Waste Sulfuric Acid Refining Project: 200 TPD, COD Reduced from 30,000 ppm to Below 1,000 ppm
August 24, 2026
Project Background
A leading chemical manufacturer faced a growing environmental and operational challenge: its production lines generated a steady stream of by-product waste sulfuric acid. With strict discharge regulations tightening across the industry, the company needed a reliable, cost-effective solution to treat and recover this waste acid rather than pay rising disposal fees.
Project Challenges
The waste sulfuric acid presented multiple treatment difficulties:
- Extremely high organic load with a raw liquid COD of 30,000 ppm
- Deep black coloration caused by organic impurities and suspended solids
- Relatively low acid concentration ranging from 27% to 40%
- Large daily volume requiring a processing capacity of 200 tons per day
Conventional neutralization would have consumed enormous quantities of alkali and produced massive amounts of hazardous sludge, making direct disposal both environmentally unacceptable and economically unsustainable.
Our Solution
We designed and delivered a complete waste sulfuric acid refining system tailored to the customer's specific feed characteristics. The treatment train combines oxidation, coagulation, and advanced purification stages to break down organic contaminants and restore the acid to a clean, reusable condition.
Key features of the system include:
- Customized oxidation module capable of degrading high-concentration organic pollutants
- Multi-stage solid-liquid separation to remove suspended solids and color bodies
- Continuous automated operation designed for 200 tons per day throughput
- Modular skid-mounted layout for easy installation and future expansion
Technical Parameters
| Parameter | Value |
|---|---|
| Processing capacity | 200 tons/day |
| Raw liquid COD | 30,000 ppm (black) |
| Sulfuric acid concentration | 27% - 40% |
| Effluent COD requirement | < 1,000 ppm |
| Effluent appearance | Colorless and transparent |
Results & Benefits
After system commissioning, the refining plant consistently met and exceeded all treatment targets:
- COD reduced from 30,000 ppm to below 1,000 ppm, a reduction rate of over 96%
- Effluent acid turned colorless and transparent, suitable for downstream reuse
- Recovered sulfuric acid can be recycled back into production, cutting raw material costs
- Significant reduction in hazardous waste disposal volume and associated costs
- Full compliance with local environmental discharge and recycling requirements
Why Choose Us
This project demonstrates our capability to handle complex, high-strength industrial waste acid streams. From laboratory testing and process design to equipment manufacturing, installation, and commissioning, we provide turnkey solutions backed by years of experience in chemical wastewater and waste acid treatment.
If your facility generates by-product sulfuric acid or faces similar treatment challenges, contact us today to discuss a customized solution for your site.