Towards online optimal coagulation for DBP reductions**

本项目旨在探索PeCOD®在饮用水水质控制中的适用性。PeCOD®**测量样品中包含的有机物种氧化产生的光电流电荷，以**量化有机物。PeCOD®测量水中天然存在的有机物的总可溶化学需氧量(COD)，因此有可能作为DBP的替代品。结合**和连续测量的能力，PeCOD®可用作相对简单、快速和低成本的**替代品，从而为消毒副产品(DBPs)的主动实时管理提供了可能。这个项目的**目标是在饮用水领域进行一项概念验证研究，特别是**通过优化混凝去除有机物来控制DBPs。PeCOD®分析将与**常见的混凝控制变量相结合，以评估三卤代甲烷(THMs)和卤代乙酸(HAA)**的形成。不同类型、不同有机质数量和类型的地表水将被取样**，并接受不同的氯化条件。在混凝和过滤的水之后，将进行DBP**生成电位分析，以确定从测试的**水中产生的THM、HAAs和其他不受管制的DBP。PeCOD®与254 nm波长的紫外线吸收(UVA254)测量相结合，**可以通过替代的特定UVA254提供关于有机物性质的进一步信息(不仅仅是定量)，**指示疏水性、分子量和易混凝去除**等特性。这种定性评估是更好地控制和估计所产生的**DBPs的关键。该项目将产生一个独特的、高分辨率的水质、混凝**条件的数据集，以及作为PeCOD®前体分析功能产生的DBPs。

This project aims at exploring the applicability of PeCOD® to drinking water quality control. The PeCOD®**measures photocurrent charge originating from the oxidation of organic species contained in a sample to**quantify organic matter. The PeCOD® measures the total soluble chemical oxigen demand (COD) from the**naturally occurring organic matter in water and has thus the potential to serve as surrogate for DBPs. Coupled**with the capability of continuous measurements, PeCOD® can be used as a relatively simple, fast, and low-cost**surrogate, opening the possibility for proactive real-time management of disinfection by-products (DBPs). The**objective of this project is to conduct a proof-of-concept study in the drinking water area, in particular the**control of DBPs by optimizing coagulation for organic matter removal. PeCOD® analyses will be coupled to**common coagulation control variables to estimate trihalomethanes (THMs) and haloaceteic acid (HAA)**formation. Different type of surface waters with varying organic matter quantities and types will be sampled**and submitted to various chlorination conditions. The coagulated and filtered waters will be followed by DBP**formation potential assays to determine resulting THMs, HAAs, and other non-regulated DBPs from the tested**waters. PeCOD® coupled with measurements of ultraviolet absorbance at 254 nm wavelength (UVA254),**could give further information on the nature of the organic matter (not just its quantification) through an**alternative specific UVA254 indicating characteristics such as hydrophobicity, molecular weight, and ease of**removal by coagulation. Such qualitative assessment is key to the better control and estimation of resulting**DBPs. This project will result in a unique and highly-resolved dataset of water qualities, coagulation**conditions, and resulting DBPs as a function of the PeCOD® precursor analysis.