Evaluation of an AOS reactor treatment train for stormwater effluents

市政、商业、工业和农业生产过程产生大量被细菌、病毒和有机/无机化合物污染的废水**。加拿大市政当局目前感兴趣的是需要处理城市雨水，这是一种废水，因为它具有与城市污水相似的特征。废水可以使用生物好氧和厌氧处理、化学混凝、膜、光催化、吸附、高级氧化过程和臭氧化等技术进行处理。最近，由于电化学处理具有同时消毒和氧化/还原化合物的能力，它已成为人们感兴趣的领域。电化学处理的优点包括能够在环境温度和压力下处理废水，固体废物产品的产生有限，以及过程化学品的添加有限。缺点包括有限的处理率，由于反应被限制在电极表面和大量的悬浮固体，潜在的高能量消耗，和化学副产品的产生，可能比原来的化合物更有毒。可以考虑使用电化学处理作为处理过程的一部分，以克服由于高悬浮固体浓度而导致的有限处理速率。例如，使用混凝/絮凝预处理可以在电化学处理过程之前去除固体。BioLargo Water一直在开发一种新的电化学技术，用于废水处理，称为高级氧化系统（AOS），针对废水，将同时解决消毒和去污问题。迄今为止，AOS对农业用水、家禽废水和井水等水质均表现出优异的消毒效果。然而，对于高总悬浮固体（TSS）的废水，AOS工艺的性能不太成功，随着时间的推移，这些废水会污染反应器。因此，本项目的目标是评估AOS系统作为处理工艺培训的一部分，包括旨在降低TSS水平的预处理工艺。

Municipal, commercial, industrial, and agricultural processes create large volumes of wastewaters**contaminated by bacteria, viruses, and organic/inorganic compounds. Of current interest for Canadian**municipalities is the need for treatment of municipal stormwater which is a type of wastewater given it has**similar characteristics to municipal sewage. Wastewaters can be treated using technologies including biological**aerobic and anaerobic treatment, chemical coagulation, membranes, photocatalysis, adsorption, advance**oxidation processes, and ozonation. Recently, electrochemical treatment has become of interest given its ability**to provide simultaneous disinfection and oxidation/reduction of chemical compounds. Advantages of**electrochemical treatment include the ability to treat wastewaters at ambient temperature and pressure, limited**production of solid waste products, and limited addition of process chemicals. Disadvantages include limited**treatment rates due to reactions being restricted to the electrode surfaces and to high amounts of suspended**solids, potential for high energy consumption, and creation of chemical byproducts that may be more toxic than**the original compounds. The use of electrochemical treatment as part of a treatment process train may be**considered to overcome the limited treatment rates due to high suspended solids concentrations. For instance,**the use of coagulation/flocculation pretreatment could remove solids prior to an electrochemical treatment**process. BioLargo Water has been developing a novel electrochemical technology for wastewater treatment**termed the Advanced Oxidation System (AOS) targeting wastewaters that will address both disinfection and**decontamination. Thus far, the AOS has shown excellent disinfection performance for waters including**agricultural waters, poultry wastewaters and well waters. However, the performance of the AOS process has**been less successful for wastewaters with high total suspended solids (TSS) that foul the reactor over time.**Thus, the goal of this project is to assess the AOS system as part of a treatment process train including a**pretreatment process meant to reduce TSS levels.