Plant commissioning and startup
Commissioning is where a designed plant becomes a working one. Done properly it is a series of measured steps — mechanical completion, cold checks, pr
01
What turnkey includes — and what it does not
- Included — process design, equipment fabrication and supply, control panels and instrumentation, packing for sea freight, container loading plans, erection supervision, cold and hot commissioning, trial batch runs, operator training, commissioning spares and the handover documentation package.
- By the customer — land and site access, civil construction and buildings to our drawings, power connection at the agreed battery limit, water supply, compressed air if specified, fuel for drying, operating labour, safety equipment, permits and product registration.
- By agreement — installation labour, cranes and lifting equipment, extended on-site presence, spare-parts stock delivered with the plant, and remote support package after handover.
02
Delivery sequence and indicative durations
| Stage | Indicative duration | Customer involvement |
|---|---|---|
| Design basis, process design, layout | 3–6 weeks | Data provision and design approvals |
| Civil drawings and site preparation | 4–10 weeks (parallel) | Local contractor mobilisation |
| Equipment fabrication and factory checks | 60–100 days | Witness test if requested |
| Packing, dispatch, sea freight and clearance | 4–8 weeks | Customs and import documents |
| Erection and mechanical completion | 4–8 weeks | Site labour, cranes, power supply |
| Cold commissioning, hot commissioning, trial batches | 2–4 weeks | Operators assigned to the plant |
| Training, performance check, handover | 1–2 weeks | Signed acceptance record |
The critical path is normally civil works and imported equipment clearance, not fabrication.
03
Commissioning: cold, hot, then production
Cold commissioning proves the plant without material: direction of rotation, interlocks, emergency stops, level and temperature instrumentation, air flows, water circuits, dust extraction balance and the control sequence in manual and automatic mode. Every fault found here is a fault that never reaches your production shift.
Hot commissioning introduces real material in increasing load: first the fermentation section, then processing at 30%, 60% and 100% of design rate, then the full line including drying and bagging. We record the actual throughput, moisture at each stage, granule size distribution and bagging weight accuracy, and compare them with the design values.
Trial production is a normal commercial run of several days, operated by your team with our engineers present but not driving. The plant is accepted on that basis, because a plant that only works when the supplier is standing next to it is not commissioned in any useful sense.
04
The handover package
- Approved design basis, process flow diagram and general arrangement drawings (as-built where changed).
- Equipment schedule with nameplate data, installed power and utility connections.
- Electrical drawings, control philosophy and instrument list with calibration records.
- Operating manuals for each process section and the start-up / shutdown sequence for the whole plant.
- Fermentation monitoring record sheets and the temperature, moisture and turning regime the plant was commissioned to.
- Preventive maintenance schedule, lubrication chart and the commissioning spare-parts list.
- Commissioning report with measured throughput, moisture and product quality results.
- Operator training attendance record and the signed acceptance certificate.
05
What usually goes wrong — and how the delivery plan prevents it
| Risk | Effect | Preventive measure in our delivery plan |
|---|---|---|
| Design basis changed after fabrication release | Rework, delay, extra cost | Gate 4 review with written change control |
| Civil works behind schedule | Equipment arrives to an unprepared site | Civil drawings issued early; installation sequence agreed with the contractor |
| Power supply not ready or under-sized | Commissioning blocked | Connected load and transformer check at design stage |
| Moisture at granulation differs from design | Granule quality and dryer overload | Worst-case moisture used to size the dryer; trial batch verification |
| Spare parts not held locally | Long stops after a failure | Commissioning spares delivered with the plant and a critical-spares list |
| Operators change after training | Plant runs outside its regime | Written SOPs and a repeat training option at handover + 6 months |
Plan the delivery schedule with us
Send the site location, target capacity and expected start date; we return a delivery sequence with the critical path identified.
FAQ
Plant engineering questions
Who pays for the cranes and the installation labour?
Normally the customer, through their local contractor, with our supervisor directing the work. Where customers prefer it, we can quote installation labour and lifting as part of the package, but local labour is usually faster to mobilise and cheaper.
How long is an engineer on site?
For a medium line, typically four to eight weeks covering erection supervision, commissioning and training — with a short extension for the trial production. Larger or multi-line plants run in stages with two visits.
Can you commission a plant in winter?
Yes, with the appropriate provisions. Cold commissioning is unaffected; the fermentation system and any water circuits need protection measures, and the drying section benefits from starting in stable weather. The design basis records the climate so the plant is specified accordingly.
What happens if the plant does not reach the guaranteed capacity?
The commissioning report records measured performance against the design values. If throughput is below the agreed figure and the cause is equipment or process design, we correct it — that is the purpose of progressive hot commissioning at 30%, 60% and 100% load rather than a single acceptance run.
Send us your design basis
Tell us the feedstock, the daily tonnage and the product you want to sell. The engineering team replies with the plant configuration, the equipment scope and the information we still need before layout drawings start.
- Feedstock profile — type, moisture, contamination, seasonal peaks
- Capacity — t/day fresh material or t/h finished fertilizer
- Product — powder, granules, bagged retail, bulk compost
- Site — available area, power supply, water, access road
Prefer to talk first? WhatsApp +86 182 0399 3035 or email [email protected].