Final answer:
Effluent is the treated water released from wastewater treatment facilities, usually discharged into rivers and streams. It goes through various treatment processes to minimize environmental impact, and tertiary treatment may be used for sensitive ecosystems. Option d
Step-by-step explanation:
The effluent, or treated water exiting a wastewater treatment facility, is usually discharged into local rivers, streams, or the ocean.
This water, after undergoing primary, secondary, and sometimes tertiary treatment, is cleared of solids and contaminants and can be used for irrigation, landscaping, or released back into the natural environment with minimal environmental impact.
Tertiary treatment, also known as effluent polishing, is an additional cleaning process for the water when it is discharged into a sensitive ecosystem. This step ensures that the water is of high enough quality that it does not harm the environment.
Globally, the need for proper wastewater treatment is critical, as half of all wastewater is discharged, partially or wholly untreated, leading to potential pollution problems. Effective wastewater treatment and infrastructure are essential for preserving fresh water and preventing waterborne diseases. Option d