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what is the optimum alum dosage

what is the optimum alum dosage

The optimum aluminum sulfate dosage was 2 g/L. How is an optimal dosage determined when using alum for phosphorus removal for the final effluent in a wastewater MBR? 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 . 3) Determination of optimal coagulant dosage . 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. 4 indicates re- Alum dosage must be tailored to meet your specific wastewater characteristics and discharge requirements. 1. Principle : The two basic terms which can exactly explain the happenings of this experiment are "Coagulation" and "Flocculation". 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. DETERMINATION OF THE OPTIMUM COAGULANT DOSE (ALUMINIUM SULPHATE) IN THE WATER TREATMENT PLANT OF ATHENS IN GALATSI FACILITIES DURING THE SUMMER PERIOD 1. Coagulation: It is the process of addition of a chemical to de-stabilize a… 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. 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. 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. 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. 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. The dose of coagulant which gives the best floc is the optimum dose … The coagulation efficiency of alum than 25 mg/L for arsenic removal. 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. It means that important requirement arises to automate the system with optimum coagulant dosage. 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. Through RSM optimization, the optimum dose for alum was 7 mg/l and for polymer was 0.004 mg/l. dose. 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. 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. Fig. Optimum dose of alum for removal arsenic is . 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. It all depends on the wastewater characteristics, the mixing & dispersion conditions, the phosphorus concentration in your raw water and the expected … The best performance of alum in removing turbidity from water was obtained at pH 7 following by pH 6. Having defined an initial optimal dose, we proceeded to To determine the optimal alum dose needed for an influent water turbidity of 100 NTU, we set up a special program in Process Controller. 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.

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