<em>Galvanization is a metal coating process that is widely used in industry. The effects of this metal coating process are not entirely beneficial to society. The issue of pollution generated by the metal coating activity becomes very important. The objective of this research is to reduce Fe metal content from solid waste steel using electrolysis process with variation of pH of electrolyte solution and voltage. This research uses experimental method with test of metal content composition using X-Ray Flouresence, and Fe metal reduction using electrolysis process. This research activity used stainless steel plate as cathode and solid steel waste chunk as anode. Variations of pH of FeSO₄.7H₂O electrolyte solution used during electrolysis process are pH = 2, pH = 2.5, pH = 3, pH = 3.5 and pH = 4. Variation of electric voltage used is 3 volts, 6 volts, 9 volts and 12 volts. The result of purity level analysis of the initial Fe metal at anode was 84,48 %, while after electrolysis process there was an increase of metal purity attached to the cathode of 96,58 %. The result showed that the effect of pH variation of the electrolyte solution on the mass produced in the electrolysis process in the A₁, A₂, A₃, A₄ and A₅ samples was 0,09; 0,07; 0,02; 0,02; and 0,02 g. The greater the concentration of H⁺ of the electrolyte solution the more mass produced. In variable voltage of electricity on samples A₁₁, A₂₁, and A₃₁ mass produced that is equal to 0,14; 0,13; and 0,10 g. While the mass of A₄₁ sample did not increase in the cathode produced during the electrolysis process. The greater the voltage used in the electrolysis process the greater the mass produced.</em>

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Masih banyak pelaku usaha UMKM yang menganggap Sertifikasi Halal tidak penting dan menganggap proses pengurusan sangat rumit san sulit.  Namun jika dipandang dari segi manfaat yang besar terhadap permasalahan kepercayaan konsumen, akan meberikan imbas yang besar pada jumlah pemasukan dan omset penjualan bagi para pelaku UMKM. Meskipun bentuk perijinan lain sudah dimiliki oleh sejumlah pelaku UMKM, manun pencantuman logo Sertifikasi Halal juga tidak kalah pentingnya dalam membangun kepercayaan publik. Kegiatan pendampingan dan sosialisasi ini dilakukan untuk menanamkan pentingnya Sertifikasi Halal kepada pelaku UMKM di Kabupaten Purworejo. Dengan metode klasikal dan pendampingan secara langsung, para pelaku UMKM mendapatkan pemahaman yang lebih baik tentang manfaat dan pengurusan Sertifikasi Halal yang mudah

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Refinery wastewater is generated from the process of refining large amounts of oil. Oil refined wastewater contains micron-scaled emulsion droplets, and sub-micron droplets that are difficult to remove from water, which poses problems for researchers. Membrane technology is widely used in water treatment because it is very selective and effective in the filtration process. This research focuses on oil refinery water treatment using polysulfone (PSF) membrane ZnO nano composites modified with ultraviolet (UV) irradiation and polyvinyl alcohol. This membrane was prepared using the dry / wet phase inversion method. Then-the membrane was modified using UV irradiation and coated with polyvinyl alcohol (PVA). PSF-nano ZnO modifications have an impact on membrane performance; UV irradiation showed an increase in the value of membrane pure water flux from 4.5 Lm–2h–1 to 5.7 Lm–2h–1. However, after UV irradiation, the rejection value decreased after UV irradiation, whereas the presence of PVA as a coating agent increased the rejection value to 77.2 % for Total Dissolve Solid (TDS) rejection, 76 % for Chemical Oxyugen Demand COD rejection, and 65.3 % for ammonia rejection. This value was higher than that obtained for membranes without PVA coating, namely only 47.3 % for TDS, 51.1 % for (COD), and 29.4 % for ammonia rejection. Modifications with UV and PVA irradiation provide interrelated effects to improve membrane performance.