Waste Water Pollution

1690 Words4 Pages

1. INTRODUCTION

Fresh and clean water is essential for all life forms on earth. Humans make use of water on a daily basis for household domestic use, industry, agriculture and other use. Our economic and social well-being is therefore dependent on the availability of clean water resources as well as efficient river systems. In South Africa, it is particularly important to monitor and conserve our water resources, due to the low amount of rainfall received and the country’s classification as water stressed. However, the quality, quantity and range of services that are provided by rivers can be diminished when the health of the river is compromised.
In an effort to maintain the good condition of our rivers, wastewater works clean and purify sewage for release back into the river system once it meets the requirements for cleanliness specified in regulations set by the South African Department of Water Affairs. Proper treatment of wastewater is important to ensure that the receiving rivers into which the wastewater is discharged are not further polluted. Our rivers have the ability to cope with small amounts of pollution (assimilative capacity). However, they would be overwhelmed If the millions of litres of wastewater produced by South Africans daily were it not firstly treated before discharging back to the rivers. If wastewater is not treated adequately, negative impacts on human health and on the environment downstream of the wastewater discharge, can be observed. These impacts include harming wildlife populations (especially fish and invertebrates that live in the water), illness in people who use the river for recreational purposes (swimming and canoeing), and even contaminating drinking water sources. Pollutants commonly ass...

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... summary, the review of these literature sources indicated that inadequately treated wastewater can have a detrimental impact on the river health of the downstream environment. When the receiving river is of a poor quality upstream of the effluent discharge, there is often little impact observed downstream of the effluent discharge, but greater impacts are noted when receiving stream is in a pristine condition. Biomonitoring is considered to be an effective technique to assess these impacts since it provides a holistic, integrated measure of river health which can be used to improve community participation and management of our river systems.
3. HYPOTHESIS
The hypothesis for this research assignment is:
The effluent released from the Howick Wastewater Works has a greater detrimental effect on the downstream aquatic environment than the Darvill Wastewater Works.

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