TY - JOUR
T1 - Denitrification field study at a wastewater land application site
AU - Duan, Runbin
AU - Fedler, Clifford B.
N1 - Publisher Copyright:
© 2015 American Society of Civil Engineers.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016
Y1 - 2016
N2 - A few risks restrict the sustainable development of wastewater land application including potential nitrogen contamination to groundwater. One important component is nitrogen loss caused by denitrification in a nitrogen mass balance to control nitrogen leaching. Few field studies have been specifically conducted to investigate denitrification in wastewater land application systems. The objective of this study was to quantify denitrification at a wastewater land application site located in a semiarid area. The denitrification rate was measured within three soils at the City of Lubbock Land Application Site in three different months. One-way ANOVA and a t-test were used to compare the differences of averages of many groups of data and of two groups of data at the p < 0.05 level, respectively. If ANOVA or the t-test is not applicable, the Kruskal-Wallis one-way analysis of variance on ranks and the Mann-Whitney rank sum test were employed to compare the differences of medians of many groups of data and of two groups of data at the p < 0.05 level, respectively. The denitrification rate in January was as high as 210 g N2O-N/ha/day, while soil moisture was 19.4%. The denitrification rate ranged from 0.5 to 2,229.2 g N2O-N/ha/day, which were the results of combined effects of environmental variables. Further and more detailed field investigation and quantification of denitrification are required in order for advanced nitrogen mass balance and sustainable nitrogen management at a wastewater land application site.
AB - A few risks restrict the sustainable development of wastewater land application including potential nitrogen contamination to groundwater. One important component is nitrogen loss caused by denitrification in a nitrogen mass balance to control nitrogen leaching. Few field studies have been specifically conducted to investigate denitrification in wastewater land application systems. The objective of this study was to quantify denitrification at a wastewater land application site located in a semiarid area. The denitrification rate was measured within three soils at the City of Lubbock Land Application Site in three different months. One-way ANOVA and a t-test were used to compare the differences of averages of many groups of data and of two groups of data at the p < 0.05 level, respectively. If ANOVA or the t-test is not applicable, the Kruskal-Wallis one-way analysis of variance on ranks and the Mann-Whitney rank sum test were employed to compare the differences of medians of many groups of data and of two groups of data at the p < 0.05 level, respectively. The denitrification rate in January was as high as 210 g N2O-N/ha/day, while soil moisture was 19.4%. The denitrification rate ranged from 0.5 to 2,229.2 g N2O-N/ha/day, which were the results of combined effects of environmental variables. Further and more detailed field investigation and quantification of denitrification are required in order for advanced nitrogen mass balance and sustainable nitrogen management at a wastewater land application site.
KW - Nitrogen mass balance
KW - Sustainable water resources
KW - Wastewater irrigation
KW - Wastewater management
KW - Water reuse and recycling
UR - http://www.scopus.com/inward/record.url?scp=84978500893&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)IR.1943-4774.0000980
DO - 10.1061/(ASCE)IR.1943-4774.0000980
M3 - Article
AN - SCOPUS:84978500893
VL - 142
JO - Journal of Irrigation and Drainage Engineering
JF - Journal of Irrigation and Drainage Engineering
SN - 0733-9437
IS - 2
M1 - 05015011
ER -