If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Enhancement of Batch Waste Activated Sludge Digestion by Microwave Pretreatment

$30.00 plus tax (Refund Policy)

Buy Article:

Abstract:

Batch anaerobic digesters were used to stabilize microwave (MW)-irradiated waste activated sludge (WAS). A low temperature range (50–96 °C) MW irradiation was applied. Effects of pretreatment temperature (T) and intensity (I), concentration (C) and percentage of sludge pretreated (PT) were investigated in a multilevel factorial statistical design containing 54 mesophilic batch reactors by monitoring cumulative biogas production (CBP). Variance analysis (ANOVA) determined that the most important factors affecting WAS solubilization were temperature, intensity, and sludge concentration. Improvements in CBP from WAS were significantly affected by sludge percentage pretreated, temperature, and concentration. Pretreatment resulted in 3.6 ± 0.6 and 3.2 ± 0.1 fold increases in soluble to total chemical oxygen demand (SCOD/TCOD) at high and low sludge concentrations, respectively. WAS, microwaved to 96 °C, produced the greatest improvement in CBP with 15 ± 0.5 and 20 ± 0.3% increases over controls after 19 d of digestion at low and high WAS concentrations. Dewaterability of microwaved sludge was enhanced after anaerobic digestion.

Keywords: BMP; anaerobic batch sludge digestion; microwave; pretreatment; solubilization

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143007X184069

Publication date: October 1, 2007

More about this publication?
  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • WEF Bookstore
  • ingentaconnect is not responsible for the content or availability of external websites

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more