Dyson, John

John holds a B.S. degree in Chemistry from Longwood College. He has experience working with many treatment technologies in both water and wastewater facilities.. Over the 30+ years, worked on many projects varying in size from 0.1 MGD to 600+ MGD. In addition, he has been involve in the introduction of several new technologies through his career.

Titles from this speaker

Description: Domestic Advanced Primary Wastewater Treatment Utilizing Pile Coth Media Filtration...

Domestic Advanced Primary Wastewater Treatment Utilizing Pile Coth Media Filtration for Operational Savings and Increased Biogas Production and Wet Weather Treatment

Abstract

The use of pile cloth media filtration (PCMF) is becoming a new solution to allow treatment facilities to achieve advanced treatment without chemical addition in a dramatically reduced footprint in comparison to conventional primary sedimentation. PCMF brings a high-quality effluent quality which allows the technology to be used, also for the wet weather treatment in dual treatment applications. The study and full-scale installation data has confirmed that PCMF can achieve consistently >80% TSS and >50% BOD/COD removal in primary applications. The has been much testing in documenting the benefits of advanced primary treatment with PCMF. This includes the reduction in aeration requirement for the biological treatment processes and/or more biological treatment capacity without additional basins/tankage. Other benefits such as more primary solids for anaerobic digestion and increased biogas and energy production within the wastewater facility. In wet weather applications, the technology is producing effluent quality that achieves EPA secondary effluent standards or better.

This paper will cover advanced primary treatment utilizing pile cloth media filtration versus conventional treatment. The concept and principles of carbon diversion and how the use of pile cloth media filtration allows WRRF's become more energy efficient and production of biogas. Also, the paper covers the ability to handle wet weather peak flow conditions by providing dual treatment capabilities.

SpeakerDyson, John

Presentation time

14:00:00

14:30:00

Session time

13:30:00

15:00:00

SessionPrimary Treatment Technologies: Should We Settle for Conventional Primary Sedimentation?

Session locationRoom S501a - Level 5

TopicEnergy Production, Conservation, and Management, Facility Operations and Maintenance, Intermediate Level, Municipal Wastewater Treatment Design

Author(s)

Dyson, John

Author(s)J. Dyson 1; T. Reid 2 ; O. Caliskaner 3; J. Dyson 1;

Author affiliation(s)Aqua-Aerobic Systems, Inc. 1; Aqua-Aerobic Systems, Inc. 2 ; Caliskaner Water Technologies 3; Aqua-Aerobic Systems 1;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159003

Volume / Issue

Content sourceWEFTEC

Word count22

Piloting Primary Filtration: Impacts on Removals, Secondary Loading, and Disinfection

Abstract

The Water Pollution Control Authority (WPCA), City of Bridgeport, Connecticut is in the process of upgrading their West Side Wastewater Treatment Plant (WWTP). The 2020 Wastewater Facilities Plan completed by the WPCA and CDM Smith recommended increasing the WWTP's wet weather peak flow capacity from 340 ML/d (90 mgd) to 757 ML/d (200 mgd). This increase was recommended to enable treatment of wet weather flows that reach the plant and cost-effectively reduce overall untreated CSO volumes upstream in the collection system. Due to the tight footprint of the site, construction of traditional primary settling tanks was not feasible. Advanced dual-use primary filtration technologies were investigated in the Facilities Plan and recommended for full-scale implementation. Primary filtration offers a substantial space savings and due to superior removal efficiency, have an added benefit of reducing the load on the biological treatment system. To evaluate and select a primary technology for the West Side WWTP upgrade, an onsite side-by-side pilot study of two technologies was completed from March to May 2023. CDM Smith and WPCA identified Aqua Aerobic Systems' (AASI) AquaPrime cloth media filtration and Tomorrow Water's (TW) Proteus upflow media filtration as two promising technologies for full-scale implementation. The AquaPrime system consists of pile cloth media filter disks with an inside out flow path, and the Proteus system consists of a layer of expanded cross-shaped polypropylene media. Both vendors provided trailer mounted units for the pilot study, shown in Figure 1 and Figure 2. During the pilot study, screened primary influent flow from the West Side WWTP served as the influent to both pilot units. Various influent and effluent parameters including TSS, BOD, COD, NH3-N, TKN, TP, Turbidity, and UVT were assessed to evaluate the treatment performance of both units. Collimated beam testing and bacteria counts were also completed to determine the suitability of the effluent for ultraviolet (UV) disinfection. Operational parameters, such as backwash frequencies, backwash volumes, backwash settleability, along with fats, oils and grease (FOG) and solids generation were also monitored throughout the study. Both pilot units were tested under a range of hydraulic loads, representative of anticipated full scale operating conditions. The hydraulic loading rates for each pilot unit are presented in Table 1. Additionally, the pilot study captured two significant wet weather events, and at times, additional solids were used to artificially increase solids loading, simulating a 'first flush' condition. TSS and BOD Removal The two piloted primary filtration technologies met expectations for both TSS and BOD removal. During ambient conditions across all flow conditions, AquaPrime averaged 81% TSS removal and Proteus averaged 71% removal. Ambient was defined as incoming screened primary flow without the addition of spiked solids. For BOD removal during ambient conditions, AquaPrime averaged 64% removal and Proteus averaged 53% removal. The influent and effluent data are reported in Table 1 and Table 2 in the following format: Median value (min. value — max. value) [Number of values] Figure 3 and Figure 4 depict the primary influent and pilot effluent conditions in a graphical format. Generally, AquaPrime's TSS removal effectiveness remained constant between the lowest and highest hydraulic loading rates, while Proteus saw a decline in removal from the highest to lowest rates of about 15%, as expected. Hydraulic loading rate had little to no impact on BOD removal effectiveness for both pilot systems. Backwash and Solids Waste Production For both systems, as hydraulic and solids loading rate increased, both the backwash frequency and volumes increased. The study defined an efficiency parameter to measure the impact of backwash volumes on process efficiency. AquaPrime demonstrated consistent efficiency, ranging from 70 to 100%, with most trials between 90 and 100%. Proteus efficiency generally decreased with increased hydraulic loading rates, ranging from 68 to 85%. The backwash from both AquaPrime and Proteus was observed to be much thinner than primary sludge from traditional settling tanks, averaging 1400 mg/L and 700 mg/L during ambient conditions respectively. Disinfection Effectiveness The facilities plan recommended dual-use advanced primary filtration, with primary effluent flows beyond the secondary capacity of the plant (wet weather bypass) receiving UV disinfection prior to discharge. Collimated beam testing for UV disinfection effectiveness revealed that UV could not reliably inactivate enterococci in the primary filter effluent for both AquaPrime and Proteus to the WWTPs permit limits. This was true for both primary effluent, as well as primary effluent that was 'blended' with secondary effluent from the WWTP to match a real-world condition. These enterococci results can be compared to the West Side WWTP's instantaneous and monthly geomean permit limits in Figure 5 and Figure 6. AquaPrime effluent is shown, but Proteus produced comparable results. Subsequent dose testing with hypochlorite disinfection proved successful, meeting all WWTP permit limits within 30 minutes. These results can be seen for AquaPrime in Figure 7. Overall, this hypochlorite disinfection was successful for both AquaPrime and Proteus.

The performance of two primary filtration technologies was evaluated in a side-by-side pilot study in Bridgeport, CT. Aqua-Aerobic Systems' AquaPrime cloth media filtration and Tomorrow Water's Proteus upflow media filtration were evaluated based on various water quality parameters. Both systems achieved high solids and BOD removal over the piloting period. However, UV collimated beam testing revealed complications meeting the WWTP's bacteria limits at reasonable UV doses for both systems.

SpeakerThompson, Daniel

Presentation time

11:30:00

12:00:00

Session time

10:30:00

12:00:00

SessionThree Different Flavors of Improvement for Preliminary/Primary Treatment

Session number522

Session locationRoom 349

TopicFacility Operations and Maintenance, Intermediate Level, Municipal Wastewater Treatment Design

Author(s)

Thompson, Daniel, McBennett Mappa, Lauren, Kaldate, Amit, Dyson, John

Author(s)D. Thompson1, L. McBennett Mappa2, A. Kaldate3, J.D. Dyson4

Author affiliation(s)1CDM Smith, CT, 2WPCA, City of Bridgeport, CT, 3Tomorrow Water, VA, 4Aqua-Aerobic Systems, Inc., VA

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2024

DOI10.2175/193864718825159601

Volume / Issue

Content sourceWEFTEC

Word count11

Description: Two Years Operating World's Largest Capacity Facility of Latest Generation...

Two Years Operating World's Largest Capacity Facility of Latest Generation Wet-weather Disk Filters

Abstract

The recently expanded and upgraded Tomahawk Creek WWTF continues JCW’s success eliminating wet-weather overflows and complying with new nutrient limits. After comprehensive evaluations of source control, equalization, conveyance, and treatment alternatives, JCW implemented an auxiliary treatment strategy with dual-purpose filters as the most resilient, sustainable, and cost-effective alternative. This strategy initially saved JCW $200M in construction costs compared to storage and equalization alternatives. Design collaboration with a construction manager at risk (CMAR) saved another $40M in construction costs through value engineering studies at the 60% design stage that optimized site usage and technologies for auxiliary treatment and biological nutrient removal. The renewed WWTF started operating dualpurpose pile cloth disk filters in 2021 for tertiary treatment of flows up to 216 ML/d (57 mgd) and auxiliary treatment of wet-weather flows up to 435 ML/d (115 mgd) for a total peak flow capacity of 651 ML/d (172 mgd).

Renewal of the Tomahawk Creek Wastewater Treatment Facility is a major milestone in Johnson County Wastewater's Integrated Plan to identify, assess, and prioritize infrastructure initiatives and investments. Among its innovations, the updated facility uses an auxiliary treatment strategy with dual-purpose pile cloth disk filters that polishes effluent and cost-effectively treats peak wet-weather flows up to 651 ML/d (172 mgd) for year-round benefits to local streamways.

SpeakerFitzpatrick, James

Presentation time

16:00:00

16:30:00

Session time

15:30:00

17:00:00

SessionThinking Outside the Basin: Auxiliary Wet Weather Treatment

Session locationRoom S504a - Level 5

TopicIntermediate Level, Municipal Wastewater Treatment Design, Wet Weather

Author(s)

Fitzpatrick, Jim

Author(s)J. Fitzpatrick 1; A. Szerwinski 2 ; J. Dyson 3; G. Miller 4; A. Ruther 5; N. White 6; A. Szerwinski 2; J. Fitzpatrick 1;

Author affiliation(s)Black & Veatch 1; Johnson County Wastewater 2 ; Aqua-Aerobics 3; Black & Veatch 4; Black & Veatch 5; Black & Veatch 6; Johnson County Wastewater 2; Black & Veatch 1;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159050

Volume / Issue

Content sourceWEFTEC

Word count14