes and microbiota composition of the sediment.
The water quality of the Baiyangdian trench could be significantly restored by regular sprinkling of calcium peroxide and EM bacteria.
The results provide an effective technical method for the restoration of trench wetland water.
评估有效微生物（EM）细菌和过氧化钙周期性应用对沟渠湿地生态系统水环境恢复的影响及其对水和沉积物中微生物群落的影响。
将 EM 细菌和过氧化钙交替喷入沟渠水中，随后研究水和沉积物理化指标以及微生物群落结构的变化。交替喷洒过氧化钙和 EM 细菌可改善水质，特别是水体溶解氧和透明度，并可进一步降低总氮、总磷和氨氮水平。同时，喷洒过氧化钙和 EM 细菌可显著改变水体微生物群落结构，假单胞菌属、军团菌科、束丝藻属、浮霉菌属、苯基杆菌属、红杆菌属、红环菌属和 Aquirestis 的相对丰度显著增加。然而，对沉积物的理化指标和微生物群落组成没有显著影响。
定期喷洒过氧化钙和 EM 细菌可显著恢复白洋淀沟渠的水质。
本研究结果为沟渠湿地水的修复提供了一种有效的技术方法。
