c) The chlorine residuals measured when various dosages of chlorine were added to a sample of water are given on table Q2. Dosage (mg/l) 0.06 0.8 1.5 0.26 0.5 1.0 1.3 Residual (mg/l) 0.5 0.75 0.3 0.4 0.2 0.2 Determine: i. Breaking point dosage ii. Design dosage to obtain the residual of 0.4mg/l of the available chlorine. iii. Explain what is happening as the dosage of chlorine is increased

c) The chlorine residuals measured when various dosages of chlorine were added to a sample of water are given on table Q2. Dosage (mg/l) 0.06 0.8 1.5 0.26 0.5 1.0 1.3 Residual (mg/l) 0.5 0.75 0.3 0.4 0.2 0.2 Determine: i. Breaking point dosage ii. Design dosage to obtain the residual of 0.4mg/l of the available chlorine. iii. Explain what is happening as the dosage of chlorine is increased

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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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
Wastewater Engineering civil engineering (10)
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Total suspended particulate matter concentration in ambient air is to be measured using a high- volume sampler. The filter used for this purpose had an initial dry weight of 9.787 g. The filter was mounted in the sampler and the initial air flow rate through the filter was set at 1.5 m³/min. Sampling continued for 24 hours. The airflow after 24 hours was measured to be 1.4 m³/min. The dry weight of the filter paper after 24 hours sampling was 10.283 g. Assuming a linear decline in the air flow rate during sampling, what is the 24 hour average TSP concentration in the ambient air(in 10-6 g/m³?
6. Please answer the following questions: (a) Why control of pH is considered important and what are the main sources of acidity and alkalinity in natural waters? (b) A 100-ml sample require 20.2 ml of 0.02N H₂SO4 to reach the phenolphthalein end point, and a total of 25.6 ml to reach the Methyl orange end point. Calculate total alkalinity and indicate what fraction corresponds to hydroxides, carbonates and bicarbonates (c) The uptake for a water supply system is located at a location named X3 (see Figure); upstream X3, there are two villages that discharge raw sewage at X1 and X2, and new wastewater treatment systems are needed in both villages in order to reduce the concentration of BOD. Calculate the current concentration of BOD at X3, and the required removal efficiency (% BOD removal) in the new wastewater treatment works (WWTW) to control BOD discharges at X1 and X2, so the BOD at X3 ≤ 10mg/L. QR LR X₁ L₁ X₂ Mg(HCO3)2 = 73; CaCl₂ = 111; L₂ LR= 5 mg/L ; QR= 1000, L/s Q1 = 200 L/s;…
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.
This is for a water and wastewater review. It's not for a grade I just need to understand the problem, please include equations and choose one of the answer choices.
The following test results (Table Ql-2) were obtained from a raw water sample. All of the tests were performed using a sample volume of 50 mL. Table Q1-2 Weight (g) Mass of residue after drying at 105 ỏC Mass of residue after ignition at 550 ¿C Mass of residue on Whatman GF/C filter paper after drying at 0.7148 0.3818 0.3571 105 'C Mass of residue on Whatman GF/C filter paper after ignition at 550 'C 0.1418 Calculate the concentration (mg/L) of : (i) total solids. (ii) total volatile solids. (iii) total suspended solids. (iv) total dissolved solids.
Coming home after the end of the winter semester, you find that your family’s swimming pool has not be maintained well. In particular, it has no chlorine residual at all, and it is full of tree leaves. You buy a concentrated chlorine solution (1% as Cl2) and begin to meter it into the pool at a rate of 100 mL/hour. The pool has a volume of 200 m3. You also add new water, and remove in-pool water, at a rate of 3.785 L/minute. The chlorine reacts with the organic matter in the with a rate of 0.5/hour. How long will it take to get the Cl2 residual up to 1 mg/L if you add Cl2 continously.
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