Brown and Caldwell Home Page

Brown and Caldwell engineers and scientists are technical and thought leaders in the environmental sector. Meet the people who have been advancing innovation for more than 70 years.
Author      Title/Abstract      

The Implications of Disinfection Byproduct Formation in the Selection of a Disinfection Strategy
Author: Carla De Las Casas, Fran Burlingham, Bob Witzgall, William Yu, Kurt Ohlinger, Rion Merlo, Shane Snyder, and Denny Parker
Date: 10/13
Preprint, WEFTEC 2013, Chicago, IL, Oct. 5-9, 2013

In order to meet future discharge limitations, the Sacramento Regional County Sanitation District must upgrade its wastewater treatment plant. Pilot facilities were operated as part of the Advanced Treatment Technology Pilot project. The project included a biological nitrogen removal (BNR) system, three filtration technologies (conventional granular media filter [GMF], a GMF with a preozonation step and a membrane filter) and three disinfection technologies (ultraviolet irradiation, ozone and chlorine). Chlorodibromomethane (CDBM) and dichlorobromomethane (DCBM) were monitored to evaluate if chlorine disinfection could meet discharge limitations. In addition, chloroform, bromoform, NDMA, bromate, haloacetic acids and aldehydes were monitored for all disinfectants. Both bench-scale and pilot-scale evaluations were conducted for each post-filtration disinfection technology. When compared with chloramination, free chlorine disinfection resulted in higher CDBM and DCBM, but lower NDMA concentrations. Ozone disinfection generated higher concentrations of bromate, NDMA and aldehydes. Overall, UV disinfection resulted in the lowest concentrations for all DBPs tested.

This library contains published materials for which copyrights may be owned by entities other than Brown and Caldwell, but which are stored for limited uses by BC employees. Technical papers authored by BC employees generally may be printed and shared electronically with clients and prospective clients outside BC. Technical papers cannot be sold, and technical papers shared outside BC must have proper attribution of the original sponsoring organization or conference where the paper was presented. This attribution is embedded in each technical paper file when it is loaded into this library. Published articles from magazines or trade journals which are stored in this library are FOR INTERNAL USE ONLY and SHOULD NOT be distributed to clients or others outside BC, without express permission of the copyright owner. For questions regarding copyrights associated with any document in this library, or questions regarding copyrights in general, contact the Legal Department.