Indsutry Wastewater Processes in Trinidad and Tobago

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In Trinidad and Tobago there are many companies that produce wastewater due to many different reasons. Some such companies that are known to produce wastewater are Carib Brewery Ltd, Coca Cola, Nestle and BP also known as British Petroleum. Some companies have different methods which they use to treat their wastewater to be able to reuse it or release it back into streams as an acceptable standard of quality. After doing my research it has to be noted that not all companies have a standard method or process to deal with their wastewater which they produce. Wastewater is any water that has been adversely affected in quality by anthropogenic influence. It comprises of liquid waste discharged by domestic residences, commercial properties, industry, and/or agriculture and can encompass a wide range of potential contaminants and concentrations. Any type of wastewater that passes through a sewer can be referred to as sewage. Wastewater can be categorized by different groups. These groups are domestic, municipal, commercial and industrial wastewater and non-point sources. There are two major types of wastewater treatments which are biological and physical/chemical treatment. BP is a company that has a process which is used to treat wastewater. BP’s Trinidad and Tobago Refinery uses water at every stage of the refining process. Cooling hydrocarbons is one of the most common uses of water, however water is also used for other purposes such as cleaning the ships. Once water had come in contact with hydrocarbons or other contaminants it is classified as “waste water”. The Trinidad Refinery operates two systems for cleaning water prior, one of which is a multi-stage Waste Water Treatment Plant. There are diffe... ... middle of paper ... ... Activated Sludge Unit for retreatment. Once water is cleaned to the appropriate standard it is discharged to WASA’s municipal wastewater treatment system. Salt water used as cooling water is not contaminated under normal circumstances, so is subject to a different treatment process. The heated water passes through three separators during which time it cools down prior to discharge. If oil is visible in any cooling water, actions are taken to isolate the source of the leak. Each step of the wastewater treatment process is monitored and data recorded optimize the treatment process. Samples of the treated wastewater, taken by automatic samplers, are analyzed for hydrocarbons, phenolic, sulfides, heavy metals, nitrogen, pH, temperature etc. The results are recorded and reported to the EMA, who are the regulating body for the refinery’s environmental license.

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