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Aufarbeitung Ammoniak enthaltender Abwässer – Verfahrens‐ und Kostenvergleich
Author(s) -
Rautenbach Robert,
Machhammer Otto
Publication year - 1988
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330600106
Subject(s) - stripping (fiber) , ammonia , effluent , chemistry , ammonium , air stripping , wastewater , pulp and paper industry , waste management , environmental science , environmental engineering , materials science , organic chemistry , engineering , composite material
Purification of waste water containing ammonia – Comparison of proces and costs. The present case study compares three processes for reduction of ammonia in liquid effluents with respect to process engineering and treatment costs: stripping with steam, stripping with air, and liquid membrane technology. The specific purification costs are estimated for plant capacities between 1 and 50 m 3 /h, for NH 3 feed concentrations between 50 and 2000 ppm, and for waste water feed temperatures between 5 and 80ßC. Moreover, the NH 3 exiting concentration is varied between 1 and 500 ppm. In the standard case, the estimates are based on a decrease to 5 or 50 ppm NH 3 in the waste water. Two cases are considered: in one, it is assumed that the ammonium sulphate solution produced by all three processes must be evaporated down to a disposable form. Alternatively, it is assumed that the ammonium sulphate can be used without further work‐up.