Integrated Surface Water Treatment Plant

Overview

How it works

Raw water from a river, lake or reservoir is dosed with a coagulant and mixed so that fine particles clump into flocs. The flocs settle in inclined tube modules, where the 60° angle helps solids slide down into the sludge zone. The clarified water then passes through a filter bed of quartz sand and anthracite, which catches the remaining fine particles. Disinfection with sodium hypochlorite or UV follows.

Design values

The plant is designed for raw water with turbidity of 10 to 500 NTU, and the nominal treated water turbidity is 1 NTU or less. The tube settler works at 60°, and the loading rate range is 2.5 to 5 m/h. These are design values, and the real performance depends on your raw water quality, the coagulant selected and operation.

Why a packaged plant

All main treatment steps are built into one skid or tank set, so there is less civil work and installation is faster than with a site-built plant. This suits small towns and rural water stations that need clean water quickly.

Build options

• Daily water demand and the capacity size
• Raw water turbidity range, including flood peaks
• Coagulant and dosing method
• Disinfection method (hypochlorite or UV)
• Scope for pumps, clear water tank and electrical control

Build and installation

We manufacture the plant in our factory and prepare it for shipment. Drawings for foundations and piping are provided, and our engineers can support installation and operator training. Meeting a drinking water standard depends on the source water, the design and the operation, so targets are set in the technical proposal, and verifying with your own tests is recommended.

When this plant is the right choice

This plant is built for rivers, lakes and reservoirs, where the water carries mud, algae and organic matter, and the load changes with rain. The settling step removes the heavy part of the load, so the filters only see what is left and can run for long periods. A packaged unit saves civil work, which is the largest cost in a conventional treatment works.

If your source is clear groundwater with iron or manganese, you do not need the settling stage. Our groundwater plant uses oxidation, filtration and ultrafiltration instead, and is a better fit. For raw water above roughly 500 NTU in flood season, add a pre-sedimentation pond or a larger settling stage, since sudden peaks can overload the tubes. Run a seasonal sampling program before design: the worst month, not the average, decides the coagulant dose and the filter size.