Abstract

Pekalongan is the most famous batik city in Indonesia. UNESCO was crowned Pekalongan as the
most creative batik city. Along with the coronation of Batik city, emerging problems related to the
pollution of waste batik that ultimately damage the environment. It needs to be done fast and
environmentally friendly batik waste processing. One alternative is the processing of batik waste using
membrane technology. To know the performance of membrane nanofiltration in color allowance,
COD, BOD, TSS, and metal Pb used batik liquid waste with different concentrations. This research
was conducted to analyse the influence of pressure (4, 5, and 6 bar) against flux and the degree of
windection of each of the parameters. The optimum pressure of membrane nanofiltration for all
parameters is 6 bar. The results showed that the results of the rejection of colorants, COD, BOD, TSS
and Pb respectively without dilution, 10 times dilution, 20 times dilution, 30 times in successive
dilution is (98,29%-99.87%), (92,10-100%), (100%), (99,25-100%), ( 95,25-100%). The results
showed that the color allowance, COD, BOD, TSS and Pb Metal had fulfilled the quality standards for
the optimum pressure of 6 bar according to Ministry of Environment Regulation No. 5 year 2004 and
Local Regulations of Central Java No. 5 year 2012. Potential of membrane nanofiltration technology
can be used for the processing of batik liquid waste.
Keywords: Batik Waste, Nanofiltration, Pressur, Color