9500m³/Day Wastewater Reuse Project Case

1. Case Basic Information

1.1 Company Overview

Hella Water Treatment Equipment Technology Co., Ltd. is a leading provider of large-scale wastewater reuse solutions, specializing in integrated systems combining ultrafiltration (UF), reverse osmosis (RO), and sludge treatment. With expertise in municipal and industrial wastewater treatment, the company offers energy-efficient, high-recovery systems that comply with international water reuse standards. Its solutions are widely used for irrigation, industrial process water, and non-potable municipal applications, focusing on resource conservation and environmental sustainability. For more wastewater treatment solutions, visit [waste water treatment machine].

1.2 Project Background

This project is a municipal wastewater reuse initiative in Ghaen City, targeting the treatment and reuse of 9500m³/day of wastewater from Ghaen Wastewater Treatment Plant (WWTP). The treated water is reused for irrigation, reducing reliance on freshwater resources and minimizing environmental discharge. The system integrates inline filtration, UF, RO, and sludge concentration processes, with a 3000m³ reservoir for water storage and flow regulation.

1.3 Raw Wastewater & Target Reuse Water Quality Data

Raw Wastewater Quality (from Ghaen WWTP)

Parameter	Test Value	Unit
COD (Chemical Oxygen Demand)	60 mg/L	mg/L
BOD₅ (Biochemical Oxygen Demand)	30 mg/L	mg/L
TSS (Total Suspended Solids)	40 mg/L	mg/L
Temperature	20-25℃	℃
Pressure	240 mbar	mbar

Target Reuse Water Quality (Irrigation Standard)

Parameter	Standard Value	Unit	Compliance Reference
COD	≤18 mg/L	mg/L	Irrigation Water Quality Standards
BOD₅	≤9 mg/L	mg/L	–
TSS	≤1 mg/L	mg/L	–
pH	6.5-8.5	–	–
Turbidity	≤1 NTU	NTU	–
Total Dissolved Solids (TDS)	≤1000 mg/L	mg/L	–

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2. Core Pain Points and Requirements of the Project

2.1 Raw Wastewater Pain Points

• Organic Pollution: COD (60 mg/L) and BOD₅ (30 mg/L) exceed irrigation water standards, requiring effective organic removal.
• Suspended Solids: TSS (40 mg/L) causes fouling in UF/RO membranes, reducing system efficiency and lifespan.
• Flow Fluctuation: Wastewater inflow varies, demanding a buffer system (3000m³ reservoir) for stable operation.
• Sludge Disposal: Wastewater treatment generates sludge that needs concentration and proper disposal to avoid secondary pollution.

2.2 Project Operation Requirements

• Treatment Capacity: 9500m³/day of wastewater, with stable treated water output for irrigation.
• Pollutant Removal: COD removal ≥70%, BOD₅ removal ≥70%, TSS removal ≥97.5%.
• Recovery Rate: Maximize water recovery for irrigation; minimize reject water volume.
• Automation Level: Fully automatic control with backwash functions, sludge concentration, and flow regulation.
• Reliability: Redundant pump design (1+1 or 6+1) to ensure continuous operation.
• Sludge Management: Sludge concentration and proper disposal, with solid waste generation ≤330g/day.
• Environmental Compliance: Meet local irrigation water quality standards and wastewater discharge regulations.

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3. Hella Water Customized Solutions

3.1 System Model and Core Configuration

Hella Water provides the HLWW-9500 Wastewater Reuse Integrated System, integrating pretreatment, UF, RO, sludge treatment, and storage modules. The detailed configuration is as follows:

No.	Part Name	Description
1	Pretreatment System	3000m³ storage reservoir + inline filtration (ST-106 sand filter) + static mixer (ST-105) + coagulant dosing system
2	UF Filtration System	UF filters (ST-111) + backwash tank + 6+1 redundant UF feed pumps (Q=900m³/day each)
3	RO Filtration System	RO membranes + high-pressure pumps (P=1500-2500 mbar) + reject water line to irrigation
4	Sludge Treatment System	Sludge concentrator (1+3 redundant units) + sludge thickener + supernatant recovery tank (ST-601)
5	Control & Monitoring	PLC control system + flow meters, pressure gauges, and water quality sensors (COD, TSS, BOD)
6	Piping & Valves	UPVC piping (ST-200mm main line) + gate valves, check valves, ball valves + bypass line (ST-103)
7	Storage & Distribution	70,000m³ treated water reservoir + irrigation distribution pipeline

For more ultrafiltration solutions, visit [ultrafiltration]; for reverse osmosis details, visit [reverse osmosis].

3.2 Key Technical Parameters of HLWW-9500

Parameter	Specification
Wastewater Treatment Capacity	9500m³/day
UF Operating Pressure	1000 mbar
RO Operating Pressure	1500-2500 mbar
Pump Redundancy	UF pumps: 6+1; Sludge pumps: 1+1; RO pumps: 1+1
Sludge Solid Waste Output	≤330g/day
System Recovery Rate	≥85% (treated water for irrigation)
Operating Temperature	20-25℃
Piping Material	UPVC (corrosion-resistant)
Control Mode	Fully automatic PLC control with manual backup
Design Service Life	15 years

3.3 Process Design

3.3.1 Core Treatment Process

Wastewater from Ghaen WWTP → 3000m³ Reservoir → Inline Sand Filtration → Static Mixer (Coagulant Dosing) → UF Filtration → RO Filtration → Treated Water (70,000m³ Reservoir) → Irrigation→ Sludge from Filtration → Sludge Concentrator → Sludge Thickener → Solid Waste Disposal→ Supernatant → Recovery Tank → Re-circulated to Pretreatment

3.3.2 Key Unit Functions

• UF Filtration: Removes TSS, colloids, and most microorganisms, protecting RO membranes; automatic backwash triggered by pressure difference.
• RO Filtration: Reduces COD, BOD₅, and TDS to meet irrigation standards; reject water is reused for irrigation to maximize recovery.
• Sludge Treatment: Concentrates sludge to minimize volume; supernatant is recovered to the pretreatment process for reprocessing.
• Redundancy Design: Multiple redundant pumps ensure system operation even during maintenance or equipment failure.

For pre-treatment filtration systems, visit [pre treatment filtration system].

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4. Project Effect Verification

4.1 Treated Water Quality Test Results

Parameter	Raw Wastewater Value	Produced Water Value	Removal Efficiency
COD	60 mg/L	≤18 mg/L	≥70.0%
BOD₅	30 mg/L	≤9 mg/L	≥70.0%
TSS	40 mg/L	≤1 mg/L	≥97.5%
Turbidity	5 NTU	≤1 NTU	≥80.0%
pH	7.2	7.3	–

4.2 System Operation Performance

• Stability: Continuous 72-hour operation shows treated water quality fluctuation ≤±10%, meeting irrigation standards.
• Recovery Efficiency: System recovery rate reaches 88%, with 8360m³/day of treated water reused for irrigation.
• Energy Efficiency: Optimized pump operation and pressure control reduce energy consumption to ~0.8 kWh/m³ of treated water.
• Sludge Reduction: Sludge concentrator reduces sludge volume by 90%; solid waste output is 320g/day, meeting environmental requirements.
• Reliability: Redundant pump design ensures 99.5% operational availability; no downtime during routine maintenance.

4.3 Compliance and Application

• Standards Compliance: Meets international irrigation water quality standards (FAO) and local environmental regulations.
• Environmental Impact: Reduces freshwater withdrawal by 9500m³/day, conserving water resources and minimizing wastewater discharge.
• Case Validation: Similar systems deployed in municipal wastewater reuse projects achieve 85-90% recovery rates and customer satisfaction ≥96%. For agricultural water purification solutions, visit [agricultural water purification].

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5. Case Corresponding Product Quotation Description

5.1 Main Equipment Quotation (Estimated)

Item	Model	Qty	Unit Price (USD)	Total Price (USD)	Description
9500m³/Day Wastewater Reuse System	HLWW-9500	1	1,850,000	1,850,000	Complete system including pretreatment, UF, RO, sludge treatment, control, and piping
3000m³ Storage Reservoir	–	1	220,000	220,000	Concrete reservoir with lining
70,000m³ Treated Water Reservoir	–	1	480,000	480,000	Storage for irrigation distribution
Total Estimated Project Cost	–	–	–	2,550,000	Turnkey project (equipment, installation, commissioning)

5.2 Terms & Conditions (Estimated)

Term Type	Details
Payment Term	T/T: 30% deposit, 40% during production, 20% before delivery, 10% after commissioning
Lead Time	120 days (design + production + installation)
Warranty	24 months from commissioning; free repair/replacement for non-human-induced failures
After-Sales Support	Free online technical support for 5 years; on-site maintenance available
Operation Training	Free training for 5 operators (1 week on-site)

5.3 Annual Operating Cost (Estimated)

Consumable Name	Specification	Annual Consumption	Annual Cost (USD)
Coagulants	Industrial grade	5,000 kg	15,000
UF Membranes (10% replacement)	–	2 modules	30,000
RO Membranes (10% replacement)	–	3 modules	45,000
Pump Spare Parts	Seals, bearings	2 sets	8,000
Electricity	~0.8 kWh/m³ × 9500m³/day × 365 days × 0.15 USD/kWh	–	416,400
Total Annual Operating Cost	–	–	514,400

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6. Common Questions (FAQ)

6.1 Maintenance and Operations

Q1: How often do UF and RO membranes need to be replaced?A1: UF membranes (3-5 years), RO membranes (4-6 years). Replacement cycles depend on raw wastewater quality and operation intensity. For replacement parts, visit [accessory supporting equipment].

Q2: What is the frequency of sludge disposal?A2: Solid waste (320g/day) is disposed of monthly; sludge thickener requires cleaning every 3 months.

6.2 Warranty and Support

Q1: What is covered under the 24-month warranty?A1: Manufacturing defects in pumps, membranes, control system, and piping. Consumables (coagulants, filters) and human-induced damages are excluded.

Q2: Can the system handle higher wastewater inflow than designed?A2: The 3000m³ reservoir and bypass line (ST-103) allow the system to handle 10% excess inflow; for long-term overcapacity, additional modules can be added.

6.3 System Performance

Q1: How is the system affected by temperature changes?A1: The system is designed for 20-25℃; below 10℃, UF/RO performance may decrease slightly—insulation is recommended for cold climates.

Q2: What happens if wastewater quality deteriorates?A2: The system’s online sensors trigger alarms; the coagulant dosing system automatically adjusts dosage, and the bypass line diverts severely polluted water to avoid membrane damage.

6.4 Environmental Impact

Q1: How much water and energy does the project save annually?A1: Annual water savings: 3.46 million m³; annual energy consumption: ~2.7 million kWh (optimized for energy efficiency).

Q2: Is the treated water safe for all crops?A2: Yes. The treated water meets FAO irrigation standards, suitable for most crops including vegetables, grains, and ornamental plants.

Would you like me to help you create a detailed operation and maintenance manual for this system, including step-by-step startup/shutdown procedures and troubleshooting flowcharts?