Sachet Water Line Case: 3,500 BPH Pouch Water Plant in Nairobi, Kenya

Across Kenya’s rapidly growing urban centers, sealed sachet water is the everyday choice for millions who need safe, affordable drinking water on the go. For entrepreneurs, a well-run pouch water plant can serve strong daily demand while keeping per-unit costs very low.

This case study documents a 3,500 BPH sachet water plant that zoolinked mechanical designed, manufactured and commissioned for an investor in Nairobi, Kenya — walking through every stage from raw water analysis to a fully operating pouch line.

Project Overview

Item	Detail
Location	Nairobi, Kenya
Product	500 ml sealed drinking water pouches
Designed capacity	3,500 pouches per hour
Water source	Municipal + borehole
Plant footprint	Approx. 130 m²
Operators required	2 per shift
Scope	Turnkey: design, manufacturing, installation, commissioning, training

1. Project Background & Client Requirements

The investor targeted busy urban consumers and informal retailers who sell chilled sachets daily. Demand was strong year-round, driven by unreliable tap water and a hot climate.

As a first-time operator, the client needed a compact, high-output line that a small team could run reliably with minimal training.

The client set several clear requirements for the project:

• A compact plant fitting a ~130 m² rented unit
• Robust, easy-to-operate equipment for non-technical staff
• High output of around 3,500 pouches/hour to serve strong demand
• Water quality reliably meeting Kenyan drinking water standards
• Low per-pouch running cost to stay competitive

2. Raw Water Analysis

Our engineers reviewed the client’s municipal and borehole water reports. The supply showed moderate hardness, seasonal turbidity and chlorine, which shaped the treatment train:

• Turbidity: seasonal → multi-media pre-filtration
• Chlorine/odor: present → activated carbon filtration
• Hardness & TDS: moderate → softening + two-stage RO
• Microbial risk: present → UV + ozone dual disinfection

3. Turnkey Solution & Process Flow

zoolinked mechanical supplied a complete packaged drinking water line integrating pretreatment, purification and automatic pouch filling. The full process flow is:

1. Raw water tank → feed pump
2. Multi-media (quartz sand) filter — removes turbidity
3. Activated carbon filter — removes chlorine, odor and organics
4. Water softener — protects RO membranes
5. 5 µm security filter
6. Two-stage reverse osmosis (RO) — stable low-TDS purified water
7. Purified water storage tank (SUS304)
8. UV sterilizer + ozone generator — dual disinfection
9. Automatic sachet filling & sealing machine — 3,500 pouches/hour
10. Date coding → shrink-wrap packing for distribution

4. Equipment Configuration

The line balanced high output, hygiene and low cost:

Equipment	Specification / Function
Multi-media filter	Removes turbidity & suspended solids
Activated carbon filter	Removes chlorine, color and odor
Water softener	Automatic resin softener, protects RO
Two-stage RO system	2.5 m³/h low-TDS output
Purified water tank	SUS304 sanitary storage
UV + ozone disinfection	Dual sterilization barrier
Automatic sachet machine	Form-fill-seal, 3,500 pouches/hour
Coding & packing	Date coder + shrink-wrap

5. Installation & Commissioning

After factory testing, the equipment was shipped to Nairobi and installed within the 130 m² unit. Installation and commissioning were completed in about three weeks, including:

• Positioning and connecting the treatment skid and RO system
• Setting up the storage tank, UV and ozone units
• Installing and calibrating the sachet machine
• Trial runs with water testing to confirm compliance
• Seal-strength and fill-volume checks for consistent quality

6. Operator Training

The two-person crew received hands-on training covering:

• Daily start-up, shutdown and CIP cleaning
• Monitoring RO performance and changing cartridges
• Operating the sachet machine and adjusting seal/fill settings
• Basic troubleshooting and routine maintenance

7. Results & Return on Investment

After commissioning and training, the plant reached a stable 3,500 pouches per hour with two operators per shift:

• Stable output: 3,500 pouches/hour, ~28,000 per 8-hour shift
• Only 2 operators per shift, keeping unit cost low
• Water quality consistently met Kenyan drinking water standards
• Low per-pouch cost enabled fast market uptake

Thanks to strong demand and low running costs, the client recovered the core investment within the first year and is planning added capacity.

Conclusion

This Nairobi sachet water project shows how a well-designed, high-output pouch line turns strong urban demand into a profitable business. From water analysis and process design through installation and training, zoolinked mechanical delivered a complete turnkey solution built for reliability and low cost.