Government Procurement Case and Working Condition-Matching Solution Interpretation for Dongfeng's New Sewage Treatment Vehicle in Ganzhou In 2025, a municipal sanitation department in Ganzhou launched a special procurement initiative for urban sewage pipeline maintenance, planning to introduce a new Dongfeng-chassis sewage treatment vehicle. The project covers multiple main roads and old residential communities across the city, involving three distinct operating conditions: light-duty municipal, heavy-duty industrial, and special-operation scenarios. Following open tendering and technical proposal evaluation, Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as "Chengli") was selected as the supplier, with equipment delivery completed in the fourth quarter of the same year. Based on this case, this article provides a detailed analysis of model selection logic, parameter matching, and the winning technical solution under each operating condition, offering reference guidance for similar procurement projects. I. Project Background and Operating Condition Analysis The jurisdiction of this municipal sanitation department includes the historic urban core, industrial agglomeration zones, and newly developed districts—featuring complex sewage pipeline infrastructure. Procurement requirements explicitly stipulated that vehicles must support routine cleaning, desilting, and emergency response operations; comply with China VI emission standards; and be capable of navigating narrow streets and performing under heavy-load working conditions. Field surveys identified three representative operating conditions: • Light-Duty Municipal Condition: Streets in the historic urban core are less than 6 meters wide, with relatively small-diameter pipelines (DN200–DN400); operations occur frequently but involve low per-shift workload. • Heavy-Duty Industrial Condition: Pipelines in industrial zones feature larger diameters (DN500–DN800), often containing oil residues and solid sediments, requiring high-capacity vacuum suction and high-pressure cleaning capability. • Special-Operation Condition: In parts of the newly developed district, pipelines are buried deeper than 5 meters, necessitating remote monitoring functionality and emergency drainage capability. During the bidding phase, Chengli leveraged its product database—including official announcement parameters for models CLW5070GSSD6 and CLW5180GSSD6—to develop differentiated technical solutions tailored to each operating condition. II. Working Condition-Matching Solutions and Parameter Comparison Below is the recommended vehicle model and key parameter comparison for each operating condition (data sourced from Chengli’s product database and MIIT official announcements): Operating Condition | Recommended Model | Chassis Model | Tank Capacity | Cleaning Pressure (MPa) | Wheelbase (mm) | Application Scenario ---|---|---|---|---|---|--- Light-Duty Municipal | CLW5070GSSD6 | Water-sprinkling truck (modified for cleaning & vacuum suction) | Dongfeng D6 Series | 3–5 m³ | 8–12 | 3,308 | Narrow streets in historic urban core; routine pipeline cleaning Heavy-Duty Industrial | CLW5180GSSD6 | Cleaning & vacuum suction truck | Dongfeng D9 Series | 8–12 m³ | 15–20 | 4,500 | Large-diameter pipelines in industrial zones; oil-contaminated residue removal Special Operation | CLW5180GSSD6 (Customized version with remote control & emergency pump) | Dongfeng D9 Series | 10 m³ | 20–25 | 4,700 | Deep-buried pipelines; emergency response; remote monitoring Solution Interpretation: • Light-Duty Municipal Solution: Utilizes the Dongfeng D6 chassis with a 3,308 mm wheelbase, ensuring a compact turning radius suitable for narrow alleys in historic urban areas. Tank capacity is limited to 3–5 m³ to avoid overweight issues that could trigger traffic restrictions. According to publicly available tender data, the unit price for such vehicles falls within RMB 98,000–115,000 (aligned with the market pric