1.3.2. Industry: Is the main source of water pollution in the world. The effluents from industries are harmful for both human and aquatic life. Large amount of waste is released from industries such as paper and pulp industry, food processing industries, leather industries, pharmaceutical industries etc. The main contaminants are: • Lead: is a metallic substance that can cause health and environment problem and it is non-biodegradable.
Direct sources of water pollution include runoff, industrial waste, sewage, and human waste. Indirect sources include air pollution and sediment from construction sites. Industrial waste can lead to air pollution, which can ultimately lead to the pollution of water. This is also called atmospheric pollution. Atmospheric pollution is caused by pollutants such as smoke from factories entering the atmosphere and being carried to waterways.
The cause of water contamination, those chemicals, have several sources. The first source is the domestic sewage. It contains only 0.1 percent of pollutants, and 99.9 percent of water. Although it seems that the domestic sewage is somewhat harmless, the 0.1 percent of pollutants can pose a large risk on water body. The pollutants mainly comes from detergent, sanitary sewage, and waste.
Many inorganic chemicals from industry and agriculture can lead to water pollution because they contain harmful elements other than carbon and they are not easy to degrade or break down. Similar with other cities, Lishui’s industrial district builds next to river. Because businesses want to reduce the fee of effluent discharge, some industrial facilities use pipes discharging effluent directly into river. Every barber knows that effluent contains toxic elements and these elements will influence the health of human and other creatures. Agriculture also caused water pollution.
People don’t realize what’s actually in the water that he or she is doing activities in. Chemicals and oils are thrown into the water everyday by coal-fired power plants. Millions of pounds of pollutants like Mercury, cadmium, lead and other toxic metals are disposed of into our lakes, rivers, and streams. “More than 50% of all toxic water pollution comes from coal-fired power plants.” Some of these plants dump the polluted water directly into the bodies of water. Researchers found that 70% of these plants are allowed to dump these chemicals into water bodies across the country.
Industrial Sources: This includes paints, chemical and aluminum and so on that are produces in the process of manufacturing goods. 4. Sewage Treatment: Wastes that are left over after sewage has been treated, biomass sludge and settled solids. Some of these are sent directly to landfills. 5.
SEWAGE MIXING WITH RAINWATER During rains, the rainwater from roofs and higher grounds get contaminated with organic compounds, animal waste, toxic and heavy metals and soil particles etc. present in the soil during surface runoff or urban runoff. Sewage may also contain storm water and sewage systems capable of
The e-coli bacteria which is present in human waste is very dangerous and drinking this water can cause harmful side effects . Waste dumping – The dumping of wastes like paper waste, food waste, plastic, rubber, metallic and aluminum waste in heavy quantities to the water bodies is another reason of pollution. These waste types take quite time to decompose. For example, paper takes about 6 weeks, aluminum takes about 200 years and glass takes even more years. Underground storage and tube leakages - Many liquid products (petroleum products) are stored or kept in metal and steel tubes underground.
The developed regions of the world make use of numerous state of the art wastewater management and processing plants. The wastewater materials from the homes are then transferred to processing plants. In addition, these countries are making an efficient use of these sewage for irrigation purposes. The primary areas of investigations in terms of wastewater components are the rising PH levels, biological components, pathogens and other harmful materials. The PH level reported in a number of Kuwaiti regions is above 10 which indicates a high presence of industrial pollutants (Numbeo.com;
Pollution has been around for decades, for as long as the human race exists. With the migration of people and with the creation of cities the waste would pile up faster then it could be recycled by the nature. The main forms of pollution are: air pollution, water pollution and land pollution. When releasing carbon monoxide, sulfur dioxide, nitrogen oxides and so on we pollute air. The water is polluted when releasing different toxins and similar materials into the water.