Introduction

The fine chemical industry faces significant challenges in treating nitrobenzene-aniline wastewater - one of the most stubborn industrial effluents. A breakthrough wastewater treatment upgrade project in Shandong Province has demonstrated how modified Fenton oxidation combined with bioaugmentation can achieve stable compliance while slashing operational costs by 60%. This 300 m³/day retrofit project for a Sinochem subsidiary sets new standards for cost-effective treatment of refractory chemical wastewater.

Project Overview

Challenges in Original Treatment System

The existing Fenton oxidation + contact oxidation process suffered from:

• High treatment costs (original cost: ~47.5 RMB/m³)

• Unstable TN removal (failing to meet ≤15 mg/L standard)

• Excessive chemical consumption

• Poor color removal (600-900 times influent color)

Innovative Treatment Process Design

The upgraded system features:

Modified Fenton Oxidation

• Enhanced oxidation efficiency

• Reduced chemical dosage

• Better color removal

Bioaugmentation Process

• Specialized microbial consortia

• Improved nitrogen removal

• Stable organic degradation

Key Retrofit Benefits

• 60% lower operating costs (19 RMB/m³ vs original 47.5 RMB/m³)

• Simpler operation and maintenance

• Compact footprint (using existing infrastructure)

Performance & Results

Treatment Efficiency Comparison

Economic & Environmental Benefits

• Annual savings: ~310,000 RMB (for 300 m³/day system)

• Reliable compliance with strict discharge standards

• Reduced sludge production versus conventional Fenton

Conclusion

This nitrobenzene-aniline wastewater treatment upgrade proves that advanced oxidation combined with bioaugmentation can solve the dual challenges of treatment efficiency and cost reduction in fine chemical plants. The remarkable 60% cost savings make this wastewater treatment retrofit model particularly valuable for chemical manufacturers facing tightening regulations. For industries seeking sustainable solutions for refractory wastewater, this project offers a proven blueprint combining environmental and economic benefits. 

Contact us today, get free nitrobenzene-aniline wastewater treatment solution!