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Wastewater Treatment

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INTISARI

Limbah adalah bahan sisa dari suatu aktivitas atau proses yang sudah tidak memiliki nilai ekonomi lagi (tidak dibutuhkan atau tidak dapat digunakan lagi). Limbah dapat berasal dari aktivitas biologi makhluk hidup, industri perakitan, industri pengolahan suatu bahan, sisa-sisa penggunaan suatu barang, dan lain-lain. Limbah yang dihasilkan dari industri kimia biasanya mengandung senyawa-senyawa berbahaya yang dapat merusak keseimbangan ekosistem perairan. Hal tersebut dikarenakan bahan baku maupun sisa-sisa hasil produksi pada industri kimia tidak dapat diuraikan oleh mikrobiologi dan cenderung bersifat beracun, sehingga diperlukan penanganan khusus untuk bahan-bahan tertentu. Penanganan tersebut dapat berupa pengolahan primer, sekunder maupun tersier. Dalam penelitian ini yang dikaji adalah limbah pewarna tekstil, dimana penanganannya memerlukan pengolahan secara tersier, dengan menggunakan metode Advanced Oxidation Process dengan UV/H2O2.

Tujuan penelitian ini adalah mengkaji kemungkinan pengolahan limbah pewarna tekstil non-biodegradable dengan proses H2O2/UV di dalam bubble column photoreactor, mencari pengaruh kondisi operasi seperti konsentrasi H2O2 dan pH serta waktu tinggal limbah dalam reaktor) terhadap warna, pH, dan BOD/COD dari limbah hasil pengolahan. Manfaat penelitian ini adalah meningkatkan kualitas air buangan dari limbah industri tekstil, memberikan tambahan pengetahuan tentang pengolahan limbah tekstil, memberikan alternatif baru dari pengolahan limbah tekstil .

Penelitian yang dilakukan hanya meliputi percobaan pendahuluan dan percobaan utama yaitu pengolahan limbah dengan 4 variasi konsentrasi H2O2 pada rentang 0,05 – 2 % w/w dan 3 variasi pH, yaitu 3, 8 dan 10. Penelitian ini merupakan penelitian pendahuluan untuk mengetahui model yang tepat untuk kebergantungan laju penguraian limbah terhadap kedua variabel. Model tersebut dipakai sebagai dasar untuk menentukan desain eksperimen yang disebut response surface design yang merupakan bagian dari response surface methods bagi penelitian selanjutnya.

Abstract

Treatment for waste water especially textile waste water can be treated in many ways, by biological and physical treatment, for biological treatment, can use microorganism, and for physical treatment can do by activated carbon, textile waste water can not treated by physical and biological treatment, because of that the best treatment must do for save envitonment well, for example by Advanced Oxidation Process and inceneration. the reactive dyes are extensively used in the last years due to their superior performance, but they are environmentally hazardous. In the present work, the decolorization and degradation of commercial reactive azo dyes (Procion Navy H-exl, Procion Crimson H-exl and Procion Yellow H-exl) were studied using five advanced oxidation processes (AOPs): H2O2/UV, Fenton, UV/Fenton, TiO2/UV and TiO2/UV/H2O2. The dependence of the decolorization on the system parameters (solution pH, dye and reactants initial concentrations, and TiO2 loading) and on the presence of salts (NaCl, Na2CO3, NaHCO3, Na2SO4, NaNO3 and Na3PO4) was investigated. The decolorization (determined by spectrophotometric analysis) and the degradation (determined as TOC reduction) were compared for the different processes examined. The decolorization of the Procion H-exl solutions considered was found to strongly depend on the system parameters in all five AOPs. Although decolorization is very fast for the Fenton process and becomes even faster for the UV/Fenton process, degradation rates are relatively low for these two methods. Addition of H2O2 increases the decolorization and especially the degradation rates for the TiO2/UV process. When we use the AOP method, especially UV/H2O2 we get that uv can reduce the color of textile until the color reduced.
ABSTRACT

Waste material is residue from an activity or process that does not already have the economic value anymore (not required or can not be used again). Waste can be derived from the biological activity of living beings, industrial assembly, industrial processing of materials, the remnants of a goods, and others. Waste generated from the chemical industry usually contain compound-hazardous compound that can damage the balance of aquatic ecosystems. This is because the raw materials and the remnants of the industrial production of chemicals can not be explained by microbiology and tended to be toxic, so special handling is required for certain materials. Handling can be of primary, secondary and tertiary. In this research examined the dye waste is textiles, which require handling of the tertiary, with the use Advanced oxidation methods with UV/H2O2 Process.

Goal of this research is the possibility of processing waste coloring textiles with non-biodegradable H2O2/UV process in bubble column photoreactor, explore the influence of operating conditions such as pH and H2O2 concentration and waste time living in the reactor) to the color, pH, and BOD / COD from waste processing results. Benefits of this research is to improve the quality of the water out of the textile waste industry, to provide additional knowledge about the processing of waste textiles, providing a new alternative treatment of textile waste.

Research conducted only preliminary experiment and experiment that is the main processing waste with 4 variations of the concentration of H2O2 in the range 0.05 - 2% w / w and 3 variations of pH, ie 3, 7 and 10. This study is a preliminary research to determine the appropriate model for kebergantungan rapid decomposition of waste both variables. Model is used as a basis to determine the design of experiments is called a response surface design is part of the response surface methods for further research.

From the research that was done to note that pH optimum at pH 3 and the optimum amount of fruit is 3 lights, and the optimum rate is 4 L/s.

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