For environmental labs, industrial facilities, and wastewater plants: Chemical Oxygen Demand (COD) testing isn't just a number – it's your frontline defense against regulatory fines, process failures, and environmental damage. Yet, reliance on outdated manual titration or basic photometers shackles you with:
High-Risk Delays: 2+ hours per sample for digestion, plus manual analysis, risking permit violations before results arrive.
Operational Burden: Toxic reagents (Hg, Cr), complex workflows, and technician burnout.
Data Doubts: Human error in titration, inconsistent digestion, and poor interference handling compromise results.
Hidden Costs: Reagent waste disposal, constant recalibration, and lost productivity.
Introducing the ERUN-EP7 Advanced COD Tester: Engineered to replace legacy methods with precision, speed, and safety for water professionals.
Scenario | Pain Points of Legacy Methods | ERUN-EP7 Solution Impact |
Wastewater Treatment Plant Compliance | Delayed results cause permit excursions; toxic waste disposal costs surge | Real-time control: Get results fast enough to adjust aeration/chemical dosing. Slash Hg/Cr waste by 90%. |
Industrial Discharge Monitoring | Complex matrices (textile dyes, petrochemicals) interfere with basic photometers | Smart interference correction: Multi-wavelength optics and matrix-specific methods ensure accuracy. |
Environmental Lab Efficiency | Technician time consumed by reflux setups; sample backlog grows | Walk-away automation: Process 50 samples/batch unattended. Free staff for high-value tasks. |
Municipal Sewage Network Audits | Field titration impractical; grab samples degrade during transport | On-site capability: Test COD at manholes/pump stations immediately with portable prep (optional). |
Q: Can it really replace manual reflux for compliance?
A: Absolutely. The ERUN-EP7 complies with:
- ISO 15705(Small sealed tube method)
- US EPA 410.4
- China HJ 828-2017
Pre-loaded methods, automatic calibration, and full audit trails ensure defensible data.
Q: How does it handle high-chloride samples without mercury?
A: Patented chloride-resistant reagents (Hg-free) + automatic compensation algorithms. Validated for seawater/brine up to 10,000 mg/L Cl⁻.
Q: What about oily or turbid samples that clog photometers?
A: Automatic dilution for high-COD samples (up to 5,000 mg/L). Integrated filtration for particulates. No clogging flow cells.
Q: How much time does it actually save per batch?
A: Typical workflow comparison:
Step | Manual Reflux | Basic Photometer | ERUN-EP7 |
Digestion | 120 min | 120 min | 15-20 min |
Cooling | 60 min | 60 min | Auto-cool |
Analysis | 30 min/sample | 2 min/sample | <1 min/sample |
Total (10 samples) | >5 hours | ~4 hours | <1 hour |
Product Core: Automated COD analyzer with integrated digestion, cooling, and colorimetric analysis. Processes 12-50 samples/batch. [Explore Specs]
Feature | Technical Advantage | User Benefit |
Digestion | 165°C ±0.5°C, 30-position reactor | Uniform heating; no hotspots |
Optics | 3-wavelength LED (420nm, 610nm, 700nm) | Automatic turbidity/color compensation |
Range | 5-5,000 mg/L (auto-dilution to 100,000 mg/L) | No manual dilution errors |
Reagents | Pre-filled vials (Hg-free options); barcode tracking | Eliminate handling hazards; full traceability |
Compliance | Full GLP: User/date stamps, calibration logs | Audit-ready reports for regulators |
Throughput | 50 samples in < 2 hours (hands-free) | 5x faster than manual |
1. Textile Manufacturer Cuts Fines by 100%
Challenge: Daily COD excursions (>500 mg/L) caused $120k/year in surcharges. Manual testing delayed corrections by 8+ hours.
Solution: Installed ERUN-EP7 at effluent discharge point. Operators tested hourly and adjusted treatment in real-time.
Result: Zero violations in 18 months. ROI in 6 months via avoided fines. "We fixed problems before regulators knew they existed." – Plant Manager, Bangladesh.
2. Municipal Lab Doubles Productivity
Challenge: 200+ weekly COD samples overwhelmed staff using reflux. 48-hour turnaround caused compliance risks.
Solution: Two ERUN-EP7 units processing 100 samples/day automatically.
Result: Turnaround cut to 4 hours. Staff reallocated to N/P testing. *"We eliminated overtime and reduced reagent costs by 70%."* – Lab Director, Germany.
3. Petrochemical Plant Safeguards Marine Outfall
Challenge: Seawater cooling (high chloride) skewed COD results. Regulators demanded mercury-free testing.
Solution: ERUN-EP7 with Hg-free, high-chloride reagent kits (validated to 10,000 mg/L Cl⁻).
Result: Consistent EPA 410.4 compliance. Eliminated toxic waste disposal. "Accuracy in saline matrices was a game-changer." – EHS Coordinator, UAE.
1. Consultation & Configuration
Discuss your sample matrix, volume, and compliance needs. Select:
- Reagent type (Hg/Hg-free)
- Sample rack size (12/25/50)
- Connectivity (LIMS/Printer)
2. Validation & Training
- On-site method verification with your samples
- Staff training on operation/maintenance
3. Ongoing Support
- Dedicated technical hotline
- Calibration service plans
- Reagent auto-replenishment program
Stop risking compliance with 19th-century chemistry.
The ERUN-EP7 COD Tester delivers:
✅ Defensible EPA/ISO compliance
✅ 90% faster results
✅ 70% lower operating costs
✅ Zero mercury exposure
Request Your Free COD Workflow Audit
Let our engineers analyze your testing process and calculate your potential savings.
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