Chang, Jennifer

Jennifer Chang is an engineer with Jacobs Engineering, working in water and wastewater planning and design for the past 19 years.

Titles from this speaker

Description: Meeting Stringent Ammonia and Disinfection Byproducts Limits Using Preformed...

Meeting Stringent Ammonia and Disinfection Byproducts Limits Using Preformed Monochloramine Disinfection

Abstract

The Rock Creek Advanced Wastewater Treatment Facility must balance low effluent ammonia and disinfection requirements to meet NPDES permit limits. Two trihalomethane disinfection byproducts (DBPs) - bromodichloromethane and chlorodibromomethane – have been identified for potential further regulatory limits. Preformed monochloramines (PFM) were evaluated for meeting disinfection and DBP limits, while managing ammonia restrictions. PFM are formed by mixing ammonia and sodium hypochlorite in carrier water prior to mixing with process water, reducing the opportunity for DBP formation. Because added ammonia utilized for contributes to bulk effluent ammonia load, extensive bench and pilot-scale testing was conducted to determine if utilizing PFM disinfection could be an effective solution. Testing demonstrated the benefits of using PFM over both free chlorine and in situ monochloramine by meeting disinfection limits, significantly reducing DBP formation potential, and maintaining effluent ammonia concentrations below permit limits. These results show the viability of PFM disinfection to meet DBP limits, even with a restrictive ammonia permit.

SpeakerChang, Jennifer

Presentation time

08:50:00

09:10:00

Session time

08:30:00

09:50:00

SessionDisinfection on The Edge

Session number313

TopicDisinfection and Public Health, Research and Innovation, Water Reuse and Reclamation

Author(s)

J. ChangR. GoldaP. SchauerM. NoesenL. Schimmoller