fulltext.study @t Gmail

Study on dyeing wastewater treatment at high temperature by MBBR and the thermotolerant mechanism based on its microbial analysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
34294 45016 2015 8 PDF Available
Title
Study on dyeing wastewater treatment at high temperature by MBBR and the thermotolerant mechanism based on its microbial analysis
Abstract

•Higher performance was achieved at increasing temperature for dyeing wastewater.•COD removal exhibited two peaks at 40 °C and 50 °C, max NH3-N removal was at 35 °C.•Caldilinea (35–45 °C), Rubellimicrobium, Pseudoxanthomonas (≥50 °C) was dominant.•Process of thermotolerant mechanism establishment of the sludge is proposed.•“Two-stage enrichment” of different thermophilic communities was the key procedure.

The dyeing wastewater treatment under increasing high temperature condition was studied in MBBRs. Results showed that as the temperature increase, the COD removal exhibited two best performances at 40 °C and 50 °C, and the maximum NH3-N removal was obtained at 35 °C and 40 °C. The optimum temperature for extracellular polymeric substances (EPS) yield is 45 °C and the humic acid was the major contributor. Microbial community was analyzed by the association of DGGE, real-time PCR and high-throughput sequencing technologies. The highest abundance of AOB (characterized by amoA genes) was obtained at 35 °C, and it confirmed that the biofilm (attached on fillers) can facilitate the AOB abundance maintaining in the sludge. The “precursor and successor” thermophilic communities were enriched and dominant at different temperature stages, which mainly conclude genera Caldilinea (from 35 °C to 45 °C) and genera Rubellimicrobium and Pseudoxanthomonas (over 50 °C), respectively. It meant the thermophilic community displayed great evolution at the critical temperature “45 °C|50 °C”. Additionally, the process of thermotolerant mechanism establishment of the sludge in the MBBRs is proposed and the “two-stage enrichment” of different thermophilic communities was considered as the key procedure.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
MBBR, moving bed biofilm reactor; COD, chemical oxygen demand; EPS, extracellular polymeric substances; DGGE, denaturing gradient gel electrophoresis; PCR, polymerase chain reaction; AOB, ammonia oxidizing bacteriaDyeing wastewater; MBBR; Microbial commun
First Page Preview
Study on dyeing wastewater treatment at high temperature by MBBR and the thermotolerant mechanism based on its microbial analysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 50, Issue 11, November 2015, Pages 1934–1941
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us