Abstract
Activated and impregnated TiO2 zeolite systems to reduce TSS, BOD, and COD of tofu industrial wastewater in Cilongok Villages had been developed. Activated and impregnated zeolite systems were expected to be able to reduce the concentration of TSS, BOD, and COD. Thus, the research was aimed to know the ability of zeolite systems to reduce the concentration of TSS, BOD, and COD of tofu industrial wastewater. The research used five difference loading rates of tofu industrial wastewater which were 160, 240, 320, 400, and 480 L m-2 day-1. The most effective loading rate was determined by analyzing the concentration of TSS, BOD, and COD before and after processing using zeolite systems. The reduced concentration of TSS, BOD, and COD was determined by filling the activated and impregnated zeolite with industrial wastewater for 24 hours continuously in 30 days. Sampling was done in every 5 days with loading rate of 320 L m-2 day-1. The results indicated that zeolite systems could reduce the concentration of TSS, BOD, and COD of tofu industrial wastewater. The optimum loading rate to reduce the concentration of TSS, BOD, and COD was 320 L m-2 day-1. The efficiency of acid activated zeolite system in reducing the concentration of TSS, BOD, and COD were 83.348%, 91.899%, and 90.700%, respectively. The efficiency of base activated zeolite system in reducing the concentration of TSS, BOD, and COD were 84.380%, 93.711%, and 91.928%, respectively. The efficiency of impregnated zeolite system in reducing the concentration of TSS, BOD, and COD were 82.410%, 90.711%, and 89.917%, respectively.
Highlights
Activated and impregnated TiO2 zeolite systems to reduce Total Suspended Solid (TSS), Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) of tofu industrial wastewater in Cilongok Villages had been developed
Activated and impregnated zeolite systems were expected to be able to reduce the concentration of TSS, BOD, and COD
The research was aimed to know the ability of zeolite systems to reduce the concentration of TSS, BOD, and COD of tofu industrial wastewater
Summary
Alat-alat yang digunakan dalam penelitian ini adalah instrumen sistem terdiri dari : kotak kaca dengan ukuran 30 x 15 x 30 cm (panjang x lebar x tinggi), zeolit yang berasal dari daerah Yogyakarta deposit Gunung Kidul (dengan ukuran 1-2 mm), pipa paralon, pipa aerasi, pompa air, penampung limbah, kran air, alat-alat gelas, termometer, pH meter, desikator, pompa udara (aerator), botol Winkler, buret dan statif, oven, penangas, alat pengaduk mekanis, kertas Whatman nomor 40. Butiran zeolit direndam dengan akuades selama 24 jam pada suhu kamar, setelah itu disaring dan keringkan menggunakan oven pada suhu 110 0C. Zeolit serbuk yang telah kering direndam dengan HCl 0,1 M, disaring dan dicuci dengan akuades secara berulang-ulang dan dikeringkan dengan oven pada suhu 130 0C. Aktivasi zeolit melalui pembasaan Butiran zeolit direndam dengan akuades selama 24 jam pada suhu kamar, setelah itu disaring dan keringkan menggunakan oven pada suhu 110 0C. Zeolit serbuk yang telah kering direndam dengan NaOH 0,1M, disaring dan dicuci dengan akuades secara berulang-ulang dan dikeringkan dengan oven pada suhu 130 0C. Sistem zeolit terdiri dari tiga bak setiap bak masing-masing dari dasar sampai ke atas seluruhnya diisi dengan zeolit berdiameter 1-2 mm yang berbeda cara aktivasi dan modifikasinya yaitu melalui pengasaman, pembasaan dan impregnasi TiO2. Pipa aliran masuk berupa pipa berlubang yang dibuat dengan ukuran diameter 1,5 mm dan jarak antar lubang 5 cm, bagian pipa yang berlubang menghadap ke atas dan diletakkan di atas sistem zeolit
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