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All Journal Jurnal Kimia Terapan Indonesia Jurnal Purifikasi Jurnal Serambi Engineering
Djaenudin Djaenudin
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Environmental Science Materials Science & Nanotechnology

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PEROLEHAN KEMBALI PERAK DARI LIMBAH SISA ANALISIS COD MENGGUNAKAN METODA ELEKTROLISIS Djaenudin Djaenudin; Mindriany Syafila
Purifikasi Vol 10 No 1 (2009): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v10.i1.163

Abstract

The spent COD test solution has unique characteristics, i.e. small in volume and discontinued in production. However, it contains hazardous elements to environment such as heavy metals, i.e. silver, mercury, iron, and chromium, which could be having an economic value if can be reused. This research was subjected to the recovery of silver element the spent COD test solution using electrolysis method. The anode used was made from platinum sized 1 x 1 cm2, whereas copper was used as the cathode. The optimum silver recovery using the artificial waste of Ag2SO4 was 19.93% and the reaction rate constant value (k) was 0.0363 /minute from initial silver concentration of 199.375 mg/L to became 159.64 mg/L. This result was obtained on the experimental conditions of 5 cm electrode distance, 1 x 3 cm2 cathode surface area and DC supply voltage of 6 volt. The experiment using the spent COD test solution was carried out at electrode distance of 5 cm, cathode surface area of 1 x 3 cm2 and DC supply voltage of 6 volts. The silver recovery was 47.19% from initial silver concentration of 204.375 mg/L to be 107.92 mg/L and the reaction rate constant value (k) was 0.1053 /minute. The results showed that the increasing in DC supply voltage and the reducing in the electrode distance would increase the silver recovery.
Enkapsulasi Probiotik Lactobacillus sp.Menggunakan Dua Tahap Proses Rintan Fransiska Trimudita; Djaenudin Djaenudin
Jurnal Serambi Engineering Vol 6, No 2: April 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i2.2883

Abstract

The Lactobacillus sp. a probiotic microorganism that can’t to survive gastric acidity and the concentration of bile salts in the gastrointestinal tract. Probiotic encapsulation is one of the methods to protect probiotic during processing process, storage, and from acidic solutions in the gastrointestinal tract. The research was to know that viability was encrypted with an alginat matrix and we were against testing in simulated stomach acid. In this research, the encapsulation process was conducted by mixing Lactobacillus sp. with Na-Alginate to form a suspension as encapsulation material. The microcapsules formed were coated with chitosan with concentrations i.e., 1.2%; 1.6%; and 2%. Lactobacillus sp. encapsulated chitosan matrix was tested for its viability in gastric fluid simulation (0,2% NaCl pH 1,2 and 3) for 1 minute, 60 minutes and 120 minutes using the TPC method (Total Plate Count). After the viability test, Lactobacillus sp. encapsulated with 2% chitosan could maintain the viability lactobacillus sp with the number of colony was of 7,41 log Cfu/gram in the simulation of gastric acid fluid pH 3 for 120 minutes, and 4,78 log Cfu/gram in the simulation gastric acid fluid  pH 1,2 with duration 120 minutes.  
Recovery Kitin Dari Limbah Cangkang Rajungan Muhammad Hazqil Kadzim; Djaenudin Djaenudin; Etih Hartati
Jurnal Serambi Engineering Vol 5, No 4 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i4.2321

Abstract

The small crab animal is important for the fisheries sector in Indonesia, but usually the small crab industry only takes meat and allows the crab shell to become a pile of waste.  To reduce the potential for pollution caused by a small crab shell waste, the waste can be reused to obtain chitin.  Small crab shell waste still contains quite a lot of chemical compounds, including protein, minerals (CACO), and chitin.  The study conducted chitin extraction with a process preceded by deproteination and then demineralization.  Chitin was characterized using Fourier Transform Infra Red (FTIR) and Scanning Electron Microscopy (SEM).  The results showed that chitin was successfully extracted from the small crab shell through the deproteination and demineralization process with FTIR l, which results the characteristic spectrum of chitin compounds such as waves of 3433 cm 'for -OH, -NH groups.  The absorption around the wave number 3433 cm occurs because of the overlap between the absorption -NH and -OH and the wave number 701 cm 'for the b-1,4-glycosidic group.
Penyisihan Krom pada Pengolahan Air Limbah Penyamakan Kulit Menggunakan Metode Elektrokoagulasi Lina Hasyyati; Etih Hartati; Djaenudin Djaenudin
Jurnal Serambi Engineering Vol 5, No 4 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i4.2317

Abstract

Tanning is the process that converts animal hides and skin into stable and imputrescible products called leather. The production processes in a tanning use chromium sulfat. Chrome metal is a heavy metal that is toxic, so the waste water from the leather tanning process will pollute the environment if it is not treated. In this research, wastewater treatment is used by electrocoagulation method to determine the effect of operating on the chromium removal to obtain optimal conditions. In this study, electrocoagulation experiments were using aluminum electrodes. Electrocoagulation process was carried out in 9 variations with parameters pH, electrical current and time where pH was set at pH 7. Electrical current done on 0.5 A, 1 A, and 1.5 A. Time done in 1 hour, 2 hours and 3 hours. The experiment results were analyzed by comparing the concentration before processing and concentration after processing to obtain efficiency. Based on the experimental result on 9 variations, the variation that has the highest efficiency is at electrical current 1.5 Ampere and time 3 hours. This variation can remove 78.95 % chrome concentration from 245.1 mg/L to 51.6 mg/L.
PEMANFAATAN SISTEM MICROBIAL FUEL CELL DALAM MENGHASILKAN LISTRIK PADA PENGOLAHAN AIR LIMBAH INDUSTRI PANGAN Herlian E. Putra; Dani Permana; Agusta S. Putra; Djaenudin Djaenudin; Hari R. Haryadi
Jurnal Kimia Terapan Indonesia Vol 14, No 2 (2012)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.503 KB) | DOI: 10.14203/jkti.v14i2.341

Abstract

Microbial Fuel Cell (MFC) dapat langsung menghasilkan listrik dari oksidasi bahan organik yangterkandung dalam suatu larutan. Dibutuhkan suatu optimalisasi sistem MFC yang mencakup beberapa faktoruntuk meningkatkan hasil listrik seperti jenis media penukar kation, elektroda, luas permukaan elektroda, dandurasi reaksi. Penelitian dilakukan untuk melihat kinerja sistem MFC pada pengolahan air limbah industripangan, dalam  hal ini tahu  dan cucian beras (catering),  dengan  menggunakan tembaga sebagai elektroda, membran Poli Eter Eter Keton Tersulfonasi (SPEEK) sebagai media penukar kation, dan menggunakan mediasubstrat limbah. MFC diamati selama 80 jam. Pengukuran tegangan yang dihasilkan dilakukan setiap 4 jam.Tegangan maksimum yang dihasilkan pada media limbah tahu mencapai 80 mV (pada jam ke-28). Selama 52jam berikutnya, tegangan sedikit menurun. Sedangkan pada air limbah cucian beras, tegangan maksimum terjadipada jam ke-60 yaitu 234 mV. Selama proses 80 jam, melalui sistem MFC pada media limbah tahu, CODmampu turun 49,33% dari 6750 mg/L menjadi 3420 mg/L. Sedangkan pada limbah cucian beras, COD turundari 18840 mg/L menjadi 10560 mg/L atau sebesar 43,95 % selama 80 jam.Kata Kunci: Microbial Fuel Cell, listrik, limbah pangan.
Co-Authors Agusta S. Putra Dani Permana Hari R. Haryadi Hartati, Etih Herlian E. Putra Lina Hasyyati Mindriany Syafila Muhammad Hazqil Kadzim Rintan Fransiska Trimudita