Raw wastewater entering the Castle Hill Sewage Treatment Plant passes through a grit chamber, which is...

   

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Raw wastewater entering the Castle Hill Sewage Treatment Plant passes through a grit chamber, which is 100% effective for removing fixed suspended solids. Following mechanical screening, the wastewater enters a primary sedimentation process with total suspended solids concentration of 455 mg/L in the influent. Primary sedimentation achieves 73.5% TSS removal and primary sludge is produced at a rate of 25.5% of the primary sedimentation influent flow rate. A laboratory analyst takes a 50 mL sample of the primary effluent and filters it through a glass fibre filter with a (clean) dry mass of 1510 mg. After filtration and then drying in an oven at 105 °C to a constant mass, the filter is weighed and the mass is recorded as "Mass #1". The filter is then placed in a furnace at 550 °C for 6 hours, weighed again and the mass recorded as "Mass #2". Calculate: (a) TSS concentration in primary effluent (5 marks) (b) TSS concentration in primary sludge (5 marks) (c) Expected value of "Mass #1" (5 marks) (d) Expected value of "Mass #2" (5 marks) Raw wastewater entering the Castle Hill Sewage Treatment Plant passes through a grit chamber, which is 100% effective for removing fixed suspended solids. Following mechanical screening, the wastewater enters a primary sedimentation process with total suspended solids concentration of 455 mg/L in the influent. Primary sedimentation achieves 73.5% TSS removal and primary sludge is produced at a rate of 25.5% of the primary sedimentation influent flow rate. A laboratory analyst takes a 50 mL sample of the primary effluent and filters it through a glass fibre filter with a (clean) dry mass of 1510 mg. After filtration and then drying in an oven at 105 °C to a constant mass, the filter is weighed and the mass is recorded as "Mass #1". The filter is then placed in a furnace at 550 °C for 6 hours, weighed again and the mass recorded as "Mass #2". Calculate: (a) TSS concentration in primary effluent (5 marks) (b) TSS concentration in primary sludge (5 marks) (c) Expected value of "Mass #1" (5 marks) (d) Expected value of "Mass #2" (5 marks) Raw wastewater entering the Castle Hill Sewage Treatment Plant passes through a grit chamber, which is 100% effective for removing fixed suspended solids. Following mechanical screening, the wastewater enters a primary sedimentation process with total suspended solids concentration of 455 mg/L in the influent. Primary sedimentation achieves 73.5% TSS removal and primary sludge is produced at a rate of 25.5% of the primary sedimentation influent flow rate. A laboratory analyst takes a 50 mL sample of the primary effluent and filters it through a glass fibre filter with a (clean) dry mass of 1510 mg. After filtration and then drying in an oven at 105 °C to a constant mass, the filter is weighed and the mass is recorded as "Mass #1". The filter is then placed in a furnace at 550 °C for 6 hours, weighed again and the mass recorded as "Mass #2". Calculate: (a) TSS concentration in primary effluent (5 marks) (b) TSS concentration in primary sludge (5 marks) (c) Expected value of "Mass #1" (5 marks) (d) Expected value of "Mass #2" (5 marks) Raw wastewater entering the Castle Hill Sewage Treatment Plant passes through a grit chamber, which is 100% effective for removing fixed suspended solids. Following mechanical screening, the wastewater enters a primary sedimentation process with total suspended solids concentration of 455 mg/L in the influent. Primary sedimentation achieves 73.5% TSS removal and primary sludge is produced at a rate of 25.5% of the primary sedimentation influent flow rate. A laboratory analyst takes a 50 mL sample of the primary effluent and filters it through a glass fibre filter with a (clean) dry mass of 1510 mg. After filtration and then drying in an oven at 105 °C to a constant mass, the filter is weighed and the mass is recorded as "Mass #1". The filter is then placed in a furnace at 550 °C for 6 hours, weighed again and the mass recorded as "Mass #2". Calculate: (a) TSS concentration in primary effluent (5 marks) (b) TSS concentration in primary sludge (5 marks) (c) Expected value of "Mass #1" (5 marks) (d) Expected value of "Mass #2" (5 marks) Raw wastewater entering the Castle Hill Sewage Treatment Plant passes through a grit chamber, which is 100% effective for removing fixed suspended solids. Following mechanical screening, the wastewater enters a primary sedimentation process with total suspended solids concentration of 455 mg/L in the influent. Primary sedimentation achieves 73.5% TSS removal and primary sludge is produced at a rate of 25.5% of the primary sedimentation influent flow rate. A laboratory analyst takes a 50 mL sample of the primary effluent and filters it through a glass fibre filter with a (clean) dry mass of 1510 mg. After filtration and then drying in an oven at 105 °C to a constant mass, the filter is weighed and the mass is recorded as "Mass #1". The filter is then placed in a furnace at 550 °C for 6 hours, weighed again and the mass recorded as "Mass #2". Calculate: (a) TSS concentration in primary effluent (5 marks) (b) TSS concentration in primary sludge (5 marks) (c) Expected value of "Mass #1" (5 marks) (d) Expected value of "Mass #2" (5 marks)