Mechanical Completion
Equipment installation, alignment, piping, supports, valves, access, drains, vents, labels and punch categorisation.
Clean • Verify • Start • Stabilise • Sustain
Start-Up & Aftermarket Services
Structured preparation, cleaning, passivation, commissioning and stabilisation—followed by practical lifecycle support for water, wastewater, ZLD, cooling and critical utility systems.
Plan Start-Up SupportFROM INSTALLED EQUIPMENT TO RELIABLE OPERATION
MECHANICAL
COMPLETION
COMPLETION
FIRST CLEANING
& FLUSHING
& FLUSHING
CHEMICAL CLEANING
& PASSIVATION
& PASSIVATION
DRY / WET
COMMISSIONING
COMMISSIONING
PROCESS
STABILISATION
STABILISATION
AFTERMARKET
SUPPORT
SUPPORT
InspectCompletion and readiness
CleanRemove construction contamination
ProtectPassivate suitable metallurgy
CommissionTest equipment and process
SustainSupport reliable operation
Start-Up Readiness01 / COMPLETION 02 / POWER & CONTROLS 03 / UTILITIES 04 / DOCUMENTS 05 / PEOPLE 06 / SAFETY
Commissioning begins before the first motor starts
A disciplined start-up verifies that the plant is complete, clean, safe and aligned with the approved process before water, chemicals, biomass or production streams are introduced.
Electrical and Instrument Readiness
Insulation and continuity checks, motor rotation, calibration, loop checks, I/O verification, alarms and interlocks.
Utility Availability
Power, raw water, drains, instrument air, steam, cooling, chemicals, laboratory and safe disposal arrangements.
Approved Start-Up Basis
P&IDs, control philosophy, OEM instructions, chemical procedures, test formats, SOPs and emergency controls.
Team & Responsibility
Authorised operators, vendor representatives, EHS coverage, communication and escalation responsibilities.
Start-Up Risk Control
PTW, LOTO, chemical handling, confined spaces, stored energy, temporary arrangements and abnormal-operation response.
First Equipment Cleaning
A new plant must be cleaned before it is expected to produce clean water or stable process performance.
Physical CleaningRemoval of debris, welding residue, dust, oil, packaging material and construction contamination.
Water FlushingLine-wise flushing with verified flow path, drains, strainers and acceptance of discharge clarity.
Chemical CleaningMetallurgy- and deposit-specific alkaline, acidic, detergent or specialist cleaning under an approved procedure.
DegreasingRemoval of fabrication oils and organic residue where necessary before service or passivation.
Membrane & Media PreparationPreservative removal, rinsing, loading checks, wetting and conditioning according to manufacturer requirements.
Post-Clean VerificationVisual inspection and relevant pH, conductivity, turbidity, cleanliness or rinse-end criteria.
Control requirement: Cleaning chemistry, concentration, temperature, circulation time and acceptance criteria must be selected for the metallurgy, lining, elastomers, membranes and OEM limits. Spent cleaning solution must be neutralised and disposed of through an approved route.
Chemical Passivation
Passivation is a controlled metallurgical treatment—not a generic chemical wash.
Stainless SteelCleaning, pickling or passivation sequence selected according to surface condition, weld contamination, grade and service requirement.
Carbon SteelProtective film formation or system-specific passivation for compatible closed circuits, boilers, cooling or process-water service.
Galvanised SurfacesControlled initial water chemistry and operating conditions to support protective-film development and reduce white-rust risk.
VerificationProcedure records, solution parameters, exposure time, rinse condition and acceptance inspection.
PreservationWet or dry preservation where start-up is delayed after cleaning or passivation.
Qualification: Passivation is undertaken only after compatibility and risk review. The final procedure must follow applicable metallurgy, equipment-manufacturer recommendations and site EHS requirements.
Commissioning Sequence
A controlled transition from equipment checks to process performance
01VerifyCompletion, punch and utilities
02Dry TestMotors, valves, logic and interlocks
03Wet TestFlows, pressure, leakage and hydraulics
04ConditionMedia, membranes, chemicals or biomass
05Introduce FeedControlled load and sampling
06StabiliseOptimise parameters and resolve deviations
07DemonstrateRecord performance and handover
System-Specific Start-Up
Different systems require different stabilisation logic
Water & MembranesMedia conditioning, membrane flushing, staged pressurisation, normalisation and product-quality verification
Biological TreatmentSeeding where required, biomass development, nutrient balance, aeration and progressive loading
MEE, Dryer & ZLDUtility trials, water runs, thermal stabilisation, feed ramp-up, concentration and solids handling
Cooling & UtilitiesCleaning, passivation where applicable, water chemistry, circulation, heat-load introduction and control review
Aftermarket Services
Support after handover and through changing plant conditions
Preventive Service
Scheduled inspection, calibration coordination, operating review and early identification of deterioration.
Breakdown & Troubleshooting
Root-cause investigation, remote support, site visits and corrective-action planning.
Spares & Consumables
Critical spares, membranes, media, instruments, dosing components and planned replacement support.
Chemical Programmes
Application-specific water and wastewater chemicals, monitoring and dosage optimisation.
Performance Optimisation
Recovery, chemical use, energy, blowdown, sludge, cleaning frequency and lifecycle-cost improvement.
Retrofit & Upgrade
Debottlenecking, equipment replacement, automation improvement and integration of new treatment stages.
AMC & Service Contracts
Defined service visits, response structure, reporting and preventive-support coverage.
Controls & Reporting
PLC/HMI/SCADA modifications, instrument checks, data visibility and reporting support.
Operator Development
Refresher training, SOPs, test methods, log sheets, safety and abnormal-condition response.
Support ModelRemote SupportData review, operating guidance and action follow-up Scheduled VisitsInspection, trends, testing and optimisation Emergency ResponseDefined escalation subject to service coverage Lifecycle ReviewCondition, obsolescence, capacity and upgrade planning
Technical escalation backed by operating evidence
Handover & ContinuityCommissioning RecordsCheck sheets, calibration, loop tests, trials and performance data Operating DocumentsSOPs, set points, chemical procedures, schedules and troubleshooting guidance TrainingOperators, engineers, laboratory personnel and maintenance teams Open-Item ControlPunch points, warranty matters, improvement actions and responsibility
Retain the knowledge created during start-up
Preparing a new plant for its first operating cycle?
Share the system scope, metallurgy, equipment list, present completion status, utilities and planned start-up date. YWT can define the cleaning, passivation, commissioning and support programme.
Plan Start-Up & Aftermarket Support
