engleski

Usporedba brodskih uređaja za obradu fekalnih voda

The impact of sewage on marine environment is a concern. Sea water can be polluted by pathogens, nutrients, detergents, pesticides and heavy metals.. These sea water are shared by community for recreation, swimming and food production, the environmental and health risks are high. Improperly treated sewage on-board can harm ecosystem. Most of the vessels has an sewage treatment system, which is designed to remove pollutants from sewage water before releasing it from the vessel to the sea. Primary sewage treatment is a relatively physical process that mainly removes solids. Secondary sewage treatment using bacteria to decomposes organic matters, and final chlorination is used for sterilization of effluent before it is released to environment. The potential pollutants remaining after secondary sewage treatment include heavy metals, nutrients and non-biodegradable organic chemicals. “Advanced sewage treatment” is a generally term covering treatment designed to remove any of these substances. A variety of types of Advanced Waistwater Treatment Systems are available. Some are better proven than others and some are more complex and expensive, depend on their size and design.

fekalnea voda; uređaj za obradu fekalnih voda; napredni uređaj za obradu fekalnih voda; hranjive tvari

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