Nitesh Kansara , asked a question
Subject: Science , asked on 8/3/13

Describe any five modes of waste disposal?


Swati Sharma , Meritnation Expert added an answer, on 12/3/13

Five modes of waste disposal are :

  1. Incineration - it includes burning of waste
  2. Sewage Treatment- it includes treating the waste material and then discarding it in rivers or using treated water for irrigation etc. 
  3. Preparation of compost- Biodegradable waste can be converted in compost which can be then used as manure in the fields. 
  4. Landfill - The waste material is dumped under the ground.
  5. Recycling 

You can refer to the answer of your friend for details.

@ Shivangi : Good work. Keep posting!!


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Shivangi Vishwakarma , added an answer, on 8/3/13
16 helpful votes in Science
  1. Incineration-Incineration  is a  waste treatment process  that involves the  combustion  of  organic  substances contained in waste materials. [1]  Incineration and other high temperature waste treatment systems are described as " thermal treatment ". Incineration of waste materials converts the waste into  ash flue gas , and heat. The ash is mostly formed by the inorganic  constituents of the waste, and may take the form of solid lumps or  particulates  carried by the flue gas. The flue gases must be cleaned of gaseous and particulate pollutants before they are dispersed into the  atmosphere . In some cases, the heat generated by incineration can be used to generate  electric power .
  2. Sewage Treatement-Sewage treatment  is the process of removing  contaminants  from  wastewater  and household  sewage , both  runoff  ( effluents ), domestic, commercial and institutional. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants. Its objective is to produce an environmentally safe fluid waste stream (or treated  effluent ) and a solid waste (or treated  sludge ) suitable for disposal or reuse (usually as farm  fertilizer ). Using advanced technology it is now possible to re-use sewage effluent for drinking water, although  Singapore  is the only country to implement such technology on a production scale in its production of  NEWater.
  3. Preparation of Compost-Composting  is the gardener’s way to use nature’s decay of organic ingredients. It isn’t hard to do and a pile of compost will yield a rich, dark substance that improves garden soil and nurtures plants. Composting also keeps  household  garbage and yard waste out of landfills. It is the perfect recycling  activity to help you grow fruits, vegetables, flowers and shrubs. Basic backyard composting is an uncomplicated process.
  4. Landfill- landfill site  (also known as  tip dump rubbish dump  or  dumping ground  and historically as a  midden ) is a site for the disposal of  waste  materials by burial and is the oldest form of waste treatment . Historically, landfills have been the most common methods of organized  waste disposal  and remain so in many places around the world. Some landfills are also used for waste management purposes, such as the temporary storage, consolidation and transfer, or processing of waste material (sorting, treatment, or recycling).
  5. Recycling-Recycling  is a process using  materials  ( waste ) into new products to prevent waste of potentially useful materials, reduce the consumption of fresh raw materials, reduce  energy  usage, reduce air pollution (from  incineration ) and water pollution (from  landfilling ) by reducing the need for "conventional" waste disposal, and lower  greenhouse gas  emissions as compared to plastic production. [1] [2]  Recycling is a key component of modern waste reduction and is the third component of the " Reduce Reuse , Recycle"  waste hierarchy .
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