Advanced Nitrobenzene-Aniline Wastewater Treatment: 60% Cost Reduction with Modified Fenton Process

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  • COD
    COD

    Removal Rate:>97%

  • Nitrobenzene
    Nitrobenzene

    Removal Rate:>99%

  • TN
    TN

    Removal Rate:>98%

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

ParameterInfluentEffluentRemoval Rate
COD1,500-2,000 mg/L≤ 50 mg/L> 97%
Nitrobenzene100-150 mg/L≤ 0.3 mg/L> 99%
Color600-900 times≤ 30 times> 95%
TN800-1,200 mg/L≤ 15 mg/L> 98%

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!


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