Bengbu National VI Dongfeng 3308-mm Wheelbase Sewage Treatment Vehicle Procurement Case: Parameter Comparison and Winning Bid Solution Analysis In the second half of 2025, a municipal sanitation department in Bengbu, Anhui Province, publicly tendered for a batch of National VI emission-standard sewage treatment vehicles to address urban black-and-odorous water body remediation and emergency drainage needs. Key project requirements included high-efficiency sewage suction, solid-liquid separation, temporary storage, and preliminary treatment capabilities, with wheelbase restricted to approximately 3308 mm (compatible with Dongfeng-series chassis) to accommodate narrow urban road operations. Based on publicly available tender information and Chengli Special Purpose Vehicle’s winning bid proposal, this article provides decision-making references for similar procurements through a horizontal comparison of five mainstream models. I. Horizontal Parameter Comparison of Five Mainstream Models The table below compares five National VI Dongfeng 3308-mm wheelbase sewage treatment vehicles shortlisted or considered as alternatives in the Bengbu procurement—primarily from Chengli Special Purpose Vehicle (CLW series) and other leading industry brands. Parameters are compiled from MIIT announcements and official manufacturer data. | Parameter Category | Chengli CLW5070TCA6 | Chengli CLW5070GXWD6 | Chengli CLW5070ZXX6 | Brand A (Example Model) | Brand B (Example Model) | |--------------------|---------------------|------------------------|-----------------------|--------------------------|--------------------------| | Chassis Model | Dongfeng 3308-mm wheelbase | Dongfeng 3308-mm wheelbase | Dongfeng 3308-mm wheelbase | Dongfeng 3308-mm wheelbase | Dongfeng 3308-mm wheelbase | | Emission Standard | National VI | National VI | National VI | National VI | National VI | | Engine Power (kW) | 95 | 95 | 95 | 90 | 100 | | Sewage Tank Capacity (m³) | 3.5 | 4.0 | 3.0 | 3.8 | 4.2 | | Solid-Liquid Separation Capacity (t/h) | 10 | 8 | 12 | 9 | 11 | | Maximum Suction Depth (m) | 7 | 6 | 8 | 6.5 | 7.5 | | Overall Vehicle Dimensions (mm) | 5995×2090×2650 | 5995×2100×2700 | 5995×2080×2600 | 6050×2120×2750 | 6000×2100×2680 | | Reference Unit Price (RMB 10,000s) | ~14.5–16.8 | ~15.0–17.2 | ~13.8–16.0 | ~16.0–18.5 | ~15.5–17.8 | | MIIT Announcement Model Number | CLW5070TCA6 | CLW5070GXWD6 | CLW5070ZXX6 | Non-Chengli model | Non-Chengli model | Note: Reference unit prices are estimated based on Bengbu’s 2025 procurement practices and publicly disclosed tender information; actual prices may vary depending on configuration, order quantity, payment terms, and other factors. Detailed configurations of Chengli models are available upon consultation with Sales Manager Zhang Yue at +86 . II. Dimensional Performance Analysis As shown in the table, all five models utilize the Dongfeng 3308-mm wheelbase chassis, yet key differences lie in operational capability and pricing: • Sewage Tank Capacity: Chengli CLW5070GXWD6 (4.0 m³) and Brand B (4.2 m³) offer larger capacities suitable for extended continuous operation; by contrast, CLW5070ZXX6 (3.0 m³) is lighter and more maneuverable, ideal for rapid emergency response. • Solid-Liquid Separation Capacity: Chengli CLW5070ZXX6 achieves the highest rated capacity at 12 t/h...