title: Textile wastewater treatment: aerobic granular sludge vs activated sludge systems.
abstract: Textile effluents are characterised by high content of recalcitrant compounds and are often discharged (together with municipal wastewater to increase their treatability) into centralized wastewater treatment plants with a complex treatment scheme. This paper reports the results achieved adopting a granular sludge system (sequencing batch biofilter granular reactor - SBBGR) to treat mixed municipal-textile wastewater. Thanks to high average removals in SBBGR (82.1% chemical oxygen demand, 94.7% total suspended solids, 87.5% total Kjeldahl nitrogen, 77.1% surfactants), the Italian limits for discharge into a water receiver can be complied with the biological stage alone. The comparison with the performance of the centralized plant treating the same wastewater has showed that SBBGR system is able to produce an effluent of comparable quality with a simpler treatment scheme, a much lower hydraulic residence time (11 h against 30 h) and a lower sludge production.
authors.affiliation: Department of Water Engineering and Chemistry, Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy. Electronic address: adriana.lotito@libero.it.
authors.forename: Adriana Maria
authors.initials: AM
authors.lastname: Lotito
authors.affiliation: CNR-IRSA, Water Research Institute - National Research Council, Viale De Blasio 5, 70132 Bari, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: De Sanctis
authors.affiliation: CNR-IRSA, Water Research Institute - National Research Council, Viale De Blasio 5, 70132 Bari, Italy. Electronic address: claudio.diiaconi@ba.irsa.cnr.it.
authors.forename: Claudio
authors.initials: C
authors.lastname: Di Iaconi
authors.affiliation: CIDA s.p.a., Via Laghetto 1, 22073 Fino Mornasco, CO, Italy.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Bergna
mesh_terms: D000332:Aerobiosis; D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology; D005374:Filtration / Q000295:instrumentation; D017404:In Situ Hybridization, Fluorescence; D007220:Industrial Waste / Q000032:analysis*; D007558:Italy; D012722:Sewage / Q000382:microbiology*; D013784:Textiles; D062065:Wastewater / Q000382:microbiology*; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D012722:Sewage; D062065:Wastewater
keywords: Centralized treatment plant; Ozonation; SBBGR treatment; Sludge production; Textile effluents