Journal of The New England Water Works Association - Spring 2015 - (Page 2)

DAF Pilot Study for Algae and DBP Reduction  Qualifications Based Selection (QBS) Process to select an engineering firm to perform the design of the proposed buoyant media project. In reviewing the Request for Qualifications (RFQ) issued by NPU for the buoyant media conversion project, there were a number of concerns. The first concern was compliance with Stage 2 Disinfectant/Disinfection By-Products Rule (D/DBPR). A study of the Taftville/Occum service area of the Norwich system in August 2012 revealed that the Total Trihalomethane Formation Potential (TTHMFP) concentration in the treated water from the Stony Brook WTP was 177.2 micrograms per liter (ug/l). Although NPU had been in compliance with the Stage 1 D/DBPR to this point, the new Stage 2 D/DBPR was due to take effect for systems the size of NPU in 2013. Under Stage 2, compliance would no longer be measured by a system wide average of the running annual average of data collection points but rather would be measured by a locational running annual average of sample points likely to have the highest levels of disinfection byproducts. Monitoring for Stage 2 of the D/DBPR was set to begin in October 2013 for NPU. The ability of NPU to comply with these new rules was uncertain. Second, the preferred treatment for reducing disinfection by-products is enhanced coagulation. Even with a conversion to buoyant media, the increased solids loading onto the clarifiers caused by enhanced coagulation would result in shorter run times and reduced capacity. Third, the detention time through the existing treatment process was very short. The detention time from the static mixer to the entry point to the clarifiers at a flow rate of 2.5 mgd was only 20 to 26 seconds. At the design flow of 4.0 mgd, the detention time was only 12 to 16 seconds. This detention time is not sufficient for good floc formation which in turn will allow the clarifiers to perform properly. Additionally, the quality of mixing provided by a static mixer is not ideal, which exacerbates the problem of poor floc formation. The RFQ for the buoyant media project did not address these problems. Lastly, the total algae counts in 2010 approached 10,000 cells per milliliter. Although the green algae (Teilingia) has not recurred at similar levels, other algae such as Synedra and Tabellaria have been found as recently as 2013 at comparable high levels. The loading onto the 2 Journal NEWWA March 2015 clarifiers from a sustained algae bloom again resulted in shortened runs, increased spent washwater, and reduced capacity. The addition of rapid mixing, flocculation and dissolved air flotation (DAF) ahead of the existing Advent treatment units was proposed instead of the conversion of the non-buoyant media to buoyant media. By doing so, the water treatment plant could effectively reduce disinfection by-products (DBPs) through enhanced coagulation, improve the quality of floc formation by increasing coagulant detention time with better mixing, and address the increased clarifier loading caused by high algae levels. DAF has a demonstrated ability to handle high solids loads caused by enhanced coagulation or high algae counts without the clogging and shortened runs associated with media clarifiers. The budget for the conversion of the non-buoyant clarifier media to buoyant media was just over $1.8 million. It was estimated that the addition of package DAF treatment units ahead of the IDI Advent treatment units in a pre-engineered steel building addition, along with other improvements recommended in the RFQ, would be $3.0 million including engineering and a single season pilot study. There are at least three manufacturers of package DAF clarifiers with rapid mixing and flocculation: Infilco Degremont, Inc. of Richmond, VA, Leopold of Zelienople, PA and The Roberts Filter Group of Darby, PA. NPU filed a Project Rollover Update Form with DPH on January 30, 2013 to roll the project over into the next funding cycle as the selection of an engineering firm and completion of design could not be completed by June 30, 2013. Based on recommendations, NPU modified the project to eliminate the replacement of the non-buoyant media in the clarifiers with buoyant media and replace it with the addition of dissolved air flotation. Advanced Arrangements To the extent possible, arrangements for pilot testing equipment were made in advance of receiving authorization to proceed. An IDI DAF pilot treatment unit was moved on-site and the necessary influent, effluent and waste piping and electrical connections made within three weeks. NPU applied for a temporary discharge permit for the plant effluent, which was received prior to start-up of the pilot plant. Figure No. 1 shows the location and piping for the pilot plant.

Table of Contents for the Digital Edition of Journal of The New England Water Works Association - Spring 2015

Officers of the New England Water Works Association
NEWWA 2015 Meeting & Event Schedule
On the Cover
DAF Pilot Study for Algae and DBP Reduction
Impact of Epa Drinking Water Stage 2 Disinfectant and Disinfectant by-Product Rule
Thermal Expansion Causes False Fire Alarms
Preserving the Historical Beacon Hill Reservoir Granite Tablets
Water System Profile : Town of Kingston, Massachusetts
Proceedings: New England Water Works Association 2013-2014 Committee Reports
Obituary: Cheryl Lynn Maduskuie
In Memoriam: Richard G. Small
Reports From the Water Research Foundation
Guidelines for the Preparation of Papers for Publication in the Journal of the New England Water Works Association
Guidelines for the Peer Review Option of the Papers Appearing in the Journal of the New England Water Works Association
Entry Form: Newwa David M. Erickson Groundwater Award
Index to Advertisers

Journal of The New England Water Works Association - Spring 2015

Journal of The New England Water Works Association - Spring 2015 - (Page cover1)
Journal of The New England Water Works Association - Spring 2015 - (Page cover2)
Journal of The New England Water Works Association - Spring 2015 - (Page 1a)
Journal of The New England Water Works Association - Spring 2015 - (Page 2a)
Journal of The New England Water Works Association - Spring 2015 - Officers of the New England Water Works Association (Page 3a)
Journal of The New England Water Works Association - Spring 2015 - Officers of the New England Water Works Association (Page 4a)
Journal of The New England Water Works Association - Spring 2015 - Officers of the New England Water Works Association (Page 5a)
Journal of The New England Water Works Association - Spring 2015 - Officers of the New England Water Works Association (Page 6a)
Journal of The New England Water Works Association - Spring 2015 - NEWWA 2015 Meeting & Event Schedule (Page 7a)
Journal of The New England Water Works Association - Spring 2015 - NEWWA 2015 Meeting & Event Schedule (Page 8a)
Journal of The New England Water Works Association - Spring 2015 - On the Cover (Page 9a)
Journal of The New England Water Works Association - Spring 2015 - On the Cover (Page 10a)
Journal of The New England Water Works Association - Spring 2015 - On the Cover (Page 11a)
Journal of The New England Water Works Association - Spring 2015 - On the Cover (Page 12a)
Journal of The New England Water Works Association - Spring 2015 - On the Cover (Page 13a)
Journal of The New England Water Works Association - Spring 2015 - On the Cover (Page 14a)
Journal of The New England Water Works Association - Spring 2015 - On the Cover (Page 15a)
Journal of The New England Water Works Association - Spring 2015 - On the Cover (Page 16a)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 19)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 20)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 21)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 22)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 1)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 2)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 3)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 4)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 5)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 6)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 7)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 8)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 9)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 10)
Journal of The New England Water Works Association - Spring 2015 - DAF Pilot Study for Algae and DBP Reduction (Page 11)
Journal of The New England Water Works Association - Spring 2015 - Impact of Epa Drinking Water Stage 2 Disinfectant and Disinfectant by-Product Rule (Page 12)
Journal of The New England Water Works Association - Spring 2015 - Impact of Epa Drinking Water Stage 2 Disinfectant and Disinfectant by-Product Rule (Page 13)
Journal of The New England Water Works Association - Spring 2015 - Impact of Epa Drinking Water Stage 2 Disinfectant and Disinfectant by-Product Rule (Page 14)
Journal of The New England Water Works Association - Spring 2015 - Impact of Epa Drinking Water Stage 2 Disinfectant and Disinfectant by-Product Rule (Page 15)
Journal of The New England Water Works Association - Spring 2015 - Impact of Epa Drinking Water Stage 2 Disinfectant and Disinfectant by-Product Rule (Page 16)
Journal of The New England Water Works Association - Spring 2015 - Thermal Expansion Causes False Fire Alarms (Page 17)
Journal of The New England Water Works Association - Spring 2015 - Thermal Expansion Causes False Fire Alarms (Page 18)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 19)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 20)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 21)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 22)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 23)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 24)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 25)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 26)
Journal of The New England Water Works Association - Spring 2015 - Preserving the Historical Beacon Hill Reservoir Granite Tablets (Page 27)
Journal of The New England Water Works Association - Spring 2015 - Water System Profile : Town of Kingston, Massachusetts (Page 28)
Journal of The New England Water Works Association - Spring 2015 - Water System Profile : Town of Kingston, Massachusetts (Page 29)
Journal of The New England Water Works Association - Spring 2015 - Water System Profile : Town of Kingston, Massachusetts (Page 30)
Journal of The New England Water Works Association - Spring 2015 - Water System Profile : Town of Kingston, Massachusetts (Page 31)
Journal of The New England Water Works Association - Spring 2015 - Water System Profile : Town of Kingston, Massachusetts (Page 32)
Journal of The New England Water Works Association - Spring 2015 - Water System Profile : Town of Kingston, Massachusetts (Page 33)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 34)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 35)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 36)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 37)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 38)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 39)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 40)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 41)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 42)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 43)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 44)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 45)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 46)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 47)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 48)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 49)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 50)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 51)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 52)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 53)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 54)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 55)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 56)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 57)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 58)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 59)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 60)
Journal of The New England Water Works Association - Spring 2015 - Proceedings: New England Water Works Association 2013-2014 Committee Reports (Page 61)
Journal of The New England Water Works Association - Spring 2015 - Obituary: Cheryl Lynn Maduskuie (Page 62)
Journal of The New England Water Works Association - Spring 2015 - In Memoriam: Richard G. Small (Page 63)
Journal of The New England Water Works Association - Spring 2015 - Reports From the Water Research Foundation (Page 64)
Journal of The New England Water Works Association - Spring 2015 - Reports From the Water Research Foundation (Page 65)
Journal of The New England Water Works Association - Spring 2015 - Reports From the Water Research Foundation (Page 66)
Journal of The New England Water Works Association - Spring 2015 - Reports From the Water Research Foundation (Page 67)
Journal of The New England Water Works Association - Spring 2015 - Reports From the Water Research Foundation (Page 68)
Journal of The New England Water Works Association - Spring 2015 - Reports From the Water Research Foundation (Page 69)
Journal of The New England Water Works Association - Spring 2015 - Guidelines for the Preparation of Papers for Publication in the Journal of the New England Water Works Association (Page 70)
Journal of The New England Water Works Association - Spring 2015 - Guidelines for the Peer Review Option of the Papers Appearing in the Journal of the New England Water Works Association (Page 71)
Journal of The New England Water Works Association - Spring 2015 - Entry Form: Newwa David M. Erickson Groundwater Award (Page 72)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page 17a)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page 18a)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page 19a)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page 20a)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page 21a)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page 22a)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page 23a)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page 24a)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page cover3)
Journal of The New England Water Works Association - Spring 2015 - Index to Advertisers (Page cover4)
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