JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Home
    Editor in Chief
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Guidelines for Authors
    Terms and Conditions
    Fees and Payments
    Track Paper Status
 
Announcements
    JEB Awards
 

Google Search the Journal web-site:


    Abstract - Issue Sep 2016, 37 (5)                                     Back


nstantaneous and historical temperature effects on a-pinene

Effect of COD/SO42- ratio and alkalinity on COD removal and sulfate reduction in two-phase expanded granular sludge bed

 

Jun Li1*, Tao Xiang1, Jie Wei1, Dongning Chen2 and Muhammad Aqeel Ashraf3

1School of Municipal and Environmental Engineering, Shenyang JianZhu University, Shenyang 110168, Peoples Republic of China.

2Shenyang Urban Planning Design and Research Institute, Shenyang 110168, Peoples Republic of China.

3Faculty of Science and Natural Resources, University Malaysia Sabah 88400 Kota Kinabalu, Sabah, Malaysia

*Corresponding Author E-mail: junlee@sjzu.edu.cn

 

 Publication Data

Paper received:

21 February 2016

 

Revised received:

27 April 2016

 

Re-revised received:

5 May 2016

 

Accepted:

23 June 2016

 

Abstract

In the present study, a bench-scale two-phase expanded granular sludge bed (EGSB) reactor was applied for treatment of high-sulfate wastewater. The reactor was operated continuously at 35?C. The EGSB1, as sulfate-reducing phase, and EGSB2, as methane-producing phase, were combined after successful start-up. The treatment characteristics, including the effect of influent COD/ SO42- ratio and alkalinity in reactor have been discussed for EGSB1 and EGSB2 respectively. When total COD removal was 85%, the influent COD/SO42- ratio was 2.8.? When the ratio was less than 2.8, the COD removal descended quickly. The total sulfate removal then raised to 90% and the ratio exceeded 4.4. When influent alkalinity was kept at 8-10 mmol l-1, the total COD and SO42- removal reached 93.3% and 94.0% respectively. The results presented in the study provide some useful information for optimization of COD removal and SO42- reduction process in wastewater treatment.   

 

 

 Key words

Alkalinity, COD/SO42-, Granule sludge, High-sulfate wastewater, Two-phase anaerobic digestion process

 

 

Copyright ? 2016 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).