150 35 25 71.4 2. 7. Alum was once the most common coagulant used in West Virginia, but today it is being replaced by the more prevalent use of polymers. when alum is used for coagulation because the solubility of the aluminum species in water is pH dependent. Prepare a graph of residual turbidity on the left-hand ordinate and UV254 fraction remaining on the right-hand ordinate versus alum dose. It is not normally necessary to … Repeat steps 1-10 with higher dose of alum, if necessary. Settled Turbidity TOC Removal. Sample ID, Turbidity (FAU) and Remarks: Tap water, 0.91, Tap water is distilled hence a minimal amount of turbidity. 2. If the pH of the water is between 4 and 5, alum is generally present in the form of positive ions (i.e., Al(OH)2+, Al8(OH)4+, and Al3+). It happen when the amount of 60ml and 100ml of Al 2 SO 4 is added. Performance vs. Alum Dosage. For example, a dose of 12 mg/L PACl (as 100%) was required for treatment of a coloured, low turbidity water (Otway region, Victoria) compared to similar performance obtained when using an alum dose of 55 mg/L, and It show that the minimum turbidity which is 0 NTU happen two time. 3) Linear regression of turbidity and optimal dose Residual Aluminium with PAC/alum. Coagulation in combination with flocculation and sedimentation Mixing Alum with water about 8.2 can be toxic to fish. With each optimal final turbidity and dose of coagulant obtained, the correspondent graph was made in order to analyze the results to determine if the data presented a linear behavior, which was determined by the use of a linear regression. Alkalinity Measurement 1. Deter mine the pH of each t reated water sample. Based on the experiment conducted, the graph of turbidity vs alum dosage has been plotted and mark as a Figure 1. 4.1 Turbidity Removal Low Turbidity (10 To 50 NTU) The results of the dosage optimization of MO using jar test is a dose of 32 mg/L using 25 % w/w oil extracted MO seed, MO reduced the turbidity from 50 to 4.3 NTU, corresponding to a turbidity removal of 91.4%. The required alkalinity may be naturally present in the water or it has to be added through dosage of lime, Ca(0H)2 or sodium carbonate, Na2CO3 (also called soda ash). Observation With the concentration range of “alum” from 5mg/l to 100 mg/l, it is giving percentage turbidity removal above 87% for all of those concentrations. 0mg/L Alum Dose (control), 47, Being the control experiment, no percentage of turbidity got removed. For pump selection, it is compatible with EPDM, Viton, and all the liquid end materials. The coagulation efficiency of alum remained almost constant within the dosage range of 10 to 40 mg/L at pH range of 4-8 (Fig. However, optimum coagulation occurs when Select the optimum dosage on the basis of supernatant clarity and settleability of floc with secondary considerations to cost and sludge production. In bulk water treatment, the jar tests are repeated with varied alum dose until the ideal dose … 44 21 Alum and Lime Dosage vs. Cationic Polymer Dosage - Seattle Pilot Plant 47 22 Seattle Pilot Plant Preferred Chemical Treatments - Alum Plus Cationic Polymer 47 23 Catfloc T-l Dosages and Turbidity - Seattle Pilot Plant 48 24 573 C Dosages and Turbidity - Seattle Pilot Plant 51 25 Comparison of One vs. ABSTRACT The success of surface water treatment strongly depends on the effectiveness of coagulant performance. 550 40 35 87.5 3. carefully remove the supernat ant from each beaker and de termine the turbidity in each of the samples. 1. alum in removing turbidity from water was obtained at pH 7 following by pH 6. For good coagulation the optimal dose of coagulant should be fed into the water and 6-Discussion: Coagulation units require precise dosage control in order to remain effective. 11. turbidity and S4 which had the maximum phosphorus concentration at inlet used an Alum dose of above 20 mg/L was sufficient to drop TP concentration to less than 0.025 mg/L. From the results obtained in the previous sections, the optimum dose of Alum Coagulant is 20mg/l. When testing samples with only kaolin turbidity the used alum dose ranges from 10 mg/L to 30 mg/L. #4 Alum dose and pH control of coagulation were found to be important factors governing DOM removal. 0 10 20 30 40 50. Choose the sample with least turbidity and its corresponding coagulant dosage as the optimal coagulant dosage. S. Turbidity Alum PAC % PAC Consumption No. Add 50 mL of water samp le (Vs) to an erlenmeyer flask 2. 6 Page Exp. The river is a stable raw water source with a low average incoming turbidity of 6.0 ntu. 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