1. Bacteria can be divided according to the dissolved oxygen utilization pattern. Differentiate and explain the three main categories of bacteria involved. 2 Explain why oxygen depletion occurs when organic waste is disposed directly in the lake. And mention ONE adverse impact of oxygen depletion

1. Bacteria can be divided according to the dissolved oxygen utilization pattern. Differentiate and explain the three main categories of bacteria involved. 2 Explain why oxygen depletion occurs when organic waste is disposed directly in the lake. And mention ONE adverse impact of oxygen depletion

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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Concept explainers

Biological Processes

Biological solid waste includes bacterial and contaminated waste produced by living individuals. Its treatment is essential to prevent the spread of any air-borne or water-borne diseases or diseases transmitted from one organism to another in a food chain. There are many benefits of the biological solid waste treatment and some of them are: the minimized quantity of waste substance, waste control, eradicating any disease-causing pathogens, generation of biogas, composting, anaerobic digestion, bio drying, mechanical biological treatment, microbial fuel cell, phytoremediation, and biofiltration. The final products of the biological solid waste treatment may be recycled to obtain organic fertilizers or disposed of in SWDS (Solid Waste Disposal Site) after proper treatment.

Question

1. Bacteria can be divided according to the
dissolved oxygen utilization pattern.
Differentiate and explain the three main
categories of bacteria involved.
2 Explain why oxygen depletion occurs when
organic waste is disposed directly in the lake.
And mention ONE adverse impact of oxygen
depletion

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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.
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A city wishes to discharge wastewater primary effluent to a river which supports a trout. The state requires the city to show that the trout population is protected. Trout require a minimum of 4 mg/l of dissolved oxygen to survive. Determine the minimum downstream dissolved oxygen concentration from the following information about the wastewater discharge and river. Does the minimum dissolved oxygen concentration meet the requirements? Wastewater discharge=0.45m3/s, river flow rate= 8.5 m3/s, river cross-sectional area=19m2, dissolved Oxygen concentration in the wastewater= 0.2mg/l, dissolved oxygen content of the river upstream = 8.1mg/l, saturation dissolved oxygen concentration at 20 C= 9.0 mg/l, BOD concentration in wastewater = 85 mg/l, BOD concentration upstream in the river= 0.2 mg/l, BOD decay constant = 0.2 d-1, and the reaeration constant for the river= 0.4 d-1.
1. Question number (1) WASTEWATER ENGINEERING Civil Engineering Clear handwriting please
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.
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