Hanqi Environment has successfully commissioned the RO Concentrate COD Stabilization Project at Tianji Group’s final discharge outlet. This retrofit project not only ensures compliant effluent discharge but also resolves COD degradation inefficiencies caused by salt accumulation in the client’s zero liquid discharge (ZLD) system. The owner praised the solution as "technically robust and operationally reliable" for its seamless process integration and space optimization.

Retrofit Challenges Addressed:
• Extremely limited footprint
• Minimal available hydraulic head (≤0.8m)

Hanqi’s Solution:
Deployed third-generation Ozone Fluidized Bed Technology featuring:
✓ Compact steel-structure design embedded between existing units
✓ Gravity-flow operation utilizing original hydraulic head (zero additional pumping)
✓ 16-minute retention time (industry-leading efficiency)

Performance Results:
➤ COD consistently reduced to <25 mg/L
➤ Ozone mass transfer efficiency increased by 3.2x
➤ Salt-induced COD degradation eliminated

Partnership Legacy:
Since 2015, Hanqi has provided Tianji Group with:

• Fluoride pretreatment

• Process water conditioning

• Advanced effluent polishing
  This latest achievement establishes a replicable technical pathway for coal chemical industry upgrades, delivering measurable environmental and economic benefits.