dc.description.abstract | Biotechnology development is always among one of the Country’s key developing industries. However, due to its different production process compared to general manufacturing industry, as well as its uniqueness and pluralism of its raw material usage, the biotech manufacturing process contains organic synthesis reactions、extractions, exfoliations、 and blanking …etc., and those make the waste water during the manufacturing process contains organic solvent, and raw material such as inorganic saline is also to be added during the manufacturing process, Consequently, it causes the burden of waste water treatment and inorganic saline deposit. Therefore, in order to reduce inorganic saline deposit, we should fully comprehend and check various factors affecting the water inflow quality during factory operation, including saline solvent, exfoliations and other factors.To aimed to the removal of inorganic saline in order to reach economic scale and maximize effectiveness, we shall try to prove through real experiment after obtaining raw water, to find out the most ideal level of reducing chemical sedimentation, to set up a system for the removal of high density of inorganic saline deposit in the future, and to further help the on-site operation workers control the precipitation of inorganic saline and remove the deposit more effectively. Hence we may upgrade the waste water treatment efficiency and lower the control risk in waste water treatment facilities.In this research, we’re focused on the removal of magnesium salt in the water by utilizing the chemical sedimentation. And by adding the on-site waste water that already contains high pH value as an alkalinity media to adjust the pH value, we may obtain the best pH value of 11 through the experiment of sedimentation, suspended solids, and the residual concentration of magnesium ion in the supernatant. This process works effectively by reducing the magnesium ion when the density is more than 99%. During the on-site operation, the changing range of pH value is between 10.5 and 13, therefore, we need to adjust the pH value in the magnesium salt waste water to 11 in order to get the best result. Since it’s easy to get the pH value over 12 if operating improperly and causes the operation burden, therefore, we prefer to use the second best level while pH value reaches 10, It’s easy for factories to control and adjust the pH value down to 10, as well as removing over 95% of the magnesium ion density in the existing waste water.
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