The purpose of this presentation is to elaborate and increase awareness on the potential solid waste (hazardous and mixed waste) disposal poses to the environment.

Waste treatment and disposal Environment impacts of solid wastes Preventive measures

Every day thousands of students buy food or drinks from canteen, those food or dinks are packed into different polythene bags, disposable plastic cups or disposable plates.

Those polythene bag, plastic cups, plates are disposed of into the garbage cans and then into environment.

Those bags and disposable things are very hazardous for environment and human life

Polythene bags, plastic cups and plates are not biodegradable.

They remain present in environment for long period.

Solid waste extract from university is openly dumped by waste management near agriculture land adjacent to university boundary.

Plastic bags don't biodegrade, breaking down into smaller and smaller toxic bits, contaminating soil and waterways and entering the food web when animals accidentally ingest them.

A plastic bag can take between 400 to 1,000 years to break down in the environment.

They also kill livestock. Toxic substances reach down with rain

water cause ground water contamination.

Continue……

Plastic containers and coatings help keep food fresh, but they can also leave behind neurotoxins such as BPA (Bisphenol A) in the human body. Waste breaks down in landfills in the form of small toxic bits to form methane, a potent greenhouse gasLittering, due to waste pollutions, illegal dumping of wastes cause Leaching: is a process by which solid waste enter soil and ground water and contaminating them.

Plastic bags slowly release toxic chemicals that has many effects on soil and crops.

Soil adsorption, soil absorb rain water with toxic substances released from polythene bags.

Plant uptake, contaminated water uptake by plants

Leaching Insects, birds, rats, flies etc.

Waste treatment Waste disposal

Incineration Solidification Heat treatment: Chemical

treatment

Landfills Underground

injection wells Waste piles land treatment

Incineration: Burning of hazardous waste.

Solidification: solid waste are melted or evaporated to produce a sand like residue.

Heat treatment: Heat applied at moderate temperature, is used in treating volatile solvents.

Chemical treatment: is the application of chemical treatment in the treatment of corrosive solid.

Landfills: waste is placed into or onto the land in disposal facilities.

Underground injection wells: waste are injected under pressure into a steel and concrete-encased shafts placed deep in the earth.

Waste piles: is accumulations of insoluble solid, non flowing hazard waste. Piles serves as temporary or final disposal.

Land treatment: It is a process in which solid waste, such as sludge from wastes is applied onto or incorporated into the soil surface.

Proper management of solid waste. Involving students and workers in plans

for waste treatment and disposal. Create awareness in students and

canteen staff. Give suggestions on different ways of

handling waste.