title: Biodegradation of 2-naphthalensulfonic acid polymers by white-rot fungi: Scale-up into non-sterile packed bed bioreactors.
abstract: This paper presents a first scale up under non-sterile conditions of the biodegradation process of 2-naphthalensulfonic acid polymers (NSAP) contained in a petrochemical wastewater by two white-rot fungi (Bjerkandera adusta and Pleurotus ostreatus). The biodegradation experiment was conducted first in flasks and then in packed-bed bioreactors filled with inert and biodegradable carriers (straw), the latter acting as both physical support and carbon source. Reactor inoculated with P. ostreatus attached on straw worked under non-sterile conditions for three months showing 30 ± 5% NSAP degradation. Respirometric tests showed that the fungal treatment was also able to significantly increase the biodegradable fraction of the wastewater COD, which rose from 9% to 40%. It was observed that the fungal degradation of the straw in the bed releases non-biodegradable by-products. Taking into account this contribution to nbCOD, the combined treatment of fungi and activated sludge could theoretically be able to reduce the original COD by up to 73%.
authors: School of Engineering, University of Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy; Department of Civil and Environmental Engineering, University of Florence, Via Santa Marta 3, 50139 Florence, Italy. Electronic address: laura.palli@dicea.unifi.it.
authors: Laura
authors: L
authors: Palli
authors: Department of Chemistry "Ugo Schiff", Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy.
authors: Antonella
authors: A
authors: Gullotto
authors: Department of Chemistry "Ugo Schiff", Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy.
authors: Silvia
authors: S
authors: Tilli
authors: School of Engineering, University of Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy.
authors: Donatella
authors: D
authors: Caniani
authors: Department of Civil and Environmental Engineering, University of Florence, Via Santa Marta 3, 50139 Florence, Italy.
authors: Riccardo
authors: R
authors: Gori
authors: Department of Chemistry "Ugo Schiff", Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy.
authors: Andrea
authors: A
authors: Scozzafava
mesh_terms: D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology; D052918:Environmental Restoration and Remediation / Q000295:instrumentation / Q000379:methods*; D009282:Naphthalenesulfonates / Q000378:metabolism*; D020076:Pleurotus / Q000378:metabolism*; D011108:Polymers / Q000378:metabolism; D020072:Polyporales / Q000378:metabolism*; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D009282:Naphthalenesulfonates; D011108:Polymers; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: 2-Naphthalensulfonic acid polymers; Biodegradation; Non-sterile conditions; Packed-bed bioreactor; White-rot fungi