Penurunan kadar COD (Chemical Oxygen Demand) dan konsentrasi warna limbah cair proses pewarnaan pada industri batik dengan metode proses oksidasi lanjut (Advanced Oxidation Processes)
SEMBIRING, Haesti, Dr.Ir. Sarto, M.Sc
2008 | Tesis | S2 Ilmu Kesehatan Kerja (Kesehatan Lingkungan)Latar Belakang : Keberadaan senyawa organik rantai panjang dan rantai siklik bahan pewarna dari limbah cair industri batik menyebabkan limbah ini sulit diolah dengan proses fisik maupun biologis. Senyawa pewarna ini dapat merusak nilai estetika, menurunkan kandungan oksigen dalam air, bersifat racun terhadap biota dan apabila masuk ke dalam tubuh manusia, akan merangsang tumbuhnya kanker karena zat ini bersifat cocarcinogenik. Untuk itulah maka perlu dilakukan penelitian tentang pengolahan limbah batik dengan metode kombinasi ultraviolet dengan Hidrogen peroksida (H2O2) dalam keefektifannya menurunkan kadar COD (Chemical Oxygen Demand) dan konsentrasi warna. Metode ini dikenal dengan metode proses oksidasi lanjut (Advanced Oxidation Processes). Tujuan : Mengetahui besar penurunan kadar COD dan konsentrasi warna limbah cair proses pewarnaan batik dengan variasi dosis H2O2, waktu kontak dan jumlah lampu ultraviolet dan mengetahui faktor yang berpengaruh terhadap penurunan kadar COD dan konsentrasi warna tersebut. Metode : Penelitian ini termasuk penelitian eksperimen murni, dengan jenis rancangan eksperimental ulangan atau pretest-posttest control group design, populasi dalam penelitian ini adalah limbah cair proses pewarnaan dengan indigosol yang dihasilkan oleh Home Industri Batik Plentong Yogyakarta dan sampel diambil beberapa liter dari limbah cair proses pewarnaan dengan indigosol sebelum memasuki bangunan pengolahan limbah cair Home Industri Batik Plentong Yogyakarta. Hasil dan Kesimpulan : Pada tahap penentuan dosis H2O2 dan waktu kontak optimum efisiensi penurunan kadar COD limbah sebesar 73,86% dan efisiensi penurunan konsentrasi warna limbah sebesar 71,13% dengan dosis H2O2 optimum sebesar 6 ml dan waktu kontak optimum 90 menit. Pada tahap penentuan jumlah lampu ultraviolet optimum efisiensi penurunan kadar COD limbah sebesar 62,18% dan efisiensi penurunan konsentrasi warna limbah sebesar 65,73% dengan jumlah lampu optimum sebanyak 4 buah. Dari hasil analisis dengan uji t-test diketahui bahwa terdapat perbedaan yang signifikan penurunan kadar COD dan konsentrasi warna limbah cair proses pewarnaan batik antara kontrol dan perlakuan. Pengaruh dosis H2O2 signifikan dalam menurunkan kadar COD limbah dan untuk menurunkan konsentrasi warna limbah terdapat pengaruh signifikan dosis H2O2 serta jumlah lampu ultraviolet
Background : The existence of long and cyclic chain organic compound of color element from liquid waste of batik industry, caused this waste difficult to be processed using physical and biological processes. This coloring element could destroy the aesthetic value, decreasing the oxygen contain in the water, contain toxic to the biota and when it enters human body, it could stimulate the growth of cancer as this element is carcinogenic. Therefore, it is necessary to research regarding batik waste treatment by combination method, ultraviolet and hydrogen peroxide (H2O2) in their effectiveness to reducing the COD level and color concentration. This method is known as Advanced Oxidation Processes. Objectives : The research was aimed to find out the reduction of COD level and liquid waste color element concentration from batik coloring process by various dosage of H2O2, contact time, and the amount of ultraviolet lamp and knowing the factor that affected to the reduction of COD level and the color element concentration. Methods: This was a pure experimental research or pretest-posttest control group design, and the population in this research is liquid waste in coloring process with indigosol that produced by “Batik Plentong†Home Industry in Yogyakarta, and the sample was derived from several liters liquid waste of coloring process by indigosol before enter to the liquid waste treatment installation of “Batik Plentong†home industry, Yogyakarta. Results and Conclusions : At the determination stage of H2O2 dosage and optimum contact time, the efficiency of liquid waste COD level reduction was 73.86% and reduction efficiency of color element concentration in the liquid waste was 71.13%, with H2O2 optimum dosage was 6 ml and optimum contact time was 90 min. At the determination of optimum ultraviolet lamp amount, the efficiency of COD level reduction in liquid waste was 62,18% and the efficiency of color concentration reduction was 65,73%, with optimum amount of ultraviolet lamp was 4 lamps. From analysis by t-test, it was thought, that there is significant difference in COD level reduction and color element concentration in liquid waste from coloring process between control and treatment group. There is significant influence of H2O2 dosage to reduction COD level. And there is significance influence of H2O2 dosage and ultraviolet lamp amount to the reduction of color element concentration of the liquid waste.
Kata Kunci : Kesehatan Lingkungan,Pengolahan Limbah,Kadar COD,liquid waste of batik coloring process, advanced oxidation processes, COD, color
