Treatment of industrial wastewaters by microalgal bacterial flocs in sequencing batch reactors.
Microalgal bacterial flocs in sequencing batch reactors (MaB-floc SBRs) represent a novel approach to wastewater treatment. In this approach, mechanical aeration is replaced by photosynthetic aeration and MaB-floc settling separates the treated wastewater from the produced biomass. However, its technical potential for industrial wastewaters needs to be shown. Therefore, wastewaters of aquaculture, manure treatment, food-processing and chemical industry were treated in MaB-floc SBRs. This treatment resulted in significantly different nutrient removal rates and effluent qualities among wastewaters. A high MaB-floc production was obtained for all wastewaters, ranging from 0.14 to 0.26g total suspended solids Lreactor(-1)day(-1). A major advantage of MaB-flocs is the harvesting via a filter press with a large pore size of 200μm, resulting in MaB-floc recoveries of 79-99% and cakes containing 12-21% dry matter. These results may contribute to evolving MaB-floc SBRs as a valuable remediation strategy, especially for aquaculture and food-processing wastewaters.
Laboratory for Industrial Water and Eco-Technology (LIWET), Faculty of Bioscience Engineering, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium(4); Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Gent, Belgium(5). Electronic address: sofie.van.den.hende@ugent.be.
Sofie
S
Van Den Hende
Laboratory for Industrial Water and Eco-Technology (LIWET), Faculty of Bioscience Engineering, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium(4); Ecole des Métiers de L'Environnement (EME), Campus de Ker Lann, Avenue Robert Schuman, 35170 Bruz, France(6). Electronic address: erwancarre@ecole-eme.com.
Erwan
E
Carré
Laboratory for Industrial Water and Eco-Technology (LIWET), Faculty of Bioscience Engineering, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium(4); Ecole des Métiers de L'Environnement (EME), Campus de Ker Lann, Avenue Robert Schuman, 35170 Bruz, France(6). Electronic address: cocaud.elodie@gmail.com.
Elodie
E
Cocaud
Laboratory for Industrial Water and Eco-Technology (LIWET), Faculty of Bioscience Engineering, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium(4).
Veerle
V
Beelen
Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Gent, Belgium(5). Electronic address: nico.boon@ugent.be.
Nico
N
Boon
Laboratory for Industrial Water and Eco-Technology (LIWET), Faculty of Bioscience Engineering, Ghent University, Graaf Karel de Goedelaan 5, B-8500 Kortrijk, Belgium(4). Electronic address: han.vervaeren@ugent.be.
Han
H
Vervaeren
D017756:Aquaculture; D018533:Biomass; D019149:Bioreactors; D002617:Chemical Industry; D019649:Food Industry; D007220:Industrial Waste; D058086:Microalgae; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater; D018508:Water Purification / Q000295:instrumentation*
D007220:Industrial Waste; D062065:Wastewater
Bio-flocculation; Harvest; MaB-floc; Microalgae; Wastewater