Pengolahan Limbah Cair Industri Tahu Dengan Biofiltrasi Anaerob Dalam Reaktor Fixed – Bed

Source: OAI


047022001 Penelitian untuk mengetahui pengaruh konsentrasi COD influent, hydraulic retention time (HRT) dan tinggi unggun terhadap % penurunan COD dan MLSS secara biofiltrasi anaerob dari limbah cair industri tahu telah dilaksanakan dalam reaktor fixed-bed dua tahap dengan media kerikil. Variabel operasi penelitian adalah konsentrasi COD influent (2000, 3000 mg/L dan tanpa pengenceran), HRT (12, 18 dan 24 jam) dan tinggi unggun (100 dan 125 cm). Hasil penelitian menunjukkan, bahwa peningkatan HRT berpengaruh terhadap penurunan total COD tetapi tidak terhadap MLSS. Penurunan konsentrasi COD umpan meningkatkan persentase reduksi total COD dan MLSS. Reduksi total COD dan MLSS pada tinggi unggun 125 cm lebih tinggi dibanding tinggi unggun 100 cm. Penggunaan HRT 18 – 24 jam dan konsentrasi COD influent 2000 mg/L memberikan hasil yang terbaik untuk penurunan total COD (71,94% dan 59,85% masing-masing untuk tinggi unggun 125 dan 100 cm). Sementara pada kondisi yang sama penyisihan MLSS masing-masing sebesar 81,37% dan 75,98%. Study on the effect of varying influent COD concentration, hydraulic retention time (HRT) of the reactor, and height of medium of the reactor to percentage reduction of COD and mixed liquor suspended solid (MLSS) from tofu wastewater was conducted in a two stages anaerobic biological filter reactor by using gravel packing medium. The operation variables were the COD influent (2000, 3000 mg/L and without dilution), the HRT (12, 18 and 24 hours) and the height of medium (100 and 125 cm). The results of the analysis showed that the reduction of COD was affected by HRT, while the reduction MLSS was not affected by HRT. The percentages of COD and MLSS removal were increased as well as the decrease of the concentration of COD influent. Total reduction of COD and MLSS at 125 cm bed height was higher than 100 cm bed height. The use of 18 to 24 hours HRT and the 2000 mg/L of COD influent gave the best percentage total reduction of COD (71.94 and 59.85% for 125 and 100 cm the bed height, respectively). At the same condition, the average of percentage MLSS removal was 81.37% and 75.98%. Prof. Dr. Ir. Setiaty Pandia; Dr. Halimatuddahliana, ST, MSc

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    • "Wastewater with high content of organic contaminants, reflected from COD content above 5.000 mg/L can be processed using an anaerobic digestion system (Metcalf and Eddy, 2003). Previous research (Husin, 2008), asserted that addition of 10% (v/v) microbial culture and also the process of 12, 18, and 24 hours of Hydraulic Retention Time (HRT) to tofu's wastewater, could reduce its COD content up to approximately 60%. The involved microbial culture was isolated from sludge, taken from tofu's waste effluent. "
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    ABSTRACT: This research aims to get the optimum combination of Hydraulic Retention Time and addition of inoculums in tofu's wastewater treatment using anaerobic system. Research was done using Central Composite Design (CCD) with two factors, which were Hydraulic Retention Time (12; 18; and 24 hours) and addition of inoculums (5%; 10%; and 15%). The desired responses was percentage decrease of COD, BOD, and TSS; and also increase of pH. According to CCD analysis, the best result was optimally gained on HRT 24 hours and 15% inoculums addition. Those combined factors could decrease COD up to 86. 76%, whereas the decreasing amount of BOD was up to 79.23%, and TSS was up to 67.88%. In addition to those combination, pH of tofu's wastewater increased up to 4.5. That showed that anaerobic system could reduce COD, BOD, and TSS but it couldn’t significantly neutralize pH of tofu's wastewater yet. Due to a 24-hours-anaerobic treatment, the degradation process was still in hydrolytic phase. HRT increase and additions of inoculums, as well as the usage of double treatment system (anaerobic-aerobic; aerobic-anaerobic; anaerobic-anaerobic; or aerobic-aerobic) are required to obtain optimal result.
    Full-text · Article · Dec 2015
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    Preview · Article · Sep 2012