6. After igniting a sample that was filtered through a 2-micron Whatman GF/C filterin an oven at 550°C, the cooled Gooch crucible + filter + residue weighed55.9183 g. What is the mass (grams) of the Total Fixed Suspended Solids (TFSS)on the filter?(Ans: 0.0065 g)7. What is the concentration (mg/L) of the TFSS in the influent?(Ans: 72.2 mg/l)8. What is the concentration (mg/L) of the TVSS in the influent?(Ans: 217.8 mg/L)Biochemical Oxygen Demand (BOD):9. If you anticipate a 5-day Biochemical Oxygen Demand (BOD5) mass loading of54,243 lb/day at this flow rate, what is the concentration of BOD5 you anticipatein the influent?(Ans: 325 mg/L)10. Based on the BOD dilution guide what volume of inoculation should be added tothe BOD bottles? Assume that the lab technician is using 300 ml BOD bottles.11. What is the concentration of dissolved oxygen in the DO bottle used to quantifythe influent BOD5 after five days if its initial DO was 7.3 mg/l. (Ans: 1.88 mg/L)12. Calculate the influent ultimate BOD load (Lo) and the BOD curve constant (k) iflaboratory testing yielded the following results:(Ans: L₁ = 377.3 mg/L & k = 0.4120 per day)Time (days)01234567%BOD5¹0%40 %65 %80 %92%100 %106 %110 %13. Plot the influent BOD curve. Problem: You are designing a 20 mgd wastewater treatment plant. To characterize theplant's influent solids, the lab used 90 ml samples of the ty[ical wastewaterand the following equipment:Solids:Lab EquipmentEvaporation DishGooch crucible2.0-micron paper filter2.0-micron Whatman GF/C filterLab MeasurementDish + Residue after evaporation4.Weight54.2830g54.2170g1.5240g1.6948g1. The lab placed a sample in an evaporation dish and evaporated it at 105°Cfinding that the dish weighted 54.3490 g after the dish cooled. What is theconcentration (mg/L) of the Total Solids (TS) in the influent?(Ans: TS = 733.3 mg/L)54.349g2. If you anticipate a Total Suspended Solids mass loading of 48,400 lb/day at thisflow rate, what is the concentration of TSS you anticipate in the influent?What does the analytical scale read?3. The lab then filtered a sample through a 2-micron filter and evaporated the filterat 105°C, what was the mass of the residue found on the filter paper after itcooled?(Ans: 0.0261 g)(Ans: 1.550 g)5. What is the concentration of the Total Dissolved Solids (TDS) in the influent?(Ans: TDS = 443.3 mg/l)

Problem: You are designing a 20 mgd wastewater treatment plant. To characterize the plant's influent solids, the lab used 90 ml samples of the ty[ical wastewater and the following equipment: Solids: Lab Equipment Evaporation Dish Gooch crucible 2.0-micron paper filter 2.0-micron Whatman GF/C filter Lab Measurement Dish + Residue after evaporation Weight 54.2830g 54.2170g 1.5240g 1.6948g 54.349g 1. The lab placed a sample in an evaporation dish and evaporated it at 105°C finding that the dish weighted 54.3490 g after the dish cooled. What is the concentration (mg/L) of the Total Solids (TS) in the influent?(Ans: TS = 733.3 mg/L) 2. If you anticipate a Total Suspended Solids mass loading of 48,400 lb/day at this flow rate, what is the concentration of TSS you anticipate in the influent? 3. The lab then filtered a sample through a 2-micron filter and evaporated the filter at 105°C, what was the mass of the residue found on the filter paper after it cooled? (Ans: 0.0261 g)

Problem: You are designing a 20 mgd wastewater treatment plant. To characterize the plant's influent solids, the lab used 90 ml samples of the ty[ical wastewater and the following equipment: Solids: Lab Equipment Evaporation Dish Gooch crucible 2.0-micron paper filter 2.0-micron Whatman GF/C filter Lab Measurement Dish + Residue after evaporation Weight 54.2830g 54.2170g 1.5240g 1.6948g 54.349g 1. The lab placed a sample in an evaporation dish and evaporated it at 105°C finding that the dish weighted 54.3490 g after the dish cooled. What is the concentration (mg/L) of the Total Solids (TS) in the influent?(Ans: TS = 733.3 mg/L) 2. If you anticipate a Total Suspended Solids mass loading of 48,400 lb/day at this flow rate, what is the concentration of TSS you anticipate in the influent? 3. The lab then filtered a sample through a 2-micron filter and evaporated the filter at 105°C, what was the mass of the residue found on the filter paper after it cooled? (Ans: 0.0261 g)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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6. After your flash mix the water was sent to a clarification basin that was 24 feet in diameter and 20 feet tall. What was the detention time in hours of 0.43 MGD? 5.4 hours 4.3 hours 3.8 hours 2.3 hours After the water leaves your sedimentation basin, it is ready for filtration. Your two filters measure 10 feet in diameter. What is the filtration rate is gpm for your flow of 0.43 MGD? 19 gpm/sq/ft 29 gpm/sq/ft 39 gpm/sq/ft 49 gpm/sq/ft You have had a filtration breakthrough (failure) and have brought your old roughing filtration system on line. The old filter is 8 feet square and 4 feet deep. What is the filtration rate in gpm/sq/ft for your flow of 0.43 MGD? 10.33 gpm/sq/ft 8.55 gpm/sq/ft 5.99 gpm/sq/ft 4.66 gpm/sq/ft
Muni.waste.
The concentration of the mixed liquor suspended solids, MLSS, in the basin of a step aeration system is 2300 mg/L, and the volume of settled sludge after 30 minutes in a 1 L graduated cylinder is 200 mL. Calculate the SVI in mL/g.
PART B 1. The data are given as follows: Weight of evaporating dish: 53.5430 g Weight of evaporating dish and residue after drying at 103°C: 53.5760 g Weight of filter and residue after drying at 103°C: 1.5530 g Weight of filter and residue after ignition at 550°C: 1.5450 g Volume of sample filtered: 50 mL Volume of sample dried: 80 mL Determine the total solids, volatile suspended solids, suspended solids, fixed suspended solids and total dissolved solids. Assume 60% of suspended solids were loss on ignition.
Q-The MLSS concentration in an aeration tank is 2000 mg/l and the sludge volume after 30 minutes of setting in a 1000 ml graduated cylinder is 175 ml. Find the value of sludge density index (SDI).
3. A 100 mL of wastewater sample was drying on a 0.5 g empty dish weight at 104 °C to weight 0.5625 g. Another 100 mL of the same wastewater was first filtered and the filtrate was dried on a 0.5 g dish at 104 °C to weight 0.5325 g. Determine in mg/L the:a) TSb) TSSc) TDSd) VSS assuming it represents 70% of TSS
If a manufacturing facility generates raw wastewater that is predominantly composed of dissolved and suspended solids and with ThOD of 100 mg/L, which of the following treatment equipment you could do away with? Check all that applies.
Assume that all solutions are prepared at 25 degrees celsius and the solutes arr completely dissolved. In the lead content analysis of a wastewater sample, 75.00 mL of the original sample was taken and diluted with 125.00 mL deionized water. The diluted sample was found to have a lead content of 19.2 ppb. What is the lead content (in pbb) of the original wastewater sample?
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