Government Procurement Case and Selection Solution Interpretation for the New Dongfeng Sewage Treatment Vehicle in Changzhou: A municipal sanitation department recently completed the procurement of new Dongfeng sewage treatment vehicles, with a total budget controlled within approximately RMB 396,000, and a unit price of around RMB 180,000 (based on publicly announced tender information). A total of five sewage treatment vehicles were delivered under this project, primarily intended for sewage suction and transportation in urban streets and industrial parks. Based on this case, this article interprets how to efficiently match practical requirements through comparative analysis of parameters and model selection across five mainstream models. The procuring entity initially faced key challenges including outdated equipment with low suction efficiency and inability to handle sewage of varying viscosities. After multiple rounds of technical evaluation, the entity ultimately selected the Dongfeng-chassis sewage treatment vehicle supplied by Chengli Special Purpose Vehicle Co., Ltd. As one of China’s largest special-purpose vehicle manufacturers, Chengli maintains 946 product specifications covering 44 categories; its fully certified models (e.g., CLW5070GSSD6) are widely deployed in municipal applications. Comparative Parameter Table of Five Mainstream Models The table below compares five mainstream sewage treatment vehicle models involved in this project. Data sources include MIIT (Ministry of Industry and Information Technology) official announcements (e.g., CLW5070GSSD6, CLW5180GSSD6) and Chengli’s internal product database. Key parameters covered include tank capacity, suction depth, chassis type, and emission standard—enabling procurement personnel to rapidly identify suitable options. | Model | Chassis Brand | Tank Capacity (m³) | Suction Depth (m) | Emission Standard | Reference Price (RMB 10,000s) | |-------|----------------|----------------------|---------------------|-------------------|------------------------------| | CLW5070GSSD6 | Dongfeng | 3 | 6 | China VI | ~9.5–12 | | CLW5110GSSD6 | Dongfeng | 5 | 8 | China VI | ~13.5–16.8 | | CLW5180GSSD6 | Dongfeng | 8 | 10 | China VI | ~14.5–17.8 | | CLW5250GSSD6 | Dongfeng | 12 | 12 | China VI | ~19.8–24.5 | | CLW5310GSSD6 | Dongfeng | 15 | 15 | China VI | ~24–29.8 | Note: Prices reflect Chengli’s 2026 tax-inclusive landed prices; actual quotations may vary depending on configuration and regional policies. For precise quotations, please call . Multi-Dimensional Comparative Analysis As shown in the table, the five models exhibit stepwise differences in tank capacity, suction depth, and price. Key differentiating factors are as follows: 1. Tank Capacity vs. Operational Efficiency A 3 m³ tank (e.g., CLW5070GSSD6) suits narrow streets or intermittent operations but requires frequent discharge during continuous suction. In contrast, a 15 m³ tank (e.g., CLW5310GSSD6) is ideal for industrial parks or large-scale sewage ponds, enabling significantly higher single-operation volume. In this case, Changzhou’s street maintenance units selected the 8 m³ and 12 m³ models to strike an optimal balance between maneuverability and operational efficiency. 2. Suction Depth vs. Application Scenarios Suction depth ranges from 6 m to 15 m. The CLW5070GSSD6’s 6 m depth suffices for standard sewer systems, whereas the CLW5310GSSD6’s 15 m depth accommodates deep-pit sewage. Feedback from a district urban management bureau indicated that the 8 m³ model—with its 10 m suction depth—proved highly effective during renovation projects in aging residential communities.