A CMAS treatment system must be designed for a municipal wastewater and the following operating conditions: • Effluent flow of 0.39 m³/s leaving the primary clarifier • Effluent soluble BOD5 of 310 mg/L leaving the primary clarifier 20 mg/L of soluble BOD5 allowed in the effluent from the secondary clarifier Negligible suspended solids in the effluent from the secondary clarifier Volatile suspended solids concentration of 4300 mg/L in the aeration tank In the laboratory under log-growth conditions, the microorganisms used in the aeration tank can convert 100 g soluble BOD5 into 55 g Vss Microorganisms in the CMAS system have a death rate constant of 0.05 d. Sludge age in the CMAS treatment system will be 4 days (a) Determine the % treatment efficiency for soluble BOD5 required in the CMAS system. (b) Determine the required volume of the aeration tank (in m²) and HRT (in h). (c) Determine the food-to-microorganism ratio (in d') and the specific substrate utilization ratio (in d'). (d) Determine the expected rate of sludoe production (in kgld).

A CMAS treatment system must be designed for a municipal wastewater and the following operating conditions: • Effluent flow of 0.39 m³/s leaving the primary clarifier • Effluent soluble BOD5 of 310 mg/L leaving the primary clarifier 20 mg/L of soluble BOD5 allowed in the effluent from the secondary clarifier Negligible suspended solids in the effluent from the secondary clarifier Volatile suspended solids concentration of 4300 mg/L in the aeration tank In the laboratory under log-growth conditions, the microorganisms used in the aeration tank can convert 100 g soluble BOD5 into 55 g Vss Microorganisms in the CMAS system have a death rate constant of 0.05 d. Sludge age in the CMAS treatment system will be 4 days (a) Determine the % treatment efficiency for soluble BOD5 required in the CMAS system. (b) Determine the required volume of the aeration tank (in m²) and HRT (in h). (c) Determine the food-to-microorganism ratio (in d') and the specific substrate utilization ratio (in d'). (d) Determine the expected rate of sludoe production (in kgld).

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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Integrated Solid Waste Management

Integrated Solid Waste Management (ISWM) is a thorough waste suppression, compost, removal and recycling Program. An effective ISWM system considers how to suppress, manage and recycle solid waste in a manner that is most efficiently to protect human health and the surrounding. ISWM system requires evaluation of public wants and demands and then selecting and merging the most effective waste management activities for the proposed demands. The main ISWM activities for solid waste management are Waste prevention, Recycling and Composting, and Combustion and Removal and waste collection in a properly planned, constructed, managed and mitigated landfill areas. Each of these requires careful designing, financing, accumulation, and delivery of activities.

Question

A CMAS treatment system must be designed for a municipal wastewater and the
following operating conditions:
• Effluent flow of 0.39 m³/s leaving the primary clarifier
Effluent soluble BOD; of 310 mg/L leaving the primary clarifier
20 mg/L of soluble BOD5 allowed in the effluent from the secondary clarifier
Negligible suspended solids in the effluent from the secondary clarifier
• Volatile suspended solids concentration of 4300 mg/L in the aeration tank
• In the laboratory under log-growth conditions, the microorganisms used in the
aeration tank can convert 100 g soluble BODS into 55 g VSS
• Microorganisms in the CMAS system have a death rate constant of 0.05 d'.
Sludge age in the CMAS treatment system will be 4 days
(a) Determine the % treatment efficiency for soluble BOD; required in the CMAS system.
(b) Determine the required volume of the aeration tank (in m²) and HRT (in h).
(c) Determine the food-to-microorganism ratio (in d') and the specific substrate utilization
ratio (in d').
(d) Determine the expected rate of sludge production (in kg/d).

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