Government Procurement Case and Bid-Winning Solution Analysis of the Linfen Dongfeng Yizhan-Style Sewage Treatment Vehicle In municipal sanitation equipment procurement, sewage treatment vehicles serve as critical tools for environmental protection initiatives; their selection, cost, and after-sales service directly impact project implementation effectiveness. Recently, the Urban Management Bureau of a district in Linfen City, Shanxi Province, procured a Dongfeng Yizhan-style sewage treatment vehicle to upgrade urban sewage treatment capabilities. Based on publicly available tender information and Chengli Special Purpose Vehicle Co., Ltd.’s actual delivery case, this article analyzes the procurement logic, component costs, and after-sales service plan of this project to provide reference for similar institutions. I. Project Background and Procurement Requirements The Urban Management Bureau of a district in Linfen City launched an urban sewage treatment improvement project in Q4 2025, requiring procurement of one Dongfeng Yizhan-style sewage treatment vehicle. According to local procurement practices, the budget was capped at approximately RMB 845,000, with the following core requirements: • Sewage Treatment Capacity: Minimum daily processing capacity of 100 m³, suitable for municipal domestic sewage and mildly contaminated industrial wastewater. • Chassis Configuration: Dongfeng Yizhan chassis, China VI emission standard; announcement model reference CLW5180GSSD6 (compatible with water-sprinkler chassis), wheelbase 4,500 mm, engine power 180 hp. • Superstructure System: Integrated sewage treatment module including bar screen, sedimentation tank, filtration system, and UV disinfection unit; effluent quality meets Grade I-A discharge standards. • Delivery Timeline: Complete delivery and acceptance within 30 days after contract signing. • After-Sales Service: Nationwide chassis warranty; lifetime technical support and direct-part shipment service for superstructure components. Chengli Special Purpose Vehicle Co., Ltd. won this procurement tender and delivered the Dongfeng Yizhan-style sewage treatment vehicle, which passed acceptance in early 2026 and has since received positive operational feedback. II. Component Procurement Analysis: Consumable Parts List and Cost Control For high-frequency operation equipment such as sewage treatment vehicles, component procurement cost is a key factor in long-term maintenance. For this project, Chengli Special Purpose Vehicle provided a detailed consumable parts list with full price transparency. Key component analyses are as follows: 2.1 Consumable Parts List | Part Name | Function Description | Recommended Replacement Interval | Chengli Direct-Shipment Unit Price (Reference) | |-----------|----------------------|-----------------------------------|-----------------------------------------------| | Sewage Pump (Q = 100 m³/h) | Primary pump for sewage suction | 12 months | ~RMB 3,500/unit | | Stainless Steel Bar Screen Mesh | Captures large particulate impurities | 6 months | ~RMB 800/set | | Sedimentation Tank Scraper Blade | Removes settled sludge | 18 months | ~RMB 1,200/set | | UV Disinfection Lamp Tube | Sterilization and disinfection | 9 months | ~RMB 600/tube | | Silicone Sealing Gasket | Prevents leakage | 24 months | ~RMB 150/set | | Hydraulic Oil Filter Cartridge | Filters contaminants from hydraulic system | 12 months | ~RMB 200/cartridge | | Solenoid Valve Assembly | Controls flow direction switching | 24 months | ~RMB 900/assembly | Table 1: Consumable Parts List and Reference Pricing for Dongfeng Yizhan-Style Sewage Treatment Vehicle (Source: Chengli Special Purpose Vehicle Parts Database) 2.2 Component Price Transparency Chengli Special Purpose Vehicle provided fully transparent component pricing in this procurement. All consumable parts were quoted at market-average prices with no hidden fees. For example, the sewage pump unit price of ~RMB 3,500/unit is approxima