Judul: Phytoremediation of Greywater Liquid Waste, Chicken Slaughterhouses, and Tofu Factories Using Water Scape (Ipomoea Aquatica Forsk)
Abstrak: Kegiatan masyarakat sehari-hari, pembuangan air limbah industri, dan rumah tangga merupakan faktor-faktor penyebab terjadinya pencemaran lingkungan. Tujuan penelitian ini adalah membandingkan tingkat pertumbuhan tanaman kangkung air (Ipomoea aquatica Forsk) menggunakan limbah cair greywater (domestik), rumah pemotongan ayam, dan pabrik tahu. Proses penanaman tumbuhan secara hidroponik, pengujian kualitas air, dan pengambilan sampel dilakukan di Laboratorium Seameo Biotrop, Kecamatan Bogor Selatan, Kota Bogor dari Desember 2022 hingga Januari 2023. Analisis data berupa perhitungan nilai parameter kualitas air dan perhitungan rata-rata pengukuran vegetatif. Hasil analisis data yaitu penurunan nilai kualitas air (BOD, COD, dan TSS) dan pertumbuhan vegetatif tanaman yang menunjukkan bahwa limbah cair rumah pemotongan ayam dan greywater lebih efisien tingkat pertumbuhannya dibandingkan limbah cair pabrik tahu. Selain itu, hasil perhitungan indeks pencemaran pada limbah cair greywater dan pabrik tahu mengalami penurunan yang signifikan dikarenakan kandungan organiknya sudah menurun akibat proses fitoremediasi dan pengenceran air dan rumah pemotongan ayam mengalami kenaikan sedikit dikarenakan memiliki kandungan amonia., Daily community activities, disposal of industrial and household wastewater are factors that cause environmental pollution. The purpose of this study was to compare the growth rates of water spinach plants (Ipomoea aquatica Forsk) using greywater (domestic) wastewater, chicken slaughterhouses, and tofu factories. The process of growing plants hydroponically, testing water quality, and taking samples was carried out at the Seameo Biotrop Laboratory, South Bogor District, Bogor City from December 2022 to January 2023. Data analysis in the form of calculating the value of water quality parameters and calculating the average vegetative measurements. The results of data analysis, namely the decrease in the value of water quality and plant growth which shows that the liquid waste of chicken slaughterhouses is more efficient in its growth rate compared to greywater wastewater and chicken slaughterhouses. In addition, the results of the calculation of the pollution index in greywater and tofu factory wastewater have decreased significantly because the organic content has decreased due to the phytoremediation process and water dilution and the chicken slaughterhouse has increased slightly due to the ammonia content.
Keyword: Liquid waste, phytoremediation, water quality, water spinach

Judul: Phytoremediasi Greywater dengan Tanaman Kayu Apu (Pistia stratiotes) dan Tanaman Kiambang (Salvinia molesta) serta Pemanfaatannya untuk Tanaman Selada
Abstrak: Waste are residue from certain efforts of human activities in solid, liquid or gas form and have less economical value. Liquid waste often dispose to sewage water so it could decrease water quality. Domestic waste known as prominant contaminant of water environments. Usage water for domestic requirement is much higher than industrial where organic contents in domestic waste is basicly “biodegradable”. Domestic wastewater is devided into blackwater and greywater. Blackwater is waste from toilets, faecal matter including industrial product, whereas greywater is none industrial wastewater generated from domestic processes such as bathing, dishing and kitchen washing. These research particularly focuse on greywater (bath waste) because it much easy to treat and recycle than blackwater, due to lower levels of contaminant. The aim of the research were to find out the most effective treatment using phytoremediation approach with Pistia and Salvinia and to study the influence of treatment on lettuce growth. The research consists of initial the research and main research. The initial research begin with determined waste concentration and biomass water plant used, while main managed greywater with circulation system using remediation vessel and water plant as phytoremediator. These research were designed according to Complete Randomized Factorial Experimental Design (SK = 95%) with two factors including remediation vessel (B1 and B2) and water plant (Control, Pistia and Salvinia), which every treatment were repeated for three times. The research result showed chemical characteristic that is Chemical Oxygen Demand (COD) were exceed standard quality of level waste. COD level significantly decrease (P<0,05) at 0 and 1 weeks after planting tend (WAP) by water plant treatment, while COD level at 3 WAP significantly decrease by remediation vessel. Phosphorus level significantly decrease at 0, 2 and 3 WAP by remediation vessel, while nitrate level significantly decrease at 1 WAP by water plant treatment, remediation vessel and both of combination. Pistia treatment more effective than Salvinia to recycling water quality. Phosphorous and nitrate level content in effluent 1 were low than nutrient requirement for normal lettuce growth on hydroponic system. Deficiency element nutrient for lettuce make it low weight of harvested and has caused died level of lettuce at the research were approximately 32%.
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Judul: Konstruksi Hukum Grup Kurva Eliptik Atas F3m
Abstrak: Elliptic curves upon F3m can be divided in two cases, i.e. supersingular and nonsupersingular case. Based on group laws on elliptic curves, a new arithmetic upon F3m can be formulated as an addition process of two random points on the curve. This addition process can then be applied to the ElGamal algorithm.
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