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14 Cards in this Set
- Front
- Back
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Source water that is pumped from wells is commonly referred to as: |
Groundwater |
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Raw water from other sources, such as rivers and lakes, is referred to as: |
Surface water |
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The system is designed to: |
Treat the raw water, remove particulates, change its chemistry to reduce chemical constituents to acceptable values, and reduce and inactivate protozoa, bacteria, and viruses that are harmful to human health.
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Typically, groundwater is low in turbidity, high in dissolved minerals, and stable in quality. It may still be treated to: |
Change the pH to make it less corrosive. Reduce nuisance minerals such as iron and manganese to acceptable limits. Eliminate unpleasant tastes and odours. Reduce toxic |
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If pre-treatment is used for ground waters, a short-duration oxidation process is usually used to: |
Precipitate dissolved mineral content so filters can be used to remove the precipitate. |
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Pre-treatment for surface source water usually removes |
Inert and organic particles, and it conditions the water for effective filtration. |
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Processes such ascoagulation, flocculation, and clarification remove: |
Large particles and other material that could reduce the performance of the filtration process. |
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The filtration stage removes: |
Any remaining particulate matter after clarification from the water and reduces the number of microscopic particles that threaten health, such as viruses, bacteria, and protozoa. |
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At the disinfection stage |
Viruses and protozoa that survive the filtration stage are killed, so that the treated potable water is safe to drink. |
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In North America, it is usual to dose extra chlorine in the water leaving a drinking water treatment facility because: |
Some chlorine is available to further protect water quality and customers. |
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In North America, it is usual to dose extra chlorine in the water leaving a drinking water treatment facility because: |
Some chlorine is available to further protect water quality and customers. |
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The extra chlorine is used |
Because there are downstream threats to water potability, such as cross-connections. |
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The quality of water leaving the plant is: |
Several checks to ensure that the finished water meets the required objectives for various parameters |
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There are typically five process stages in a wastewater treatment facility. It is through these five stages that raw wastewater is converted into a treated wastewater suitable for discharge |
Receiving and measuring Preliminary treatment Primary treatment Secondary treatment Treatment prior to discharge |
