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All Journal Jurnal Teknik Kimia USU Jurnal Teknik Kimia USU Jurnal Ilmiah Mahasiswa Fakultas Tarbiyah dan Keguruan UIN Ar-Raniry
Azka, Nawalul
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Pengaruh Laju Pengadukan Terhadap Stabilitas Digester Anaerobik Satu Tahap pada Pembentukan Biogas dari Limbah Cair Pabrik Kelapa Sawit Menggunakan Lab Scale Reaktor Batch Irvan; Trisakti, Bambang; Azka, Nawalul
Jurnal Teknik Kimia USU Vol. 9 No. 1 (2020): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v9i1.3294

Abstract

Mixing is essential to increase the efficiency of interactions between active microbes and organic matter during the anaerobic digestion process. The purpose of this research is to study the effect of mixing rate on the stability of one stage anaerobic digesters in biogas production in terms of pH and alkalinity. The production of biogas from palm oil mill effluent was carried out in a 6000 ml batch reactor at varying mixing rates: 100 rpm, 150 rpm, 200 rpm, 250 rpm, and 300 rpm. The reactor is operated with a mixture condition maintained at a pH of 7 ± 0.2 and an operating temperature of 55 ° C. NaHCO3 is added to the mixture to control and maintain the pH of the mixture. Analysis of pH and alkalinity is carried out every day to see the reactor stability. The best results were obtained at a mixing rate of 200 rpm with the pH produced stable during the process is 7. The alkalinity profile produced at each mixing rate was relatively stable with an alkalinity range is 3500-4500 mg/L. The best mixing rate is 200 rpm with a stable pH and alkalinity and the highest biogas production is 457 ml/day.
Penerapan Konseling Kelompok Untuk Mengurangi Kecanduan Game Online Pada Siswa Azka, Nawalul; Muslima; Arliani, Desi
JURNAL ILMIAH MAHASISWA Vol. 2 No. 1 (2024): Jurnal Ilmiah Mahasiswa Fakultas Tarbiyah dan Keguruan UIN Ar-Raniry
Publisher : Fakultas Tarbiyah dan Keguruan Universitas Islam Negeri Ar-Raniry Banda Aceh

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Abstract

Online game addiction is a form of addiction caused by internet technology which makes a person very attached to playing online games, from time to time there will be an increase in frequency and duration. Online games are games that are very popular and popular among teenagers, including students. Online games have a bad influence on students if they are played for an excessive amount of time so that addiction to online games causes students to reduce their study time. The aim of this research is to determine the reduction of online game addiction through group counseling services for students. The method in this research uses a quantitative approach with a One Group Pretest and Posttest design. The research sample consisted of 5 students based on the recommendation of the guidance and counseling teacher using purposive sampling technique. The data collection technique uses a questionnaire to measure students' level of online game addiction. The research results showed that there was a significant reduction after providing treatment through group counseling in the level of online game addiction with a calculated t value of 20,250 which was greater than the t table of 2,131 (20,250>2,131). This means that the alternative hypothesis (Ha) is accepted and the null hypothesis (Ho) is rejected. It can be concluded that research shows that the application of group counseling can reduce online game addiction in students
Pengaruh Laju Pengadukan Terhadap Stabilitas Digester Anaerobik Satu Tahap pada Pembentukan Biogas dari Limbah Cair Pabrik Kelapa Sawit Menggunakan Lab Scale Reaktor Batch Irvan; Trisakti, Bambang; Azka, Nawalul
Jurnal Teknik Kimia USU Vol. 9 No. 1 (2020): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.134 KB) | DOI: 10.32734/jtk.v9i1.3294

Abstract

Mixing is essential to increase the efficiency of interactions between active microbes and organic matter during the anaerobic digestion process. The purpose of this research is to study the effect of mixing rate on the stability of one stage anaerobic digesters in biogas production in terms of pH and alkalinity. The production of biogas from palm oil mill effluent was carried out in a 6000 ml batch reactor at varying mixing rates: 100 rpm, 150 rpm, 200 rpm, 250 rpm, and 300 rpm. The reactor is operated with a mixture condition maintained at a pH of 7 ± 0.2 and an operating temperature of 55 ° C. NaHCO3 is added to the mixture to control and maintain the pH of the mixture. Analysis of pH and alkalinity is carried out every day to see the reactor stability. The best results were obtained at a mixing rate of 200 rpm with the pH produced stable during the process is 7. The alkalinity profile produced at each mixing rate was relatively stable with an alkalinity range is 3500-4500 mg/L. The best mixing rate is 200 rpm with a stable pH and alkalinity and the highest biogas production is 457 ml/day.
Co-Authors Arliani, Desi Bambang Trisakti Irvan Muslima