Dalam kajian ini, kesan daripada kaedah rawatan awal enapcemar yang dikeringkan yang berbeza terhadap sel bahan api mikrob (MFC) diselidik. Kajian ini meyelidik kesan kaedah rawatan awal iaitu rawatan awal secara alkali dan asid dengan nilai pH yang berbeza (9, 8, 7, 6, 5, dan 4) dalam waktu 24 jam rawatan awal. Pertama, kesan terhadap rawatan awal enapcemar dianalisa dengan larutan Permintaan Oksigen Kimia (COD) dan Asid Organik Meruap (VOA). Selepas 24 jam rawatan awal, COD dan VOA untuk alkali adalah lebih tinggi berbanding rawatan awal asid. Kedua, melalui 7 hari operasi mod kelompok, sel bahan api mikrob ruang tunggal (SCMFC) dijalankan degan enapcemar terawat (rintangan luaran - 1000Ω). Rawatan awal alkali menunjukkan penurunan SCOD sehingga 46% manakala rawatan awal asid 23%. Berdasarkan data eksperimen, ia menunjukkan maksima keluaran voltage dengan voltan litar terbuka (OCV) adalah 691mV untuk sample pH 6 yang dijana sepanjang 7 hari operasi. Nilai konduksi enapcemar terawat untuk kedua kaedah rawatan awal menurun sepanjang 7 hari operasi. Maka, data menunjukkan bahawa dengan menggunakan enapcemar terawat sebagai substrat di dalam MFC membolehkan pengurangan enapcemar dan juga penjanaan elektrik dan rawatan awal enapcemar yang berkesan dapat memperbaiki keseluruhan prestasi proses.
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In this study, influence of different method of pretreatment of dewatered sludge for microbial fuel cell (MFC) performance was investigated. This study investigated the effects of different methods (alkaline and acidic pretreatment) with varying pH (9, 8, 7, 6, 5, and 4) on 24 hours of pretreatment. First, effect of sludge pretreatment was analysed by Chemical Oxygen Demand (COD) solubilisation and Volatile Organic Acids (VOA). After 24 hours of pretreatment, COD solubilisation and VOA was higher for alkaline pretreatment and lower for acidic pretreatment. Second, with 7 days of operation at batch mode, single chamber microbial fuel cell (SCMFC) was run with pretreated sludge (external resistance - 1000Ω). Alkaline pretreatment showed a decrease of Soluble Chemical Oxygen Demand (SCOD) up to 46% meanwhile the value for acidic pretreatment was 23%. From experimental results, it was indicated that the maximum voltage generation with open circuit voltage (OCV) of 691mV at pH 6 was generated in 7 days. The conductivity of the pretreated sludge for both methods decreased during the 7 days operation. Thus, these results showed that using pretreated sludge as the substrates in MFC could achieve both sludge reduction and electricity generation, and proper pretreatment of sludge could improve the overall process.
Pretreatment of dewatered sludge formicrobial fuel cell application / Nur Fatin Syahira Rusdi