Sewage treatment. Sewage is the mainly liquid waste containing some solids produced by humans, typically consisting of washing water, urine, feces, laundry waste, and other material that goes down drains and toilets from households and industry. Sewage treatment.
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Sewage is the mainly liquid waste containing some solids produced by humans, typically consisting of washing water, urine, feces, laundry waste, and other material that goes down drains and toilets from households and industry
Sewage is created by residences, institutions, hospitals and commercial and industrial establishments.
The material in the septic tank separates into three distinct layers:
keep the septic tank and soil absorption unit at least 100 feet away from any private well that is less than 100 feet deep, and at least 50 feet away from wells more than 100 feet deep.
In the pond, algae use solar energy to produce oxygen from carbon dioxide and water, and bacteria use oxygen to break down the remaining organics to simple molecules such as carbon dioxide and ammonia. The sun also destroys pathogenic bacteria, while the wind ensures even mixing so that all parts of the ponds are aerobic.
After secondary treatment all effluent, both solid and liquid, is sufficiently safe to be released into the environment.
To river, lake,
Disposed of in
landfill or ocean or applied to cropland,
pasture, or rangeland
Sludge drying bed
Fig. 11-29, p. 255