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Integrated ozone and biotreatment of pulp mill effluent and changes in biodegradability and molecular weight distribution of organic compounds.
Water Res. 2005 Oct; 39(16):3763-72.WR

Abstract

The overall effectiveness of integrating ozonation with biological treatment on the biodegradability enhancement and recalcitrant organic matter (ROM) removal from pulp mill alkaline bleach plant effluent was investigated. Ozonation was performed in a semi-batch bubble column reactor at pH of 11 and 4.5. Batch biological treatment was conducted in shake flasks. Samples obtained during the treatments were monitored for BOD5, COD, TOC, and molecular weight distribution. At an ozone dosage of 0.7-0.8 mg O3/mL wastewater, integrated treatment showed about 30% higher TOC mineralization compared to individual ozonation or biotreatment. Ozone treatment enhanced the biodegradability of the effluent (monitored as 21% COD reduction and 13% BOD5 enhancement), allowing for a higher removal of pollutants. The conversion of high molecular weight (HMW) to low molecular weight (LMW) compounds was an important factor in the overall biodegradability enhancement of the alkaline effluent. The overall biodegradability of the LMW compounds did not change over the course of ozonation, but it increased from 5% to 50% (measured as COD removal) for the HMW portion. Ozonation at pH of 11 was more effective than that at pH of 4.5 in terms of generating more biodegradable compounds.

Authors+Show Affiliations

Bijan L
Department of Chemical and Biological Engineering, The University of British Columbia, 2216 Main Mall, Vancouver, BC, Canada V6T 1Z4.
Mohseni M
No affiliation info available

MeSH

Biodegradation, EnvironmentalBioreactorsHydrogen-Ion ConcentrationIndustrial WasteMolecular WeightOrganic ChemicalsOxidants, PhotochemicalOzoneWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16139863

Citation

Bijan, Leila, and Madjid Mohseni. "Integrated Ozone and Biotreatment of Pulp Mill Effluent and Changes in Biodegradability and Molecular Weight Distribution of Organic Compounds." Water Research, vol. 39, no. 16, 2005, pp. 3763-72.
Bijan L, Mohseni M. Integrated ozone and biotreatment of pulp mill effluent and changes in biodegradability and molecular weight distribution of organic compounds. Water Res. 2005;39(16):3763-72.
Bijan, L., & Mohseni, M. (2005). Integrated ozone and biotreatment of pulp mill effluent and changes in biodegradability and molecular weight distribution of organic compounds. Water Research, 39(16), 3763-72.
Bijan L, Mohseni M. Integrated Ozone and Biotreatment of Pulp Mill Effluent and Changes in Biodegradability and Molecular Weight Distribution of Organic Compounds. Water Res. 2005;39(16):3763-72. PubMed PMID: 16139863.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Integrated ozone and biotreatment of pulp mill effluent and changes in biodegradability and molecular weight distribution of organic compounds. AU - Bijan,Leila, AU - Mohseni,Madjid, PY - 2004/09/07/received PY - 2005/06/09/revised PY - 2005/07/03/accepted PY - 2005/9/6/pubmed PY - 2005/12/24/medline PY - 2005/9/6/entrez SP - 3763 EP - 72 JF - Water research JO - Water Res VL - 39 IS - 16 N2 - The overall effectiveness of integrating ozonation with biological treatment on the biodegradability enhancement and recalcitrant organic matter (ROM) removal from pulp mill alkaline bleach plant effluent was investigated. Ozonation was performed in a semi-batch bubble column reactor at pH of 11 and 4.5. Batch biological treatment was conducted in shake flasks. Samples obtained during the treatments were monitored for BOD5, COD, TOC, and molecular weight distribution. At an ozone dosage of 0.7-0.8 mg O3/mL wastewater, integrated treatment showed about 30% higher TOC mineralization compared to individual ozonation or biotreatment. Ozone treatment enhanced the biodegradability of the effluent (monitored as 21% COD reduction and 13% BOD5 enhancement), allowing for a higher removal of pollutants. The conversion of high molecular weight (HMW) to low molecular weight (LMW) compounds was an important factor in the overall biodegradability enhancement of the alkaline effluent. The overall biodegradability of the LMW compounds did not change over the course of ozonation, but it increased from 5% to 50% (measured as COD removal) for the HMW portion. Ozonation at pH of 11 was more effective than that at pH of 4.5 in terms of generating more biodegradable compounds. SN - 0043-1354 UR - https://www.unboundmedicine.com/medline/citation/16139863/Integrated_ozone_and_biotreatment_of_pulp_mill_effluent_and_changes_in_biodegradability_and_molecular_weight_distribution_of_organic_compounds_ DB - PRIME DP - Unbound Medicine ER -