RAW WATER TREATMENT preciptated SLUDGE REUSE.pptx

surface raw water contains amount of suspended solids as contaiminants .befor using this water it should be treated to remove thes suspended solids.removal of suspended solids using coagulant and coagulate aids in a units called clarifiers . resulting in precipitation of these suspended in the form of sludge inthe bottom of the clarifiers.then the sludge is discharged into the surrounded invironment .in this case we succeded to use this sludge in brack manufacturing process.

1. RAW WATER TREATMENT SLUDGE REUSE

2. RAW WATER TREATMENT SLUDGE REUSE

3. RAW WATER TREATMENT SLUDGE REUSE Before using raw water, it should be pretreated to remove biological and suspended solids contaminants. removal process achieved in pretreatment units called clarifiers and filters . Using coagulants and coagulant aids ,Suspended solids are settled and collected in bottom of clarifiers as sludge ( nearly 1% solid concentration) . Sludge is concentrated in settling thickeners and decanters to around 30% solid concentration .

4. RAW WATER TREATMENT SLUDGE REUSE Majority of these amounts of sludge are discharged to the surrounding environment . Annual amount of treated water = 55.5 billion m3/ year x 15 % = 8.3 billion m3 / year Average Nile water suspended solids 27 ppm Annual amount of settled sludge = 8.3 Billion m3/ y x 27 gm /m3 = 224,100 ton /year 100% solid = 224100 x 3.3 = 739,530 t / year 30% solid

5. RAW WATER TREATMENT SLUDGE REUSE So we are talking about big environmental issue How to solve this problem ? How can we turn this weak point into opportunity ? Is it possible to reuse this sludge ? What are the possible applications ? Red brick industry Cement industry Pottery industry

6. RAW WATER TREATMENT SLUDGE REUSE Many samples were analyzed Sludge analysis is very close to Red brick specifications

7. RAW WATER TREATMENT SLUDGE REUSE Project team awareness and training visit was arranged to red brick factory. A truck of sludge was submitted to the factory for future plant test . a pilot test for red bricks production is currently performed now in PHAROS university laboratory by project team . communication is running with cement production plant in Alexandria to study the possibility of using the sludge in cement industry .

8. RAW WATER TREATMENT SLUDGE REUSE After the successful completion of application tests, business model will be prepared for calculating the economic factors . BUT pleas not the following preliminary facts 1 ton = 2.832 m3 1 m3 of clay = 115 LE (conc. = 80%) 1 m3 of sludge = 43.124 LE (Conc. =30 %) 739,530 t /y x 2.832 x 43.124 LE /m3 = 90,316,704 LE /y Value of discharged waste sludge is more than 90 M LE /y Thank you