Solid Waste Management 1)Solid Waste Managment Solid wastes mainly include municipal wastes, hospital wastes, industrial wastes and e-wastes etc., The Solid wastes are dumbed in the soil which results in landscape pollution Solid Waste Management involves the collection, treatment and proper disposing of solid material that is discarded from the household and industrial activities. Methods of soild wastes disposal a) Segreation: It is the separation of different type of waste materials like biodegradable and non biodegradable and non biodegradable wastes b) Sanitary landfill :Solid wastes are dumped into low lying areas. The layers are compacted by trucks to allow settlement. The waste materials get stabilised in about 2-12 months. The organic matter undergoes decomposition. c) Incineration: It is the burning of non-biodegradable soild wastes (medical wastes) in properly co...

Sewage Management 1)Sewage Management Untreated sewage or wastewater generated from domestic and industrial process is the leading polluter of water sources in India Sewage water result in agricultural contaminatio and environmental degradation Sources of Sewage/wastewater 1) Domestic purpose or household activities 2) Dye and Textile Industries 3) Leather Industries 4) Sugar and breweries industries 5) Paper and pulp industries 2)The conventional wastewater treatment methods a) Pre-screening b) Aeration c) Sludge Management d) Water Reuse Pre-Screening a) Pre-Screening: Water generated from domestic and industrial activities is screened to remove soil and solid particulates Aeration b) Aeration: Screened watewater is then pumped to an aeration tank. Here the ...

Non Conventional (Alternative) Energy Source 1) Electrical Energy Management : Electricity or electric power is produced by generators. The generators are operated by the turbines attached to it. The turbines are rotataed by steam, moving water or wind power to produce electricity. Conservation of electrical energy: The following measures can be taken even at home and school to save electricty Use energy efficient applicances to save electricity like Compact Fluorescent Lamps (CFL), Light Emiting Diode (LED) bulbs and other electric equipments. Switch off the lights and fans, television and other electrical appliances when not in use Switch off the mobile phone chargers when not in use Maximise the use of solar radiation.Solar water heating system can be used instead of electric geysers. Minimise the use of air conditioners ...

Non Conventional (Alternative) Energy Source 1) Shale gas Shale refers to the soft finely stratified sedimentary rock that is formed from the compaction of small old rocks containing mud and minerals -such as quartz and calcite, trapped beneath earth's surface. These rocks contains fossil fuels like oil and gas in their pores. The fuel is extracted by a technique called hydraulic fracturing (drilling or well boring of sedimentary rocks layers to reach productive reservoir layers) Environmental concerns of shale gas: i) Shale drilling could affect groundwater reserves, which can contaminate the drinking water resources and also affect the fertility of the soil. ii) Million gallons of water is needed to break and release the shale gas, which inturn can affect the water table. 2)Wind energy ...

One Word Question and Answers Energy - One word test (Question 10, 11 and 12 are complusory ) 1. Which of the following is/are fossil fule - i. Tar ii. Coal iii. Petroleum a. i only b. i and ii c. ii and iii d. i, ii, and iii 2.What are the steps will you adopt for better waste management? a. reduce the amount of waste formed b. reuse the waste c. recycle the waste d. all the above 3. The gas released from vechicles exhaust are ? i. carbon monoxide ii) Sulphur dioxide iii) Oxides of nitrogen a. i and ii b. i and iii c. ii and iii d. i, ii and iii 4. Soil erosion can be prevented by a. deforestation b. afforestion c. over growing d. removal of vegetation 5. A renewable source energy is a. Petroleum...

'Environmental Management One Word Fill in the blanks Test' "மாணவர்கள் கீழே தரப்பட்டுள்ள Answer box-ல் type செய்யவும். input format may like A2, A-2, a2 or a-2 B2,B-2,b1 or b-1" No Subject1 No Subject2 A X-rays 1 Paste B Colchicine 2 Mutagen C Ligase 3 Alzheimer's disease D Stem Cell 4 Polyploidy 2) Match the following: No Subject No Sub A AK-10 1 Rice B IR-8 2 Wheat C Tricale 3 Ground nut D Shiwal 4 Cow 3)Match the following: No Subject No Sub ...

'Section A : Question 1 to 8th Fill in the blanks with true or false' 1) Biogas is fossil fuel 2) Planting trees increases the groundwater level. 3) Habitat destruction cause loss of wild life 4) Nuclear energy is a Non renewable energy 5) Overgrazing prevents soil erosion 6) Poaching of wild animals is a legal act 7) National Park is a protected park 8) Wild life protection act was established in 1972. Section B: Fill in the blanks with correct answers 9) Deforestation leads to .............. in ranifall 10) Removal of soil particles from the land is called ............. 11) Chipko movement is initiated against ............. 12) ............. is a biosphere reserve ...

Non Conventional (Alternative) Energy Source 1) Solar Energy ? Solar Energy is the energy obtained from the sun. The sun gives out vast amount of light and heat. It is only a little less than half (47%) of solar energy which falls on the atmospere reaches the earth's surface. if we could use just small part of this energy it would fulfill all the country's need for power. 2) What are Solar Energy Devices ? The Energy from the sun can be harnessed to provided power. The various devices used for harnessing sun's energy are called solar energy devices. Solar Cells : Solar Cells (Photovoltaic devies) is made up of Silicon that converts sunlight directely into electricity. Solar cell produces electricity without polluting the environment. Since it uses no fuel other than sunlight. No ha...