Potential, isolation, and characterization of bacteria isolates from a coal ash dumpsite for recovery of nickel from coal fly ash by Lisafitri Yuni, Kardena Edwan, Helmy Qomarudin

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Utilization of solar energy for sea water and brackish water desalination using vacuum pressure and number of trays variations by Kusumadewi Riana Ayu, Notodarmodjo Suprihanto, Helmy Qomarudin

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Integrating Electrokinetic and Bioremediation Process for Treating Oil Contaminated Low Permeability Soil by Surya Ramadan Bimastyaji, Jatnika Effendi Agus, Helmy Qomarudin

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Sulfide removal using immobilized living cell in alginate matrices in anaerobic condition by Dinasakti Nurul Mentari Okti, Helmy Qomarudin, Kardena Edwan

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A study on municipal leachate treatment through a combination of biological processes and ozonation by Yenis Septiariva Iva, Padmi Tri, Damanhuri Enri, Helmy Qomarudin

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Peat water treatment using oxidation and physical filtration system and its performance in reducing iron (Fe), turbidity, and color by Arifianingsih Nur Novilina, Zevi Yuniati, Helmy Qomarudin, Notodarmojo Suprihanto, Fujita Hirofumi, Shimayama Yoshinobu, Kirihara Masao

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