EVEG 3110_HW_1_Assigned_01_30_24_moe (1)

Determine the preak point dosage of chlorine given the data below which was obtained from chlorination experiment. 5 6 7 Dosage(mg/L) Required Cl₂Cmg/L 0.2 0.45 1.05 2.75 4.5 5.15 6.03 1 2 3 4

Problem 4. A receipt of surface water sample is given in Table below: Substance Concentration (mg/L) Total Hardness 1000 mg/L CaCO3 Phenolphthalein acidity 5 mg/L CaCO3 Phenolphthalein Alkalinity 3 mg/L CaCO3 It is known that phenolphthalein alkalinity is only due to CO3²- and phenolphthalein acidity is only due to H₂CO3. Assuming the hardness of sample is because of calcium and magnesium ions, alkalinity-acidity are due to the carbonate species, calculate: a) The pH of sample. b) Temporary and permanent hardness as mg/L CaCO3. c) Total alkalinity and acidity as mg/L CaCO3. Molecular weights (g/mole): Ca = 40, Mg = 24, H = 1, C = 12, 0 = 16

Calculate Total Solids (TS), Total Dissolved Solids (TDS) and Total Suspended Solids (TSS) in mg/L from the following data of a water sample. All beaker weights were measured after a full day in the oven. Sample amount (mL): 250 Weight of beaker (g): 106.5113 Weight of beaker + solids before filtration of sample (g): 106.5603 Weight of beaker (g): 120.5748 Weight of beaker + solids after filtration of sample (g): 120.6123

QUESTION 4 Adding 20ml sample to a 300ml DO bottle causes its dissolved oxygen concentration to decrease by 10 mg/l. by the end of the first day What is the BOD1 of the sample? Answer mg/L

Sanitary Engineering Potential of Hydrogen (pH) same question please help me:   1-What are alternative methods for determining the pH of aqueous samples?2- What are typical pH values of drinking water in Jordan? How do your datacompare with these values?3-Discuss the relationship between (a) pH and hydrogen ion concentration (b) pHand hydroxide ion concentration?

Topics Covered: Water Quality 1. Wastewater samples were prepared and incubated at 20°C for 5 days for BOD analysis. Sample dilutions and the corresponding initial and final dissolved oxygen concentrations are summarized in the following table. Using the correct dilutions, estimate BOD5. Estiamte ultimate BOD if the BOD rate constant is 0.36/d. Bottle Sample Volume Initial Final DO DO 1 1 9.1 8.5 9.0 6.3 15 9.0 1.2 40 8.9 0.2 234

The chlorine demand test conducted in a laboratory for raw water samples is tabulated below. Sample A B с D E F G H I Chlorine dosage (mg/l) 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 Residual chlorine (mg/l) 0.15 0.31 0.48 0.60 0.55 0.24 0.45 0.65 0.85 What is the breakpoint dosage and chlorine demand at dosage of 1.4 mg/1 respectively?

al 2. Please design a Type II settling tank that receives a 1000 m3/day of a waste stream, after flocculation, that displays the following settling behavior. The initial concentration for this test is 500 mg/L. Time (min) 5 10 20 30 40 50 60 75 1 meters 2 meters 481 418 331 270 225 193 154 133 490 456 425 361 325 279 240 198 3 meters 495 483 463 413 369 333 290 259 Concentrations are in mg/L If the required removal rate is 50%, how large should the tank be?

Waste Water Question 3: The following observations were made on 2% dilution of wastewater: Dissolved oxygen of aerated water used for dilution = 0 mg/l Dissolved oxygen of diluted sample after 5 days = 0.6 mg/l Dissolved oxygen of original sample = 2.0 mg/l The BOD of 5 days of the sample is:

A sample of water from a surface stream is analyzed with the following results: Calcium = 98 mg/L, Chlorine = 89 mg/L, Bicarbonate = 317 mg/L Magnesium = 22 mg/L , Potassium = 71 mg/L, Sulphate = 125 mg/L i) Draw a bar diagram for the water, il) Determine the alkalinity of the water, ili) Determine the total hardness, carbonate hardness and non carbonate hardness for the water.

A laboratory provides the following analysis obtained from a 500-mL sample of wastewater. 105 °C 550 °C 200 a) b) Net mass of residual solids without filtering (mg) Net mass of residual solids on the filter (mg) Net mass of residual solids passing through the filter (mg) 75 What is the concentration of the total suspended solids in this sample? What is the organic matter percentage of the total solids? 120 30

Given concepts of water quality: Some of the more important general water quality parameters can be listed as (a), (b), and (c). Solids present in water can be evaluated through size exclusion by using a glass fiber and removing the water from each fraction in an oven at 103 °C. Once dried, the solids left behind can be weighed and three subcategories of solids can be determined: three categories can be further subdivided into furnace) and (d), (e), and (f) all (g) (lost during ignition at 550 °C in the (h) (remain in the dish after ignition at 550 °C). All terms are listed in the singular (solids is not a valid answer for a, b or c), there are no acronyms, or compounded terms. Allare single words. a) ; b) d) e) : e) ; f) ; h)

Solids analysis is one of the most widely used parameters for assessing water quality. Use the following data to determine (a) total solids (TS); (b) volatile solids (VS); (c) dissolved solids (DS); (d) total suspended solids (TSS), and (e) total volatile suspended solids (TVSS) all in mg/L. A sample volume of 150 ml was used in performing all solids analyses. Tare mass of evaporating dish = 24.3520 g Mass of evaporating dish plus residue after evaporation @ 105°C = 24.3970 g Mass of evaporating dish plus residue after ignition @ 550°C = 24.3850 g Mass of Whatman filter and tare Mass of Whatman filter and tare after drying @ 105°C Residue on Whatman filter and tare after ignition @ 550°C = 1.5103 g 1.5439 g 1.5199 g

After three days, the BOD concentration in a water sample was determined to be 75 mg/lt with a response rate constant of 0.345/day. Calculate the quantity of BOD remaining in the water sample after ten days.

1. A sample of water having a pH of 7.2 has the following concentration of ions. Determine the water's total hardness. lon Concentration (mg/L) HCO, 110 so* 67.2 CI 11 lon Concentration (mg/L) Ca* 40 Mg* 10 Na' 11.8 K* 7.0

A laboratory provides the following solids analysis for a wastewater sample: TS = 290 mg/L; TDS = 37 mg/L; FSS = 38 mg/L. a) How you can measure the following parameters: Fixed Dissolved Solids: Volatile Suspended Solids: b) What is the total suspended solids concentration of this sample? c) Does this sample have appreciable organic matter? Why or why not

H Gy Q#4:The table shows data of a wastewater sample collected from a river with a temperature of 30 °C analyzed for the BODs test. The rate constant is 0.2 day-¹ at the lab temperature (20 C). Find BODs at the river. Initial dissolved oxygen, mg/L 9 What will be the BOD7 at the river? Final dissolved oxygen, mg/L 3.5 Sample volume, ml 35

Give a statistical interperation of the data Split Samples. An industry and a municipal wastewater treatment plant disagreed about wastewater concentrations of total Kjeldahl nitrogen (TKN) and total suspended solids (TSS). Specimens were split and analyzed by both labs, and also by a commercial lab. The results are below. Give your interpretation of the situation. Specimen 1 2 3 4 5 6 7 Muni. 1109 1160 1200 1180 1160 1180 1130 TKN Ind. 940 800 800 960 1200 1200 900 Comm. Muni. 1500 1850 1215 2570 1215 2080 1155 2380 1120 2730 1120 3000 1140 2070 TSS Ind. 1600 2100 2100 1600 2100 2700 1800 Comm. 1600 1400 1400 1750 2800 2700 2000

Water Gs=1 1. In a test to determine the discharge h = 300 coefficient of a 70 by 35 mm Venturi meter, the total weight of water passing through the meter in 5 minutes was 3.5 kN. A mercury differential gage connected to the inlet and throat of the meter showed an average mercury difference during that time of 300 mm. Determine the actual discharge if the same meter is used later on and a 250 mm difference is then observed. mm Mercury, Hg Gs= assume, 4 significant figures 2. The diameter of a 3 meter pipe decreases from 450 mm to 150 mm. If the velocity is to decrease uniformly in a linear manner, draw the diameter profile at each 500 mm length interval along the pipe. Discharge is 150 liters per second.

Water Gs=1 1. In a test to determine the discharge coefficient of a 70 by 35 mm Venturi meter, the total weight of water passing through the meter in 5 minutes was 3.5 kN. A mercury differential gage connected to the inlet and throat of the meter showed an average mercury difference during that time of 300 mm. Determine the actual discharge if the same meter is used later on and a 250 mm difference is then observed. h = 300 mm Mercury, Hg Gs = assume, 4 significant figures

A laboratory provides the following analysis obtained for a wastewater sample: Total Solids = 200 mg/L %3D Total Suspended Solids 160 mg/L Fixed Suspended Solids 30 mg/L %3! Volatile Suspended Solids = 120 mg/L What is the concentration of the Total Dissolved Solids of this sample?

The concentration of dissolved oxygen in a sample of waste water decreases from 9 x 10^3 g/L to 6.2 x 10^3 g/L after five days. Determine the BOD of the sample in mg/L.

Turbidity is taken as an indirect measure of Total Suspended Solids (TSS) in water. Why do you choose to have Turbidity instead of direct measurement of TSS? Give 2 more parameters used as indirect measurement of water quality.

2. Please design a Type II settling tank that receives a 1000 m3/day of a waste stream, after flocculation, that displays the following settling behavior. The initial concentration for this test is 500 mg/L. Time (min) 5 10 20 30 40 50 60 75 1 meters 481 418 331 270 225 193 154 133 2 meters 490 456 425 361 325 279 240 198 3 meters 495 483 463 413 369 333 290 259 Concentrations are in mg/L If the required removal rate is 50%, how large should the tank be?

Q 02:  Dissolved oxygen (D0) is influenced by which factors? Explain. How can you determine chloride content in a waste water sample?   Note: Write the answer in each part in word format Subject:    Environmental Engineering 2 Lab

Find the water content in the following calculations 1- Liquid limit Determination: Weight of can+ Wet sample (gm) Weight of can+ Wet sample (gm) Weight of Water Number of Trial No. can content Blows (gm) 0% (N) 1 9.13 22.52 18.47 41 33.11 44.76 40.94 50 3 4 116.91 136.13 129.43 20 71.37 87.10 81.71 23