Turnkey Arsenic Removal for Small Water Systems

Period of Performance: 06/23/2003 - 03/23/2004


Phase 1 SBIR

Recipient Firm

ADA Technologies, Inc.
8100 Shaffer Parkway Array
Littleton, CO 80127
Principal Investigator


The new 10-ppb drinking water standard for arsenic is expected to impact 10% of the nation's community drinking water systems. Large water systems can remove arsenic through their chemical coagulation processes; however, compliance is a much greater challenge for systems supplying fewer than 10,000 users, so called "small water systems." The goal of this multiphase program is to demonstrate an efficient system for arsenic removal for small water systems. Cost-effective arsenic removal at smaller scale requires technologies which are simple to operate and maintain. Adsorption systems can achieve this goal if the incoming water is properly conditioned so that the adsorbent can operate at high efficiency. This project will couple an automated pretreatment module with ADA's Amended SilicateT arsenic adsorbent. An arsenic sensor will provide online tracking of effluent concentration. Under Phase I, the team will develop and test a small-scale prototype system. Laboratory characterization studies will be followed by a field trial of the system. Performance and cost assessments under Phase I will guide the Phase II construction of a 100-gpm test unit for extensive field testing and evaluation. The final system will provide automated, operator-friendly arsenic treatment for small system users such as military bases and small communities. The EPA estimates that there are approximately 2,294 community and over 1,000 non-community (factories, hospitals, etc.) water systems serving 10,000 people or less that will have to install some form of arsenic treatment system. The proposed approach of a turnkey treatment system will simplify installation and maintenance of the hardware, making arsenic removal less costly for small water systems. ADA has teamed with Current Water Technology, experts in electrochemical water treatment, and CH2M Hill, one of the nation's leading water engineering firms, to develop and commercialize this technology.