https://www.water-technology.net/projects/bootawadamwatertreat/ 060622 Bootawa Dam Water Treatment Plant…. Treatment Water received at the WTP passes through the filtration area consisting polymer membrane filters. The fine straw-like fibres remove tiny impurities that are less than 0.2µ in size. The membranes also remove micro-organisms such as cryptosporidium and giardia. 1. Water is filtered through plastic fibres to remove impurities like microorganisms e.g., giardia ( a parasite found in faeces that causes diarrhea). Use of polymer membranes eliminates the need to add chemicals to water. The filters are backwashed every 30 minutes and the backwashed water is fed back into the plant for processing. 2. Filters are backwashed to keep them clean. Filtered water is sent to the sealed ozone contact tank, which removes any compounds produced by algal blooms. Presence of such compounds can cause taste or odour problems. Treating with ozone also helps disinfect the water. 3. The filtered water is then treated with ozone which disinfects the water removing toxins from algae. Water is then passed through the biologically activated carbon (BAC) filter, which consists of activated carbon. This absorbs any final contaminants present in the water and removes residual tastes or odours. 4. The treated water is then put through another filter – a BAC (biologically activated carbon) filter that absorbs remaining impurities. The final step in the treatment process is feeding the water into the chlorine contact tank. Chlorine is added to water in the tank to remove any remaining bacteria. Small traces of chlorine are left to ensure that water remains bacteria free until it reaches consumers. 5. Chlorine is added to remove the remaining bacteria. The treated water is then sent to the treated water reservoir where small quantities of soda ash and fluoride are added. Soda ash is added for pH correction and fluoride is added for dental health. 6. Soda ash is added to correct the pH (acidity) and fluoride is added for dental health. Bootawa Dam Water Treatment Plant…. Treatment of drinking water 1. Water is filtered through plastic fibres to remove impurities like microorganisms e.g., giardia ( a parasite found in faeces that causes diarrhea). 2. Filters are backwashed to keep them clean. 3. The filtered water is then treated with ozone which disinfects the water removing toxins from algae. 4. The treated water is then put through another filter – a BAC (biologically activated carbon) filter that absorbs remaining impurities. 5. Chlorine is added to remove the remaining bacteria. 6. Soda ash is added to correct the pH (acidity) and fluoride is added for dental health. Source: https://www.water-technology.net/projects/bootawadamwatertreat/ 060622 Source: midcoast.nsw.gov.au Drinking Water Quality Management System pdf
