Industry water treatment Content  前前前 Introduction)  工業水流程圖 (Flow diagram industry water)  製程原理 ( Principle manufacturing process)  處理流程 ( procedure treatment) I Introduction  Impurities of Raw water apply process of precipitation to filter :  Need a long time  Require a larger area to treat Economic effectiveness low There for: add chemical medicine  To increase agglutination  Rapid of precipitation faster II 處理流程 ( procedure treatment) Raw water Coagulation flocculation Chemical Storage and Dosing Sedimentation filtration Clean water (WI) storage Sludge Handling 一 Raw Water Pre-treatment Storage Basins Raw Water Basin (250,000m3) III.製程原理  Impurities in Raw water : o Float Solid( Suspension) o Colloid grain o Soluble Solid o Diameter of Suspensions is greater than µm, they able to use gravity effect to remove Soluble Solid depend quantity of moleculer, their diameter less than 10-3µm o Important element in Industry Water is Collid grain, their dimension about 10-3µm~10-1µm 粒徑對沉降速率的影響 Diameter of Order of Size Area Total Surface Time Required to Settle 10 Gravel-rải sỏi 0.487 in2 Course Sand-duong bai cát 4.87 in2 0.1 Fine Sand 48.7 in2 38 sec 0.01 Silt 3.38 ft2 33 0.001 Bacteria 33.8 ft2 55 hr 0.0001 Colloidal Particles 3.8 yd2 230 days 0.00001 Colloidal Particles 0.7 acre 6.3 yr 0.000001 Color Particles 63 yr minimum Particle, mm 7.0 acres 0.3 sec sec  Before treatment, Colloid grain must stable ( distribute), not coagulate, not precipate  There are two factor: Grains in Surface will be absorb to form thin layer Surface of Collid grain exist electric charge Elotrostatic repulsion, Raw water stable SURFACE CHARGE ( 表面電荷 ) COAGULATION Cation Anion S.S Surface Potential Fixed Layer Shear Plane Zeta Potential Potential Distance OH － Al3+/Fe3+ /Fe2+  Distribute Collid use chemical medicine to assist, increase coagulation and flocculation effect This Coagulation effect will be break stability, Floculation effect will be combine small colloid grains to bigger colloid grains  Coagulation use Al2(SO4)3 at rapid mix basin  Flocculation use POLYMER at slow mix basin  After Al2(SO4)3 solubilize in water created positive charge, they asborded negative charge  neutralize electric charge to form small colloid grains Beside, create colloid solid grains It will be combine colloid grains  increase collideing with another  After add POLYMER in water, it formed polymer strip,it able to asborb suspensions, to form colloid polymer, increase volume of colloid easier to precipitate and filter  Firstly small micro flocs formed which agglomerated to form larger macro flocs These macro are easily settled or filtered from the water.Synthentic polymers have replaced inorganic polymer and natural polymer Flocculant dosing is starts until coagulation has been completed 硫酸沉 (20PPM) 原水池 Raw Water Basins 原水沉 液態 POLYMER (20PPM) 逆洗水回收 混凝池 膠羽池 沉殿池 砂濾池 沉水池 Coagulation Flocculation Sedimentation Filtration Clean water 沉泥循環沉 (20 ～ 120M3/Hr) 沉泥輸送沉 (10 ～ 20M3/Hr) 工業水  Use Al2(SO4)3 can reduce alkalinity in water If alkalinity not enough, value PH able to reduce and drop outside work scope Impact of effect medicine  If alkalinity not enough, we are able to add NaOH to balance  Using NaClO able to prevent bacterium…… And prevent harmful for human  Sludge Recycle: Using a recycle of dense sludge , the sludge concentration in the flocculation zone constant 硫酸沉 (20PPM) 液態 POLYMER (20PPM) 逆洗水回收 原水池 Raw Water Basins 工業水沉 原水沉 混凝池 膠羽池 沉殿池 Coagulation Flocculation Sedimentation 砂濾池 沉水池 Filtration Clean water 沉泥循環沉 (20 ～ 120M3/Hr) 沉泥輸送沉 (10 ～ 20M3/Hr) 硫酸沉 (20PPM) 液態 POLYMER (20PPM) 逆洗水回收 原水池 Raw Water Basins 工業水沉 原水沉 混凝池 膠羽池 沉殿池 砂濾池 沉水池 Coagulation Flocculation Sedimentation Filtration Clean water 沉泥循環沉 (20 ～ 120M3/Hr) 沉泥輸送沉 (10 ～ 20M3/Hr)  Rapid mix tank use Al2(SO4)3, use stirrer mix rapidly, to mix even Increase collision among colloid grain and break their stability  Slow mix tank originaly add POLYMER and using Stirrer to mix With purpose create bigger colloid grains from small colloid grains [...]... filtered from the water. Synthentic polymers have replaced inorganic polymer and natural polymer Flocculant dosing is starts until coagulation has been completed 硫酸沉 (20PPM) 原水池 Raw Water Basins 原水沉 液態 POLYMER (20PPM) 逆洗水回收 混凝池 膠羽池 沉殿池 砂濾池 沉水池 Coagulation Flocculation Sedimentation Filtration Clean water 沉泥循環沉 (20 ～ 120M3/Hr) 沉泥輸送沉 (10 ～ 20M3/Hr) 工業水  Use Al2(SO4)3 can reduce alkalinity in water If alkalinity... zone constant 硫酸沉 (20PPM) 液態 POLYMER (20PPM) 逆洗水回收 原水池 Raw Water Basins 工業水沉 原水沉 混凝池 膠羽池 沉殿池 Coagulation Flocculation Sedimentation 砂濾池 沉水池 Filtration Clean water 沉泥循環沉 (20 ～ 120M3/Hr) 沉泥輸送沉 (10 ～ 20M3/Hr) 硫酸沉 (20PPM) 液態 POLYMER (20PPM) 逆洗水回收 原水池 Raw Water Basins 工業水沉 原水沉 混凝池 膠羽池 沉殿池 砂濾池 沉水池 Coagulation Flocculation Sedimentation Filtration Clean water 沉泥循環沉 (20 ～ 120M3/Hr) 沉泥輸送沉 (10 ～ 20M3/Hr)  Rapid...  Flocculation use POLYMER at slow mix basin  After Al2(SO4)3 solubilize in water created positive charge, they asborded negative charge  neutralize electric charge to form small colloid grains Beside, create colloid solid grains It will be combine colloid grains  increase collideing with another  After add POLYMER in water, it formed polymer strip,it able to asborb suspensions, to form colloid