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Inoculum and pH effects on ammonium removal and microbial community dynamics in aquaponics systems
iScience ( IF 4.6 ) Pub Date : 2024-02-01 , DOI: 10.1016/j.isci.2024.109073 Peyman Derikvand 1 , Brittany Sauter 1 , Andrew Keddie 1 , Lisa Y Stein 1
iScience ( IF 4.6 ) Pub Date : 2024-02-01 , DOI: 10.1016/j.isci.2024.109073 Peyman Derikvand 1 , Brittany Sauter 1 , Andrew Keddie 1 , Lisa Y Stein 1
Affiliation
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Understanding the ecology of microorganisms is essential for optimizing aquaponics systems. Effects of pH and inoculum on ammonium removal and dynamics of microbial community composition from all compartments of lab-scale aquaponics systems were examined. Initial ammonium accumulation in systems with comammox-enriched inocula were 47% and 69% that of systems enriched with ammonia-oxidizing bacteria (AOB), with higher rates of ammonium removal and transient nitrite accumulation measured in the latter systems. By the end of operation, and AOB were dominant nitrifiers in systems at pH 7.6–7.8, whereas comammox () nitrifiers and plant growth-promoting microbes were abundant in systems operating at pH 5.8–6.0. Lower pH systems supported more robust plant growth with no significant effects on fish health. This study demonstrated functional redundancy of aquaponics microbiota, with selectivity of nitrifying taxa as a function of pH. The results suggest that inoculum and pH are important considerations for aquaponics system initiation and optimization.
中文翻译：
鱼菜共生系统中接种量和 pH 对铵去除和微生物群落动态的影响
了解微生物的生态对于优化鱼菜共生系统至关重要。研究了 pH 值和接种量对实验室规模鱼菜共生系统所有隔间的铵去除和微生物群落组成动态的影响。富含苓氨氧化菌的系统中的初始铵积累量分别是富含氨氧化细菌（AOB）的系统的47%和69%，在后者的系统中测得的铵去除率和瞬时亚硝酸盐积累率更高。运行结束时，pH 7.6-7.8 的系统中，AOB 和 AOB 是主要硝化菌，而 pH 5.8-6.0 的系统中，comammox () 硝化菌和植物生长促进微生物丰富。较低的 pH 系统支持更强劲的植物生长，对鱼类健康没有显着影响。这项研究证明了鱼菜共生微生物群的功能冗余，硝化类群的选择性随 pH 值的变化而变化。结果表明，接种量和 pH 值是鱼菜共生系统启动和优化的重要考虑因素。
更新日期：2024-02-01
中文翻译：
鱼菜共生系统中接种量和 pH 对铵去除和微生物群落动态的影响
了解微生物的生态对于优化鱼菜共生系统至关重要。研究了 pH 值和接种量对实验室规模鱼菜共生系统所有隔间的铵去除和微生物群落组成动态的影响。富含苓氨氧化菌的系统中的初始铵积累量分别是富含氨氧化细菌（AOB）的系统的47%和69%，在后者的系统中测得的铵去除率和瞬时亚硝酸盐积累率更高。运行结束时，pH 7.6-7.8 的系统中，AOB 和 AOB 是主要硝化菌，而 pH 5.8-6.0 的系统中，comammox () 硝化菌和植物生长促进微生物丰富。较低的 pH 系统支持更强劲的植物生长，对鱼类健康没有显着影响。这项研究证明了鱼菜共生微生物群的功能冗余，硝化类群的选择性随 pH 值的变化而变化。结果表明，接种量和 pH 值是鱼菜共生系统启动和优化的重要考虑因素。
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