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Performance And Fouling In Pre-Denitrification Membrane Bioreactors Treating High-Strength Wastewater From Food Waste Disposers, Jongkeun Lee, Jae Woo Lee, Young Mo Kim, Chul Park, Ki Young Park
Performance And Fouling In Pre-Denitrification Membrane Bioreactors Treating High-Strength Wastewater From Food Waste Disposers, Jongkeun Lee, Jae Woo Lee, Young Mo Kim, Chul Park, Ki Young Park
Civil and Environmental Engineering Faculty Publication Series
The study investigated the performance of the pre-denitrification membrane bioreactor (MBR) process to treat high-strength wastewater generated from food waste disposals. Extracellular polymeric substances (EPS) as membrane foulant and microbial community profiles were analyzed under different hydraulic retention time (HRT) operation conditions. The pre-denitrification MBR was effective for treating food wastewater with high chemical oxygen demand (COD)/N resulting in high total nitrogen (TN) removal efficiency. The operational data showed that effluent qualities in terms of COD, TN, and TP improved with longer HRT. However, membrane fouling potential as shown by specific membrane fouling rate and specific resistance to filtration (SRF) …
The Role Of Inorganic Nitrogen In Successful Formation Of Granular Biofilms For Wastewater Treatment That Support Cyanobacteria And Bacteria, Kristie Stauch-White, Varun N. Srinivasan, W. Camilla Kuo-Dahab, Chul Park, Caitlyn S. Butler
The Role Of Inorganic Nitrogen In Successful Formation Of Granular Biofilms For Wastewater Treatment That Support Cyanobacteria And Bacteria, Kristie Stauch-White, Varun N. Srinivasan, W. Camilla Kuo-Dahab, Chul Park, Caitlyn S. Butler
Civil and Environmental Engineering Faculty Publication Series
Recently, the use of phototrophs for wastewater treatment has been revisited because of new approaches to separate them from effluent streams. One manifestation uses oxygenic photogranules (OPGs) which are dense, easily-settleable granular biofilms of cyanobacteria, which surrounding populations of heterotrophs, autotrophs, and microalgae. OPGs can remove COD and nitrogenous compounds without external aeration. To better grow and maintain biomass in the proposed wastewater process, this study seeks to understand the factors that contribute to successful granulation. Availability of initial inorganic nitrogen, particularly ammonium, was associated with successful cultivation of OPGs. In the first days of granulation, a decrease in ammonium …
Effects Of Increased Wind Power Generation On Mid-Norway’S Energy Balance Under Climate Change: A Market Based Approach, Baptiste François, Sara Martino, Lena S. Tøfte, Benoit Hingray, Birger Mo, Jean-Dominique Creutin
Effects Of Increased Wind Power Generation On Mid-Norway’S Energy Balance Under Climate Change: A Market Based Approach, Baptiste François, Sara Martino, Lena S. Tøfte, Benoit Hingray, Birger Mo, Jean-Dominique Creutin
Civil and Environmental Engineering Faculty Publication Series
Thanks to its huge water storage capacity, Norway has an excess of energy generation at annual scale, although significant regional disparity exists. On average, the Mid-Norway region has an energy deficit and needs to import more electricity than it exports. We show that this energy deficit can be reduced with an increase in wind generation and transmission line capacity, even in future climate scenarios where both mean annual temperature and precipitation are changed. For the considered scenarios, the deficit observed in winter disappears, i.e., when electricity consumption and prices are high. At the annual scale, the deficit behaviour depends more …