Browsing by Author "Bahrudin"

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    Biokonversi Limbah Cair Pabrik Kelapa Sawit Dengan Bioreaktor Hybrid Anaerob Fasa Tunggal
    (2013-05-08) Ahmad, Adrianto; Bahrudin; Zul Amraini, Said; Andrio, David
    The performance of anaerobic processes in the bioconversion of palm oil mill effluent into gaseous fuel is very dependent on the concentration of biomass. Effort to increase the concentration of anaerobic biomass can be done by using anaerobic hybrid bioreactor. The bioreactor used had 3 chambers, each divided for an up and down flow pattern and having a working volume of 2,5 m3. Several series of experiments were conducted with variable hydraulic retention time (HRT) of 1; 1,5; 2; 2,5; 3; 3,5; 4 and 5 day under room temperature conditions and continuous operation. This study uses two anaerobic hybrid bioreactors equipped with cell immobilization media. Media used in cell immobilization is a medium density form of solid palm oil mills waste, namely: empty fruit bunch and palm midrib. The results showed that the anaerobic hybrid bioreactor system was capable of converting single-phase oil palm mill effluent with a good performance, and high organic loading rate of COD removal efficiency of 84% for the bioreactor with palm midrib media and 88% for the bioreactor with empty fruit bunch media within bioconversion of one day and the stability of the bioreactor is relatively high so as to convert liquid waste into fuel gas.
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    Bioreaktor Hybrid Anaerob Dua Fasa Untuk Biokonversi Limbah Cair Pabrik Kelapa Sawit
    (2013-05-08) Ahmad, Adrianto; Bahrudin; Zul Amraini, Said; Andrio, David
    Anaerobic hybrid bioreactor configuration in converting the liquid waste content of high organic materials can be done with a single-phase configuration and two-phase configuration. In a single-phase anaerobic hybrid bioreactor, methanogenesis and acidogenesis take place in a single bioreactor. As a result it is somewhat difficult to control pH and low process stability. To overcome these weaknesses, the anaerobic hybrid bioreactor uses two phases. Condition of operation two-phase anaerobic hybrid bioreactor was conducted at room temperature and continuous. The hydraulic residence time in the bioreactor tested for acidogenesis ranged from 0.3, 0.5, 0.7, 1 day with COD loading rate ranges from 150, 100, 75 dan 50 kg/m³-day, while the hydraulic residence time in the bioreactor for methanogenesis was 1 day with COD loading rate of 50 kg/m³-day. Testing at high organic loading is done by the variable residence time the same of methanogenesis and acidogenesis bioreactors i.e 0.5, 0.7, 1 day with COD loading rate ranges from 150, 100, dan 50 kg/m³-day. The results showed that the hydraulic residence time was optimum at 1.5 days (0.5 days in acidogenesis phase and 1 day in methanogenesis phase) with a COD removal efficiency of 84 % is capable of removing COD by 92 kgCOD/m3-day with the quality of effluent at COD 8,000 mgCOD/L and the content of nutrients (NPK), which is relatively good and the acquisition of specific methane gas by 46 m3/kgCOD removed. In addition, system stability is relatively good with the ratio of volatile fatty acids and alkalinity of 0,052.
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    Pengembangan Material Termoplastik Vulkanisat Berbasis Karet Alam
    (2012-10-22) Bahrudin
    Termoplastik vulkanisat (TPV) merupakan suatu material komposit polimer yang dibuat dari campuran termoplastik (seperti polipropilena atau PP)dan elastomer/ karet, dimana komponen termoplastik adalah sebagai fasa kontiniu/matriks dan komponen karet vulkanisat adalah sebagai fasa terdistribusi.