In attached figure please choose the suitable character for recovery zone A .C D E B Trout, perch, bass: Trash fish; mayfly, stonefly, caddisfly larvae blackfly and midge farvae Fish absent: sludge worms; midge and mosquito larvae Trash fish: blackfly and midge larvae Trout, perch, bass3; mayfly, stonefly, caddistly larvae Dissolved oxygen 8 ppm Oxygen sag Biochemical Oaypen demand ppm Select one: a. (e) b. (d) b(D) с. (b) d. (c) e. (f) f. (a)

In attached figure please choose the suitable character for recovery zone A .C D E B Trout, perch, bass: Trash fish; mayfly, stonefly, caddisfly larvae blackfly and midge farvae Fish absent: sludge worms; midge and mosquito larvae Trash fish: blackfly and midge larvae Trout, perch, bass3; mayfly, stonefly, caddistly larvae Dissolved oxygen 8 ppm Oxygen sag Biochemical Oaypen demand ppm Select one: a. (e) b. (d) b(D) с. (b) d. (c) e. (f) f. (a)

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The Rajasthan river water suspended matter and particles is quite low at the Kanowit tributary. The planned water treatment plant source of raw water intake is the kanowit tributary. Proposed a suitable process to be adopted is designing the treatment plant. Justify the selected sequence proposed.prescribe the chemicals required in each step if any.
A centrifuge dewaters digested sludge from ananaerobic digester. Pertinent performance data are; raw sludge feed rate to the anaerobicdigester = 60,000 lb/day on a dry solids basis, digester suspended solids removalefficiency = 55 percent, suspended solids concentration in digested sludge fed to thecentrifuge = 5.0 percent by weight, centrifuge cake solids concentration = 30 percent byweight, centrifuge solids capture = 90 percent. Sketch a process flow schematic of the system showing both the digester andcentrifuge and all flowing fluid streams, clearly identify the appropriate control surface(s)for mass balance analyses, and then determine;(i) dewatered sludge mass flow rate (lb/day)(ii) centrate flow rate (gal/day)(iii) centrate suspended solids concentration (mg/l).
Pls ans soon
PART A Bacteria can be divided according to the dissolved oxygen utilization pattern. Differentiate and explain the three main categories of bacteria involved. 1. A BOD analysis was conducted on a raw sewage sample. 300 mL of sample was placed in a 300 mL BOD bottle, and incubated for 5 days at 20°C. Based on your knowledge on the sample characteristic and BOD procedure, explain about the validity and the outcome of the analysis. 2. 3. Explain why oxygen depletion occurs when organic waste is disposed directly in the lake. And mention ONE adverse impact of oxygen depletion.
An anaerobic digester (AD) is designed with the following data. Organic loading rate 1.0 kg VSS/m³.day VSS load 120 kg/day (i). (ii). Estimate the volume of the AD. If the VSS is 12 kg/m³, estimate the retention time.
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;…
Problem 4. A small community with a population of 25,200 is seeking your services as a consulting environmental engineer. They have tested their drinking water supply for coliform organisms by the fermentation tube method (five 10 ml portions per sample). They have come up with the following tabulated results for their April 2023 samples: No. of Samples 1 1 2 0 3 24 No. of + portions 5 4 3 2 1 0 No. of - portions 0 1 2 3 4 5 a. What is the calculated monthly average MPN? b. Just by looking at the calculated MPN can you comment on the safety of the drinking water of your client? -coliforms/100 ml.
Please solve
A sewage treatment plant uses the activated sludge process in its biological treatment unit with discharge of 8000m³/day having a MLVSS concentration of 3000mg/l in the aeration tank which has a volume of 25000m The BOD was 300mg/l in primary sedimentation tank. Calculate the organic loading F/M ratio.
Q1.Clearly indicate if each of the following is True or False 1) The amount of bypassed water in split treatment of hardness depends on material balance on Mg². 2) Most water treatment plants in Iraq are using polymers as a coagulant. 3) In drinking water, most of alkalinity comes from SO4². 4) Circle or ring system is the most common method used now to design water distribution systems. 5) Fecal Coliforms and E-Coli are generally pathogenic and we need to test them to avoid their diseases. 6) In flocculation process, we need rapid mixing to enhance formation of flocs for better settlement. 7) In filtration, the only mechanism involved is the straining. 8) It is better to travel downhill, avoid rush hours, and avoid left turn when designing a route for packers. 9) Ozone in Stratosphere layer helps prevent UV light from reaching earth and causing skin problems. 10) Transfer station is used to transfer solid waste to final destination in more efficient way.
Please ans a and b