Water & Wastewater Treatment Equipment Serving Portland, OR
Precision lime slaking, biosolids stabilization, drying, storage, and truck loading systems engineered by RDP Technologies for Portland and Willamette Valley municipal facilities.
Trusted Process Equipment for Portland Water & Wastewater Plants
For over 45 years, RDP Technologies has been building robust equipment, backed by dependable process performance, based upon a foundation of practical technologies that simply perform. Portland-area utilities count on RDP for clean, accurate, reliable systems that are simple and easy to maintain.
Biosolids Storage & Precision Truck Loading Systems
Portland’s Bureau of Environmental Services operates the Columbia Boulevard Wastewater Treatment Plant and the Tryon Creek Wastewater Treatment Plant, with regional partners including Clean Water Services in Washington County managing additional capacity across the Portland metro region. These facilities produce substantial daily biosolids volumes that move through long-running Pacific Northwest beneficial reuse programs to agricultural land application sites in Eastern Oregon and across the broader region. Dependable storage and loadout equipment is essential to maintaining steady program performance across the area’s wet season and dry summer months. RDP Technologies engineers biosolids storage systems and precision truck loading systems that automate the full flow from dewatering through to the departing truck.
Moving floor technology built into live bottom bin storage keeps sticky sludge cake flowing reliably through the Pacific Northwest’s prolonged wet, cool operating season, eliminating the bridging and rat-holing common to conventional steep-walled hoppers. Sludge cake truck loading runs automatically through the precision truck loading system, with most loads completed within minutes and held to within a couple hundred pounds of the operator’s target weight.
Three decades and approximately three hundred biosolids conveying equipment installations have refined a layout that keeps trucks clean, departure times predictable, and operator involvement minimal at the bay. Because the cycle runs without continuous attendance, Portland-area plant staff can redirect labor toward higher-value work elsewhere in the facility. For utilities running long-distance hauler rotations to Eastern Oregon land application sites, that automation directly improves daily throughput and reduces overtime costs.
Biosolids Lime Stabilization & Pasteurization Solutions in Portland, OR
Oregon has a longstanding tradition of strong biosolids beneficial reuse, with Oregon DEQ providing detailed regulatory oversight under federal EPA 503 standards and additional state-specific protections for soil, surface water, and groundwater. Portland-area utilities have been national leaders in beneficial reuse for decades, and current capital planning increasingly considers Class A pathways for the broader market flexibility they unlock. RDP Technologies has been delivering EPA 503 compliant lime-based solutions since the federal rules were first established, supporting both Class A biosolids treatment and Class B biosolids stabilization at facilities across the Pacific Northwest.
The EnVessel Pasteurization biosolids pasteurization system is one of the most widely deployed Class A processes nationally, with more than 70 installations operating across the United States. EnVessel pairs lime addition with controlled supplemental heat instead of relying on heavy lime overdosing, keeping chemical demand reasonable while reliably hitting the time, temperature, and pH thresholds required for full pathogen kill.
Enhanced Pasteurization moves the cycle into a sealed sequencing batch reactor where lime drives pH above 12 and controlled heating completes disinfection. Both pathways serve as proven wastewater pathogen reduction equipment, supported by published case studies and decades of operational data from municipalities nationwide. For Portland-area facilities planning capital upgrades against Oregon DEQ oversight and the region’s emerging PFAS and biosolids monitoring considerations, these are regulator-recognized options with strong long-term track records.
Lime Slaking & Feed Systems for Portland Water Treatment Facilities
Portland Water Bureau draws drinking water primarily from the Bull Run watershed in the Mt. Hood National Forest, supplementing with the Columbia South Shore Well Field during peak demand and emergencies. The naturally soft Bull Run source water requires careful pH adjustment and corrosion control to maintain distribution stability, and the new Bull Run Filtration Facility currently under construction will add further treatment capacity for the Portland metro region. Lime feed plays a central role across these operations, and RDP Technologies designs lime slaking and feed systems engineered for the precision and reliability that Pacific Northwest municipal operations require year-round.
The Tekkem family of lime slakers for water treatment applies load cell technology to combine a measured weight of quicklime with a measured weight of water, holding the slaking reaction within the proven 180°F to 190°F temperature window. This weight-based control approach enables precision lime dosing systems with slurry concentration adjustable from one percent up to thirty percent based on plant requirements.
The same Tekkem platform converts to operate as a hydrated lime feed system without any physical modifications, providing flexibility as lime market conditions shift across the Pacific Northwest. A continuous slurry delivery loop combined with pinch valve and flow meter dosing supports accurate feed at multiple application points within a facility. With only one moving part inside the reaction tank, maintenance demands stay infrequent and predictable for plants running around the clock through Oregon’s variable seasonal demand cycle.
Custom Engineering & Process Equipment Support Serving Portland
Water and wastewater infrastructure across the Portland metro region balances stringent environmental protections, seismic resilience requirements driven by Cascadia Subduction Zone planning, and the operational demands of a metro area that has grown steadily across the Willamette Valley. RDP Technologies brings over 45 years of custom process equipment engineering experience to capital projects across Multnomah, Washington, Clackamas, and Clark counties.
As a wastewater treatment equipment manufacturer that handles design, fabrication, and controls programming under one roof, we adapt to existing tankage, constrained urban site footprints, and operator workflows rather than forcing a generic package into a difficult location. Our intelligent control platforms integrate cleanly with SCADA systems and meet the detailed reporting expectations of Oregon Department of Environmental Quality, regional clean water programs, and EPA Region 10 oversight.
We engage directly with municipal engineers, consulting firms, and plant operations staff from early scoping through commissioning and long-term technical support. Robust equipment, dependable process performance, and practical technologies that simply perform are the principles that have guided every project we deliver. Portland-area facilities benefit from working with a single accountable manufacturer that designs, builds, and stands behind the equipment for the long haul.
Biosolids Drying Systems for Portland Wastewater Plants
Hauling Portland-area biosolids over the Cascade Range to Eastern Oregon land application sites covers significant distance, making biosolids drying systems an attractive long-term capital investment for reducing both tonnage moved and disposal costs over a multi-decade operating horizon. The RDP-Fenton wastewater sludge dryer operates on a repeating batch cycle that allows drying time to be adjusted to match the natural variation in sludge cake solids concentration coming off the dewatering line.
Batch sludge drying equipment handles those upstream variations cleanly, whereas continuous-flow dryers often struggle when feed quality shifts unexpectedly. Operators in the field have repeatedly noted how little daily attention the system requires once a stable recipe is dialed in.
The dried product comes out significantly reduced in volume and weight, lowering trucking costs and opening pathways into fertilizer, soil amendment, and energy recovery markets across Oregon, Washington, and the broader Pacific Northwest. Pairing the dryer with upstream RDP lime feed or storage equipment gives Portland wastewater plants a fully integrated biosolids handling line backed by a single manufacturer with consistent controls and ongoing support. Long service life and ease of operation were the design priorities from the start, and that focus shows up clearly in real-world performance data from installed sites across the country.
Ready to Discuss Your Portland Project?
Connect with the RDP Technologies team to scope lime feed, biosolids, or drying equipment for your Portland-area facility. We’re ready to help.