Air pollution, noise pollution and solid waste management a) Historically what were the ingredients for major...

 

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Air pollution, noise pollution and solid waste management a) Historically what were the ingredients for major air pollution events? b) Two construction sites A and B produce different noise levels as shown in Table 2. Calculate the resulting sound level and identify the site which produces high sound level? (4+2 marks) Table 2: Sound level produce by two different construction site Construction Site A (sound levels in dB) 60 63 64 66 Construction Site B (sound levels in dB) 61 62 62 63 c) Determine the size of the trucks and the number of the trucks required to collect the residential solid waste generated from a city of population 40,000 using the following data. The average. solid waste generation rate is 1.12 kg/person.day and the average uncompacted density is 134.7 kg/m³. Each residence has one pickup per week and that there will be no rear-of-house pickups. • Average residential occupancy = 4/residence • Maximum number of cans per stop=2 at 0.0757 m³/can • Truck compactor density rating =490 kg/m³ • Truck unloading time = 8.5 min • Delay time = 30 min • Distance to disposal site =30 km • Average hauling speed = 45 km/h • Number of trips to disposal site = 1/d • Time between pickup stops = 20 s • Dump time (regression coefficient 'a') = 12.6 s/can • Number of working days = 7 d/week • Standard side loading compactor truck capacities (all in m³): 9.0, 10.0, 12.0, 14.0, 15.0, 18.0 •Total break time = 30 min/d Air pollution, noise pollution and solid waste management a) Historically what were the ingredients for major air pollution events? b) Two construction sites A and B produce different noise levels as shown in Table 2. Calculate the resulting sound level and identify the site which produces high sound level? (4+2 marks) Table 2: Sound level produce by two different construction site Construction Site A (sound levels in dB) 60 63 64 66 Construction Site B (sound levels in dB) 61 62 62 63 c) Determine the size of the trucks and the number of the trucks required to collect the residential solid waste generated from a city of population 40,000 using the following data. The average. solid waste generation rate is 1.12 kg/person.day and the average uncompacted density is 134.7 kg/m³. Each residence has one pickup per week and that there will be no rear-of-house pickups. • Average residential occupancy = 4/residence • Maximum number of cans per stop=2 at 0.0757 m³/can • Truck compactor density rating =490 kg/m³ • Truck unloading time = 8.5 min • Delay time = 30 min • Distance to disposal site =30 km • Average hauling speed = 45 km/h • Number of trips to disposal site = 1/d • Time between pickup stops = 20 s • Dump time (regression coefficient 'a') = 12.6 s/can • Number of working days = 7 d/week • Standard side loading compactor truck capacities (all in m³): 9.0, 10.0, 12.0, 14.0, 15.0, 18.0 •Total break time = 30 min/d

Answer rating: 100% (QA)

A Air pollution is a gas or a liquid or solid dispersed through ordinary air released in a big enough quantity to harm the health of people or other animals kill plants or stop them growing properly d... View the full answer