This PPT should be used as reference only. Reading books (mentionedin syllabus) is mandatory for the preparation of the examinations.Disposal of solid waste Sanitary landfill Garbage is spread out in thin layers, compacted and covered with clay/plasticfoam Bottom is covered with impermeable linings to prevent the percolation ofleachates. When the landfill is full, it is covered with clay, sand and gravels Monitoring wells are drilled near the landfill area Landfill gas (Methane) is produced. Composting It is done due to the shortage of landfill area Decomposed in oxygen-rich medium Nutrient rich manure is produced Incineration Burning of waste in very high temperature Initial cost is very high Dioxin, furan, lead, cadmium etc. can be released. So, battery or plastics should be removedbefore burning12/03/19This PPT should be used as reference only. Reading books (mentionedin syllabus) is mandatory for the preparation of the examinations.Noise Pollution Noise: Unpleasant/ unwanted sound Noise pollution: The noise propagates through the atmosphere thatleads to discomfort and health hazards is known as noise pollution. Noise measurement is expressed as Sound Pressure Level (SPL) SPL is a logarithmic ration of sound pressure to a referencepressure. International reference pressure is 2 X 10 -5 Pa. (average thresholdof hearing) Unit of SPL is decibel. Threshold of pain is 130 dB Types of noise: Continuous, Intermittent, Impact/Impulsive12/03/19

The given text provides information on the disposal of solid waste and noise pollution. Here is a step-by-step breakdown of the information provided:

Disposal of solid waste:

1. Sanitary landfill: Garbage is spread out in thin layers, compacted, and covered with clay or plastic foam.
2. The bottom of the landfill is lined with impermeable materials to prevent leachate percolation.
3. When the landfill is full, it is covered with clay, sand, and gravel.
4. Monitoring wells are drilled near the landfill area to monitor any potential environmental impacts.
5. Landfill gas, specifically methane, is produced during the decomposition process.

Composting:

1. Composting is done when there is a shortage of landfill space.
2. Waste is decomposed in an oxygen-rich environment.
3. This process produces nutrient-rich manure.

Incineration:

1. Incineration involves burning waste at very high temperatures.
2. The initial cost of incineration is high.
3. However, it should be noted that burning certain materials like batteries or plastics can release harmful substances such as dioxin, furan, lead, and cadmium.

Noise Pollution:

1. Noise is defined as unpleasant or unwanted sound.
2. Noise pollution refers to the propagation of noise through the atmosphere, leading to discomfort and health hazards.
3. Noise is measured using Sound Pressure Level (SPL), which is a logarithmic ratio of sound pressure to a reference pressure.
4. The international reference pressure is 2 X 10 -5 Pa, which is the average threshold of hearing.
5. SPL is measured in decibels (dB).
6. The threshold of pain is typically around 130 dB.
7. Types of noise include continuous, intermittent, and impact/impulsive noise.

Please note that this response is a step-by-step breakdown of the information provided in the text.