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Electrolyzed Water Spray Scrubber for Removing Ammonia from Air

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Transactions of the ASABE. 58(4): 1069-1078. (doi: 10.13031/trans.58.10973) @2015
Authors:   Amir M. Samani Majd, Ahmad Kalbasi Ashtari, Gerald L. Riskowski, Saqib Mukhtar, Lingying Zhao, Wei Fang
Keywords:   Ammonia gas, Ammonia scrubbing efficiency, Chloramine, Electrolyzed water, Free available chlorine, Spray wet scrubber.

Abstract. Ammonia (NH3) emissions from animal feeding operations (AFOs) are the source of a number of environmental issues. Wet spray scrubbers using non-acidic solutions might be a new approach for NH3 mitigation from AFOs. A lab-scale spray scrubber was built to clean 0.024 m3 s-1 of an NH3/air mixture with an average NH3 concentration of 20 ppmv. Three variables including contact time, nozzle type, and scrubbing solution were investigated to evaluate their effects on the ammonia removal efficiency of the scrubber. The contact times were set to 0.3, 0.6, and 0.9 s, which were achieved by changing the elevation of the spray nozzle. Two types of spray nozzles were studied. The nozzles had full-cone spray patterns with different spray angles and different droplet sizes. Reverse osmosis (RO) NH3 gas from air. The maximum removal efficiency of 56% was achieved with the 3 mass ratios lower than 7.6 in order to avoid N2, Cl2, and NH3 gas losses from the scrubbing solution.

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