Wastewater treatment and technologies reviews PDF

Running head: WASTEWATER TREATMENTS AND TECHNOLOGIES REVIEWS 1
Wastewater Treatments and Technologies Reviews
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Abstract
In recent days, it is noted that the water resources
have been prone to the pollutant sources. These
pollutants sources mainly termed as the
anthropogenic and they tend to include industrial
process, households as well as the agricultural
wastes. Moreover, the public has been affected by
the norm and tend to form the essential grounds for
the appraisal of the environmental impacts in line
with wastewater pollution. Conventional wastewater
treatment method is regarded as one of the
fundamental techniques often applied in treating the
wastewater. The method mainly involves chemical
coagulation, activated sludge as well as adsorption
process. Although, the process mainly regarded to
have the significant importance it still has some
limitations more so in line with the overall operation
costs. On the other hand, there is the application of
the aerobic wastewater treatment approach, and the
concept continues to receive numerous acceptances
grounded on it minimal costs regarding the
operations as well as the maintenance costs.
Furthermore, aerobic wastewater treatment mainly
regarded by many people because the raw ingredients
are easy to obtain, have good effectiveness as well as
their overall degradation ability in line with the
contaminants recommended. Thus, this paper aims to
appraise the wastewater treatment as well as the
technologies in line with the removal of the
wastewater contaminants. Some of the pollutants
which the study focuses on include the hydrocarbons
compounds, dyes, heavy metals, pesticides as well as
herbicides. The elements under the discussions often
regarded as the paramount and essential contributors
to the wastewater pollutions.
Introduction
Human activities mainly require the supply of clear
water is free from any significant pollutants such as
the heavy metals. Human activities not only need this
water for their establishments but also their overall
diverse maintenance. Furthermore, it is evidential
that water resources are the essential ingredient
which offers valuable food provisions via agriculture
irrigation production as well as the support of aquatic
life [1].
Wastewater Trends in the

WASTEWATER TREATMENTS AND TECHNOLOGIES REVIEWS 2
World
The trends in line with the wastewater across the
world mainly summarized as indicated in the
illustration below. The forecast analysis principally
recorded between 2010 to 2015 and have immense
advantages in the total market segmentation [2].
Figure Illustrating the Wastewater Forecasts in line
with the World Trends [3]
Biochemical Oxygen Demand
It is defined as the oveall amount of the makeable
oxygen required for the breaking down of the
existing organic materials prevailing in the
wastewater. The oxygen present in the sample often
aids the processes of the biological organisms by
assisting them in the overall procedures of breaking
down the complex compounds into simple ones.
However, the overall process must be maintained at a
certain temperature and has to last for a makeable
period. Notable, the expression of the biological
oxygen demand is regarding the oxygen consumed
milligrams per sample liters incubated for 5 days.
The analysis regarding the biochemical oxgyen
demand mainly illustrated as indicated in the
illustration below [4].
Figure Showing the Biochemical Oxygen Demand
for Wastewaters [4]
However, it is noted that there is high number of the
liquids as well as the overall wastes which are
produced by the different industries and human
settlements. These tend to affect the world in one
way or the other in as far as the water sources are
concerned. Thus, the analysis regarding the pollution
and the human activities as well as settlement mainly