Tag: waste generation

Strong sewage contains a higher concentration of organic and inorganic matter, which increases the number of suspended and colloidal particles, thereby increasing turbidity.

Sewage water is defined as wastewater that contains various dissolved and suspended impurities originating from domestic or industrial sources.

Sewage treatment is necessary to prevent the pollution of water bodies and to protect aquatic life from the harmful effects of untreated waste.

The wastewater mixture will contain large numbers of microscopic organisms, mostly bacteria that are capable of consuming the organic component (fats, proteins, and carbohydrates) of the mixture and bringing about rapid changes in the wastewater. The solid components of wastewaters actually represent a very small part of most discharges, usually less than 0.1% by weight. However, it is this small component of the wastewater that presents the major challenges in wastewater treatment, operation, and disposal.

Residential and commercial waste streams are heavily composed of packaging materials, such as cardboard, plastics, and containers, alongside food waste.

Urea is a nitrogenous waste product that also plays a role in osmoregulation in many organisms, helping to maintain water balance.

Dissolved solids refer to the inorganic salts and small organic molecules that are completely dissolved in water and cannot be removed by simple filtration.

Contamination of water reservoir with sewage water leads to increased level of phosphate in water. Due to increased level of phosphate algae starts growing on it. This decreases the dissolved oxygen level in water thus all the aquatic lives can't survive and leads to mortality. This is called eutrophication.

Water gets contaminated due to industrial effluents, sewage water, radio biological pollutants etc. These can be purified by several techniques like electodialysis, Ion exchange chromatography, Reverse osmosis etc.

Sewage treatment constitutes of 3 stages primary, secondary and tertiary. BOD i.e biological oxygen demand decreases during secondary stage. This makes water permissible to let into natural water resources.