1. Case Basic Information
1.1 Company Overview
Hella Water Treatment Equipment Technology Co., Ltd. is a professional provider of commercial water recycling solutions, specializing in car washing water purification, wastewater treatment, and water reuse systems. The company offers customized, energy-efficient equipment compliant with international standards, serving global markets including Thailand, Australia, and South Africa. Its products focus on resource conservation and environmental protection, with end-to-end support from design to after-sales. For more commercial water filter solutions, visit [commercial water filter].
1.2 Project Background
This project targets car washing facilities (e.g., commercial car washes, auto service centers) needing to recycle and purify wastewater for reuse. Car washing water contains suspended solids, grease, heavy metals, and organic pollutants, which require multi-stage treatment to meet reuse standards. The system is designed to process 7m³/h of car washing wastewater into reusable water, reducing water consumption by 70-80% and lowering operational costs.
1.3 Raw Water & Target Water Quality Data
Raw Water Quality (Car Washing Wastewater)
| Parameter | Test Value | Unit | Compliance Status |
|---|---|---|---|
| Total Suspended Solids (TSS) | 5 mg/L | mg/L | ❌ Non-compliant |
| pH | 6.06 | pH | ❌ Non-compliant (too acidic) |
| Nitrite (NO₂⁻) | 0.157 mg/L | mg/L | ❌ Exceeds WHO (≤0.1 mg/L) & KEBS (≤0.003 mg/L) |
| Iron (Fe) | 0.76 mg/L | mg/L | ❌ Exceeds (≤0.3 mg/L) |
| Ammonia (NH₃) | 0.58 mg/L | mg/L | ❌ Slightly exceeds (≤0.5 mg/L) |
| Color (Pt-Co) | 209 | Pt-Co | ❌ Exceeds (≤15) |
| Turbidity | 13.3 | NTU | ❌ Exceeds (≤5 NTU) |
Target Water Quality (Reusable Car Washing Water)
| Parameter | Standard Value | Unit |
|---|---|---|
| TSS | 0 | mg/L |
| pH | 6.5-8.5 | pH |
| Nitrite (NO₂⁻) | ≤0.003 | mg/L (KEBS standard) |
| Iron (Fe) | ≤0.3 | mg/L |
| Ammonia (NH₃) | ≤0.5 | mg/L |
| Color (Pt-Co) | ≤15 | Pt-Co |
| Turbidity | ≤0.2 | NTU |
| Grease & Oil | ≤5 | mg/L |
| Bacteria Removal Rate | ≥99% | – |
2. Core Pain Points and Requirements of the Project
2.1 Raw Water Quality Pain Points
- High Contaminant Load: TSS, turbidity, and color exceed standards, causing cloudy water and equipment clogging.
- Chemical Imbalance: Acidic pH (6.06) corrodes car washing equipment; excessive nitrite and iron pose environmental risks.
- Organic and Grease Pollution: Car washing wastewater contains grease, detergents, and organic matter that require targeted removal.
- Resource Waste: Unprocessed wastewater is discarded, increasing water costs and environmental impact.
2.2 Project Operation Requirements
- Treatment Capacity: 7 m³/h of car washing wastewater, producing reusable water for continuous car washing.
- Purification Efficiency: Remove ≥95% of TSS, grease, and heavy metals; adjust pH to 6.5-8.5.
- Automation Level: Fully automatic operation with manual backup; automatic backwashing and cleaning.
- Durability: Corrosion-resistant materials (stainless steel, carbon steel) to withstand harsh car washing chemicals.
- Cost-Effectiveness: Low energy consumption and consumable costs; quick return on investment (ROI) via water savings.
- Compliance: Meet local environmental regulations for wastewater discharge/reuse.
2.3 Additional Requirements
- Compact Design: Suitable for car wash facilities with limited space.
- Easy Maintenance: Simple consumable replacement (filters, membranes) and remote technical support.
- Safety Features: Overload protection, pressure monitoring, and liquid level alarms.
3. Hella Water Customized Solutions
3.1 System Model and Core Configuration
Hella Water provides the HLCW-7T Car Washing Water Purification Machine (6-stage filtration), integrating pretreatment, purification, disinfection, and control modules. The detailed configuration is as follows:
| No. | Part Name | Description |
|---|---|---|
| 1 | Raw Water System | Raw water pump (ZS10-30) + butterfly valves (2 pcs) + water inlet electric valve |
| 2 | Pretreatment System | Air flotation device (carbon steel tank, 2×1×1m) + quartz sand filter (550kg media) + activated carbon filter (200kg media) |
| 3 | Dosing System | PE dosing tank + dosing pump (5bar, 2L/H) for flocculation, coagulation, and pH adjustment |
| 4 | Precision Filtration | Stainless steel precision filter + PP polymer filter element (removes ≥5μm particles) |
| 5 | Ultrafiltration (UF) System | 7 integrated PVC UF membranes (Ф160), in-out flow type; removes turbidity, color, and microorganisms |
| 6 | Cleaning System | CIP cleaning system (cleaning tank + cleaning pump ZS12-50 + precision filter + adjusting valve) |
| 7 | Control & Protection | Electrical integrated controller, auto/manual control, pressure gauge (0-1MPa), flowmeter, high/low pressure switch, overload protection |
| 8 | Storage System | Pure water tank (not included; recommended for on-site installation) |
For more details on ultrafiltration systems, visit [ultrafiltration].
3.2 Key Technical Parameters of HLCW-7T
| Parameter | Specification |
|---|---|
| Water Output Capacity | 7 m³/h |
| Power Supply | 380V/3P/50Hz |
| Filtration Stages | 6-stage (air flotation → sand filter → carbon filter → precision filter → UF → dosing) |
| Membrane Material | PVC (UF membranes) |
| Operating Pressure | 0.2-0.6 MPa |
| Operating Temperature | 5℃-45℃ |
| Lead Time | 15 days |
| Design Service Life | 8-10 years |
3.3 Process Design
3.3.1 Multi-Stage Purification Process
- Pretreatment:
- Air flotation device removes grease, insoluble organic matter, and suspended solids via scraping and separation.
- Quartz sand filter eliminates sand, rust, and silt; activated carbon filter adsorbs organic matter, heavy metals, and residual chemicals. For pre-treatment systems, see [pre treatment filtration system].
- Precision & UF Filtration:
- Precision filter captures fine particles (≥5μm) to protect UF membranes.
- UF membranes (0.01μm pore size) reduce turbidity to <0.2 NTU, remove color, and microorganisms.
- Chemical Dosing & pH Adjustment:
- Flocculation/coagulation dosing accelerates sedimentation of pollutants.
- pH adjustment dosing neutralizes acidic water to 6.5-8.5. For chemical dosing systems, see [chemical dosing system].
- Cleaning & Control:
- Automatic backwashing (via backwash pump ZS14-40) and CIP cleaning maintain system efficiency.
- PLC control system monitors pressure, flow, and water quality; triggers alarms for abnormalities.
4. Project Effect Verification
4.1 Purified Water Quality Test Results
| Parameter | Raw Water Value | Purified Water Value | Removal Efficiency |
|---|---|---|---|
| TSS | 5 mg/L | 0 mg/L | 100% |
| pH | 6.06 | 6.8 | – |
| Nitrite (NO₂⁻) | 0.157 mg/L | 0.01 mg/L | ≥93.0% |
| Iron (Fe) | 0.76 mg/L | 0.01 mg/L | ≥98.7% |
| Ammonia (NH₃) | 0.58 mg/L | 0.01 mg/L | ≥98.3% |
| Color (Pt-Co) | 209 | <1 | ≥99.5% |
| Turbidity | 13.3 NTU | <0.2 NTU | ≥98.5% |
| Grease & Oil | – | ≤5 mg/L | ≥90% |
4.2 System Operation Performance
- Water Savings: Recycles 7m³/h of wastewater, reducing fresh water consumption by ~80% for car washes.
- Stability: Continuous 48-hour operation shows water quality fluctuation ≤±1%, no membrane fouling.
- Energy Efficiency: Operating power ~5-7 kW, low energy consumption per cubic meter of treated water.
- Automation: Fully automatic operation reduces manual intervention by 90%; automatic cleaning extends filter/membrane lifespan.
- Space-Saving: Compact design fits in standard car wash facilities (no additional civil engineering required).
4.3 Industry Application
Successfully deployed in commercial car washes globally, achieving ROI within 6-12 months via water and sewage fee savings. Complies with environmental regulations for wastewater reuse. For water recycling systems, visit [waste water treatment machine].
5. Case Corresponding Product Quotation Description
5.1 Main Equipment Quotation
| Item | Model | Qty | Unit Price (USD) | Total Price (USD) | Description |
|---|---|---|---|---|---|
| 7m³/H Car Washing Water Purification Machine | HLCW-7T | 1 | 15,600 | 15,600 | 6-stage filtration, includes sand filter, UF membranes, controller cabinet; EXW price |
5.2 Terms & Conditions
| Term Type | Details |
|---|---|
| Price Inclusions | Complete filter system, controller cabinet, international standard packaging |
| Power Supply | 380V/3P/50Hz (customizable for other voltages) |
| Payment Term | T/T: 50% deposit for production, 50% balance paid before shipment |
| Lead Time | 15 days from receipt of deposit |
| Warranty | 12 months from delivery; free repair/replacement for non-human-induced failures |
| Installation & Maintenance | Free manual, video guides, and online support; on-site installation available (customer bears engineer costs: visa, flights, accommodation, labor) |
| Customization | Available for capacity, voltage, or specific water quality requirements (price/production time varies) |
5.3 Annual Consumables Cost (Estimated)
| Consumable Name | Specification | Unit Price (USD) | Annual Consumption | Annual Cost (USD) |
|---|---|---|---|---|
| PP Filter Elements | Precision filter (40″) | 25/piece | 8 pieces | 200 |
| UF Membranes | Ф160 PVC | 350/piece | 2 pieces | 700 |
| Quartz Sand | Filter media | 0.3/kg | 200 kg | 60 |
| Activated Carbon | Filter media | 1.2/kg | 100 kg | 120 |
| Chemicals (Flocculant/Coagulant) | Industrial grade | 1.5/kg | 500 kg | 750 |
| Total | – | – | – | 1,830 |
6. Common Questions (FAQ)
6.1 Maintenance and Consumables
Q1: How often do consumables need to be replaced?A1: PP filter elements (3-6 months), UF membranes (2-3 years), quartz sand (1-2 years), activated carbon (6-12 months). Frequency depends on wastewater contamination level. For replacement parts, visit [accessory supporting equipment].
Q2: What is the CIP cleaning frequency?A2: Recommended every 1-2 months under normal operation; triggered automatically by pressure difference or timed cycles.
6.2 Warranty and Support
Q1: What is covered under the 12-month warranty?A1: Manufacturing defects in equipment (pumps, membranes, control system). Consumables (filters, chemicals) and human-induced damages are excluded.
Q2: Can Hella Water provide technical support for overseas customers?A2: Yes. 7×24 online technical support is available via video calls, manuals, and troubleshooting guides. On-site support is optional (customer bears related costs).
6.3 Operation and Safety
Q1: Is the system easy to operate?A1: Yes. It features auto/manual control modes; the integrated controller simplifies operation—just start the system, and it runs automatically (including backwashing and cleaning).
Q2: How to handle system alarms?A2: Alarms (high/low pressure, liquid level) are displayed on the controller. Common issues (e.g., filter clogging) can be resolved via automatic backwashing; contact support for complex faults.
6.4 Performance
Q1: Can the system handle high-grease car washing wastewater?A1: Yes. The air flotation device efficiently removes grease (removal rate ≥90%), protecting subsequent filters and membranes.
Q2: What is the maximum raw water turbidity the system can handle?A2: The system is designed for raw water turbidity ≤20 NTU. For turbidity >20 NTU, a pre-sedimentation tank is recommended.
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