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All Journal Waste Technology Jurnal Penelitian dan Pembelajaran IPA
Murni, Dewi
Jurusan Pendidikan Biologi, Fakultas Keguruan Dan Ilmu Pendidikan, Universitas Sultan Ageng Tirtayasa, Jl. Raya Jakarta, KM 4, Serang, Banten
Computer Science & IT Education Other

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Study of Biogas Production Rate from Water Hyacinth by Hydrothermal Pretreatment with Buffalo Dung as a Starter Teguh Kurniawan; Yuhelsa Putra; Dewi Murni
Waste Technology Vol 2, No 2 (2014)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (868.484 KB) | DOI: 10.14710/2.2.26-30

Abstract

In this paper we report the effects of hydrothermal pretreatment on biogas enhancement production rates from water hyacinth mixed with buffalo dung. The focus of the experiment was on the time of hydrothermal pretreatment and the ratio of water hyacinth with buffalo dung. The hydrothermal pretreated substrates were characterized by TDS, BOD and pH. The hydrothermal pretreatment of 60 minutes with the ratio of water hyacinth to buffalo dung 1:2 showed the highest biogas production rate at 7889 ml/day. However, the highest methane composition was 52.82% which resulted on the hydrothermal treatment of 30 minutes with equal ratio of water hyacinth and buffalo dung. Thus, the optimum of methane yield obtained at hydrothermal pretreatment for 30 minutes with equal ratio of water hyacinth to buffalo dung is 2856 ml/day. The hydrothermal pretreatment increases the rate production of biogas 102% and the methane yield 51% relative to untreated water hyacinth. The ratio of water hyacinth and buffalo dung has a great impact on biogas production rate and compositions for hydrothermal pretreated substrates.
PENINGKATAN KECAKAPAN KOMUNIKASI SISWA MENGGUNAKAN PEMBELAJARAN BILINGUAL PREVIEW REVIEW DENGAN SETTING JIGSAW PADA KONSEP PENGELOLAAN LINGKUNGAN Sari, Indah Juwita; Murni, Dewi; Sjaifuddin, Sjaifuddin
Jurnal Penelitian dan Pembelajaran IPA Vol 2, No 2 (2016): Available Online in Desember 2016 (Web of Science Indexed)
Publisher : Department of Science Education, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (531.139 KB) | DOI: 10.30870/jppi.v2i2.741

Abstract

Abstract This study aims to determine the increase students' communication skills using bilingual preview review with setting jigsaw learning in the class VII SMPN 1 Tangerang on the concept of environmental management. The method used in this research was quasi-experimental research with one group pretest posttestdesign. In this research, the sample was class VII I, there are 30 student participant by purposive sampling. The instruments used the observation paper and written communication ability test. The result of the research is t-test result get tcount= 11.41 and ttable at α = 0.05 is 1,69. tcount= 11,41 > ttable=1.69 which indicates that there is an increase students' communication skills using bilingual preview review with setting jigsaw learning in the class VII SMPN 1 Tangerang on the concept of environmental management. Keywords: Bilingual Preview Review Learning, Setting Jigsaw, Students’ Communication Ability Abstrak  Penelitian ini bertujuan untuk mengetahui peningkatan kecakapan komunikasi siswa menggunakan pembelajaran bilingual preview review dengan setting jigsawkelas VII SMPN 1 Tangerangpada konsep pengelolaan lingkungan. Metode yang digunakan dalam penelitian ini adalah metode kuasi eksperimen dengan desain penelitian one group pretest posttest. Sampel penelitian adalah kelas VII I berjumlah 30 siswa yang diambil secara purposive sampling. Instrumen yang digunakan berupa lembar observasi dan soal kecakapan komunikasi tulisan. Dari hasil penelitian diketahui bahwa hasil uji-t didapat thitung = 11,41 dan ttabel pada α = 0,05 adalah 1,69. thitung = 11,41 > ttabel = 1,69 yang menunjukan bahwa terdapat peningkatan kecakapan komunikasi siswa menggunakan pembelajaran bilingual preview review dengan setting jigsaw berpengaruh pada konsep pengelolaan lingkungan di SMPN 1 Tangerang. Kata kunci :  Pembelajaran Bilingual Preview Review, Setting Jigsaw, Kecakapan Komunikasi Siswa
Co-Authors Indah Juwita Sari Sjaifuddin, Sjaifuddin Teguh Kurniawan Yuhelsa Putra