Application of the water source diagram procedure (WSD) for freshwater minimization in a batch process
Special Symposium - Environmental Protection & Sustainability
Environmental Protection & Sustainability - II
Keywords: water minimization, batch process, recycle, reuse, water source diagram procedure
This paper presents the water source diagram procedure (WSD) for freshwater minimization required in batch process for a specific industrial case. The study of this case was solved for four different scenarios with the following constraints: fixed outlet stream concentration without reusable water storage, fixed inlet water quantity of an operation without reusable water storage, fixed outlet stream concentration with reusable water storage, fixed inlet water quantity of an operation with reusable water storage. The WSD procedure is commonly applied for freshwater minimization in continuous processes. In order to use WSD procedure for batch processes it was necessary to consider the constraints involving the stream concentrations and the time interval from each operation. The same case was also solved by a graphical technique, given in literature, where stream concentration is taken as first constraint and time dimension as secondary constraint. The wastewater minimization was achieved in both techniques through the exploitation of recycle and reuse opportunities, as well as the use of reusable water storage. The results obtained by the application of both techniques were identical, showing that WSD can also solve satisfactorily batch process problems.
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Presented Monday 17, 12:15 to 12:35, in session Environmental Protection & Sustainability - II (S-7B).
