Xinxing Pipes Launches Integrated Wastewater Station Upgrade to 13,500 t/d with New Concentrate Reverse Osmosis

Xinxing Pipes Co., Ltd. has released the first environmental impact assessment (EIA) public notice for its wastewater station treatment facility upgrade project, inviting public comment on the retrofitting of facilities at its existing plant north of Shangluoyang village, Wu'an, Handan, Hebei Province.

The project is an expansion and technical retrofit. According to the notice, capacity of the integrated wastewater treatment station will rise from the current 12,000 t/d to 13,500 t/d. Main works include:

• upgrading the existing chemical dosing room;
• renewing the regulating tank and reverse osmosis equipment of the ultrafiltration/RO system and upgrading its automation and control system;
• adding high-density sedimentation and V-type filter treatment units;
• constructing a new concentrate high-density sedimentation tank and concentrate reverse osmosis system;
• upgrading the sludge treatment system and other supporting facilities.

The notice describes the existing works — ironmaking, steel rolling, sintering and pelletising plants plus utilities — served by a 12,000 t/d station using a train of screen + pre-sedimentation + horizontal-flow sedimentation + multi-media filtration + ultrafiltration + reverse osmosis. All treated reclaimed water and concentrate are reused, with no wastewater discharged. Existing emissions of waste gas, wastewater, noise and solid waste are already controlled by effective prevention measures.

While retaining the existing ultrafiltration–RO main line, the retrofit strengthens pretreatment and concentrate handling: the new high-density sedimentation tank and V-type filter improve removal of suspended solids and hardness and hence membrane feed quality, while the new concentrate sedimentation tank and concentrate RO further reduce the volume of RO concentrate — raising plant-wide water reuse and consolidating the "zero discharge" performance.

The project is a typical case of advanced treatment and reuse upgrading for industrial wastewater in the iron and steel sector. Its route of enhanced pretreatment + membrane desalination + concentrate re-concentration matches the current push in steel for water saving, emissions reduction and near-zero liquid discharge.