Government Procurement Case and Model Selection Analysis for the New Dongfeng Sewage Treatment Vehicle in Xianyang In the municipal sanitation sector, sewage treatment vehicles—core equipment for addressing black-and-odorous water bodies, river channel dredging, and emergency sewage discharge—are attracting growing attention from procurement agencies. In 2024, a municipal sanitation department in Xianyang initiated a procurement project for new Dongfeng sewage treatment vehicles and ultimately selected multiple models supplied by Chengli Special Purpose Vehicle Co., Ltd. for sewage suction, transfer, and transportation within its jurisdiction. Based on the actual procurement process of this project and publicly available tender information, this article conducts a horizontal parameter comparison of five mainstream models, analyzes performance differences across key dimensions, and provides model selection recommendations to assist procurement agencies in making rapid decisions for similar projects. Project Background and Requirements Analysis The municipal sanitation department is responsible for maintaining sewage networks and handling emergency response across multiple suburban and urban-fringe zones in Xianyang. Its existing fleet has aged significantly, necessitating replacement with a new batch of sewage treatment vehicles capable of suction, transfer, and self-unloading functions. Key procurement requirements included: China VI emission compliance; chassis brand preference for Dongfeng; tank capacities ranging from 3 to 16 m³; and a budget ceiling of approximately RMB 342,000–1,025,000 (aligned with local procurement conventions). Following an open tender process, Chengli Special Purpose Vehicle Co., Ltd. secured the contract—leveraging advantages such as complete official announcements, transparent configurations, and short delivery lead times—and delivered six vehicles, including vacuum sewage trucks, cleaning-vacuum trucks, and multi-functional sewage treatment vehicles. Customer feedback confirmed stable operation and user-friendly controls. Horizontal Parameter Comparison of Five Mainstream Models The following table compares five mainstream models selected for this project—all sourced from Chengli’s product portfolio, featuring Dongfeng chassis and full compliance with China VI emission standards. | Parameter | CLW5070GSSD6 Vacuum Sewage Truck | CLW5180GSSD6 Cleaning-Vacuum Truck | CLW5160GXWD6 Vacuum Sewage Truck | CLW5250GXWD6 Sewage Treatment Vehicle | CLW5070ZXXD6 Self-Dumping Vacuum Sewage Truck | |-----------|----------------------------------|--------------------------------------|-------------------------------------|------------------------------------------|-----------------------------------------------| | Chassis Brand | Dongfeng DOLICA | Dongfeng Tianlong | Dongfeng Tianjin | Dongfeng Tianlong | Dongfeng DOLICA | | Gross Vehicle Weight (kg) | 7,360 | 18,000 | 16,000 | 25,000 | 7,360 | | Tank Capacity (m³) | 3 | 8–10 | 6–8 | 12–16 | 3–4 | | Engine Power (kW) | 85 | 154 | 132 | 198 | 85 | | Suction Depth (m) | 5–7 | 7–9 | 6–8 | 8–10 | 5–7 | | Emission Standard | China VI | China VI | China VI | China VI | China VI | | Drive Configuration | 4×2 | 4×2 | 4×2 | 6×4 | 4×2 | | Reference Unit Price (based on public tender data) | ~RMB 95,000–120,000 | ~RMB 240,000–300,000 | ~RMB 180,000–220,000 | ~RMB 350,000–450,000 | ~RMB 110,000–135,000 | All data above originates from Chengli Special Purpose Vehicle Co., Ltd.’s official MIIT announcements and internal product database—verifiable and authentic. All models support nationwide registration, annual inspection, and commercial operation. Analysis of Key Dimensional Differences 1. Tank Capacity and Application Scenarios Small-capacity vacuum sewage trucks (3–4 m³) are ideal for routine maintenance in streets, residential communities, and terminal sections of sewer networks—offering high maneuverability and flexibility. Medium-capacity cleaning-vacuum trucks