Performance and microbial community analysis of Combined Denitrification and Biofloc Technology (CDBFT) system treating nitrogen-rich aquaculture wastewater

被引：31

作者：

Li, Changwei ^{[1
]}

Li, Jiawei ^{[1
]}

Liu, Gang ^{[1
]}

Deng, Yale ^{[2
]}

Zhu, Songming ^{[1
]}

Ye, Zhangying ^{[1
]}

Shao, Yufang ^{[1
]}

Liu, Dezhao ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Biosyst Engn & Food Sci, Inst Agr Bioenvironm Engn, Hangzhou 310058, Zhejiang, Peoples R China

[2] Wageningen Univ, Dept Anim Sci, Aquaculture & Fisheries Grp, NL-6708 WD Wageningen, Netherlands

来源：

BIORESOURCE TECHNOLOGY | 2019年 / 288卷

基金：

国家重点研发计划;

关键词：

Denitrification; Biofloc technology; Aquaculture wastewater; LED light; Microbial community; DIFFERENT CARBON-SOURCES; BACTERIAL COMMUNITY; OREOCHROMIS-NILOTICUS; NUTRIENT REMOVAL; FRESH-WATER; POLY(BUTYLENE SUCCINATE); DISEASE RESISTANCE; PHOSPHORUS REMOVAL; ACTIVATED-SLUDGE; IMMUNE-RESPONSE;

D O I：

10.1016/j.biortech.2019.121582

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study proposed two novel Combined Denitrification and Biofloc Technology (CDBFT) systems (one under blue LED light (L1) and the other without light (C1), each containing a denitrification (DE) reactor and a biofloc-based reactor) for the enhanced total nitrogen (TN) removal. Long-term operation (HO days) suggested that simultaneous nitrification and denitrification was achieved in both C1 and L1. Significantly higher total nitrogen removal efficiency (TNRE) was observed in L1-CDBFT (92.2%) than C1-CDBFT (87.5%, P < 0.05; after day 14). Further 24-hour nitrogen transformation test showed the boosted nitrate removal of L1-BFT than C1-BFT. High-throughput sequencing analysis revealed that phyla Rotifera and Nematoda which were indispensable for aquatic animal larviculture, were only found in L1-BFT. Nevertheless, CDBFT effluent from both systems was suitable for tilapia culture based on water quality, biofloc characteristics and tilapia survival rates. Overall, this study highlights the significance of developing CDBFT for TN removal especially under lights.

引用

页数：9

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