Performance of Nitrogen-Removing Bioretention Systems for Control of Agricultural Runoff

被引:54
作者
Ergas, Sarina J. [1 ]
Sengupta, Sukalyan [2 ]
Siege, Ryan [3 ]
Pandit, Arka [4 ]
Yao, Yifu [2 ]
Yuan, Xin [5 ]
机构
[1] Univ S Florida, Dept Civil & Environm Engn, Tampa, FL 33620 USA
[2] Univ Massachusetts, Dept Civil & Environm Engn, Dartmouth, MA USA
[3] Tighe & Bond, Westfield, MA 01085 USA
[4] Georgia Inst Technol, Atlanta, GA 30332 USA
[5] Univ Massachusetts, Dept Civil & Environm Engn, Amherst, MA 01003 USA
来源
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE | 2010年 / 136卷 / 10期
关键词
Storm-water management; Agriculture; Nitrification; Denitrification; Sulfur; Wood; STORM-WATER MANAGEMENT; INDUSTRIAL WASTE-WATER; CONSTRUCTED REED BEDS; AUTOTROPHIC DENITRIFICATION; PHOSPHORUS REMOVAL; ELEMENTAL SULFUR; NITRATE REMOVAL; BARRIER SYSTEM; MEDIA; REACTORS;
D O I
10.1061/(ASCE)EE.1943-7870.0000243
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This research evaluated nitrogen-removing bioretention systems for control of nutrients, organics, and solids in agricultural runoff. Pilot-scale experiments were conducted with bioretention systems incorporating aerobic nitrification and anoxic denitrification zones with sulfur or wood chips as denitrification substrates. Varying hydraulic loading rates (HLRs), influent concentrations, and wetting and drying periods were applied to the units during laboratory and two seasons of field tests with dairy farm runoff. Total N removal efficiencies greater than 88% were observed in both units with synthetic storm water. In first-season field tests, moderate removal efficiencies were observed for chemical oxygen demand (46%), suspended solids (69%), total phosphorous (TP) (66%), and total N (65%). During the second season, operational changes in the farm resulted in lower organic, solids, and nutrient loadings resulting in improved effluent quality, especially for suspended solids (81% removal) and total N (82% removal). The systems were not hydraulically overloaded even at 20 times the normal HLR.
引用
收藏
页码:1105 / 1112
页数:8
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