In other words, results showed that alum dosage range for good coagulation was almost wide in this study. For pump selection, it is compatible with EPDM, Viton, and all the liquid end materials. The best performance of alum in removing turbidity from water was obtained at pH 7 following by pH 6. Settled Turbidity TOC Removal. 10mg/L Alum Dose, 40.6, Addition of 10mg/l of alum dose removed 13.61% or turbid. 10. When testing samples with only kaolin turbidity the used alum dose ranges from 10 mg/L to 30 mg/L. The benefits of alum are that it is widely available, is proven to reduce turbidity, and is inexpensive. 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. 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%. Aluminium sulfate (alum), the most widely used coagulant in carefully remove the supernat ant from each beaker and de termine the turbidity in each of the samples. It is not normally necessary to … Alum was once the most common coagulant used in West Virginia, but today it is being replaced by the more prevalent use of polymers. Students will graph turbidity and precipitation in Larry's Creek Watershed and identify an area in the graph where turbidity is not caused by rain and is most likely cause by a nearby natural gas drilling leak. Observation Measure the alkalinity, turbidity, and pH of each jar at the end of 30 minutes. 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+). 3) Linear regression of turbidity and optimal dose GRAPH:- Plot a graph between the coagulant dose applied and turbidity of coagulated sample, by taking turbidity value on Y-axis and Alum dose on X-axis; as shown below. Plots of turbidity versus coagulant dose for Water A with alum, Water B with ferric chloride and Water B with alum all showed a continual decrease in turbidity with an increase in coagulant dose. dosage vs. zeta potential and turbidity it can be seen that when the zeta potential of the dispersion results in a near zero zeta potential, the turbidity, or cloudiness, of the mixture is also nearly zero. Optimum removal of turbidity (98%) and dissolved organic carbon (DOC) (70%) was achieved for 100 mg alum L-1 at pH 5. Sample ID, Turbidity (FAU) and Remarks: Tap water, 0.91, Tap water is distilled hence a minimal amount of turbidity. 7 shows the average results of Record all the readings. Determine the optimum alum dose in mg/L as Al and as alum. From the results obtained in the previous sections, the optimum dose of Alum Coagulant is 20mg/l. S. Turbidity Alum PAC % PAC Consumption No. An enhanced coagulation with alum was then conducted by standard jar test to optimize coagulation pH and alum dose. In this technology, guidelines for dose calculation and application are lacking. When applying Aluminum Sulfate, it’s recommended that the pH is between 6.5 and 8.2. 6 Page Exp. 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. Repeat the experiment of Set 1 from steps 1 to 9. 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. Choose the sample with least turbidity and its corresponding coagulant dosage as the optimal coagulant dosage. 800 80 40 50.0 4. Comparative dose to bring down the turbidity to 5 NTU. The optimum alum dosage was lower (1 g L −1) which was the lowest required dosage obtained the highest turbidity removal. Laboratory studies have shown that alum is effective at reducing turbidity and chlorine demand 3 . 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. Alum is the most effective for clearing clay turbidity (general term for describing the cloudiness or muddiness of water) from a pond. Prepare a graph of residual turbidity on the left-hand ordinate and UV254 fraction remaining on the right-hand ordinate versus alum dose. Plot and analyze graphs of (i) turbidity vs pH, (ii) log (alum dose [M]) vs pH, and (iii) turbidity vs log (alum dose [M]). For example, alum reacts to form aluminium-hydroxide floc, Al(OH)3, a gelatinous precipitate. Deter mine the pH of each t reated water sample. Water is drawn from the Delaware River twice daily as the tide flows upriver. Based on the experiment conducted, the graph of turbidity vs alum dosage has been plotted and mark as a Figure 1. 1. 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. More typical storm water turbidity ranges are from 20 to 40 ntu. 0 2 4 6 8 10 12 14 0 20 40 60 80 100 120 140 160 180 Turbidity variations vs Alum coagulant dosage Alum coagulant A Alum coagulant B Coagulant (mg/l) Turbidity (NTU) Figure 2: Variation of turbidity in different jars for both sample, A and B using Alum coagulant. Measure the alkal inity of the sample with the largest alum concentration. Jar tests were performed with and without pH control. Performance vs. Alum Dosage.
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