Technical papers, process references, whitepapers, and downloadable resources for water treatment professionals working in oil sands, mining, and industrial applications.
Full technical specifications: PVDF/PES hollow fiber membranes, 0.1–0.2 µm pore size, system performance data (TSS >99%, O&G 80–95%), module sizes, operating conditions, and integration guidance for RO/NF/ZLD trains.
TFC polyamide spiral-wound RO: 600–1,200 psi, 80–90% water recovery, >99% TDS rejection, permeate <500 mg/L TDS. Module sizes, pretreatment requirements, comparison vs. MVR and conventional SWRO.
Simplified process flow references for common treatment train configurations. These are for orientation purposes — full P&IDs are developed project-specifically.
Typical process sequence for treating oil sands saline pond water at 1,200 psi: coarse screening → DAF/MF pretreatment → cartridge filtration → high-pressure SWRO → permeate reuse / concentrate management. Key design considerations: scaling ions (Ca, Mg, SO₄, Ba, Sr), SDI reduction targets (<3), antiscalant selection at high recovery.
Brine concentrate (<10–20% of feed) routed to lined pond, injection well, or ZLD for further volume reduction.
Zero Liquid Discharge configuration for SAGD produced water: MF pretreatment removes emulsified hydrocarbons and suspended solids ahead of high-recovery RO (80–90%). RO brine concentrate routed to MVC/MVR evaporator for thermal concentration. Distillate recovered for boiler feed or process reuse. Residual solids managed by centrifuge or crystallizer.
MF and Advanced RO scope self-performed by GWTS. Thermal and crystallization equipment supplied by partner or client-selected vendor.
Rapid deployment configuration for emergency or temporary produced water treatment: trailer-mounted unit connects to existing site water infrastructure. Pretreatment cartridge filters supplied with unit. Permeate directed to storage tank or process reuse. Concentrate to existing disposal or injection infrastructure. Typical site connection time: 3–5 days.
MF pretreatment trailer available separately for high-TSS or oily feedwaters requiring pretreatment ahead of the RO unit.
Key technical references relevant to oil sands water treatment, membrane systems, and regulatory context. Summaries provided; links direct to authoritative sources.
The primary standard for measuring the fouling potential of water fed to reverse osmosis systems. SDI is the key pretreatment quality metric: RO manufacturers require SDI <5 at the membrane inlet, with <3 strongly preferred for high-recovery systems. Measured using a 0.45 µm membrane filter at 30 psi. Essential for pilot test design and pretreatment specification.
AER Directive 085 establishes requirements for oil sands operators to manage fluid tailings volumes and achieve progressive reclamation. The directive creates significant pressure on operators to deploy active dewatering and water treatment technologies — including centrifugation, filtration, and membrane systems — to reduce the volume of fluid tailings accumulating in ponds. Directly relevant to GWTS MFT treatment and tailings water treatment services.
Peer-reviewed literature consistently demonstrates that PVDF hollow fiber MF membranes achieve >99% TSS removal and 80–95% oil & grease reduction from produced water streams when operated in outside-in crossflow configuration. Flux rates of 30–90 LMH are achievable with weekly CIP regimens using NaOH and citric acid at pH 12–13 and pH 2–3 respectively. Key fouling mechanisms: oil adhesion to membrane surface and biofouling in warm produced water streams above 35°C.
High-recovery RO (80–90%) applied to oil sands produced water requires careful scaling analysis using Langelier Saturation Index (LSI), Ryznar Stability Index (RSI), and Stiff & Davis Stability Index (S&DSI). Primary scaling risks at high recovery: CaCO₃, CaSO₄, BaSO₄, SrSO₄, and silica. Antiscalant selection and dose optimization through jar testing is critical. Operating pressure for typical SAGD produced water streams ranges 600–900 psi; saline pond water may require 1,000–1,200 psi. Recommended pretreatment: MF/UF to SDI <3, pH adjustment to 6.5–7.0, antiscalant at 3–8 mg/L.
Directive 074 and its successor Directive 085 establish minimum performance criteria for oil sands tailings management, including requirements for fluid fine tailings (FFT) trafficability and reclamation readiness. GWTS MFT dewatering programs using centrifugation directly address compliance pathways under these directives by accelerating the consolidation of mature fine tailings to reclamation-ready material.
DLE technologies selectively extract lithium from brine solutions using ion exchange, adsorption, or membrane-based processes. Advanced RO plays an enabling role in DLE systems by pre-concentrating lithium-bearing brines and providing high-purity water streams for lithium re-dissolution and product purification. Key RO design requirements for DLE integration: consistent permeate TDS <500 mg/L, stable flux at varying brine compositions, and resistance to lithium-specific scaling compounds. GWTS demonstrated this application in a $1.5M demonstration-scale DLE program at Calgary (2022–2024).
ISNetworld is the leading contractor safety management platform used by major oil sands operators in Alberta to pre-qualify contractors for site access. ISN registration requires maintenance of current WCB/WSIB certificates, liability insurance, safety management programs (including hazard assessment, incident reporting, and site-specific orientations), and annual document renewal. GWTS maintains active ISNetworld registration, enabling rapid mobilization to oil sands and heavy industrial sites across Northern Alberta without contractor qualification delays.
The definitive industry reference for RO and NF system design, published by the American Water Works Association. Covers feedwater quality limits (SDI, turbidity, oil and grease), design flux and recovery selection, tapered staging and array design, antiscalant and chemical dosing, and clean-in-place (CIP) protocols. The basis for the pretreatment acceptance criteria used across GWTS RO and SWRO designs, including the SDI <5 / <3 targets and normalized performance monitoring methods applied on every pilot and full-scale system.
Directive 058 establishes the requirements for managing upstream petroleum industry waste in Alberta, covering waste classification and tracking, storage, treatment, recycling, and disposal. It directly governs how produced water, slop oil, and other oilfield wastes are handled and moved through transfer and disposal facilities — the regulatory framework within which GWTS T&D programs, slop oil recovery, and produced water treatment services operate. Compliance with Directive 058 waste-tracking requirements is a baseline expectation for any site services program.
Peer-reviewed studies of RO and NF membranes applied to OSPW report high rejection of naphthenic acids — the principal organic contaminant of concern — with tight RO achieving >95% rejection and NF achieving 70–90% depending on acid molecular weight. The dominant fouling mechanisms are organic adsorption and cake formation from dissolved organics rather than mineral scaling. These findings are directly relevant to basal aquifer treatment and pond water remediation applications where organic fouling control, not just scaling control, drives pretreatment design and cleaning strategy.
The MDMER establish national effluent quality limits for metal mines and diamond mines, including maximum authorized concentrations for arsenic, copper, cyanide, lead, nickel, zinc, total suspended solids, and radium-226, plus monthly average flow-based loading limits. As lithium, critical minerals, and metals projects advance across Western Canada, MDMER compliance shapes water treatment and discharge design at the feasibility stage — increasingly pushing projects toward high-recovery membrane systems, ZLD, and treated-water reuse rather than conventional discharge.
The Truth and Reconciliation Commission’s Call to Action #92 calls on the Canadian corporate sector to adopt the United Nations Declaration on the Rights of Indigenous Peoples as a reconciliation framework — including meaningful consultation, equitable employment and training, and Indigenous economic participation in resource projects. For water treatment providers working in Northern Alberta, it reframes Indigenous engagement from consultation compliance to procurement, hiring, and partnership commitments. GWTS’s 60–80% local Indigenous workforce target on Northern Alberta projects is a practical implementation of this standard, detailed further on our Indigenous Engagement page.