Toxicity removal efficiency of decentralised sequencing batch reactor and ultra-filtration membrane bioreactors.
As a consequence of the Water Framework Directive and Marine Strategy Framework Directive, there is now more focus on discharges from wastewater treatment plants both to transitional and marine-coastal waters. The constraint to encourage sustainable water policy to prevent water deterioration and reduce or stop discharges has entailed new requirements for existing wastewater treatment plants in the form of advanced wastewater treatment technologies as further suggested by the Integrated Pollution and Prevention Control Bureau. A whole toolbox of physico-chemical and ecotoxicological parameters to investigate commercial and mixed domestic and industrial discharges was considered to check the efficiency of an Activated-Sludge Sequencing Batch Reactor (AS-SBR) and two Ultra-Filtration Membrane Biological Reactors (UF-MBRs) on a small scale decentralised basis. All discharges were conveyed into Venice lagoon (Italy), one of the widest impacted Mediterranean transitional environment. The UF-MBRs were able to provide good quality effluents potentially suitable for non-potable reuse, as well as reducing specific inorganic micro-pollutants concentration (e.g. metals). Conversely, the AS-SBR showed unpredictable and discontinuous removal abilities.
Libralato
Giovanni
G
Environmental Sciences Department, University of Venice Cà Foscari, Campo della Celestia 2737/b, I-30122 Venice, Italy. giovanni.libralato@unive.it
Volpi Ghirardini
Annamaria
A
Avezzù
Francesco
F
D048908:Aliivibrio fischeri / Q000187:drug effects; D000818:Animals; D019149:Bioreactors; D049896:Crassostrea / Q000187:drug effects; D004784:Environmental Monitoring / Q000379:methods; D005374:Filtration; D007220:Industrial Waste / Q000517:prevention & control*; D007558:Italy; D008567:Membranes, Artificial; D049878:Mytilus / Q000187:drug effects; D015203:Reproducibility of Results; D018675:Toxicity Tests; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000633:toxicity; D014876:Water Pollution / Q000517:prevention & control
D007220:Industrial Waste; D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical