Modular Wastewater Pumping Station with On-Site Liquid Tank
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Solution Overview
Problem
The existing methods for setting up wastewater pumping stations in wastewater shafts face challenges with high transport costs and logistical difficulties due to bulky and heavy components, particularly the liquid collecting tank, which are often produced as separate assemblies and require complex installation, making it impractical to transport and install over long distances.
Innovation Solution
The method involves prefabricating the solids collecting tank and pump as a construction unit, which is combined with the on-site liquid collecting tank during installation, allowing for a modular design that reduces transport costs and simplifies installation by separating components into site-present and prefabricated parts, with the liquid collecting tank being produced on-site to minimize transport volume and enhance adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the liquid collecting tank is produced as a separate assembly, then maintenance and repair can be performed separately, but the component becomes bulky and heavy, making transport over large distances impractical
Solution Approach 1:
The wastewater pumping station is divided into modular components: a prefabricated unit containing the solids collecting tank and pump, and a separately produced liquid collecting tank. This segmentation allows the heavy liquid collecting tank to be produced on-site, eliminating transport costs, while the lighter prefabricated unit can be easily transported and installed.
2Loss of substance
If the liquid collecting tank is produced on-site, then transport costs are reduced, but the installation process becomes more complex
Solution Approach 1:
The solids collecting tank and pump are prefabricated as a complete operational unit before site arrival. This preliminary action ensures that the complex pump installation is simplified to just connecting the prefabricated unit to the on-site liquid collecting tank, reducing overall installation complexity despite the two-stage production process.
3Power
If large pumps are used to pump wastewater, then pumping capacity is sufficient, but the pump efficiency is low
Solution Approach 1:
The pumping system is segmented into two stages: a solids collecting tank that separates solids from wastewater, followed by a pump that only handles the liquid portion. This segmentation allows the use of a smaller, more efficient pump rather than a large, inefficient single-stage pump, as the pump only needs to move pretreated wastewater without suspended solids.
Solution Approach 2:
Solids are extracted and removed from the wastewater in the solids collecting tank before the pumping stage. This extraction allows the pump to operate on clarified wastewater only, significantly improving pump efficiency and reducing energy loss compared to pumping raw wastewater containing solids.
4Ease of repair
If the solids collecting tank and liquid collecting tank are produced as separate assemblies, then maintenance can be performed separately, but the handling of component parts during transport requires improvement
Solution Approach 1:
The system is segmented into two distinct modules: a prefabricated solids collecting tank with pump assembly, and a separately produced liquid collecting tank. The solids collecting tank assembly is designed as a compact, self-contained unit that is easier to handle and transport than a complete integrated station, while still allowing separate maintenance of both tanks.
Data Source
AI summary
A method for setting up a wastewater pumping station in a wastewater shaft and a wastewater pumping station are provided. At least one solids-collecting tank which separates solids from wastewater containing solids, a liquids-collecting tank which received the treated wastewater from the at least one solids collecting tank, and a pump for emptying wastewater from the liquids-collecting tank via the solids-collecting tank, are produced as separate subassemblies. At least the solids-collecting tank and the pump are prefabricated in the form of a construction unit, and the construction unit is combined with the already on-site liquids-collecting tank during installation in the likewise already on-site wastewater shaft.