To conduct jar test on a natural surface water in order to estimate an optimum dosage of aluminum sulfate or ferric sulfate for the removal of suspended matter , To observe the rate of floc formation and sedimentation. For each level of turbidity and algae, a direct relationship was obtained between the alum dose and the difference values of the electrical charges in the raw and treated water under the same conditions. Alum dosage must be tailored to meet your specific wastewater characteristics and discharge requirements. Through RSM optimization, the optimum dose for alum was 7 mg/l and for polymer was 0.004 mg/l. Thetreatment reduced the total solids of the wastewater by 89.6%, and produced a supernatant with a pH of4.15 and an optical density of 0.194 nm. Feed Rate (lbs/day) = dosage (parts per million) × Flow Rate (million gallons per day) × 8.34 lbs/gal Below is the pounds formula expressed in a mechanical wheel. Aim: To determine the optimum dosage of coagulant to remove small or charged particles present inside water by using "Alum" as coagulant. Optimum pH for the coagulation operation obtained through traditional methods and RSM was 7.6. dose. Fig. 3) Determination of optimal coagulant dosage . The optimum alum dosage was higher (20 mg/L) for initial turbidity of 1000 NTU which was the lowest required dosage obtained the highest turbidity removal. dosage that caused the highest percentage of turbidity removal, in other words the concentration of alum that showed the lowest level of turbidity in a sample of each of the 16 experiments. It is noteworthy that the pH of the sample from station 10 (farthest into the east bay) dropped almost two pH units with a 100 ppm alum dose. The optimum aluminum sulfate dosage was 2 g/L. appears that a dose of 100 ppm alum is required to achieve both turbidity reduction and the lowest dissolved Al concentrations, and maximum phosphorus removal. Optimum dose of alum for removal arsenic is . It was observed that the optimum dose for alum obtained through the traditional method was 12 mg/l, while the value for polymer was set constant at 0.020 mg/l. 25 mg/L because 30 mg/L of alum dose was worse . 4 indicates re- Principle : The two basic terms which can exactly explain the happenings of this experiment are "Coagulation" and "Flocculation". The best performance of alum in removing turbidity from water was obtained at pH 7 following by pH 6. The dose of coagulant which gives the best floc is the optimum dose … The research is aimed to propose an alternative to the jar test allowing for an on line determination of optimal coagulant dosage from raw water characteristics and design a system for feeding Alum and Lime automatically with a monitoring display. Having defined an initial optimal dose, we proceeded to The coagulation efficiency of alum We varied the alum dose added to the influent stream from 0 mg/L to 45 mg/L in increments of 5 mg/L for an influent turbidity of 50, 75, 100, and 150 NTU. The mechanical wheel can be used to solve a chemical dosage problem by plugging in the given information and then multiplying or dividing as indicated to determine the solution. than 25 mg/L for arsenic removal. It means that important requirement arises to automate the system with optimum coagulant dosage. It all depends on the wastewater characteristics, the mixing & dispersion conditions, the phosphorus concentration in your raw water and the expected … 1. The optimum alum dose has been estimated electrically based on the difference between the electrical charges in the treated and the raw water under the same conditions. How is an optimal dosage determined when using alum for phosphorus removal for the final effluent in a wastewater MBR? DETERMINATION OF THE OPTIMUM COAGULANT DOSE (ALUMINIUM SULPHATE) IN THE WATER TREATMENT PLANT OF ATHENS IN GALATSI FACILITIES DURING THE SUMMER PERIOD To determine the optimal alum dose needed for an influent water turbidity of 100 NTU, we set up a special program in Process Controller. Coagulation: It is the process of addition of a chemical to de-stabilize a… 1.

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