AWWA MTC64600

The City of Pflugerville, Texas has built facilities to utilize a new water supply to meet the growing needs of its rapidly increasing population. For this project, an innovative application of membrane filtration with direct coagulation was chosen. The paper provides a process flow diagram and lists the treatment plant's components. The testing of the completed membrane system began in February 2006. The startup of the Plant began in March 2006. The City has been learning to operate the membrane plant since they had no prior experience (the City's supply was groundwater before). The City has not been experimenting to find the optimum coagulant dose for organic removal. However, the organic removals since startup range from 22% to 57% with an average of 36%. These removal levels are near those found during piloting of the membranes (41% plus). The filtrate turbidity is very good with a range of 0.02 to 0.08 NTU. As demonstrated by the pilot study and full-scale operation, the generally accepted coagulant contact time of 10 to 30 minutes prior to the membrane system is not needed for the City of Pflugerville's new surface water treatment plant. The coagulant contact time can be substantially reduced and still meet the required treated water quality goals in accordance with the Texas Commission on Environmental Quality Rules and Regulations. By testing an innovative application of membrane filtration with direct coagulation, the city of Pflugerville was able to meet its project budgetary constraints, as well as construct a treatment plant that will meet the consumer demand and regulatory pressure for better drinking water quality today and in the future. Includes table.

Product Details

Edition:

Vol. - No.

Published:

03/01/2007

Number of Pages:

2

File Size:

1 file , 460 KB