Integrating the selection of PHA storing biomass and nitrogen removal via nitrite in the main wastewater treatment line. (January 2016)

• Record Type: Journal Article
• Authors: Basset, N.; Katsou, E.; Frison, N.; Malamis, S.; Dosta, J.; Fatone, F.
• Is Part Of: Bioresource technology. Volume 200(2016)
• Page Start: 820
• Page End: 829
• Publication Date: 2016-01
• Subjects: BOD biochemical oxygen demand -- C/N carbon to nitrogen ratio -- C/N/P carbon to nitrogen and phosphorus ratio -- COD chemical oxygen demand -- COD/N/P chemical oxygen demand to nitrogen and phosphorus ratio -- Cs dissolved oxygen saturation concentration -- Cs′ dissolved oxygen saturation concentration in wastewater at the process conditions -- Cs(20 °C, 1 atm) dissolved oxygen saturation concentration in clean water at standard conditions -- DO dissolved oxygen -- F fouling factor -- F/M food to microorganisms ratio -- FWDs food waste disposers -- HRT hydraulic retention time -- kd decay coefficient -- LBODoxidised average BOD oxidised aerobically -- LNitrified average ammonium loading rate that is oxidised aerobically -- NH4-N ammonium -- NO2-N nitrite -- NO3-N nitrate -- OFMSW FL organic fraction of municipal waste fermentation liquid -- OLR organic loading rate -- ORP oxidation reduction potential -- OTR oxygen transfer rate -- OUR oxygen uptake rate -- PHA polyhydroxyalkanoate -- PHB polyhydroxybutyrate -- PHV polyhydroxyvalerate -- PO4-P phosphate -- PS & OFMSW FL primary sludge and organic fraction of municipal waste fermentation liquid -- qPHA PHA storage rate -- qVFA volatile fatty acid removal rate -- sAUR specific ammonium uptake rate -- SBR sequencing batch reactor -- sCOD soluble chemical oxygen demand -- sNUR specific nitrogen uptake rate -- SOTE specific oxygen transfer efficiency -- SOTR oxygen transfer rate at standard conditions -- sOUR specific oxygen uptake rate -- SRT sludge retention time -- T operating temperature -- TKN total Kjeldahl nitrogen -- TS total solids -- TSS total suspended solids -- TVS total volatile solids -- VFAs volatile fatty acids -- vNLR volumetric nitrogen loading rate -- vOLR volumetric organic loading rate -- VSS volatile suspended solids -- WAS waste activated sludge -- WWTP wastewater treatment plant -- YOX/COD oxidation yield based on total COD -- YOX/VFA oxidation yield based on VFA -- YPHA/COD PHA storage yield based on total COD -- YPHA/VFA PHA storage yield based on VFA -- YX/COD growth yield based on total COD -- YX/VFA growth yield based on VFA -- α relative oxygen transfer factor in process versus clean water -- β relative dissolved oxygen saturation in process versus clean water -- θ correction factor; Polyhydroxyalkanoates -- Nitrogen removal -- Nitritation/denitritation -- Fermentation liquid -- Feast/famine; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.10.063
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Selection of PHA storing biomass was integrated with N removal in municipal WWTP. N removal via nitrite was achieved using fermented biowaste as carbon source. A novel aerobic feast and anoxic famine regime was adopted for PHA selection. Denitritation driven by the stored PHA was achieved with 83 ± 13% of nitrogen removal. Oxygen requirement saving of 50% was made compared to usual PHA recovery. Abstract: A novel scheme was developed for the treatment of municipal wastewater integrating nitritation/denitritation with the selection of polyhydroxyalkanoates (PHA) storing biomass under an aerobic/anoxic, feast/famine regime. The process took place in a sequencing batch reactor (SBR) and the subsequent PHA accumulation in a batch reactor. The carbon source added during the selection and accumulation steps consisted of fermentation liquid from the organic fraction of municipal solids waste (OFMSW FL) (Period I) and OFMSW and primary sludge fermentation liquid (Period II). Selection of PHA storing biomass was successful and denitritation was driven by internally stored PHA during the famine phase. Under optimum conditions of SBR operation ammonia removal was 93%, reaching a maximum nitrite removal of 98%. The treated effluent met the nitrogen limits, while PHA-storing biomass was successfully selected. The maximum accumulation of PHA was 10.6% (wt.) since the nutrients present in the carbon source promoted bacterial growth.