A Comparative Study of Aerobic and Anaerobic Wastewater Treatment
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 5
Abstract
As it is widely known and accepted, water is an essential and basic human need for urban, industrial and agricultural use and has to be considered as a limited resource. Only 1% of the total water resources in the world can be considered as fresh water and by 2025 it is estimated that nearly one-third of the population of developing countries, will live in regions of severe water scarcity. As a result, the amount of water used in irrigation has to be reduced, in order for the domestic, industrial and environmental sector to survive. Around 1.2 billion people, or almost one-fifth of the world's population, live in areas of physical scarcity and 500 million people are approaching this situation. Another 1.6 billion people or almost one quarter of the world's population, are facing economic water shortage. Water use is growing at more than twice the rate of population increase in the last century, and, although there is no global water scarcity as such, an increasing number of regions are chronically short of water. In this aspect to avoid the water demand at the global level water conservation strategies should be developed. Among the water conservation strategy, wastewater treatment is one of the major pathway about the decreasing the water demand in the agricultural sector and for domestic uses except drinking. In all the major cities, wastewater treatment plants have been constructed to treat the urban wastewater in view of decreasing the water scarcity. The presence of nutrients in the wastewater is considered as beneficial to agricultural practices. The contaminants present in the wastewater pose health risks directly to agricultural workers and indirectly to the consumers as the long term application of the wastewater may result in the accumulation of toxic elements in soil and in plants. In the present study an attempt has been made to study the comparison between aerobic and anaerobic (UASB reactor) treatment of wastewater and also heavymetal concentration was studied with the analysis of wastewater/sullage water. The presence of Nitrate, Phosphate and Potassium (NPK) indicates the nutrient level in the wastewater and these nutrients will be beneficial for the use of agricultural field and it can minimize the water scarcity for agriculture purposes. The analyzed parameters showed higher amount of COD and BOD in untreated wastewater, which exceed the CPCB permissible limit for disposing the sullage water on land for irrigation.
Authors and Affiliations
Shiva Kumar. D, Srikantaswamy. S, Abhilash. M R, Nagaraju. A
Keywords
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