Journal article
Submerged attached-growth reactors as lagoon retrofits for cold-weather ammonia removal: performance and sizing
Water science and technology, Vol.78(8), pp.1625-1632
11/2018
DOI: 10.2166/wst.2018.399
PMID: 30500786
Abstract
Small towns that operate wastewater treatment lagoons struggle to meet ammonia limits in cold weather. Here we report the performance of a lagoon, retrofitted with submerged attached growth reactors (SAGRs
), to provide insight on ammonia effluent compliance and optimal SAGR sizing as functions of water temperature. The lagoon-SAGR water resource recovery facility (WRRF) removed 95% of incoming ammonia with 94% attributed to the SAGRs. The high treatment capacity of the two primary SAGRs, evidenced by nearly continuous dissolved oxygen saturation and exceedingly high ammonia removals, suggested the two secondary SAGRs were essentially unnecessary and that all four SAGRs should be reduced in size. Furthermore, without the secondary SAGRs, the primary SAGR effluent would have exceeded the permitted ammonia discharge limit only four times in the 2.5-year study. At its current size, the lagoon-SAGR WRRF never exceeded permitted ammonia limits, but size reductions should be used for future retrofits.
Details
- Title: Subtitle
- Submerged attached-growth reactors as lagoon retrofits for cold-weather ammonia removal: performance and sizing
- Creators
- Rebecca R Mattson - University of IowaMatt Wildman - HR Green Incorporated, Cedar Rapids, IA 52404, USACraig Just - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Water science and technology, Vol.78(8), pp.1625-1632
- DOI
- 10.2166/wst.2018.399
- PMID
- 30500786
- NLM abbreviation
- Water Sci Technol
- ISSN
- 0273-1223
- eISSN
- 1996-9732
- Language
- English
- Date published
- 11/2018
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9984197253902771
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