Wuxi Ouyi pitches sludge dewatering system for municipal plants

Wuxi Ouyi Environmental Protection is promoting a multi-disc screw press dewatering line for municipal wastewater plants, with claims of tighter tolerances, lower polymer use and smaller footprint. The company says the setup is designed to cut hauling and disposal costs while supporting retrofit projects in space-constrained facilities.

Why it matters: - Municipal sewage plants depend on sludge dewatering to reduce wet sludge volume before hauling and disposal. - Wuxi Ouyi says its system is aimed at helping plants cut operating costs through lower polymer use, reduced power demand and a smaller equipment footprint. - The company positions the package as a fit for retrofit projects in constrained plant buildings.

What happened: - Wuxi Ouyi Environmental Protection Co., Ltd., based in Yixing, Jiangsu, is marketing its OIDL multi-disc screw press sludge dewatering equipment for municipal wastewater treatment facilities. - The company says the offering is built for continuous dewatering applications and international wastewater treatment projects. - The product package includes a multi-disc screw press main unit, a three-chamber polymer preparation unit, an enclosed shaftless screw conveyor and an intelligent electrical control cabinet. - The company directs engineers and procurement teams to its official international portal for datasheets, installation drawings and factory-direct quotations.

The details: - The OIDL series spans 18 models, from OIDL-131 to OIDL-404, and handles dry solids loads from 10 kg/h to 640 kg/h. - Stainless steel rings are machined to a flatness tolerance of ±0.02 mm to reduce clogging and prevent floc bypass. - The automated chemical preparation unit uses three chambers for dissolving, aging and storage. - The polymer system is designed for 500 to 5,000 L/h capacity and uses continuous dry powder feeding. - The company says the dosing system keeps solution concentration accuracy within ±2% and can save 10% to 20% on polymer costs. - The skid-mounted layout combines electrical controls, flocculation tanks and dewatering bodies in a compact frame. - Wuxi Ouyi says the footprint is about one-third to one-fifth that of conventional filter press buildings. - The shaftless screw conveyor is designed to move dewatered cake directly to disposal bins while controlling odors. - The electrical cabinet uses PLC-based controls, variable frequency regulation, thermal overload protection and liquid-level interlocking. - The screw shafts receive high-velocity oxygen-fuel tungsten carbide coating with claimed microhardness of HV 1300. - The company says the coating delivers four times the abrasion resistance of untreated steel. - The company says each unit undergoes 8 hours of continuous wet-run testing before shipment. - The sourcing package is described as built to ISO 9001 quality management and CE compliance standards.

Between the lines: - The pitch is as much about procurement simplification as it is about machinery performance. - Single-source sourcing reduces integration risk across pumping, polymer dosing, screw press compression and cake conveyance. - The company is using technical claims on precision, wear resistance and automation to differentiate from fragmented, multi-vendor procurement. - Several efficiency and durability claims are company-provided performance statements, not independently verified in the release.

What's next: - Municipal buyers can review technical datasheets, installation drawings and quotations through the company's portal before evaluating specifications against plant flow, space and maintenance needs. - The company is likely to compete on retrofit suitability, chemical savings and lifecycle cost claims as operators compare dewatering options. - Plants considering upgrades will need to validate capacity, footprint and power consumption against their own sludge characteristics and compliance requirements.

The bottom line: - Wuxi Ouyi is packaging sludge dewatering as a turnkey municipal retrofit play: smaller footprint, automated dosing and lower operating costs, backed by a single supplier.