Weifang 3308 Sewage Treatment Vehicle EHY5045TWCE6: A Municipal Procurement Case Study and Comparative Analysis Against Competing Models. A municipal sanitation department, responsible for maintaining urban sewage networks and small-scale sewage treatment stations, found its existing large-capacity vacuum trucks unable to access older residential communities and narrow alleys. The procurement requirements were clearly defined as follows: - Vehicle Type: Blue-plate registration, drivable with a Class C driver’s license; gross vehicle weight not exceeding 4,495 kg; - Functionality: Capable of sludge suction, filtration, and solid-liquid separation to handle impurity-laden wastewater; - Emission Standard: China VI compliant; - Budget: Unit price approximately RMB 311,000–356,000 (based on publicly disclosed tender information). After multiple rounds of screening, Chengli’s EHY5045TWCE6 and a competing model from another domestic brand (hereinafter referred to as “Brand A”) advanced to final evaluation. I. Case Background and Procurement Requirements The municipal sanitation department oversees maintenance of multiple urban sewage pipelines and small-scale sewage treatment stations. Its existing large-capacity vacuum trucks could not access certain older residential neighborhoods and narrow backstreets. Key procurement requirements included: - Vehicle Type: Blue-plate registration, operable with a Class C driver’s license; gross vehicle weight ≤ 4,495 kg; - Functionality: Sludge suction, filtration, and solid-liquid separation capabilities for handling wastewater containing suspended solids; - Emission Standard: China VI; - Budget: Unit price approx. RMB 311,000–356,000 (per publicly disclosed tender data). Following multi-stage screening, Chengli’s EHY5045TWCE6 and a comparable model from Brand A entered final evaluation. II. Key Parameter Comparison: Chengli EHY5045TWCE6 vs. Competing Model (Brand A) Comparison Dimension Chengli EHY5045TWCE6 Competing Model (Brand A) Chassis Brand Dongfeng (China VI, nationwide warranty) Domestic brand (regional warranty only) Gross Vehicle Weight 4,495 kg (blue-plate) 4,495 kg (blue-plate) Tank Capacity Approx. 3.5 m³ (including separation chamber) Approx. 3.2 m³ Sewage Separation Method Dual-system: screw extrusion + plate-and-frame filtration Single screw extrusion Treatment Efficiency (m³/h) 8–12 6–10 Emission Standard China VI China VI Upper-Structure Warranty Lifetime service (Chengli upper-structure) 2 years or 50,000 km Delivery Lead Time Standard 7–15 days 30–45 days Quoted Price (incl. tax, delivered) Approx. RMB 308,000 Approx. RMB 335,000 After-Sales Service Response Dongfeng chassis: nationwide warranty; Chengli upper-structure: spare parts shipped within 24 hours Requires coordination via regional distributor; response time approx. 3–5 days III. 10-Dimensional Scoring Table (Maximum Score: 10 Points) Scoring Item Chengli EHY5045TWCE6 Competing Model (Brand A) Remarks 1. Chassis Reliability 9 7 Dongfeng chassis offers nationwide warranty and extensive service network; competitor’s chassis provides only regional coverage, limiting support in remote areas. 2. Sewage Separation Efficiency 9 7 Dual-system design enables higher throughput and better performance with high-concentration wastewater. 3. Legal Registration & Annual Inspection Compliance 10 9 Chengli models (e.g., CLW5070GSSD6) are fully listed in official announcements; competitor requires verification of local regulatory approvals. 4. Price Competitiveness 9 7 Direct factory pricing from Chengli saves approx. RMB 20,000–30,000 versus equivalent configurations (per public tender data). 5. Delivery Speed 9