Tag: geography

Composting is the process of biodegrading the organic matter into simpler substances aerobically (in the presence of oxygen) or anaerobically (in the absence of oxygen) by the action of microorganisms including bacteria and fungi which results into formation of compost or humus that is a dead and decayed matter which is further used as manure and fertilizers.

Following method is considered an unacceptable (illegal) means of disposing of hazardous waste:-

• Pouring down the sink
• Placing in the regular trash
• Pouring down the storm sewer

Municipal waste consists of everyday items we use and then throw away, such as product packaging, grass clippings, furniture, clothing, bottles, food scraps, newspapers, appliances, paint, and batteries. These wastes  comes  from our homes, schools, hospitals, and businesses.

 Any type of containers, including food containers, cannot be used to contain any hazardous wastes.

The moisture content of the waste is considered as a single critical parameter for evaluating the efficiency of the bio-drying process. The moisture content influences microbial activity and biodegradation of the organic component during the bio-drying process. Despite the fact this technology is considered as a zero leachate approach, it is likely that a limited amount of free water may seep through the waste matrix and collected at the bottom of the bioreactor as leachate. Bio-drying has mostly been studied for MSW (municipal solid waste pulp and paper and, garbage residues and sewage sludge with 50–70% as the optimal initial moisture content range for the bio-drying process.

Sanitary landfill is a process of isolating the waste from the environment. The solid waste is buried in the land with proper regard that it does not dissipate in the groundwater for which synthetic sheet is used below. Then it is systematically dumped and covered by earth to prevent its effects on topsoil.

Because of air pollution in industrial areas, various gases get mixed in the air. Different acids are created when the water vapour in the air reacts chemically with these gases. Precipitation of water with dissolved acids reach the ground. Such rainfall is called 'acid rain'.

Composting is the natural way of recycling which involves bio-degradation of organic waste and turning it into organic fertilizer. In this process, various microorganisms including bacteria and fungi break down the organic matter into simpler substances. It enhances the soil nutrients and water retention capacity of soil by moderating soil temperature and maintains the pH of the soil. It suppresses plant disease by providing them adequate nutrients to absorb and make the soil fertile.

Treatment of industrial effluents can be done in three phases.

• (a) Primary treatment by mechanical means. This involves screening, grinding, flocculation, and sedimentation. 
  
• (b) Secondary treatment by biological process. 
  
• (c) Tertiary treatment by biological, chemical and physical processes. This involves recycling of wastewater.
  

1. Leguminous plants contain symbiotic bacteria called Rhizobia within nodules in their root system, producing nitrogen compounds that help the plant to grow and compete with other plants.
2.  This bacteria absorbs molecular nitrogen from the atmosphere and converts it into inorganic nitrogenous compounds which is used for organic nitrogenous compounds synthesis.
3. When the plant dies, the fixed nitrogen is released, making it available to other plants and this helps to fertilize the soil.