Water & Wastewater Treatment Equipment Serving San Francisco, CA
Precision lime slaking, biosolids stabilization, drying, storage, and truck loading systems engineered by RDP Technologies for San Francisco and Bay Area municipal facilities.
Trusted Process Equipment for San Francisco 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. San Francisco-area utilities count on RDP for clean, accurate, reliable systems that are simple and easy to maintain.
Biosolids Storage & Precision Truck Loading Systems
Bay Area wastewater agencies, from San Francisco’s Oceanside and Southeast plants through EBMUD across the bay and the regional facilities of San Jose and the Peninsula, share a common reality: limited site footprints, tight urban siting constraints, and significant daily biosolids volumes that demand dependable storage and loadout systems. RDP Technologies engineers biosolids storage systems and precision truck loading systems that automate the full flow from dewatering through to the departing truck without operator intervention at the loadout bay.
Moving floor technology built into live bottom bin storage keeps sticky sludge cake moving reliably, 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, San Francisco-area plant staff can redirect labor toward higher-value work elsewhere in the facility. For utilities running heavy weekday hauler rotations to Central Valley land application sites, that automation translates directly into reduced overtime, fewer overweight scale tickets, and smoother daily logistics.
Biosolids Lime Stabilization & Pasteurization Solutions in San Francisco, CA
California’s evolving biosolids regulations, combined with Bay Area cities setting their own beneficial reuse goals and several California counties restricting Class B land application within their borders, have pushed San Francisco and Peninsula utilities toward Class A treatment pathways with renewed urgency. RDP Technologies has been delivering EPA 503 compliant lime-based stabilization solutions since the federal rules were first established, supporting both Class A biosolids treatment and Class B biosolids stabilization at California facilities.
The EnVessel Pasteurization biosolids pasteurization system stands as 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 complete 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 San Francisco Bay Area facilities planning capital upgrades against tightening California biosolids regulations and expanding beneficial reuse mandates, these are regulator-recognized options with strong long-term track records.
Lime Slaking & Feed Systems for San Francisco Water Treatment Facilities
The San Francisco Public Utilities Commission Hetch Hetchy Regional Water System delivers water across the Bay Area from Sierra Nevada snowmelt, with treatment at the Sunol Valley and Harry Tracy facilities supporting pH stability and corrosion control through one of the country’s largest unfiltered surface water systems. Lime feed plays a critical role in maintaining distribution stability, and RDP Technologies designs lime slaking and feed systems engineered for the precision and reliability that high-volume Bay Area 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 operates as a hydrated lime feed system without any physical modifications, providing flexibility as lime market conditions shift across Northern California. 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 the Bay Area’s variable seasonal demand cycle.
Custom Engineering & Process Equipment Support Serving San Francisco
The Bay Area’s water and wastewater infrastructure spans some of the most regulatorily demanding jurisdictions in the country, with treatment facilities designed for seismic resilience, tidal-influenced site conditions, and the operational complexities that come with serving a dense, geographically constrained metro region. RDP Technologies brings over 45 years of custom process equipment engineering experience to capital projects across San Francisco, the Peninsula, and the broader Bay Area.
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 California State Water Resources Control Board, San Francisco Bay Regional Water Quality Control Board, and EPA Region 9 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. San Francisco-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 San Francisco Wastewater Plants
Bay Area wastewater plants face some of the longest biosolids hauling routes in the country, with material often trucked over the Altamont Pass to Central Valley land application sites or to permitted disposal facilities outside the immediate region. Biosolids drying systems become a strategic capital investment in this environment, dramatically reducing the tonnage moved per truckload and improving total disposal economics. 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 swings 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 California and the broader West. Pairing the dryer with upstream RDP lime feed or storage equipment gives San Francisco 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 San Francisco Project?
Connect with the RDP Technologies team to scope lime feed, biosolids, or drying equipment for your San Francisco-area facility. We’re ready to help.