The landfill volume required for dry solid waste generated by a food factory per year is 400 m3. After drying the wet solid waste from the factory X% of it is recycled, followed by 2.5% diversion for composting and 500 m3 for incineration, before the remainder is sent to the landfill. Using the information given below: Density of dry solid waste = 425 kg/m3 Daily generation of wet solid waste = 1500 kg Moisture content of the wet solid waste = 38% Determine X% and estimate the dimensions of the landfill site if the length:width:depth = 5:4:7. QUESTION 2. Estimate the theoretical amount of slow decomposable solid waste (C20H29O9N) required to produce 65 m3of methane (CH4) using the equation below. Assume a 75% conversion and the density of methane is 0.7167 kg/m3. Use the equation below C20 H 29 O9 N + 9H20 = 11CH4 + 9H20 + NH3 C = 12, N = 14, H =1, O = 16 QUESTION 3. Briefly discuss factors that influence the dissolved oxygen sag. Determine whether the discharge of a food factory’s untreated wastewater into the Beautiful River will reduce its dissolved oxygen (DO) level below 4.5 mg/l at New Place, 4.20 km downstream, or at any other place downstream. The relevant data are presented in the table below: Parameter Wastewater Beautiful River Flow, m3/s 0.36 0.95 Biochemical Oxygen Demand (BOD), mg/l 20.4 6.5 DO, mg/l 1.0 6.1 k1 0.05 0.05 k2 - 0.35 Velocity, m/s - 0.53 Saturation DO =7.90 mg/l ii Calculate how much the dissolved oxygen level of the wastewater should be increased in kg/day such that at any point downstream the DO is at least 5.0 mg/l (assume the BOD of the wastewater remains the same). QUESTION 4. What are the objectives of water treatment? What are the three main properties that guideline for water treatment for drinking water is based on? With the aid of a flow diagram describe water treatment for drinking purposes.

The landfill volume required for dry solid waste generated by a food factory per year is 400 m3. After drying the wet solid waste from the factory X% of it is recycled, followed by 2.5% diversion for composting and 500 m3 for incineration, before the remainder is sent to the landfill. Using the information given below: Density of dry solid waste = 425 kg/m3 Daily generation of wet solid waste = 1500 kg Moisture content of the wet solid waste = 38% Determine X% and estimate the dimensions of the landfill site if the length:width:depth = 5:4:7. QUESTION 2. Estimate the theoretical amount of slow decomposable solid waste (C20H29O9N) required to produce 65 m3of methane (CH4) using the equation below. Assume a 75% conversion and the density of methane is 0.7167 kg/m3. Use the equation below C20 H 29 O9 N + 9H20 = 11CH4 + 9H20 + NH3 C = 12, N = 14, H =1, O = 16 QUESTION 3. Briefly discuss factors that influence the dissolved oxygen sag. Determine whether the discharge of a food factory’s untreated wastewater into the Beautiful River will reduce its dissolved oxygen (DO) level below 4.5 mg/l at New Place, 4.20 km downstream, or at any other place downstream. The relevant data are presented in the table below: Parameter Wastewater Beautiful River Flow, m3/s 0.36 0.95 Biochemical Oxygen Demand (BOD), mg/l 20.4 6.5 DO, mg/l 1.0 6.1 k1 0.05 0.05 k2 - 0.35 Velocity, m/s - 0.53 Saturation DO =7.90 mg/l ii Calculate how much the dissolved oxygen level of the wastewater should be increased in kg/day such that at any point downstream the DO is at least 5.0 mg/l (assume the BOD of the wastewater remains the same). QUESTION 4. What are the objectives of water treatment? What are the three main properties that guideline for water treatment for drinking water is based on? With the aid of a flow diagram describe water treatment for drinking purposes.

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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The landfill volume required for dry solid waste generated by a food factory per year is 400 m³. After drying the wet solid waste from the factory X% of it is recycled, followed by 2.5% diversion for composting and 500 m³ for incineration, before the remainder is sent to the landfill. Using the information given below:

Density of dry solid waste = 425 kg/m³

Daily generation of wet solid waste = 1500 kg

Moisture content of the wet solid waste = 38%

Determine X% and estimate the dimensions of the landfill site if the length:width:depth = 5:4:7.

QUESTION 2.

Estimate the theoretical amount of slow decomposable solid waste (C₂₀H₂₉O₉N) required to produce 65 m³of methane (CH₄) using the equation below. Assume a 75% conversion and the density of methane is 0.7167 kg/m³. Use the equation below

C₂₀H ₂₉O₉N + 9H₂0 = 11CH₄ + 9H₂0 + NH₃

C = 12, N = 14, H =1, O = 16

QUESTION 3.

Briefly discuss factors that influence the dissolved oxygen sag.
Determine whether the discharge of a food factory’s untreated wastewater into the Beautiful River will reduce its dissolved oxygen (DO) level below 4.5 mg/l at New Place, 4.20 km downstream, or at any other place downstream. The relevant data are presented in the table below:

Parameter	Wastewater	Beautiful River
Flow, m³/s	0.36	0.95
Biochemical Oxygen Demand (BOD), mg/l	20.4	6.5
DO, mg/l	1.0	6.1
k₁	0.05	0.05
k₂	-	0.35
Velocity, m/s	-	0.53

Saturation DO =7.90 mg/l

ii Calculate how much the dissolved oxygen level of the wastewater should be increased in kg/day such that at any point downstream the DO is at least 5.0 mg/l (assume the BOD of the wastewater remains the same).

QUESTION 4.

What are the objectives of water treatment?
What are the three main properties that guideline for water treatment for drinking water is based on?
With the aid of a flow diagram describe water treatment for drinking purposes.

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