Tag: process
Introduction In the municipal water and wastewater sector, the “dry pit” is a misnomer that frequently leads to expensive equipment failures. While designed to separate mechanical and electrical equipment from the wet well, dry pits and valve vaults are notoriously hostile environments—characterized by high humidity, potential for accidental flooding, corrosive hydrogen sulfide gases, and confined […]
Facility Profile: The authoritative technical resource for engineers, operators, and industry professionals regarding the Durham AWTF in Tigard, Oregon. FACILITY BASIC INFORMATION Plant Name: Durham Advanced Wastewater Treatment Facility Location: 16060 SW 85th Ave, Tigard, Washington County, Oregon Operating Authority: Clean Water Services (CWS) Design Capacity (Dry Weather): 25.7 MGD Peak Hydraulic Capacity: 113 MGD […]
Also serving the Clark Regional Wastewater District (Bi-Jurisdictional Service Area) FACILITY BASIC INFORMATION Plant Name: Westside Wastewater Treatment Plant Location: 2323 W Mill Plain Blvd, Vancouver, Clark County, WA 98660 Operating Authority: City of Vancouver Public Works Design Capacity (Max Month): 28.3 MGD Peak Hydraulic Capacity: ~60 MGD Current Average Flow: ~21-24 MGD Population Served: […]
Location: Spokane, Washington | Operating Authority: City of Spokane Wastewater Management Department 1. INTRODUCTION The Riverside Park Water Reclamation Facility (RPWRF) serves as the cornerstone of wastewater infrastructure for the Inland Northwest. Located on the banks of the Spokane River, this facility is the largest advanced wastewater treatment plant in Eastern Washington, with a design […]
1. INTRODUCTION In the hierarchy of unit processes within municipal and industrial wastewater treatment facilities, solids conveyance systems often receive less design scrutiny than liquid stream biological processes. However, the mechanical transport of dewatered biosolids, screenings, and grit represents one of the most mechanically intensive and maintenance-critical operations in a treatment plant. The failure of […]
FACILITY BASIC INFORMATION Plant Name: South Treatment Plant (South Plant) Location: Renton, King County, Washington Operating Authority: King County Wastewater Treatment Division (WTD) Design Capacity (AWWF): 115 MGD (Average Wet Weather Flow) Peak Hydraulic Capacity: 325 MGD Current Average Flow: ~90 MGD (Combined Annual Average) Population Served: Approx. 800,000 residents Service Area: South and East […]
FACILITY BASIC INFORMATION Plant Name: West Point Treatment Plant Location: 1400 Discovery Park Blvd, Seattle, King County, WA 98199 Operating Authority: King County Wastewater Treatment Division (WTD) Design Capacity: 133 MGD (Average Wet Weather), 440 MGD (Peak Hydraulic) Current Average Flow: ~90 MGD (Dry Weather) Population Served: Approx. 1.8 million (Regional System Total) Service Area: […]
Introduction In municipal and industrial water treatment, the reliability of process analytics—pH, conductivity, dissolved oxygen, and turbidity—often hinges not on the sensor electronics, but on the mechanical interface with the process stream. A surprising 25% of premature sensor failures in wastewater applications are attributed to improper mounting, poor flow dynamics at the insertion point, or […]
Introduction The anaerobic digester gallery is arguably the most complex and hazardous environment within a Water Resource Recovery Facility (WRRF). Engineers are tasked with balancing two volatile forces: the biological/hydraulic requirement to keep sludge moving and heated, and the thermodynamic requirement to safely contain and manage explosive methane gas. A single specification error in either […]
Introduction The safety and structural integrity of anaerobic digesters rely entirely on the precise management of internal pressures. For decades, the specification of gas safety equipment has largely been a binary choice in the North American market. Engineers evaluating Varec Biogas (Ovivo) vs Shand & Jurs for Digestion applications are navigating a landscape defined by […]