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Ammonia and total nitrogen are concerned wastewater pollutants generated in beamhouse processing of leather production. Nitrogen pollution in tannery wastewater is mainly originated from unhairing/liming, deliming and bating processes due to the removal of non-collagenous proteins and the use of ammonium salts. In this study, protease assisted hair saving unhairing/liming, non-ammonia deliming and...
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