University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Physiological activities associated with biofilm growth in attached and suspended growth bioreactors under aerobic and anaerobic conditions.

Naz, I, Seher, S, Perveen, I, Saroj, DP and Ahmed, S (2015) Physiological activities associated with biofilm growth in attached and suspended growth bioreactors under aerobic and anaerobic conditions. Environ Technol. pp. 1-15.

[img] PDF (licence)
SRI_deposit_agreement.pdf
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (33kB)
[img] Text
Paper-3-Iffat.pdf - ["content_typename_UNSPECIFIED" not defined]
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (612kB)

Abstract

This research work evaluated the biofilm succession on stone media and compared the biochemical changes of sludge in attached and suspended biological reactors operated under aerobic and anaerobic conditions. Stones incubated (30 ± 2°C) with activated sludge showed a constant increase in biofilm weight up to the fifth and seventh week time under anaerobic and aerobic conditions, respectively, where after reduction (>80%) the most probable number index of pathogen indicators on ninth week was recorded. Reduction in parameters such as biological oxygen demand (BOD) (47.7%), chemical oxygen demand (COD, 41%), nitrites (60.2%), nitrates (105.5%) and phosphates (58.9%) and increase in dissolved oxygen (176.5%) of sludge were higher in aerobic attached growth reactors as compared with other settings. While, considerable reductions in these values were also observed (BOD, 53.8%; COD, 2.8%; nitrites, 28.6%; nitrates, 31.7%; phosphates, 41.4%) in the suspended growth system under anaerobic conditions. However, higher sulphate removal was observed in suspended (40.9% and 54.9%) as compared with biofilm reactors (28.2% and 29.3%). Six weeks biofilm on the stone media showed maximum physiological activities; thus, the operational conditions should be controlled to keep the biofilm structure similar to six-week-old biofilm, and can be used in fixed biofilm reactors for wastewater treatment.

Item Type: Article
Authors :
AuthorsEmailORCID
Naz, IUNSPECIFIEDUNSPECIFIED
Seher, SUNSPECIFIEDUNSPECIFIED
Perveen, IUNSPECIFIEDUNSPECIFIED
Saroj, DPUNSPECIFIEDUNSPECIFIED
Ahmed, SUNSPECIFIEDUNSPECIFIED
Date : 30 January 2015
Identification Number : https://doi.org/10.1080/09593330.2014.1003614
Uncontrolled Keywords : attached growth process, biofilm growth, stone media, suspended growth process, wastewater treatment
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 10:53
Last Modified : 28 Mar 2017 10:53
URI: http://epubs.surrey.ac.uk/id/eprint/807161

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800