TY - GEN
T1 - Impact of wastewater treatment processes on organic carbon, organic nitrogen, and DBP precursors in effluent organic matter
AU - Krasner, Stuart W.
AU - Westerhoff, Paul
AU - Chen, Baiyang
AU - Rittmann, Bruce
AU - Amy, Gary
AU - Nam, Seong Nam
PY - 2006
Y1 - 2006
N2 - Unintentional, indirect wastewater reuse is occurring as upstream wastewater treatment plant (WWTP) discharges impact downstream drinking water treatment plants. As part of a project to evaluate the contribution of wastewater to disinfection by-product (DBP) formation in drinking water, one of the objectives was to compare different WWTP processes for the control of dissolved organic carbon and nitrogen (DOC and DON), and DBP precursors in effluent organic matter (EfOM). Nitrification plays a key role in determining the quality of EfOM in terms of traditional wastewater parameters, natural organic matter character, and DBP-related parameters. Some nitrification strongly altered the levels of total Kjeldahl nitrogen (TKN), ammonia (NH3-N), DON, carbonaceous biochemical oxygen demand (CBOD), DOC, ultraviolet absorbance (UVA), and chemical oxygen demand. Good nitrification (NH3-N <2 mg/L) augmented the changes for TKN, NH3-N, and CBOD; reduced the concentration of biodegradable organic carbon (BDOC); and dramatically changed the ratio of BDOC/DOC. During wastewater treatment, some of the particulate and DON was transformed to biomass, NH3-N, nitrite, nitrate, and/or nitrogen gas, whereas a portion of the DOC was transformed to biomass, carbon dioxide, methane, and/or other gases. Although nitrification reduced the level of UVA, it resulted in an increase in specific UVA (SUVA). This was probably due to preferential removal of the less UV-absorbing (non- humic) portion of the DOC during biological treatment.
AB - Unintentional, indirect wastewater reuse is occurring as upstream wastewater treatment plant (WWTP) discharges impact downstream drinking water treatment plants. As part of a project to evaluate the contribution of wastewater to disinfection by-product (DBP) formation in drinking water, one of the objectives was to compare different WWTP processes for the control of dissolved organic carbon and nitrogen (DOC and DON), and DBP precursors in effluent organic matter (EfOM). Nitrification plays a key role in determining the quality of EfOM in terms of traditional wastewater parameters, natural organic matter character, and DBP-related parameters. Some nitrification strongly altered the levels of total Kjeldahl nitrogen (TKN), ammonia (NH3-N), DON, carbonaceous biochemical oxygen demand (CBOD), DOC, ultraviolet absorbance (UVA), and chemical oxygen demand. Good nitrification (NH3-N <2 mg/L) augmented the changes for TKN, NH3-N, and CBOD; reduced the concentration of biodegradable organic carbon (BDOC); and dramatically changed the ratio of BDOC/DOC. During wastewater treatment, some of the particulate and DON was transformed to biomass, NH3-N, nitrite, nitrate, and/or nitrogen gas, whereas a portion of the DOC was transformed to biomass, carbon dioxide, methane, and/or other gases. Although nitrification reduced the level of UVA, it resulted in an increase in specific UVA (SUVA). This was probably due to preferential removal of the less UV-absorbing (non- humic) portion of the DOC during biological treatment.
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M3 - Conference contribution
AN - SCOPUS:84871487912
SN - 9781604237306
T3 - American Water Works Association - Water Quality Technology Conference and Exposition 2006: Taking Water Quality to New Heights
SP - 667
EP - 691
BT - American Water Works Association - Water Quality Technology Conference and Exposition 2006
T2 - Water Quality Technology Conference and Exposition 2006: Taking Water Quality to New Heights
Y2 - 5 November 2006 through 9 November 2006
ER -