Evaluation of disinfection by-products (DBPs) formation
Trichloromethane (TCM) was the dominant product among all DBPs detected. The anammox euent has a low specic TCM formation potential of 0.778 mmol/mmol C and a trichloronitromethane (TCNM) formation potential of 0.0725 mmol/mmol C, leading to a TCM and TCNM formation potential ratio of 10.7.
Evaluation of disinfection by-products (DBPs) formation
DBPs formation potential from anammox process has never been studied before. Little information has been known concerning DBPs formation potential of anammox-treated effluent. Therefore, the first objective of this study was to give a preliminary evaluation of DBPs formation potential of anammox-treated water.
Enhanced coagulation for mitigation of disinfection by
The extent of DBP formation potential reduction by coagulation was the same as that of the process with or without pre-ozonation. The total reduction in DBP formation potential was the same for the overall process, regardless of the point of ozonation with respect to coagulation. [125] Yellow River (China) COD Mn (mg/L): 4.61–6.00
Predicting Disinfection By-Product Formation Potential in Water
Water samples from W/WWTPs across the USA were collected and DBP formation potentials (DBPFPs) in the presence of free chlorine and chloramine were obtained for trihalomethane (THM), haloacetic...
DBP Formation Potential - Real Tech Water
DBP Formation Potential - Real Tech Water DBP AND FORMATION POTENTIAL MONITORING Chemical disinfection can cause the formation of harmful byproducts when disinfectants like chlorine react with naturally occurring compounds such as organic matter in water.
- What is DBP formation potential (dbpfp)?
- DBP formation potential (DBPFPs) experiments are designed to maximize reactions between the precursors and disinfectant (e.g., Krasner et al., 2008). With knowledge of trends between precursors and DBPFP, unit processes capable of reducing more important precursors can be employed to reduce overall DBP levels in treated water.
- What are DBP precursors?
- DBP precursors are defined as a mixture of organic and inorganic compounds that can form DBPs under some level of disinfection. DBP formation potential (DBPFPs) experiments are designed to maximize reactions between the precursors and disinfectant (e.g., Krasner et al., 2008).
- What are the external factors in DBP estimation models?
- Unlike other DBP estimation models, the models in this study did not consider the external factors (e.g., disinfection dosage, temperature, dosage, etc) in order to streamline a better understanding of the DBP precursors’ origin, constituent, reactivity, and adjusting factor.
- What is the formula for dbpfp?
- Equation (1B): DBPFP = a × DOC b × UVA 254 c × ( Br + 1) d × ( N ∗ + 1) e. Analytical variances of various types of waters. Note: The units of DOC and bromide are mg/L; UVA is 1/cm; AV is %; SE and DBPFP concentrations are μg/L except NDMAFP (ng/L) for weight-based models; the units are μM/L except NDMA (nM/L) for molar-based models. 4. Conclusions
- Can power function models predict dbpfp levels in potable water sources?
- Conclusions Power function models based upon DOC, UVA and bromide were able to predict DBPFP levels across several classes of C-DBPs and N-DBPs in both potable water sources and wastewater effluents.
- What can we expect from future researches on emerging DBP precursors?
- Future researches may target to determination of the characteristics of emerging DBPs (e.g., NDMA) precursors, refinement of the models of this study, and/or validation of the models with additional database. The authors are grateful of AwwaRF (Water Research Foundation) for its financial, technical, and administrative assistance (Project # 2948 ).
