JEB logo

Journal of Environmental Biology

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

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
Read Journal
    Current Issue
    Journal Archives
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status

Search the Journal web-site through Google:

        Abstract - Issue July 2009, 30 (4)                                                                                                             Back


Biological heat potential and temperature effect of an autothermal

thermophilic aerobic treatment (ATAT) system


Jui Min Hung1, Chang Yu Chen2, Fu Shih Huang1 and Chih Jen Lu1

Department of Environmental Engineering, National Chung Shing University, No. 250, Kuo-Kuang Road

Taichung City 402, Taiwan, Republic of China

2Department of Environmental Engineering, Hung Kuang University, No. 34, Chung-Chie Road, Sha-Lu Town,

Taichung County 433, Taiwan, Republic of China

(Received: August 13, 2007; Revised received: March 28, 2008; Accepted: April 10, 2008)


Abstract: This study focused on the evaluation of the specific biological heat potential (hb) of a food-processing artificial wastewater in the autothermal thermophilic aerobic treatment (ATAT) system. A novel experimental method was developed to evaluate the hb value by using the heat balance model under the steady state. This system was daily fed with oily and artificial wastewater at 21460 mg l-1 COD. The sludge retention time (SRT) was controlled at 15 days.The results showed that the average values of hb were 3.25 to 3.63 kcal g-1-COD-removed for the artificial wastewater. The values of true growth yield (Y0) were 0.08 to 0.19 mg-MLSS mg-1-COD for the food-processing wastewater at different temperatures. The COD removal efficiency was 77to 91%, and it was decreased as temperature increased. But, the oil and grease (O and G) removal efficiency was 50to 69%, and increased as temperature increased. These results might indicate that oil and grease become more soluble and accessible to microorganisms at high temperatures. The study indicated the temperature effect constant () of vanít Hoff-Arrhenius law was 0.958, which explained and showed typical characteristics in the low sludge yield of an ATAT process.

Key words: ATAT system; Temperature effect; Biological heat potential, Growth yield, Oily wastewater

††††††† PDF of full length paper is available online




Copyright © 2009 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).