Biyosid Uygulamalı Giysilik Deri Üretiminde Tabaklama ve Sonrası Yaş İşlemlerde Mikrobiyal Yükün Tespiti Üzerine Bir Araştırma

Abstract

In the present research, it was aimed to determine the numbers of total fungi (yeast and mold), proteolytic fungi and lipolytic fungi; total aerobic mesophilic bacteria, proteolytic bacteria, lipolytic bacteria and aerobic sporeforming bacteria that are likely to grow in the floats of chrome tanning, neutralization and post-tanning operations (retanning – fatliquoring - dying) in different concentrations of NaCl (0, 5, 10 %). Raw domestic sheep skins were used in the study. While the skins were being processed in soaking and chrome tanning, a commercial bactericide composed of quaternized ammonium compounds and benzothiazole-based fungicide were added respectively. For control, the skins were processed without addition of any bactericide or fungicide. According to results, no bacterial growth was detected in the floats investigated, while some amount of fungal growth was determined. The numbers of total fungi in the chrome tanning and neutralization processes were determined to be between 1,1x101 and 7,0x101 cfu/mL. No total fungi weredetected in retanning – dyeing fatliquoring float; besides, proteolytic and lipolytic fungi were detected in all process steps including retanning – dyeing - fatliquoring. The numbers of the proteolytic fungi were determined to be between the values 1,0x101 and 8,0x101 cfu/mL and those of lipolytic fungi to be between the values 1,0x101 and 7,0x101 cfu/mL