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双酚与皮革 - 您需要知道 您需要了解的有关此主题的所有信息都集中在一个部分中。 我们回答了如何减少皮革中双酚的暴露并应对最新的监管挑战的问题。 -
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Without doubt the beamhouse processes and in particular the liming process produces large amounts of polluting solids and waste waters.
ERHAVIT EF has been developed to be free from amines and nitrogen.
At the moment the process options to reduce this are few but the most significant in recent years is the development of the HAIR SAVING liming process. This process removes the hair intact, this intact hair can then be recovered from the vessel by recirculating the process liquor through a suitable screening filter and the liquor free of hair is returned to the drum, mixer or paddle.
This process uses the same chemicals apart from special HS grades of ERHAVIT as normal liming. However since only the roots of the hair are attacked less sulphide can be used. This reduces the sulphide load on waste water and this plus the absence of pulped hair greatly reduces the COD.
