Response of wastewater treatment performance, microbial composition and functional genes to different C/N ratios and carrier types in MBBR inoculated with heterotrophic nitrification-aerobic denitrification bacteria
Response of wastewater treatment performance, microbial composition and functional genes to different C/N ratios and carrier types in MBBR inoculated with heterotrophic nitrification-aerobic denitrification bacteria
复制标题
接种异养硝化-好氧反硝化菌的MBBR废水处理性能、微生物组成和功能基因对不同C/N比和载体类型的响应
DOI：
10.1016/j.biortech.2021.125339
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发表时间：
2021
影响因子：
11.4
通讯作者：
Zhao Tiantao
中科院分区：
文献类型：
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作者：
Chen Xue;Zhang Qian;Zhu Yunan;Zhao Tiantao
为使接种HN-AD菌（B-MBBR）的移动床生物膜反应器（MBBR）在处理畜禽养殖废水（LPBW）中以最高效的方式运行，研究了不同C/N比下两种不同载体类型的MBBR的脱氮效率和微生物组成。结果表明，不同载体在不同C/N比下对NR的性能差异较大。由于聚乙烯醇（PVA）凝胶的多孔结构提供了细菌保护，以PVA凝胶为载体的MBBR表现出更稳定的NR性能（范围为78.05%~ 83.76%），而以Kaldnes（K1）为载体的MBBR表现出更稳定的NR性能（范围为78.05%~ 83.76%）。微生物分析表明，以PVA凝胶为载体的MBBR有利于贫营养菌和HN-AD菌（副球菌属和不动杆菌属）的生长，在C/N为6时相对丰度最高，为16.37%。
To operate the moving bed biofilm reactor inoculated with HN-AD bacteria (B-MBBR) instead of activated sludge for livestock and poultry breeding wastewater (LPBW) disposal in most efficient manner, nitrogen removal (NR) efficiency and microbial composition of two MBBRs with different carrier types under various C/N ratios were explored. Results indicated that the performance on NR greatly various in different carrier types under various C/N ratios. Attributing to the bacterial protection provided by the porous structure of polyvinyl alcohol (PVA) gel, MBBR using PVA gel as the carrier exhibited a more stable NR performance (range from 78.05% to 83.76%) versus that using Kaldnes (K1) as the carrier (range from 78.05% to 83.76%). Besides, microbial analysis indicated that MBBR with PVA gel as the carrier is conducive to the growth of oligotrophic and HN-AD bacteria (ParacoccusandAcinetobacter), and the highest relative abundance was 16.37% at C/N ratio of 6.