Conference Agenda

A stormwater maintenance frequency assessment of a high-rate filter was conducted in a street located in King County Washington from September 2020 to January 2022 (Herrera, 2022). The system had a routine maintenance event followed by hydraulic and sample collection to determine maintenance frequency. The presentation will discuss the study site, sample methods, results and conclusions from the investigation. I will also have an open discussion on visual inspection cues for determining maintenance with horizontal treatment systems associated with road sanding events.

Wireless level and flow monitoring solutions for managing stormwater and combined sewer systems, and near real-time alerting of utilities and consultants of high levels and/or pending CSOs. Data delivered wirelessly to ADS' PRISM web-based software can used for monitoring level only or quantifying flow for purposes of event notification, overflow reporting and overall stormwater management purposes including model development and/or calibration.

Formed in Helena, MT in 1993 the company began installing Cured-in-Place Manhole (CIPM) lining systems in 1997. We have extensive experience with unique and diverse situations, including but not limited to manholes, square structures, deep wetwells and lift stations, culverts, remote installations, and heavy infiltration and deterioration problems. Cured-in-place liners can often be the most practical solution both cost-wise and length of installation time and is almost always the most permanent method. They stop infiltration and provide structural integrity. The multiple layers of fiberglass provide needed structural integrity and the PVC membrane acts as a barrier to H2S gas. It can usually be installed without bypass pumping and in a matter of a few hours. The entire interior of the structure receives coverage. CIP’s intelligently-designed process fortifies existing infrastructure and is certified to last up to 100 years, unrivaled by any product in the marketplace.

This presentation will review how variable frequency drive use on varying demand loads can reduce energy and CO2 levels. A demonstration on intelligent drives controlling two pieces of rotating equipment will be shown. Specific pump application features such as condition based monitoring for predictive maintenance and de-ragging will be discussed.

Corrosion and odors are a constant challenge for many wastewater treatment systems. Sewer collections systems, manholes, wet wells and wastewater treatment plant headworks are some common problem areas. Hydrogen Sulfide (H2S) is the offending gas that causes pipe and infrastructure degradation, odors, and safety concerns. There are many ways to deal with Hydrogen sulfide from odor scrubbing systems to a host of chemical treatments.

The challenge is to know where the odors are formed, how much chemical to add, and how efficient removal is due to the highly volatile nature of H2S. Traditional treatments rely on very difficult lab testing or inconsistently representative air testing. In-situ, real-time liquid phase H2S monitoring turns out to be a more accurate and predictive measurement as we’ll discuss some real-world data and application of an innovative measurement technology principal.

Wastewater treatment plants are facing a challenging future, trying to meet challenges including odor, reducing greenhouse gas emissions, potential PFAS regulations, and rising capital and operating cost. It is possible to design and operate a facility that meets these challenges by following some simple rules for facility design including:
• Provide significant reduction in biosolids volume.
• Produce energy from the biosolids process to provide surplus energy to run the facility.
• Reduce offensive odors during processing and recycling of the treated solids.
• Allow for flexibility in the treated solids for recycling and reuse.
Thermal Hydrolysis systems are achieving all of these objectives at facilities across North America. The design and results of several facilities will be reviewed and presented.

The inDENSE gravitational sludge intensification technology offering from WWW offers several biological advantages to achieving process control, improved SVI’s, clarifier capacity, enhanced BNR, and granular sludge intensification. This technology is extremely retrofittable to almost any secondary process and is viewed as the least cost per gallon of any sludge intensification offering in the market.

Anaergia’s Omnivore High solids digestion system is comprised of (1) Anaergia high solids OmniMix mixers (with service box) and (2) Anaergia sludge screw thickener, to remove excess water from digester, increase organics loading, and improve VSR. As retrofit, Omnivore triples digester capacity within existing volume, or as new construction, requires 1/3 the footprint and significantly reduces CAPEX.

Traditional Anaerobic Digestion processes can create undesirable challenges at WWRFs. Nitrogen recycle from dewatering can have a significant impact on the overall loading to the facility and Phosphorus released under anaerobic conditions can negatively impact dewatering performance. These problems increase chemical and energy costs and create many operational challenges.
By adding an Acid Phase Digester before and an Aerobic Reactor after the Anaerobic Digester, some significant improvements in plant, digester and dewatering performance can be realized. These proven processes are well- established and employed (often independently) at several facilities but, when they are used in concert with the addition of a recycle loop, the solids process effectively becomes sidestream nutrient removal. Managing these nutrients in solids processes that are optimized for the desired biology has other side-effects including decreased H2S production, reduced odor and more robust digester performance.

The V-Bank System for carbon vessels have been around a long time, but airflows in projects are rising as projects become more ambitious. The V-Bank system is the most efficient system for maximizing airflows, footprint and ease of change out.

Bar Screens are often thought of as an inefficient means of screenings removal. However, spending a bit of time design optimizing the channel configuration can go a long ways to removing pesky items in the waste stream like wipes.

This course will cover the basics of Membrane Bioreactor (MBR) process including how to design, operate and troubleshoot. MBR effluent meets the class A recycled water and are reused in multiple application around the world. It also meets extremely low Nitrogen and Phosphorus regulations, which makes the MBR technology a viable option in multiple applications.
Kubota will provide couple detailed MBR project case studies in the Northwest.

AWC has nearly 25 active DAF plants in the PNW. The technology has been so prolific here because it is perfect for treating the kinds of surface waters we have, which are laden with fine solids, organics and algae. Few other technologies can meet potable water quality requirements with such high recovery, low operating costs and as little waste. This presentation will dive into the details of the DAF's performance at these many operating facilities and will highlight an active project in Wrangell, Ak where a DAF plant is finally being built nearly 7 years after piloting confirmed DAF was the best technology for the job.

The Revolving Algal Biofilm (RAB) system uses vertically oriented conveyor belts that grow algae on their surface. As the algae grow, it consumes nitrogen and phosphorus from the wastewater while it uses sunlight and carbon dioxide from the atmosphere to rapidly grow algae biomass.

The algae produced during this process can be harvested and used to make fertilizers, bioplastics, and biofuels providing an additional revenue stream alongside an already more economical system.

The City of Pasco, WA is currently implementing the RAB system at its Process Water Reuse Facility following anaerobic digestion.

Veolia's ZeeLung MABR technology allows existing facilities the ability to increase or even add nitrification if the facility does not already nitrify in a simple and cost-effective manner.

On-site hypochlorite generation (OSHG) systems for disinfection have seen an increased adoption rate in the last decade as water and wastewater utilities continue to grapple with the onerous complexity of risk management plans (RMPs) in the case of gas chlorine disinfection and the operational or cost challenges of using bulk 12.5% sodium hypochlorite for disinfection. OSHG systems which have been utilized in North America since the early 1990’s use electricity to convert simple table salt (sodium chloride) into 0.8% (8,000 ppm) bleach or sodium hypochlorite.

Floating thick mats of scum and grease combined with the increased presence of wet wipes has made lift station maintenance a costly line item. Many manhours are spent by personnel busting scum layers just to gain access to duty pumps. A simple pump modification added to wet wells in four different cities resulted in the total elimination of scum mats and significantly reduced the frequency of pump clogging. This short booth presentation will present the simple modification implemented.

KSB’S patented Amarex ARX submersible pump with D-max technology was specifically developed for reliable operation and high efficiency, even when faced with the challenge of processing modern day ‘flushable materials’, and difficult contents such as long, fibrous materials, heavy solid concentrations, and other materials found in today’s municipal and industrial waste streams

Highly efficient compressed gas mixing technology for optimized biological treatment, nutrient removal and tank/channel mixing that reduces energy consumption, simplifies maintenance, and optimizes process conditions, enabling highly scalable and flexible operations.