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Emerging Technologies March 2013 Some of the areas of current and future interest are as follows: Innovative wastewater collection system designs that provide real-time condition assessment data for asset management decision-making. Determination of the long-term performance and life-cycle cost effectiveness of emerging system rehabilitation techniques, including new and existing materials. Advanced sewer system designs that minimize energy consumption and greenhouse gas emissions. 7.2.2 Removal of Nutrients (or, “Recovery of Resources including Energy and Nutrients”) Nutrients in wastewater effluent can stimulate excessive algae growth, and ammonia is toxic to aquatic life. Increasingly more stringent nutrient discharge limits are prompting research into technologies that are capable of improved nutrient removal. ‘Low energy alternatives to activated sludge’ could also be considered a category or subsection that is an important research objective of this chapter. Some of the processes relevant to resource recovery could be listed under such a subsection as areas in which research could be beneficial, including Anaerobic MBR, Mainstream Deammonification, MBfR improved aeration, AnMBR, microbial fuel cells, and enhanced anaerobic processes. Fact sheets for these technologies are found in other chapters in this document. Some of the areas of current and future research interest are as follows: Advanced sustainable nutrient removal technologies capable of reducing nutrients to concentrations below current limit of technology while minimizing the costs, energy consumption and chemical consumption. Optimization of anaerobic wastewater treatment processes (including nutrient removal) for improved performance, particularly in cold climates. Continued development of full-scale anaerobic MBRs to reliably meet secondary and advanced treatment requirements under various operating conditions and climates and to meet stringent reclaimed water standards with subsequent disinfection. Optimized nitritation-denitritation and evaluating operating conditions and/or improved processes to promote nitrite oxidizing bacteria (NOB) suppression and washout. Application of deammonification and nitritation/denitritation processes (currently used for high temperature sidestreams) to treat low temperature mainstream flows. Use of MBfR technology to improve energy efficiency of aerobic processes or to provide hydrogen as an alternative electron acceptor for denitrification or oxidation of other reduced contaminants. Improved understanding of the active fraction of denitrifier performance and kinetics leading to improved design and operation. Improved understanding of the portion of organic nitrogen in the final effluent produced within a wastewater treatment plant (WWTP) and development of new processes or improved operational control strategies to minimize its production (i.e., non-reactive nitrogen in the plant that could theoretically become reactive when discharged). 7-2 Wastewater Treatment and In-Plant Wet Weather ManagementPDF Image | Emerging Tech for Wastewater Treatment
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