Coagulants r recove very f from wa wate ter wo works wa waste: - PowerPoint PPT Presentation

Coagulants r recove very f from wa wate ter wo works wa waste: sustainable im sustainable implementation challenges plementation challenges Prof. Dr. Taha M. A. Razek EIA Consultant Hazardous Waste Management and Treatment Consultant Vice Dean for Environment Service and Society Development Institute of Environmental Studies and Research, Ain Shams University, Cairo, Egypt

Contents  Intr Introduction. oduction.  Pr Problem stat oblem statement and ement and Study objectiv Study objectives. es.  Experimental se Experimental setup. tup.  Results and sults and discussion. discussion.  Conclusion. Conclusion. NAXOS 2018 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018 2

Introduction SL SLUDGE UDGE Aluminum + Biological Load Aluminum + Biological Load + organic matt + organic matter + TSS + TSS The Nile The ile Riv iver er represents represents 85% 85% of the he drinking drinking 85% 85% water production duction Surface Sur ace wat ater er treatment treatment wast stes es Aluminum Aluminum sludge sludge NAXOS 2018 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018 3

Introduction ■ Man Many harmful im harmful impacts ha pacts have been recor been recorded ed regar regarding the aluminum sludge disposal ing the aluminum sludge disposal in the f fresh wa h water wa ways. ■ The major im The major impacts repor pacts reported w ed were biological re biological bur burden which sho en which shows a s a great alt great alteration t ration to the aq the aquatic uatic en envir vironme nment. t. ■ Other organic Other organic and and inorganic contaminants f inorganic contaminants found in und in the sur the surface w ace water are r are concentrat concentrated and ed and accumulat accumulated thr d throughout the treatme ughout the treatment pr t process and ocess and dispose disposed t to the w the water w r ways in ys in localized places within aluminum sludge. localized places within aluminum sludge. ■ In In Egypt, it is Egypt, it is highly needed t highly needed to f find out nd out a a solution t solution to aluminum sludge handling and aluminum sludge handling and the increased costs of w the increased costs of water treatment and r treatment and supply supply. NAXOS 2018 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018 4

Introduction Human Human is affect ected indirectly indirectly with with the the pollution ollution thr through ugh sludge. ludge. River Bio Riv iota ta is is also also badly badly The The cost ost of the he affect af cted ed with with the the drinking drinking water pollution pollution thr through ugh sludge ludge production pr oduction increases increases disposal. disposal. continuously continuously NAXOS 2018 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018 5

Introduction ■ Although, Aluminum com Although, Aluminum compounds f ounds found naturally und naturally in in nature and nature and are relativ are relatively stable ly stable com compounds in ounds in the en the envir vironment par nment particularly in icularly in neutral pH neutral pH values, recent lit lues, recent literature rature repor reported aluminum accumulation in ed aluminum accumulation in biolog biological tissues especially when conjugat ical tissues especially when conjugated ed with organic com with organic compounds. ounds. ■ High amount of suspended matt High amount of suspende d matter is intr er is introduced t oduced to the sur the surface w ace water which cause r which cause dist distortion in tion in the pathw the pathway of the Nile Riv y of the Nile River and r and its tributaries its tributaries. ■ Sustainability concept collects three di Sustainability concept collects three different pillar erent pillars (Econom (Economy, Society and , Society and Envir En vironme nment) t t) to achie achieve justice betw e justice between generations. n generations. ■ In In Egypt, The repeat Egypt, The repeated disposal of w d disposal of water treatm r treatment w ent wast stes in es in the Nile Riv the Nile River and r and its its tributaries threa tributaries threaten the sustainability of w en the sustainability of water treatme r treatment industr t industry in in Egypt. Egypt. NAXOS 2018 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018 6

Problem statement and study objectives Wa Wasted s sludge Aluminum Sulf Aluminum Sulfat ate Water pr r production oduction 27,000,000 ,000,000 1200 1200 250,000 250,000 m 3 /Da /Day To Tons/Day m 3 /Da /Day NAXOS 2018 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018 7

Problem statement and study objectives ■ The resear The research t team am has studied the pr has studied the prob oblem of lem of alumin aluminum um w wast ste handling in e handling in Egypt and pr Egypt and proposed a oposed a solution that solution that could solv could solve the three dimensions and e the three dimensions and pillars (econom pillars (economy, social and en , social and envir vironmenta nmental) of l) of the sustaina the sustainability of bility of drinking drinking wa water p production. ■ The solution is thr The solution is through the reco ugh the recovery of of aluminum aluminum sulf sulfate fr from sludge w om sludge wast ste e and reuse it again t and reuse it again to treat the sur treat the surface w ce water and pr r and produc oduce drink e drinking w ng water. ■ Some obstacles ha Some obstacles have limit limited the sustai d the sustainabilit bility of the aluminu of the aluminum sulf sulfate recovery fr reco from sludge but right om sludge but right no now th w the authors are w e authors are working on solving it. ing on solving it. ■ One of the major challenges f One of the major challenges faced the ced the re rese sear arch in that are ch in that area is is organic organic matt matter accumulation in the reco er accumulation in the recovered red solutions that is solutions that is transf transferred t erred to the the treat treated w d water in the f r in the form of rm of THMs. THMs. NAXOS 2018 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018 8

Problem statement and study objectives Coagulants Reco Coagulants R covery fr from om Sludge Sludge Pollutants llutants Accumulation ccumulation Sustainable Sustainable Implementation Im plementation and Operation and Operation NAXOS 2018 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018 9

Problem statement and study objectives Ev Evaluati aluation on of of alum aluminu inum sulf sulfat ate reco recover ery using sing acidificati acidification. n. Performing orming aluminum aluminum coagulant coagulant reco recover ery using sing optimum optimum conditi conditions. ns. Charact Characterization rization and and quantification uantification of the he recovered reco ered coagulants coagulants Applying Applying seq sequential ential coagulants coagulants reco recover ery. Characterization Charact rization of of the the reco ecovered ered coagulant coagul ants and and treat reated ed water. NAXOS 2018 10 6 Th International Conference on Sustainable Solid Waste Management 13-16 June 2018

Experimental setup Dif Different erent fact actors rs af affecting cting aluminum luminum sulf ulfate reco recovery fr from om sludge sludge was studied tudied to det determine rmine the he optimum optimum values alues (Sludge Sludge weight ight – tem emperature perature – rotational ational speed peed – acid cid concentration – acid concentration acid /sludge /sludge ratio) atio) to achie chieve the the maximum aximum aluminum aluminum sulfat sulfate production pr oduction fr from om sludge. sludge. Optimum fact Optim actors rs were re applied applied and nd coagul coagulant ant solut olution ion was as prepare prepared. Characterization Charact rization and and quantification uantification of the he reco recovered ered coagulant coagulant from the he sludge. sludge. Seq Sequentially entially repeat repeated ed coagulant coagulant reco recover ery was as per performed ormed using using jar ar te tester. Me Metals tals concentration concentration were ere analyzed nalyzed in the he reco recovered red aluminum luminum sulf ulfate and and a com comple lete water analysis nalysis for or the the treat reated wat ater er was per erformed. rmed. NAXOS 2018 11 6 TH International Conference on Sustainable Solid Waste Management 13-16 June 2018