Xinjiang Qinghua Energy Group Co., Ltd. Ultrafiltration Membrane Project

Project Background:‌
Located in Yining County, Ili Kazakh Autonomous Prefecture, Xinjiang, Xinjiang Qinghua Energy Group Co., Ltd. is one of China’s coal-to-natural gas enterprises operating with long-term stability. The facility employs advanced wastewater treatment systems, including ‌9 submerged ultrafiltration (SUF) units‌ for biochemical wastewater, ‌3 external pressure ultrafiltration (UF) units‌ for advanced treatment, and ‌3 external pressure UF units‌ for concentrated brine. These systems support the company’s zero-liquid discharge (ZLD) goals through cutting-edge biochemical wastewater treatment technologies.

‌Project Outcomes:‌
Since commissioning, the system has achieved significant results, realizing ‌zero wastewater discharge‌ and maintaining annual freshwater intake at ‌8–9 million cubic meters‌. This dual success reduces operational costs while minimizing water consumption, aligning with sustainable industrial practices.

‌Project Type:‌ Membrane Replacement
‌Influent Sources:‌
Low-temperature methanol washing wastewater, methanol wastewater, phenol-ammonia recovery wastewater, stormwater, floor cleaning water, domestic sewage, and others.
‌Commissioning Date:‌ 2023
‌Process Flow:‌ SUF + UF

‌Technical Performance‌

• ‌Treatment Capacity:‌ 20,000 tons/day

• ‌Membrane Area:‌ 22,190 m²

• ‌Average Flux:‌ 28 LMH

• ‌Effluent Quality:‌ SDI ≤3, Recovery rate ≥90%, Turbidity ≤0.5