A new treatment process for photo-processing waste using a sulfur-oxidizing bacteria granular activated carbon system followed by Fenton oxidation

Citation
Bl. Lin et al., A new treatment process for photo-processing waste using a sulfur-oxidizing bacteria granular activated carbon system followed by Fenton oxidation, WATER SCI T, 38(4-5), 1998, pp. 163-170
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
WATER SCIENCE AND TECHNOLOGY
ISSN journal
0273-1223 → ACNP
Volume
38
Issue
4-5
Year of publication
1998
Pages
163 - 170
Database
ISI
SICI code
0273-1223(1998)38:4-5<163:ANTPFP>2.0.ZU;2-K
Abstract
Establishing a treatment process for practical, economic disposal of photo- processing waste (PW) has become an urgent environmental concern under rece ntly enacted provisions of the London Treaty. This paper describes a new, e ffective biological/chemical treatment process in which sulfur-oxidizing ba cteria (SOB) is used in conjunction with granular activated carbon (GAC), i .e., an aerobic SOB/GAC system, to treat PW prior to Fenton oxidation. Weak dilution PW was treated in a long-term (98 d) continuous: treatment such t hat mass-reduced sulfur compounds were completely oxidized to sulfate, whil e biodegradable organics in dissolved organic carbon (DOC) were simultaneou sly degraded at a removal rate of 55%. The remaining refractory/toxic compo unds following aerobic SOB/GAC treatment were then effectively transformed to biodegradableorganics without pH regulation by adding only 123-154 mi of 30% H2O2, whereas without aerobic SOB/GAC treatment, 670 ml (12% H2O2) was required. Under this innovative approach, DOG in PW was effectively degrad ed at a removal rate of about 95%, with the required amount of H2O2 being r educed by 77% and the occurrence of sudden boiling being completely removed . (C) 1998 Published by Elsevier Science Ltd. All rights reserved.