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August 17, 1-2 p.m.
Alternatives and Optimization Strategies for Sedimentation Basin Sludge Collection Henry Ricca, Hazen and Sawyer Approved for 1.0 credit hour for Water, Wastewater, and PE Webinar Description: Sedimentation basin sludge collection plays an important role in the performance of water treatment plant process trains and residual trains. The benefits of optimized sedimentation basin sludge collection include control over sludge blanket depth, reduced floc carryover to downstream processes, and optimization of residuals handling processes. The sludge collection technologies that are most common in sedimentation basin applications include scraper systems, hosed travelling suction headers, and hoseless travelling suction headers. Raleigh Water installed a hoseless travelling suction header sludge collection system in one of the five sedimentation basins at the E.M. Johnson WTP in 2018. Currently, this same technology is being installed in the remaining four basins as part of an ongoing construction project. Raleigh Water has worked to optimize the installed sludge collection system. This presentation will discuss: Design features of more common sludge collection technologies on the market for sedimentation basin applications. The theory of operation and the flexibility to modify operation to align with the varying sludge production at WTPs based on flow, raw turbidity, and chemical feed doses will be discussed. A case study of Raleigh Water efforts to optimize sludge collection performance through: - Implementing a monitoring program for sludge blanket levels across the sedimentation basin, including a transition from manual to online readings
- Optimizing hoseless travelling suction header operation to limit sludge accumulation that may result in sludge becoming anoxic and affecting settled water quality.
- Optimizing suction header travel speed and travel distance to ensure adequate removal at the locations where solids were prone to settling.
- Adjusting suction header operations to optimize the percent solids concentration and volume of the sludge removed from the sedimentation basin to avoid overloading downstream residuals handling processes
- Operations data from the sludge collection system at the E.M. Johnson WTP will be presented along with Raleigh Water optimization efforts. Through routine monitoring of sludge blanket levels, Raleigh Water has been able to correlate water quality and WTP production to sludge production and develop strategies to adjust sludge collection operations accordingly. Raleigh Water has been able to optimize their treatment process by reducing floc carryover and preventing sludge from becoming anoxic. By monitoring the solids concentration of the residuals stream from the sedimentation basins, Raleigh Water has been able to control residuals volumes and limit hydraulic over-loading of the gravity thickeners. In addition, qualitative performance of sludge collection systems at other WTPs will be discussed.
Pricing: - Cost is $30 per attendee.
Webinar Information and Requirements: Webinar Technical Requirements - NC One Water will provide each attendee with the link to access the webinar and call-in audio instructions. NC One Water is not responsible for technical support before, during or after the webinar.
- Attendees must ensure that they have the needed equipment, that it is functioning, that it is compatible with the webinar system and that they know how to use it.
- Refunds will be handled according to NC One Water’s current seminar refund policy and will not be issued for attendees that experience technical or equipment failures during the webinar.
- NC One Water webinars are conducted using Zoom. It is highly recommended that you test your computers compatibility before planning to attend a webinar. How-to videos and additional Zoom resources can be found here: https://learn-zoom.us/show-me.
- To participate in the webinar, you must have access to a computer with an internet connection AND an audio connection (phone line or VOIP connection). It is recommended that you participate from a semi-private, quite location where there will be few distractions.
Webinar Continuing Education Units Requirements - Attendees must be on camera at all times during the presentation. Visibility and participation will be monitored. Failure to participate and be visible will result in no CEUs being given.
- Attendees must pre-register and provide a valid certification numbers issued by the NCWPCSOCC, NCWTFOB or NC Professional Engineers.
- Attendees must be logged in at the beginning and must remain logged in through the end of the session. Attendees must promptly respond to brief quizzes that appear randomly throughout the webinar.
- Each attendee must be logged into a separate computer so that their participation may be accurately tracked.
- No partial credit will be given.
- After the webinar, NC One Water staff will email CEU documentation/certificates to attendees meeting the CEU requirements. Reports will also be sent to the appropriate certification boards.
- NC One Water will report all cases of fraudulent attendance to the appropriate licensing boards.
- Inability to complete CEU requirements due to technical difficulties will result in no CEU’s being issued.
Contact Hours: - Wastewater Operators: This seminar is approved by the WPCSOCC for 1 contact hour for continuing education. WPCSOCC Course ID: CE06072307.
- Water Treatment Facility Operators, Distribution Operators, Cross Connection/Backflow Operators: This seminar is approved for 1 contact hour for continuing education by the NCWTFOCB. Course ID: 230131.
- Professional Engineers: This course is approved for 1 PDH.
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