Government Procurement Case and Bid-Winning Solution Interpretation of the 3308 Yellow-Plate Sewage Treatment Vehicle in Wuhu City I. Project Background: The Inelastic Demand for Municipal Sewage Pipeline Maintenance In 2024, the municipal sanitation department of a district in Wuhu City, Anhui Province, launched a procurement project for sewage treatment vehicles to address frequent blockages in sewage pipelines and low dredging efficiency in aging residential communities and industrial parks within its jurisdiction. The tender required vehicles capable of simultaneous sludge suction, solid-liquid separation, and preliminary purification—enabling rapid response to routine maintenance and emergency clearance tasks. After multiple rounds of technical parameter comparison and on-site inspections, Chengli Special Purpose Vehicle Co., Ltd. delivered its 3308 yellow-plate sewage treatment vehicle (modified on a Dongfeng chassis; model reference: CLW5070GSSD6, compliant with MIIT announcement parameters). Customer feedback indicated that, following commissioning, the vehicle’s daily operational capacity increased by approximately 40% compared to conventional vacuum trucks, while effectively avoiding secondary pollution. This article uses the above case as a starting point to systematically interpret the core selection logic for sewage treatment vehicles in government procurement—How to select tank volume? How to calculate daily operational capacity? How to control budget? It provides other municipal authorities with a reusable reference framework. II. Core Selection Logic: Matching Volume Requirements—from 3 m³ to 12 m³ One of the key parameters of a sewage treatment vehicle is the effective tank volume, which directly determines single-operation capacity and transfer efficiency. Based on Chengli Special Purpose Vehicle’s product database (covering 946 product lines) and the actual requirements of the Wuhu project, we categorize mainstream tank volumes into four tiers: Table: Chengli Sewage Treatment Vehicle Volume Selection and Operational Capacity Comparison (Referenced from Public Tender Information and MIIT Announcement Parameters) Volume Tier | Chassis & License Plate | Single-Operation Suction Capacity | Daily Operational Capacity (8 Hours) | Applicable Scenarios | Reference Budget (Tax-Inclusive Landed Price) ---|---|---|---|---|--- 3 m³ | Compact Chassis / Blue Plate (C-Class Driving License Required) | ~2.5–3 tons | 8–12 operations/day (~20–36 tons) | Residential septic tanks, small sewage wells | ~¥95,000–¥120,000 (CLW Series Reference) 5 m³ | 3308 Wheelbase / Yellow Plate (B-Class Driving License Required) | ~4–5 tons | 6–10 operations/day (~24–50 tons) | Street-level pipelines, industrial parks | ~¥135,000–¥168,000 8 m³ | Medium Chassis / Yellow Plate (B-Class Driving License Required) | ~6.5–8 tons | 5–8 operations/day (~32–64 tons) | Municipal trunk roads, connections to wastewater treatment plants | ~¥145,000–¥178,000 12 m³ | Heavy-Duty Chassis / Yellow Plate (A-Class Driving License Required) | ~10–12 tons | 4–6 operations/day (~40–72 tons) | Large pumping stations, emergency rescue operations | ~¥198,000–¥245,000 Wuhu Project Selection Analysis: After quantitative assessment, the municipal sanitation department determined a daily sewage processing requirement of ~40–50 tons, with an operational radius within 10 km. Therefore, it selected the 5 m³ volume (3308 yellow-plate) as its primary vehicle type. Rationale: A B-class license suffices for operation—lowering driver qualification thresholds; single-operation suction capacity adequately covers most manholes and pits, minimizing return trips; and the budget remains within ~¥169,000 (based on Chengli’s landed price for equivalent configurations), delivering outstanding cost-effectiveness. III. Daily Operational Capacity Calculation Formula: Scientifically Evaluating Vehicle Efficiency In government procurement, daily operational capacity is a critical metri