Atmospheric pollution is caused by pollutants such as smoke from factories entering the atmosphere and being carried to waterways. Industrial waste can also create polluted runoff that collects in rivers and lakes. Another reason for water pollution is chemically treated sewage. This water carries harmful chemicals and high amounts of bacteria, which can potentially lead to serious diseases. Runoff from fields can contain chemical fertilizers and pesticides which can pollute
Water is regarded as polluted if certain substances or conditions are present to such a point that water cannot be used for specific purposes. Water is defined as the presence of excessive amounts of pollutants in water in such a way that water is no longer suitable for drinking, bathing, cooking and any other uses. Pollution is said to be the introduction of contamination into the environment. Pollution is created by industrial waste, commercial waste, agricultural activities and human activities such as transportation (Owa, 2013). Sources of water pollution According to (Owa, 2013), water pollution arises from various activities such as sewage, leakages, high population density, oil spilled, industrial waste dumped into waters, flooding
Water is a critical source used all around the world to keep our way of life flowing. The use of water goes from regular house needs to creating energy in many ways. Around the world drinkable water starting to run low and the water stored is being contaminated by pollutants causing sickness and death. Countries are going through droughts which affects the water supply needed to maintain irrigation, and public supply. Water pollution is defined as the presence in groundwater of toxic chemicals and biological agents that exceed what is naturally found in the water and may pose a threat to human health and/or the environment.
The present work will focus on significant role and potential of algae in pollutants removal from the wastewater and gives a brief review of recent development in the field of phycoremediation. 2. Heavy Metals Removal Indiscriminate industrial and domestic wastes disposal often cause the flows of heavy metal into the natural water bodies. These activities have adverse impact on living forms as some metal
This residual waste majorly comprises of solids with organic and inert in nature. Wastewater coming out of kitchen, bathroom, washing clothes etc. is known as grey water and from toilets is called as black water. The factors which contribute to variations in characteristics of domestic wastewater are daily per capita consumption of water, quality of water supply, condition and extent of sewerage system, and most important is habits/living standard of people. Composition of municipal sewage, which usually contains both domestic and industrial wastewater, may differ from place to place depending upon the type of industries and industrial establishment.
Any change in the colour of the water is an indication that water is contaminated. For example, if water is contaminated with decaying vegetation then, the water turns yellow or has a greenish tint in some cases. This is due to the presence of tannic acid which is liberated by the decaying vegetation. The water also turns yellow if it has iron contamination in it. Therefore, colour of water is an important parameter for checking the purity of water.
2. Reasons and Problems related to Wastewater Quality of water is a serious issue across the world and uncontrolled disposal of municipal, industrial and agricultural liquid, solid, and gaseous wastes poses serious threats to the sustainability. This has led to the contamination of air, water and soil along with its contribution to global warming. There are several factors which are responsible for continuous degradation of water quality like increasing population, industrialization and urbanization. As the demand of potable water is increasing, the need of treatment and safe disposal of wastewater is becoming essential to safeguard public health and reduce unbearable levels of environmental deterioration.
The existence of wastewater and the need for wastewater treatment is not a new problem. The production of excreta and urine is a natural part of human life, and has a history as long as mankind. In parallel to growing civilizations and increasing urbanity, and with the introduction of the water closet and centralized wastewater collection, problems related to large accumulations of wastewater has arisen. In centralized systems for wastewater collection one could also find other sources to wastewater than only domestic, such as storm water and industrial wastewater sources. Wastewater is generally looked upon as a negative resource, both from an aesthetic perspective and because of its characteristic bad odour, and the fact that its main component
Toxic substances and high populations of certain microorganisms can present a health hazard for non-drinking purposes such as irrigation, swimming, fishing, rafting, boating, and industrial uses. These conditions may also affect wildlife, which uses the water for drinking or as a