Judul: Perancangan Sewage Treatment Plant (STP) sebagai  Implementasi Aspek Green Building pada Apartemen Samasta  Mahata Margonda Depok
Abstrak: Peningkatan pertumbuhan penduduk menyebabkan naiknya jumlah limbah cair domestik yang berasal dari kegiatan rumah tangga dan perkantoran. Konsep green building harus diterapkan terutama aspek konservasi air agar penggunaan air dapat berjalan dengan optimal. Salah satu upaya untuk mengolah air limbah domestik di Apartemen Samasta Mahata Margonda adalah penggunaan Sewage Treatment Plant (STP). Penelitian ini bertujuan merencanakan STP, melakukan identifikasi potensi penggunaan kembali air hasil pengolahan, serta melakukan penilaian green building kategori konservasi air. Konsentrasi akhir dari parameter air limbah BOD, COD, TSS, dan ammonia setelah melewati unit pengolahan sebesar 0,54 mg/L, 2,52 mg/L, 10,72 mg/L, dan 4,79 mg/L sehingga sudah memenuhi baku mutu standar aliran kelas 2 untuk penggunaan kembali air daur ulang. Penghematan air yang dapat dicapai untuk siram tanaman dan siram toilet adalah 56% atau 156,5 m3/hari dari total kebutuhan air bersih 276 m3/hari., Population growth due to urbanization has resulted in an increase in the amount of domestic liquid waste originating from household and office activities. The concept of green building must be applied, especially aspects of water conservation so that water utilization can run optimally. One of the efforts to treat domestic wastewater at the Samasta Mahata Margonda Apartment is to use a Sewage Treatment Plant (STP). This study aims to plan a STP, to identify the potential for reuse of treated water, and to conduct a green building assessment in the category of water conservation. The final concentrations of wastewater parameters BOD, COD, TSS, and Ammonia after passing through the treatment unit were 0,54 mg/L, 2,52 mg/L, 10,72 mg/L, and 4,79 mg/L so that they still meet the requirements quality standard for class 2 stream for reuse of recycled water. Water savings that can be achieved for watering plants and flushing toilets are 56% or 156,5 m3/day of the total clean water requirement of 276 m3/day.
Keyword: Greenship, konservasi air, limbah cair domestik, sewage treatment plant

Judul: The Design of Simple Water Reclaim System for Domestic Wastewater (Greywater)
Abstrak: Pertumbuhan populasi, perkembangan industri dan agrikultur, urbanisasi serta faktor kontaminasi dan kekeringan sumber, menjadi tantangan dalam pemenuhan kebutuhan air. Indonesia adalah negara kaya akan sumber air namun seiring dengan perkembangan pembangunan dan perubahan iklim, beberapa kota besar dilaporkan sedang mengalami krisis air dan penurunan kualitas air tanah. Cara kontruktif yang dapat dilakukan masyarakat dalam mendukung perbaikan kualitas sumber air salah satunya adalah usaha mengurangi dan mendaur ulang air limbah. Laporan statistik lingkungan hidup Indonesia tahun 2020 menyatakan lebih dari separuh limbah rumah tangga yang berasal dari mandi, mencuci, kegiatan dapur dialirkan ke selokan atau sungai. Perancangan sistem daur ulang air limbah rumah tangga (greywater) untuk penggunaan kembali dalam ruang lingkup pencucian kendaraan menggunakan tiga tahap secara berurutan yaitu koagulasi menggunakan koagulan alum, filtrasi dengan menggunakan metode multi media filter, dan disinfeksi menggunakan lampu ultraviolet. Pengujian paramer pH, oksigen terlarut, padatan terlarut, padatan tersuspensi dan kadar surfaktan akan dilakukan untuk menentukan kualitas air dengan standar baku yang sesuai dengan tujuan aplikasi air daur ulang. Kata kunci: air, daur ulang air, air limbah, greywater, filtrasi, koagulasi, disinfeksi, ultraviolet., Population growth, industrial and agricultural development, urbanization, and factors of contamination and sources' dryness are challenges in meeting water needs. Indonesia is a country with a lot of water resources. However, in population growth and climate change, several big cities are reportedly experiencing a water crisis and decreasing groundwater quality. One of the constructive ways that the community can support improving the quality of water sources is to reduce and recycle wastewater. The 2020 Indonesian Environmental Statistics report that more than half of household waste from bathing, washing, and kitchen activities goes into sewers, ditches, or rivers. The design of a household wastewater (greywater) reclaim system for application in the scope of vehicle washing uses three sequential stages: coagulation using alum coagulant, filtration using the multi-media filter method, and disinfection using an ultraviolet lamp. Tests for parameters of pH, dissolved oxygen, dissolved solids, suspended solids, and surfactant levels will be carried out to determine the quality of water with standards that are suitable for reclaimed water applications. Keywords: water, water reclaim, wastewater, greywater, filtration, coagulation, disinfection, ultraviolet.
Keyword: water, water reclaim, wastewater, greywater, filtration, coagulation, disinfection, ultraviolet

Judul: Mitochondrial DNA Gene Organization and Phylogenetic Relationship of Naja siamensis
Abstrak: Naja siamensis is one of Asiatic cobra in the Family of Elapidae, known as a cryptic snake. It has many morphological variations that lead to misidentification. Misidentification can cause the wrong concept in developing antivenom types due to high snakebite cases occur in Thailand. Thus, an accurate species identification using a molecular approach is crucially required. Mitochondrial DNA has been used widely in snake molecular studies. These studies were aimed to determine the arrangement of the N. siamensis partial mitochondrial genes using reptile-oriented primers and to reveal the phylogenetic relationship among other species of Asian cobra. DNA extraction was carried out based on the standard DNA salting-out protocol and was conducted by bioinformatics analysis using BLASTn and MEGA 6 software. Gene annotation was performed against N. kaouthia complete genome. A total of 3121 bp of N. siamensis mtDNA genes were sequenced consisting of partial of six regions: 16S rRNA, ND1, tRNA-Ile, CRII region, tRNA-Leu, tRNA-Gln, and COI genes. The mtDNA gene organization of N. siamensis was predicted to has a similar pattern with the common Elapidae mtDNA gene organization. This study showed that there is a monophyletic form in Naja genus and N. kaouthia is the closest species with N. siamensis based on partial 16S rRNA and ND1 gene.
Keyword: 16S rRNA, Elapidae, ND1, phylogenetic relationship