Journal article
The use of recycled materials in a biofilter to polish anammox wastewater treatment plant effluent
Chemosphere (Oxford), Vol.296, 134058
02/19/2022
DOI: 10.1016/j.chemosphere.2022.134058
PMID: 35192854
Abstract
Anammox is gaining popularity for treating wastewater containing high-strength ammonia due to lower energy demand compared to conventional nitrification-denitrification processes; however, anammox is reported to increase nitrate loads in the effluent. The objective of this study was to assess the applicability of recycled materials [recycled concrete aggregate (RCA) and rice husks (RH)] as a polishing step to improve anammox reactor effluent quality. Anammox effluents were separately passed through two single-stage columns containing RCA and RH, and one two-stage column (50% RCA, 50% RH) to quantify total N, ammonia, nitrate, nitrite, and phosphate removal efficiencies. Langmuir isotherm experiments were conducted to quantify nitrate, nitrite, and phosphate sorption capacities in the columns. The RCA column exhibited the highest phosphate sorption capacity (0.074 mg/g), while the RH column exhibited higher nitrite and nitrate adsorption (0.063 mg/g and 0.023 mg/g respectively). We created a Hydrus-1D model to estimate pseudo-first-order reaction rates in the columns. Because RCA media can form metal-phosphate precipitates, the fastest phosphate reaction rate (1.58 min
) occurred in the RCA column. The two-stage column demonstrated the greatest overall removals for all nutrients, and removal rates were consistent throughout the experimental period. The two-stage column achieved 15% total N, 94% ammonia-N, 38% nitrate-N, 75% nitrite-N, and 27% phosphate removal. The maximum nitrite, nitrate, and phosphate adsorption capacities in the two-stage column were 0.030 mg/g, 0.017 mg/g, and 0.014 mg/g respectively. This is the first study to demonstrate that recycled materials can successfully be integrated into a biofilter as an effluent polishing step to remove nutrients from anammox wastewater.
Details
- Title: Subtitle
- The use of recycled materials in a biofilter to polish anammox wastewater treatment plant effluent
- Creators
- Debojit S Tanmoy - Department of Civil and Environmental Engineering, University of Iowa, 4105 Seamans Center, Iowa City, IA, 52242, United States; IIHR-Hydroscience and Engineering, University of Iowa, 100 C. Maxwell Stanley Hydraulics Laboratory, Iowa City, IA, 52242, United States; Department of Environmental Engineering, Texas A&M University-Kingsville, MSC 213, 925 W. Avenue B, Kingsville, TX, 78363, USAJuan C Bezares-Cruz - Department of Environmental Engineering, Texas A&M University-Kingsville, MSC 213, 925 W. Avenue B, Kingsville, TX, 78363, USAGregory H LeFevre
- Resource Type
- Journal article
- Publication Details
- Chemosphere (Oxford), Vol.296, 134058
- DOI
- 10.1016/j.chemosphere.2022.134058
- PMID
- 35192854
- NLM abbreviation
- Chemosphere
- eISSN
- 1879-1298
- Language
- English
- Date published
- 02/19/2022
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9984221958402771
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