[Comparison of Polycaprolactone and Poly-3-hydroxybutyrate-co-3-hydroxyvalerate for Nitrogen Removal].
[Comparison of Polycaprolactone and Poly-3-hydroxybutyrate-co-3-hydroxyvalerate for Nitrogen Removal].
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DOI：
10.13227/j.hjkx.201902012
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
C. Yi;W. Qin;Zhan Chen;X. Wen
中科院分区：
文献类型：
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作者：
C. Yi;W. Qin;Zhan Chen;X. Wen
聚己内酯（PCL）和聚3-羟基丁酸酯-co-3-羟基戊酸酯（PHBV）两种可生物降解聚合物被用作反硝化缓释碳源和微生物载体。通过综合比较它们在反硝化、碳释放、表面形态、材料组成以及微生物群落特征方面的性能，PHBV被确定为性能较好的材料。与PCL相比，其反硝化启动时间更短，反硝化率更高，残留有机物浓度更低，反硝化性能更稳定持续。这是因为其表面粗糙，含有大量C-O、C=O等亲水基团，很容易被微生物附着和降解。因此，其表面的微生物多种多样。已鉴定出具有异养反硝化潜力的优势菌，如硫丝菌、假单胞菌、动胶菌、黄杆菌和脱氯单胞菌。因此，PHBV适合作为三次脱氮的碳源介质。
Two types of biodegradable polymers, polycaprolactone (PCL) and poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV), were used as a denitrification slow-release carbon source and a microbial carrier. By comprehensively comparing their performances in denitrification, carbon release, surface morphology, and material composition as well as their microbial community characteristics, the PHBV was determined as the better performer. It had a shorter denitrification start time, a higher denitrification rate, a lower residual organic matter concentration, and a more stable and sustained denitrification performance than PCL. This is because its surface was rough and contained large amounts of hydrophilic groups such as C-O and C=O, which is easily attached and degraded by microorganisms. As a result, the microorganisms on its surface were diverse. The dominant ones were identified with heterotrophic denitrification potentials, such as Thiothrix, Pseudomonas, Zoogloea, Flavobacterium, and Dechloromonas. Therefore, PHBV is suitable as a carbon source medium for tertiary nitrogen removal.