fulltext.study @t Gmail

Composite chemical wastewater treatment by biofilm configured periodic discontinuous batch process operated in anaerobic metabolic function ☆

Paper ID Volume ID Publish Year Pages File Format Full-Text
18191 42713 2007 9 PDF Available
Title
Composite chemical wastewater treatment by biofilm configured periodic discontinuous batch process operated in anaerobic metabolic function ☆
Abstract

Biofilm configured system with sequencing/periodic discontinuous batch mode operation was studied in anaerobic metabolic function for the treatment of composite chemical wastewater (low-biodegradable [low BOD/COD ratio ∼0.31] and sulfate content, 1.75 g/l). Inert stone chips were used as biofilm supporting material. Reactor was operated with a total cycle period of 24 h (FILL: 15 min; REACT (aeration with recirculation): 23 h; SETTLE: 30 min; DECANT: 15 min) and the performance of the system was studied at various organic loading rates (OLR) of 1.15 kg COD/cum-day, 2.3 kg COD/cum-day, and 4.76 kg COD/cum-day. Substrate utilization showed a steady increase with increase in OLR and reactor showed sustained performance at higher loading rates also. The reactor yielded effective sulfate reduction with concomitant increase with organic loading rate. Rapid startup and stabilization tendency was evidenced during the operation. Periodically operated biofilm configured reactor showed comparatively effective performance over the corresponding continuously operated biofilm system studied with same wastewater with respect to rapidity in startup and stabilization, higher substrate removal efficiency, effective sulfate reduction, robust performance at higher loading rates and low operating retention time (24 h). Biofilm configured system coupled with periodic discontinuous batch mode operation imposes regular variations in the substrate concentration on biofilm organisms as a result, organisms throughout the film achieve maximum growth rates resulting in improved reaction potential leading to stable and robust system which is well suited for treating highly variable wastes. Periodic discontinuous batch mode operation of the biofilm reactors results in a more even distribution of the biomass throughout the reactor and was able to treat large shock loads than the continuous flow process.

Keywords
Composite chemical wastewater; Periodic discontinuous batch mode operation; Anaerobic sequencing batch biofilm reactor (AnSBBR); Low-biodegradable; Organic loading rate; Substrate degradation rate; Biofilm; Sulfate
First Page Preview
Composite chemical wastewater treatment by biofilm configured periodic discontinuous batch process operated in anaerobic metabolic function ☆
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: Enzyme and Microbial Technology - Volume 40, Issue 5, 3 April 2007, Pages 1398–1406
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