|Table of Contents|

Denitrification efficiency of the special moving-bed biofilm reactor (SMBBR) process for domestic sewage treatment and its microbial diversity(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 01
Page:
206-214
Research Field:
Articles
Publishing date:

Info

Title:
Denitrification efficiency of the special moving-bed biofilm reactor (SMBBR) process for domestic sewage treatment and its microbial diversity
Author(s):
JING Shuangyi1 LI Yan1 YU Linghong1** YANG Wenhuan1 ZHU Haojun1 2 & LI Weiping1
1 School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China 2 Sino-Danske Cloning (Beijing) Biological Technology Co., Ltd, Beijing 100085, China
Keywords:
Special Moving-Bed Biofilm Reactor high-sequencing microbial community diversity environmental factor
CLC:
X172
PACS:
DOI:
10.19675/j.cnki.1006-687x.2018.04039
DocumentCode:

Abstract:
Microorganisms exist at the core of the biofilm treatment technology; therefore, the study of microbial diversity is of great significance to understand the mechanism of removing pollutants by using the biofilm treatment method. In this study, a special moving-bed biofilm reactor (SMBBR) was used to treat urban domestic sewage, and the Illumina HiSeq high-throughput sequencing technology was used to study the microorganism distribution and correlation between microflora and environmental factors in each reactor. The results showed under the conditions that water temperature was 20–30 ℃, the reflux ratio of liquid supernatant was 150%, dissolved oxygen (DO) was 4 mg/L, the hydraulic retention time (HRT) was 18 h, the removal rates of ammonia and nitrogen by SMBBR were as high as 96.7%; the structures of biofilm microbial populations in aerobic and anaerobic reactors of SMBBR were different, but the dominant microbial populations were Proteobacteria and Firmicutes. At the genus level, the aerobic anti-nitrifying bacteria Rhodobacter, Thauera, and ammonia-oxidizing bacteria Nitrosomonadales were detected. In addition, DO was the most significant environmental factor affecting the structure of microflora. The results showed that environmental factors affected microbial community substitution; aerobic denitrification and ammoxidation were likely important denitrification mechanisms in SMBBR.

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Last Update: 2019-02-25