Question

essay about waste water​

Answer 1

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Answer 2

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$\huge\bold{Waste\ Water}$


Wastewater refers to the spent water that is discharged by sources such as domestic (homes), commercial (shopping malls), industrial (factories), infiltration and inflow (pipes) and stormwater (excessive rainfall/snow melts). It consists of 99% of water and 1% waste. Depending on the sources, the wastes may include organic matter (human faeces), detergents, heavy metals, solid matter, microorganisms and floating debris among others. Sewer systems involving drains, pipes, and pumps then carry the wastewater to a treatment facility.
Wastewater treatment plants are very important. Their role is to remove as much as possible the amount of pollutants and solids from the wastewater, restore its pH and disinfect it before discharging in water bodies such as rivers and seas. This process is carried out within technical and financial feasibility. Therefore, the treatment of wastewater is primordial; otherwise, the polluted water will infect fresh water bodies, disrupting their ecological balance and endangering the flore and fauna.
Furthermore, processes taking place in wastewater treatment plants pertain to physical, chemical and biological methods. The latter involve the use of harmful substances which can cause damage to the Health and Safety of the workers. The existence of hazardous substances at work does not only affect the workers' health; depending on the effect of the illness, it may significantly reduces their capacity to respond to external situmili thereby preventing them to carry out their duty at an optimum level .As such, this can lead to industrial accidents (Chatziioannou, 2012).
As a matter of fact, the risk factors are:
' Physical
This involves risks involving the layout and infrastructure of the wastewater treatment plant such as confined spaces, faulty electrical equipment, slippery surfaces, collapse of guard rails.
' Chemical
It pertains to the use of chemicals and emission of harmful gases such as hydrogen sulphide, ammonia along with the use of chlorine for the treatment of the wastewater.