Case Study and Winning Bid Analysis: Linyi’s Dongfeng D6 Sludge Tipper Truck (Blue License Plate, 3 m³) for Government Procurement. As urban sewage treatment efficiency improves, sludge transportation has become a critical task for municipal sanitation departments. Recently, a municipal sanitation authority publicly tendered for a batch of blue license plate, 3 m³ sludge tipper trucks to meet sludge removal requirements from local wastewater treatment plants. This case study—set against the backdrop of Linyi’s procurement—focuses on the Dongfeng D6 chassis, offering an in-depth comparison of fuel-powered versus battery-electric versions in terms of cost, operational suitability, and charging infrastructure requirements, while also detailing Chengli Special Purpose Vehicle’s winning bid solution. I. Case Background and Procurement Requirements According to publicly released tender information, the municipal sanitation authority plans to procure 3–5 units of blue license plate, 3 m³ sludge tipper trucks for daily sludge transfer operations handling approximately 15–20 tons. The sludge moisture content is about 80%, requiring vehicles with sealed, leak-proof bodies and easy-clean features, capable of operating efficiently on narrow urban roads. The procurement budget is capped at approximately RMB 660,000 (based on local procurement conventions). The tender documents explicitly require: (1) Chassis compliant with China VI emission standards; (2) Superstructure equipped with hydraulic tipping functionality; and (3) Full vehicle type-approval certification enabling normal registration and annual inspection. During preliminary research, the authority compared brands including Dongfeng, Foton, and Jiefang, ultimately selecting the Dongfeng D6 chassis due to its superior load capacity and maintenance convenience among blue license plate models. II. Cost Comparison: Fuel-Powered vs. Battery-Electric Versions Driven by national new-energy policies, the authority simultaneously evaluated the applicability of both fuel-powered and battery-electric sludge tipper trucks. The following comparison is based on Chengli Special Purpose Vehicle’s proposed solutions (referencing MIIT-approved parameters, e.g., CLW5070GSSD6 series): Comparison Item Fuel-Powered Version (Dongfeng D6 Blue License Plate, 3 m³) Battery-Electric Version (Same Capacity Configuration) Official Suggested Price (Based on Public Tender Data) Approx. RMB 98,000–115,000 Approx. RMB 250,000–320,000 (post-battery subsidy) Annual Energy Cost (40 km/day × 300 days/year) Approx. RMB 12,000 (diesel @ RMB 7/L) Approx. RMB 3,000 (electricity @ RMB 0.6/kWh) Annual Maintenance Cost Approx. RMB 5,000 (engine + after-treatment system) Approx. RMB 2,000 (battery cooling system + motor) Total 5-Year Cost (Purchase + Energy + Maintenance) Approx. RMB 205,000 (98,000 + 60,000 + 25,000) Approx. RMB 305,000 (250,000 + 15,000 + 10,000) Refueling/Recharging Time 5 minutes Fast charge: 1.5 hours; Slow charge: 6 hours Driving Range ~300 km on full tank ~120 km on full charge (real-world conditions) Note: Prices above are reference figures derived from public tender data; actual transaction prices may vary depending on configuration and regional subsidy policies. For reference, the market price range for blue license plate, 5 m³ water-sprinkler trucks (Dongfeng D6) is RMB 108,000–127,000 (per Chengli’s internal knowledge base); accordingly, 3 m³ sludge tipper trucks fall within a lower price band of approx. RMB 108,000–127,000. From a cost perspective, the fuel-powered version offers significantly lower acquisition cost and a total 5-year cost of ~RMB 205,000. Although the battery-electric version saves energy costs, its high upfront investment results in a total 5-year cost of ~RMB 305,000. Without government charging infrastructure subsidies, the battery-electric option holds no clear advantage over the 5-year lifecycle. III. Operational Scenario Differences and Charging