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|Title:||Nitrogen removal in cold regions trickling filter systems|
|Authors:||United States. Army. Office of the Chief of Engineers|
Reed, Sherwood C.
Diener, C. J. (Carl J.)
Weyrick, Patricia B.
|Publisher:||Cold Regions Research and Engineering Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 86-2.|
Abstract: Trickling filters are found in about 50% of the operating wastewater treatment systems owned by the U.S. Army, and more are likely for any new construction. Control of nitrogen, particularly ammonia in wastewater effluents, is a growing necessity. Ammonia can be removed in trickling filters but the process is temperature-dependent. This study combined an intensive literature review with data collection at full-scale and pilot-scale systems. These results are presented and evaluated. A liquid temperature of at least 7°C is necessary in the filter bed for effective ammonia removal, and a separate single-purpose filter bed dedicated for nitrification is recommended when significant ammonia removal is required at cold regions locations. Criteria and equations are derived for future cold region system designs.
|Rights:||Approved for Public Release, Distribution is Unlimited|
|Appears in Collections:||Special Report|