Judul: Pengolahan Limbah Organik Laboratorium Proling MSP Menggunakan Bakteri Komersil StarTmik Beyonic LIPI
Abstrak: Limbah laboratorium dihasilkan dari sisa air contoh yang tidak terpakai, sisa pelarut, produk terbuang, air atau cairan bekas pencucian dan pembilasan peralatan, serta sisa kegiatan analisis. Melalui proses bioremediasi bakteri mampu menguraikan limbah organik dengan mengubah bahan organik pencemar sebagai nutrisi dan dalam bentuk senyawa yang lebih sederhana. Tujuan penelitian ini adalah menentukan perlakuan terbaik penggunaan bakteri dalam mereduksi kandungan bahan organik limbah Laboratorium Proling. Penelitian ini dilakukan selama sembilan hari dan diamati setiap tiga hari, yaitu pada hari ke-0, 3, 6 dan 9. Parameter COD dan kelimpahan bakteri merupakan fokus utama pada penelitian ini. Penambahan molase menjadi salah satu penyebab terjadi peningkatan nilai COD, kelimpahan bakteri, kekeruhan, dan warna selama pengamatan. Hasil penelitian menunjukkan persen perubahan nilai COD tertinggi terjadi dihari ke-3 dengan perlakuan LM dan LBM sebesar 98% dan 89%. Perlakuan limbah bakteri dan molase (LBM) menunjukkan kinerja bakteri yang lebih baik daripada perlakuan lainnya dalam mereduksi bahan organik limbah Laboratorium Proling dalam waktu tiga hari.
Keyword: bahan organik, bakteri, bioremediasi, limbah laboratotium, molase

Judul: Aplikasi Bakteri dalam Bioremediasi Kandungan Bahan Organik Limbah Laboratorium Proling MSP IPB
Abstrak: Limbah yang berasal dari aktivitas pencucian alat-alat di laboratorium memiliki kandungan bahan organik. Bakteri bioremediator air limbah dapat tumbuh dengan memanfaatkan bahan organik sebagai sumber karbon untuk meningkatkan biomassanya. Penelitian ini bertujuan untuk mendeskripsikan pengaruh aplikasi penggunaan bakteri probiotik komersial dalam mereduksi bahan organik limbah Laboratorium Proling MSP IPB. Penelitian eksperimental dilaksanakan di Laboratorium Mikrobiologi Perairan pada bulan Februari hingga Juli 2016. Penelitian ini terdiri dari beberapa perlakuan, yaitu limbah cair (L), limbah cair+molase (LM), dan limbah cair+molase+bakteri probiotik komersial (LMB). Parameter utama yang diamati adalah COD dan kelimpahan bakteri. Hasil penelitian menunjukkan bahwa terjadi perbedaan hasil yang signifikan antara perlakuan dengan penambahan molase dan tanpa molase. Berdasarkan nilai COD, penurunan bahan organik tertinggi terjadi pada perlakuan LM dan LMB dengan waktu efektif 3 hari. Perlakuan tersebut menurunkan konsentrasi COD sebesar 97% dan 91%. Di samping itu, kelimpahan bakteri pada perlakuan yang menggunakan molase juga lebih tinggi dibandingkan dengan perlakuan tanpa menggunakan molase. Berdasarkan hasil penelitian, perlakuan limbah molase dan bakteri (LMB) menunjukkan kinerja bakteri yang lebih baik daripada perlakuan lainnya dalam mereduksi bahan organik limbah Laboratorium Proling, dalam waktu tiga hari.
Keyword: air limbah organik laboratorium, bahan organik, bakteri, molase

Judul: Characteristic of Overshooting Top (OT) Based on  Himawari  8  Satellite  as  a  Convective  Cloud  Feature  that  Generates  Extreme Weather in the Java Island Region
Abstrak: Overshooting Top (OT) is a feature at the top of a convective cloud that is associated with extreme weather. Research on OT in tropical Indonesia is still very limited. The existence of geostationary satellites with wide area coverage and fast frequency observations is useful for observing the fast dynamics of the OT life cycle. Therefore, this study intends to analyze the relationship between OT and extreme weather, updraft and thermodynamic conditions of OT when extreme weather occurs, the best objective method for detecting OT in the day time and night time, and the spatiotemporal distribution of OT in the tropical region of Java Island during the 2018-2021 period. Based on visual analysis using visible channel and Himawari 8 sandwich products, 87% of extreme weather events in Java were accompanied by the appearance of OT. It indicates that the presence of the OT pattern is a convection cloud pattern or feature that is closely related to extreme weather events for the Java Island region. The existence of a time lag between the appearance of OT and extreme weather events on Java Island indicates that the OT of convection cloud can be used as a precursor or nowcasting for the appearance of extreme weather. Most of the convective cloud OT features during extreme weather events on Java Island have altitude that were only able to exceed the altitude of the equilibrium level and few were able to exceed the tropopause level of 9 km – 16 km. The difference in atmospheric conditions during extreme weather events on Java Island, which is in the tropics and subtropics, is a strong and unstable convective energy condition characterized by a larger CAPE, as well as unstable KI, LI, SI and TTI values. It is offset by kinematic factors in the form of a weak vertical wind shear (bulk wind shear 0-6 km) and a higher freezing point height. The difference between extreme weather events in the Java Island region and other tropical regions compared to subtropical regions is the strong updraft speed of convection clouds. The IRW Texture COMB algorithm based on the IRW-Texture Gradient modification and the COMB algorithm shows a significant increase in quality for detecting OT and non-OT pixels in Java. Rainy days with rainfall > 50 mm/day are very common in areas with an altitude of > 500 m. On the other hand, the level of convection activity which is indicated by the presence of OT and lightning is significantly reduced in this area. OT of convective clouds appear more frequently during the DJF season and less frequently during the JJA season. OT often appears during the day time and rarely at night time. Most OTs appear in the central part, away from the south and north coasts of Java Island during the day, while OTs that appear near the south and north coasts of Java Island can appear in the morning or afternoon.
Keyword: convective clouds, extreme weather, Overshooting Tops, Himawari 8 Satellite