Sewage Water Quality Requirements Should Be Broken Down Into % Essay

Sewage Water Quality Requirements Should Be Broken Down Into % Essay

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Sewage can be broken down into 99.9% as water and 0.1 % as solids. 70% of the solids is organic substance (protein, carbohydrate, and fats) and another 30% is inorganic (grits, salts, and metals) and that is a typical municipal wastewater analysis. Based on this, chemical and bacteriological components of the treated/discharged effluent into receiving water body should be monitored to ensure the safety of the public health according to the effluent limitations (NPDES/AZPDES permits). Therefore, a TMDL will have to identify the amount of an exact or property of a pollutant weather from point, nonpoint, or natural sources that may be discharged to a water body and still ensure that the water body gains water quality standards. However, among the water quality parameters of the effluent that should be taken care of or are wastewater contaminants that are of concern; oxygen consuming organic substance which normally known as biodegradable organic (protein, carbohydrate, and fats) and measured by BOD (for municipal wastewater) or COD (for industrial wastewater). BOD/COD has direct relation with dissolved oxygen level (DO) for the receiving water body, as the bacteria will consume the organic substance for food and (DO) for energy / respiration and lead to strip the natural oxygen resources and without oxygen the aquatic organisms will not survive. Nutrients, which they are carbon, nitrogen, and phosphorous .The uncontrolled amount or manner of the nutrients in the discharged effluent will cause water pollution and lead to growth of adverse aquatic life (such as algae) and eutrophication, siltation, increase the sedimentation, and (DO) depletion as the nutrients biodegraded and recycled by the naturally occurring bacteria in the receiv...


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...e influent flow out of the secondary clarifier into the disinfection chamber, typically by using the chlorine and this the final step before discharge of the effluent. The disinfection process can remove more than 99 % of all the impurities from sewage, giving an effluent of almost drinking water quality. Some environmental authorities raised up the concern of the chlorine residuals in the effluent. Thus, some alternative procedures had been added to avoid the chlorine toxicity such as using UV light. Besides, some modification had been added to the conventional secondary treatment plant in order to remove phosphorus and nitrogen and the pharmaceuticals substance from the effluent before the final discharge. However, at this point of the final treatment process, water quality samples will be taken for (BOD), (TSS), (NH3-N), Phosphorous, pH, (DO), and Fecal Coliforms.

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