Plot a graph with alum dosage along x-axis and turbidity along y-axis. Diminishing improvement in turbidity removal was observed for coagulant doses above 15 mg / L alum for both 100 and 500 NTU. This trend is a sign that sweep flocculation is the main coagulation mechanism occurring. USALCO Aluminum Sulfate (Alum), is a high quality, iron-free, clear solution that meets the specifications of the American Water Works Association Standard B403-16 and complies with the requirements of NSF/ANSI/CAN 60 at a maximum dosage of 150 mg/L. 7. Alum is the most effective for clearing clay turbidity (general term for describing the cloudiness or muddiness of water) from a pond. 1). It is not normally necessary to … Measure the alkal inity of the sample with the largest alum concentration. 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. For pump selection, it is compatible with EPDM, Viton, and all the liquid end materials. Jar tests were performed with and without pH control. Sample ID, Turbidity (FAU) and Remarks: Tap water, 0.91, Tap water is distilled hence a minimal amount of turbidity. Coagulation in combination with flocculation and sedimentation 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. 800 80 40 50.0 4. 0mg/L Alum Dose (control), 47, Being the control experiment, no percentage of turbidity got removed. 2. Aluminum sulfate (Al 2 (SO 4) 3 or alum): Aluminum sulfate (commonly called alum) is used as a coagulant, causing colloidal particles to clump together and settle out of the water. When applying Aluminum Sulfate, it’s recommended that the pH is between 6.5 and 8.2. However, optimum coagulation occurs when Based on the experiment conducted, the graph of turbidity vs alum dosage has been plotted and mark as a Figure 1. From the graph patterns obtained in first trail of jar test, it Residual Aluminium with PAC/alum. It show that the minimum turbidity which is 0 NTU happen two time. ♦ less sludge is produced compared to alum at an equivalent dose, ♦ lower doses are required to give equivalent results to alum. NTU mg/L mg/L against % Alum Consumption 1. 6 Page Exp. 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 At an influent turbidity of 100 NTU, effluent turbidity was strongly correlated with coagulant dose at coagulant doses of 1 to 7.5 mg / L alum. Select the optimum dosage on the basis of supernatant clarity and settleability of floc with secondary considerations to cost and sludge production. In this technology, guidelines for dose calculation and application are lacking. Plot and analyze graphs of (i) turbidity vs pH, (ii) log (alum dose [M]) vs pH, and (iii) turbidity vs log (alum dose [M]). An enhanced coagulation with alum was then conducted by standard jar test to optimize coagulation pH and alum dose. alum in removing turbidity from water was obtained at pH 7 following by pH 6. Analysis of zeta potential vs. coagulant dosage results are used to evaluate the effectiveness of various chemicals (typical examples are PACl and ACH had similar percent removals for color and turbidity achieving consistent percent removals of 95% and 45%, respectively, but PACl was less effective than ACH at removing organics. Present all data in tabular format. Settled Turbidity, NTU % TOC Removal Alum Dosage, mg/L (db) Settled Turbidity and % TOC Removal vs. Alum Dosage. 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%. Alum dose and pH control of coagulation were found to be important factors governing DOM removal. Laboratory studies have shown that alum is effective at reducing turbidity and chlorine demand 3 . In bulk water treatment, the jar tests are repeated with varied alum dose until the ideal dose … Alum dosage typically in the 10 – 60 PPM range depending on the results of the Jar test, Flow and turbidity measurement can be used to adjust dosage of the Alum. The application is usually a few hundred pounds per surface acre. Performance vs. Alum Dosage. Settled Turbidity TOC Removal. 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