Influence of soluble microbial products (SMP) on wastewater disinfection byproducts: trihalomethanes and haloacetic acid species from the chlorination of SMP.
BACKGROUND
Effluent organic matter from biological wastewater treatment plants is composed of degradation products and soluble microbial products (SMP). Protein, polysaccharide, humic acid, and DNA were major biomolecules of SMP. Little is known about the effects of SMP as microbially derived precursors on disinfection byproduct formation and speciation in biologically treated wastewater. In addition, there has never been any attempt to directly chlorinate the major biomolecules of SMP.


METHODS
In this study, model compounds (bovine serum albumin, starch, DNA, and humic acid) and SMP collected from a sequencing batch reactor (SBR) were chlorinated to verify the trihalomethane and haloacetic acid species that were produced from them.


CONCLUSIONS
The results showed that chloroform, dichlorobromomethane, dichloroacetic acid, and trichloroacetic acid were generated from the chlorination of SMP in the SBR, and there was a close relationship between the species predicted from the model chemical compounds and those obtained from the SMP.
Wei
Yuan-yuan
YY
Department of Environmental Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433, China.
Liu
Yan
Y
Zhang
Yun
Y
Dai
Rui-hua
RH
Liu
Xiang
X
Wu
Jin-jian
JJ
Zhang
Qiang
Q
D000085:Acetates / Q000737:chemistry*; D019149:Bioreactors; D002713:Chlorine / Q000737:chemistry; D004203:Disinfection; D022882:Trihalomethanes / Q000737:chemistry*; D014871:Water Microbiology; D014873:Water Pollutants / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
D000085:Acetates; D022882:Trihalomethanes; D014873:Water Pollutants; D002713:Chlorine