Growth Characteristics of Photosynthetic Bacteria Cultured in Anaerobic Digestate of Sewage Sludge to be Used as Fertilizer
Growth Characteristics of Photosynthetic Bacteria Cultured in Anaerobic Digestate of Sewage Sludge to be Used as Fertilizer
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污泥厌氧消化液肥料培养光合细菌的生长特性
DOI：
10.1007/s12649-021-01598-5
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发表时间：
2022
影响因子：
3.2
通讯作者：
Nishimura Fumitake
中科院分区：
文献类型：
--
作者：
Hidaka Taira;Suzuki Satoshi;Nishimura Fumitake
目的在污水处理厂对各种类型的有机废物进行厌氧共消化后，可直接用作肥料，特别是在小型设施中。利用该菌培养光合细菌（PSB），有望提高肥料的品质。因此，在这项研究中，我们评估的生长特性的光合细菌在污水samples. Methodsexperimentary规模的光合细菌培养实验进行使用培养基或污水样品。类胡萝卜素，pufMcopy数，和微生物的结构进行了analysed. ResultsRhodocellaceae增长的消化污泥样品的滤液中，而它没有增长的未过滤的消化污泥样品。每天添加400 mg/L的乙酸盐促进光合细菌的生长。类胡萝卜素，pufMcopy数，和微生物结构的比较表明，类胡萝卜素的测量可以进行监测光合细菌的生长。当悬浮固体浓度< 1 g/L时，消化污泥样品中PSB的比生长速率约为0.3 d-1，但当悬浮固体浓度为10 g/L时，PSB的比生长速率降低至0.2 d-1。该技术可以提高肥料利用率，有助于小规模废物和废水处理系统的能源和资源的区域再循环。
PurposeFollowing anaerobic co-digestion of various types of organic waste in wastewater treatment plants, the digestate can be directly used as fertilizer, particularly at small facilities. Cultivation of photosynthetic bacteria (PSB) using this digestate is promising for improving fertilizer quality. Therefore, in this study, we evaluated the growth characteristics of PSB in sewage samples.MethodsLaboratory-scale PSB cultivation experiments were performed using culture medium or sewage samples. Carotenoids,pufMcopy numbers, and microbial structures were analyzed.ResultsRhodospirillaceaegrew in the filtrate of digested sludge samples, whereas it did not grow in the unfiltered digested sludge samples. Addition of acetate at 400 mg/L per day promoted the growth of PSB. Comparison of the carotenoids,pufMcopy numbers, and microbial structures in the culture liquids showed that carotenoid measurements can be performed to monitor PSB growth. The specific growth rate of PSB in the digested sludge samples was approximately 0.3 day−1when the suspended solid concentration was < 1 g/L but decreased to 0.2 day−1when this concentration was 10 g/L.ConclusionPSB can be cultivated in sewage samples containing other types of bacteria, particularly at low suspended solid concentrations. This technology can enhance fertilizer utilization, contributing to regional recirculation of energy and resources from small-scale waste and wastewater treatment systems.Graphic Abstract
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