Treating organic carbon (TOC) or Natural Organic Matter (NOM) in drinking water
Organic carbon or Natural Organic Matter (NOM) has been a contaminate of concern in drinking water production for years. Early on in the development of the ACTIFLO® process it was apparent that organics removal was going to be a corner stone of the applications it can be applied to. Just about every surface water source has some level of organics to contend with. Over the past 12 years of operating experience, the ACTIFLO® process has shown that it can treat varying levels of influent organic carbon (from 3 - 25 mg/l) and consistently produce a settled water quality with organic carbon levels that helps a water treatment plant meet today's regulatory requirements for organic carbon removal as well as the production of disinfection by-products. This level organics removal of contaminants of emerging concern is typically achieved with standard coagulation coupled with ballasted flocculation or with enhanced coagulation combined with ballasted flocculation.
When the superior organics removal capabilities of the ACTIFLO® process are not enough or when other surface water contaminants are a concern such as endocrine disruptors, inorganic carbon and pesticides the ACTIFLO® process can be coupled with powdered activated carbon (PAC). The combination of these two treatment techniques is called The ACTIFLO® CARB process.
The ACTIFLO® CARB process combines the benefits of microsand ballasted clarification with the adsorption capacities of PAC. With the addition of a PAC contact tank and a PAC recirculation loop, enhanced organic removal, TOC removal and DOC removal (up to 50% more than ACTIFLO clarification alone) can be achieved while maximizing the use of the PAC adsorption sites before being wasted. The ACTIFLO® CARB process has also been shown to remove endocrine disruptors, various agricultural pesticides and organics from municipal wastewater.