1. Case Basic Information
1.1 Project Overview
Hella Water, a trusted provider of high-performance water treatment product, undertakes a 40,000m³/day river water purification project. The project aims to treat seasonally turbid river water into high-quality purified water that meets strict standards, catering to large-scale water supply needs (e.g., municipal water supply, industrial use, or agricultural irrigation).
1.2 Design Basis
- Raw water test reports (data from 2021-2025)
- Effluent purified water quality requirements (compliant with PNSDW standard)
- Basic design information provided by the project owner
- Relevant national/international water treatment regulations and design specifications
1.3 Water Inlet & Outlet Indicators
| Indicator | Inlet Condition | Outlet Requirement |
|---|---|---|
| Treatment Capacity | 40,000m³/day | 39,600m³/day (actual output) |
| Raw Water Source | River water (seasonally turbid) | – |
| pH | 7.16-7.75 | 6.5-8.5 (meets PNSDW) |
| Turbidity (NTU) | 3.09-15.1 | ≤5.0 (PNSDW); ≤0.5 (actual speculation) |
| Color (TCU) | 6-8 | ≤10.0 (PNSDW); ≤3 (actual speculation) |
| Total Dissolved Solids (mg/L) | 91.1-134 | ≤600.0 (PNSDW) |
| Recovery Rate | – | ≥98% |
| Purification Rate | – | ≥90% |
| Operating Temperature | – | 5℃~50℃ |
| Design Temperature | 20-25℃ | – |
1.4 Design Scope
The solution covers the entire water purification process from water inlet to purified water output, including reverse osmosis deionizer machine, water feed pump, automatic controller, and other core equipment. Excluded scopes: infrastructure construction, water extraction, lightning protection, fire protection, and local water supply pipeline network.
2. Project Core Pain Points and Requirements
2.1 Core Pain Points
- Seasonal Turbidity Fluctuation: Raw water turbidity reaches up to 15.1 NTU (exceeding the standard limit of 5.0 NTU), which challenges conventional treatment processes.
- Microbial Contamination Risk: River water may contain bacteria, algae, and other microorganisms, requiring effective disinfection to meet hygienic standards.
- Sludge Disposal Pressure: Large treatment capacity leads to significant sludge production, requiring efficient sludge dewatering and volume reduction solutions.
- Stable Operation Demand: The project needs to maintain consistent water output and quality under varying raw water conditions.
2.2 Project Requirements
- Strictly comply with PNSDW standards and full compliance with sensory and hygienic requirements.
- Achieve high water recovery rate (≥98%) to reduce water waste.
- Adopt full automatic control to save labor costs and ensure operational stability.
- Balance initial investment (CAPEX) and operating costs (OPEX) with energy-efficient equipment.
- Ensure equipment corrosion resistance and long service life under outdoor operating conditions.
3. Hella Water Customized Solutions
3.1 Technical Process
River water → Screed scrubber → Intake pump (centrifugal pump or submersible sewage pump) → Pre-oxidation dosing system (optional) → Raw water sediment reservoir (civil construction) → Coagulation unit (chemical dosing system) & Flocculation unit (statistic mixer) → Homogeneous media filter tank → Disinfectant System → Water supply system → Water demand areaParallel processes: Sludge Treatment Equipment → Automation Control System
3.2 Key Equipment Configuration
| Equipment Category | Specifications & Features | Corresponding Product Link |
|---|---|---|
| Intake Pump System | Centrifugal/submersible pump, flow rate ~1667m³/h, head determined by water intake location | centrifugal pump |
| Dosing Systems | Pre-oxidation (sodium hypochlorite), coagulant (PAC) storage tank + metering pump + mixing device | chemical dosing system |
| Flocculation & Sedimentation | 3-4 stages mechanical/hydraulic flocculation tank (residence time 15-20min); Lamella Clarifier (HDPE/PP inclined tube filler, 60° inclination) | multi-stage filter |
| Filtration Unit | Homogeneous media filter tank (effective particle size 0.9-1.2mm, filtration rate 8-10m/h); backwash system (water intensity 15L/(m²·s), air intensity 50m³/(m²·h)) | multi media filter |
| Disinfection Equipment | Recommended: UV + Sodium hypochlorite generator (primary UV disinfection + residual chlorine maintenance) | commercial water filter |
| Water Supply Pump | Multi-stage centrifugal pump, flow rate ~2000m³/h (with standby units) | high pressure pump |
| Sludge Treatment | Sludge thickening tank (solids loading 30-50kg/m²·day); belt filter press/centrifugal dewatering machine (moisture content ≤80%) | sewage treatment machine |
| Automation Control | PLC/SCADA system + online monitors (turbidimeter, pH meter, residual chlorine analyzer, flow meter) | industrial water filtration |
3.3 Design Features
- Skid-Mounted Integration: Entire running parts are skid-mounted for easy installation and transportation.
- Full Automation: PLC/SCADA system monitors the entire process, reducing manual intervention and operational errors.
- Energy Efficiency: Variable frequency operating power and recycled backwash water minimize energy and water consumption.
- Corrosion Resistance: Key equipment adopts HDPE, PP, and rubber-lined steel materials to adapt to harsh working conditions.
4. Project Effect Verification
4.1 Water Quality Compliance
Purified water fully meets PNSDW standards and sensory/hygienic requirements, with key indicators verified as follows:
| Parameter | Speculation Value | Compliance Status |
|---|---|---|
| pH | 6.5-8.5 | Meet the standard |
| Turbidity (NTU) | ≤0.5 | Meet the standard |
| Color (TCU) | ≤3 | Meet the standard |
| Iron (mg/L) | ≤1.000 | Meet the standard |
| Chloride (mg/L) | ≤250.000 | Meet the standard |
| Copper (mg/L) | ≤1.000 | Meet the standard |
| Chromium (mg/L) | ≤0.050 | Meet the standard |
| Manganese (mg/L) | ≤0.400 | Meet the standard |
| Total Hardness (mg/L) | ≤300.000 | Meet the standard |
| Sulfate (mg/L) | ≤250.000 | Meet the standard |
| Nitrate (mg/L) | ≤50.000 | Meet the standard |
| Total Dissolved Solids (mg/L) | ≤600.000 | Meet the standard |
4.2 Key Performance Indicators
- Water Recovery Rate: ≥98% (39,600m³/day output from 40,000m³/day inlet)
- Purification Rate: ≥90% (turbidity reduced from 15.1 NTU to ≤0.5 NTU)
- Operational Stability: Continuous operation under 5℃~50℃, adapting to seasonal raw water quality changes
- Sludge Disposal Efficiency: Sludge moisture content reduced to ≤80%, minimizing disposal costs
5. Case corresponding product quotation description
5.1 Quotation Composition
| Cost Item | Description |
|---|---|
| Equipment Cost | Core equipment (pumps, filters, dosing systems, disinfection devices, automation tools) |
| Installation & Commissioning Cost | On-site installation, pipeline connection, system debugging |
| Technical Service Cost | Design optimization, operator training, after-sales support |
| Transportation Cost | Skid-mounted equipment and accessories transportation |
| Spare Parts Cost | 易损件 (filters, gaskets, sensors) for 1-year operation |
5.2 Cost Difference of Equipment Options
| Disinfection Option | CAPEX (Initial Investment) | OPEX (Annual Operating Cost) | Recommendation |
|---|---|---|---|
| Sodium hypochlorite dosing device | Low | High (chemical purchase) | Suitable for short-term projects |
| Sodium hypochlorite generator | High | Low (on-site production) | Suitable for long-term projects |
| UV + Sodium hypochlorite generator | Medium | Medium | Balanced performance & cost |
5.3 Custom Quotation Requirements
To provide an accurate quotation, customers need to provide:
- Specific raw water quality test report (turbidity, pH, TDS, heavy metals, etc.)
- Desired water output and application scenario (municipal, industrial, agricultural)
- Local environmental regulations and water quality standards
- Installation site conditions (space, power supply, water source)
6. Common Questions (FAQ)
6.1 Can the system maintain stable treatment effect for highly turbid river water?
Yes. The combination of pre-oxidation, coagulation-flocculation, and homogeneous media filtration effectively handles turbidity up to 20 NTU. The multi-stage filter and automatic backwash system ensure continuous and stable operation even in seasonal turbidity peaks.
6.2 What is the automation level of the system?
The system adopts PLC/SCADA full-automatic control, which can realize real-time monitoring of flow, pressure, turbidity, and residual chlorine. It supports remote operation and fault alarm, requiring only 1-2 operators for daily inspection, significantly reducing labor costs.
6.3 How energy-efficient is the 40,000m³/day system?
The system is equipped with variable frequency centrifugal pump and recycled backwash water. The specific energy consumption is about 0.3-0.5 kWh/m³, which is 15-20% lower than traditional water treatment systems.
6.4 What is the maintenance cycle of key equipment?
- Filter media replacement: 2-3 years
- Pump maintenance: 6-month routine inspection, 2-year major maintenance
- UV lamp replacement: 12-18 months
- Sensors calibration: Monthly routine calibration
6.5 Can the system be customized for different water treatment needs?
Yes. Hella Water provides customized solutions for industrial water filtration, agricultural water purification, commercial water filter, and household water purifier. The treatment capacity can be adjusted from 1m³/day to 100,000m³/day according to customer needs.
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