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Activated Sludge Essay

1130 Words5 Pages

WASTE GENERATION
Wastes from chemical plant may bring some impacts to the environment and this is a very important aspect to be considered. Therefore, in order to ensure that the wastes produced and discharged to the environment, either to the surface of water or to the air are harmless to the environment and residents that live near the plant, a proper handling of the formation and treatment, as well as the disposal of the waste must be implemented and follows the standards and regulations that had been set by the Malaysian Government.
The treatment of chemical plant wastes may sometime be very costly but, it must be prioritized due to its potential impacts on the environment. As for methanol plant that produces 4x105 metric tons per year …show more content…

The principle of activated sludge process is that it uses microorganisms to feed on organic contaminants (methanol) in wastewater, producing a high-quality effluent. The basic principle behind all activated sludge processes is that as microorganisms grow, they form particles that clump together. These particles (floc) are allowed to settle to the bottom of the tank, leaving a relatively clear liquid free of organic material and suspended solids. The resulting settled solids, the activated sludge will be returned to the first tank to begin the process again.
This method is unsuitable for wastewater that contains high concentration of methanol because it will inhibit the growth of bacteria due to its toxic property. However, since the effluent of the distillation column has a purity of 99.96%, this means that the wastewater produced only contain small concentration of methanol, thus, suitable to be treated using activated sludge method. Bacteria can adapt themselves in wastewater with concentration up to 5% within the sludge solution but they will undergo growth reduction when the concentration of methanol is greater than 5% within the sludge tank (Al-Dawery,

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