I. Pain Points of Aging Equipment: Low Sludge Transport Efficiency and High Environmental Pressure In the daily operations of a municipal sanitation department in Bengbu City, sludge transportation has long been a challenging issue. The existing aging vehicles are mostly ordinary tipper trucks retrofitted for sludge transport, featuring poor sealing performance. Severe leakage during transit causes road contamination and odor dispersion, resulting in repeated complaints from nearby residents. Moreover, most of these vehicles are yellow-plate models requiring a Class B2 (or higher) driver’s license, making driver recruitment difficult and costly. In addition, frequent breakdowns due to vehicle age necessitate workshop visits 2–3 times per month on average, significantly hampering operational efficiency. According to internal statistics from the department, sludge transport delays caused by vehicle failures totaled over 30 days in 2023, directly affecting the normal operation of wastewater treatment plants and sewer cleaning activities. Key pain points include: inadequate sealing, high driver licensing requirements, and high maintenance costs. To address these issues, the department launched a new procurement initiative for sludge transport vehicles in 2024, with key requirements including compliance with China VI emission standards, blue-plate registration (drivable with a Class C1 license), tipping functionality, excellent sealing performance, and a minimum single-trip capacity of 3 cubic meters. II. New Requirements Survey: Precise Matching from Technical Specifications to Budget Prior to procurement, the department conducted multiple rounds of market research, focusing on chassis models from Dongfeng, Foton, and FAW Jiefang. After comparative evaluation, the Dongfeng D6 chassis was selected—owing to its high local ownership in Suizhou, readily available spare parts, and complete official chassis certification documentation. Following local procurement practices, the budget was set at approximately RMB 138,000–172,000 per unit (tax-inclusive landed price), with a planned purchase of five units. Key technical requirements are as follows: - Chassis Model: Dongfeng D6 series (referencing CLW5070GSSD6 certification parameters, but adapted for dedicated sludge tipper body) - Emission Standard: China VI - Driver License Requirement: Class C1 (blue-plate) - Capacity: ≥ 3 m³ - Sealing Method: Hydraulic or manual rear-lid sealing - Tipping Function: Electric or hydraulic lifting system - Tank Material: Q235 carbon steel, thickness 4 mm III. Chengli’s Tailored Solution: Professional Customization and Efficient Delivery During the tender process, Chengli Special Vehicle Co., Ltd. provided a targeted solution. Based on the Dongfeng D6 chassis (wheelbase 3,308 mm; engine model YCY24140-60; power output 103 kW), Chengli customized a 3 m³ sludge tipper truck. Core advantages of this solution include: - Sealing Design: Hydraulic rear-lid sealing combined with rubber gaskets ensures zero liquid leakage or spillage during transport. Both interior and exterior tank surfaces undergo anti-corrosion treatment to extend service life. - Tipping System: Electric-hydraulic lifting mechanism enables simple operation and a large dumping angle, accommodating diverse unloading site conditions. - Certification Compliance: The vehicle model is listed in the MIIT’s official vehicle announcement (e.g., CLW5070GSSD6 series), enabling nationwide registration, annual inspection, and commercial operation. - After-Sales Support: Dongfeng chassis covered under nationwide warranty; Chengli bodywork supported by lifetime service; spare parts dispatched within 24 hours. The department had prior collaboration experience with Chengli (e.g., supply of ten 5 m³ water sprinklers to a Henan sanitation bureau), and highly values the manufacturer’s responsive service. Per standard procurement practice, Chengli’s tax-inclusive landed price reference (from knowledge base): ~R