Sydney Water Eastern Sewerage Treatment Plant Site Report

1168 Words Sep 5th, 2014 5 Pages
Melbourne Water Eastern Sewerage Treatment plant Site Report
There are several different technologies used at the Eastern Treatment Plant for treating sewerage until it becomes Class A treated effluent. An overview of the process can be seen in Figure 1 below: Figure 1: A schematic diagram showing the overall sewerage treatment process (Melbournewater.com.au nd.)

Grit filtration is used to begin the removal of some solids and large objects and rubbish that end up in sewerage such as plastics, condom wrappers and toys by passing the water through two filters (Melbournewater.com.au nd.). Sedimentation and flocculation collection begins the remove solids as they settle out under very still conditions and hydrophobic components which are gently collected off the surface. Nitrogen removal occurs in a series of anaerobic and aerated ponds to induce denitrification (Melbourne Water 2014). Clarification removes a majority of suspended particles reducing the turbidity of the water (Melbournewater.com.au nd.). This is followed by tertiary treatment including ozone treatment to reduce bacteria so that biological filtering can occur effectively (Melbournewater.com.au nd.). This is followed by disinfection with ozone, UV light and chlorine (Melbourne Water 2014). The treated water is then class A and is either taken to outfall or used for non ingestive purposes (Melbourne Water 2014). The sludge collected is digested to break some of it down (Melbourne Water 2014). This process…
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