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TREATMENT OF HIGH ETHANOL CONCENTRATION WASTEWATER BY CONSTRUCTED WETLANDS: ENHANCED COD REMOVAL AND BACTERIAL COMMUNITY DYNAMICS
Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling. (MERO)
2011 (engelsk)Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

Winery wastewater is characterized by its high chemical oxygen demand (COD), seasonal occurrence and variable composition, including periodic high ethanol concentrations. In addition, winery wastewater may contain insufficient inorganic nutrients for optimal biodegradation of organic constituents. Two pilot-scale constructed wetlands (CWs) were used to treat artificial wastewater: the first was amended with ethanol and the second with ethanol, inorganic nitrogen (N) and phosphorus (P). A number of biochemical parameters involved in the degradation of pollutants through CW systems were monitored, including effluent chemistry and bacterial community structures. The nutrient supplemented CW showed efficient COD, N and P removal. Comparison of the COD removal efficiencies of the two CWs showed that N and P addition enhanced COD removal efficiency by up to 16%. Molecular fingerprinting of CW sediment samples using denaturing gradient gel electrophoresis (DGGE) showed that amendment with high concentrations of ethanol destabilized the microbial community structure, but that nutrient supplementation countered this effect.

sted, utgiver, år, opplag, sider
Goa, India: IWA , 2011.
Emneord [en]
Bacterial community structures; Chemical Oxygen Demand; Constructed wetland; Ethanol; Nutrients; Wastewater.
Forskningsprogram
energi- och miljöteknik
Identifikatorer
URN: urn:nbn:se:mdh:diva-11880OAI: oai:DiVA.org:mdh-11880DiVA, id: diva2:400330
Konferanse
First International Water Association - IWA’s specialized conference on “Microbes in Wastewater & Waste Treatment, Bioremediation and Energy Production", January 24 – 27, 2011 at BITS – Pilani, Goa campus, Goa, India
Tilgjengelig fra: 2011-02-28 Laget: 2011-02-25 Sist oppdatert: 2011-02-28bibliografisk kontrollert

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