Pengolahan Air Berkualitas Rendah Menjadi Air Domestik Non Konsumsi (Studi Kasus : Air Sungai Way Belau Kuripan - Bandar Lampung)

Air merupakan sumber daya alam yang diperlukan untuk hajat hidup orang banyak, bahkan olehsemua makhluk hidup. Oleh karena itu, sumber daya air harus dilindungi agar tetap dapatdimanfaatkan dengan baik oleh manusia serta makhluk hidup yang lain. Tujuan penelitian iniantara lain: mengetahui karakteristik kualitas air sungai Way Belau Kuripan berdasarkanparameter yang diuji, merakit instalasi pengolahan air sungai berkualitas rendah menjadi airdomestik non konsumsi, menganalisis kinerja dan keefektivan dari instalasi pengolahan air sungaitersebut.Dalam penelitian uji perlakuan ini menggunakan dua dosis koagulan yang berbeda. Air sungai dariSungai Way Belau Kuripan Bandar Lampung dicampur dengan kedua dosis koagulan tersebut.Dalam pelaksanaannya terdapat tiga sampel, yaitu sampel awal sebelum perlakuan, sampel hasilperlakuan pertama, dan sampel perlakuan kedua. Ketiga sampel diuji di laboratorium UPTD BalaiLaboratorium Kesehatan Provinsi Lampung untuk mengetahui parameter COD, pH, TSS, AmoniaNitrogen, DO dan BOD. Pada model instalasi, air sungai yang telah dicampur dengan tawas, batukapur dan kaporit kemudian diaduk menggunakan mixer lalu sampel diendapkan selama 24 jamkemudian disaring dengan filter karbon aktif dan serat nilon.Hasil pengujian sampel hasil perlakuan model instalasi menunjukkan hasil yang baik, terutamapada parameter COD, TSS, Amonia Nitrogen, dan DO. Hasil pengujian sampel menunjukkankadar tawas efektif yaitu 0,50 gram/liter ditambah 0,1 gram/liter batu kapur dan 0,05 gram/literkaporit. Kadar tersebut dapat menurunkan kadar COD,pH, TSS, Amonia Nitrogen, dan BOD sertamenaikkan kadar DO masing-masing mencapai 64,59%, 23,09%, 53,29%, 51,95%, 66,79 dan543,94%. Hasil penelitian ini telah mampu merubah air sungai Way Belau Kuripan yangberkualitas rendah menjadi air yang berkualitas lebih baik

Study System Drainase Di Fakultas Teknik Universitas Lampung

Penelitian ini dilakukan untuk mengetahui bagaimana sistem drainase yang ada apakah sudah optimal dan bagaimana pula kapasitas saluran yang ada apakah masih memadai atau tidak .Pada pelaksnaannya dilakukan analisis hidrologi dan hidrolika. Analisis hidrologi menggunakan data curah hujan maksimum setelah itu dilakukan pengukuran dispersi melalui perhitungan parameter statistik. Dilanjutkan dengan pemilihan jenis distribusi untuk mendapatkan cara mengolah data pengukuran curah hujan rencana dan perhitungan intensitas hujan. Analissis hidrolika berupa kapasitas debit drainase eksisting, setelah itu di buat sistem dan dimensi yang sesuai.Hasil penelitian berdasarkan pengukuran dispersi diperoleh distribusi yang cocok adalah Distribusi Log Pearson III dan diperoleh nilai curah hujan rencana untuk kala ulang 2 tahun sebesar 101,7983739 mm Koefisien pengaliran pada DAS diperoleh sebesar 0,8961 dengan luas DAS 501,32 m2. Nilai debit hujan untuk kala ulang 2 tahun dengan metode rasional diperoleh nilai 2,1172 m3/detik Nilai Qhujan adalah 2,1172 m3/detik sedangkan nilai Qteoritis adalah 0,0833 m3/detik. Karena Qhujan lebih besar daripada Qteoritis, dapat disimpulkan bahwa saluran drainase eksisting sudah tidak cukup lagi untuk menampung debit banjir yang ada

Perkembangan Oosit Induk Osteochilus Hasselti C.v. yang Diberi Hormon Estradiol-17β dan Pakan dengan Kadar Protein Berbeda

The availability of fish seed is very important in fish propagation. Good quality of fish seeds were produced by a good brooder which characterized a large number of egg production at spawning. The aims of this research were to evaluate the oocytes development in the hard-lipped Barb (Osteochilus hasselti C.V.) given 17β-estradiol, different percentage of protein in the diet, and their combination. This research was conducted experimentally applying Factorial Completely Randomized Design. The first factor was percentage of protein in the diet consisted of 4 levels namely 25% (P1), 30% (P2), 35% (P3), and 40% (P4), the second factor was dose of 17β-estradiol benzoate (EB) consisted of 3 levels namely 0 µg/kg of body weight (D0), 126 µg/kg of body weight (D1), and 210 µg/kg of body weight (D2), thus there were 12 combinations of treatment with 3 replicates. The results showed that neither of protein proportion or 17β-estradiol affected the proportion of oocytes of any developmental stage (p>0,05) within the first two weeks post spawning. The treatments, however, significantly increased the proportion of oocytes at V3-V5, V6-V7, and post-vitellogenic stages (p 0.05). In conclusion, the percentage of protein in the diet and different doses of 17β-estradiol improved oocyte development of Hard-Lipped Barb (Osteochilus hasselti C.V.)

Desain Penampang Sungai Way Besai Melalui Peningkatan Kapasitas Sungai Menggunakan Softwere HEC-RAS

Way Besai river is located in Sumberjaya subdistrict, West Lampung district, Lampung. It is one of the sub river from Tulang Bawang river. Way Besai river has been used as a the electric power source, known as Besai hydropower. Besai Hydropower has decreased energy supply of 40 MW from the supply optimum can reachs 90 MW. his is due to the catcment area conditions of the Way Besai rivers are "metastable" so which effected in the shallowing of the cross-section quickly. So it needs the capacity increased of the cross-section of the river until the early condition where is the supply can reachs 90 MW.For the first step in improving the capacity of the Way Besai river needed hydraulics river simulation process that facilitated by using Hydrologic Engineering Center-River Analysis System (HEC-RAS) Program. HEC-RAS program can help to modeling the flow of cross-section of the river on the existing condition and normalization using the steady flow options and data input including maximum discharge data. The output of modeling using HEC-RAS program can be seen in the form of pictures and a table that presents the characteristics of a cross-section of the river.From the result of the analysis founded that to reach the normalization condition, needs the dredging until the elevation +713,00 level, with 2.435.590,09 m3 of volume capacity of dredging. When the water level of the river reachs Full Supply Level (FSL) elevation that is on elevation +722,00 level founded that the maximum discharge in the downstream in the amount of 57,19 m3/s, with water volume capacity in the 1.471.185,77 m3. For the Reservoir Surface Area in Way Besai river has increased with 28,6% from the exsisting condition that recorded from Sta 0+000 level until sta 3+391,45 leve

A Magnetic Drug Delivery Capsule Based on a Coil Actuation Mechanism

Current Wireless Capsule Endoscopic systems (WCE) provide only diagnostic tools, but in the future, advanced functionalities such as controllable drug delivery could be available for clinicians. This work introduces a Magnetic Drug Delivery Capsule (MDDC). The MDCC is based on a coil actuation mechanism that enables the deployment of a drug chamber from the device body. In this work, we present the prototype design and the results of bench trials that demonstrated the device ability to trigger the drug deployment by characterizing the magnetic field and resulting force

AlN overgrowth of nano-pillar-patterned sapphire with different offcut angle by metalorganic vapor phase epitaxy

We present overgrowth of nano-patterned sapphire with different offcut angles by metalorganic vapor phase epitaxy. Hexagonal arrays of nano-pillars were prepared via Displacement Talbot Lithography and dry-etching. 6.6 µm crack-free and fully coalesced AlN was grown on such substrates. Extended defect analysis comparing X-ray diffraction, electron channeling contrast imaging and selective defect etching revealed a threading dislocation density of about 109 cm-2. However, for c-plane sapphire offcut of 0.2° towards m direction the AlN surface shows step bunches with a height of 10 nm. The detrimental impact of these step bunches on subsequently grown AlGaN multi-quantum-wells is investigated by cathodoluminescence and transmission electron microscopy. By reducing the sapphire offcut to 0.1° the formation of step bunches is successfully suppressed. On top of such a sample an AlGaN-based UVC LED heterostructure is realized emitting at 265 nm and showing an emission power of 0.81 mW at 20 mA (corresponds to an external quantum efficiency of 0.86 %)

The Composite Task Reveals Stronger Holistic Processing in Children than Adults for Child Faces

Background: While own-age faces have been reported to be better recognized than other-age faces, the underlying cause of this phenomenon remains unclear. One potential cause is holistic face processing, a special kind of perceptual and cognitive processing reserved for perceiving upright faces. Previous studies have indeed found that adults show stronger holistic processing when looking at adult faces compared to child faces, but whether a similar own-age bias exists in children remains to be shown. Methodology/Principal Findings: Here we used the composite face task – a standard test of holistic face processing – to investigate if, for child faces, holistic processing is stronger for children than adults. Results showed child participants (8–13 years) had a larger composite effect than adult participants (22–65 years). Conclusions/Significance: Our finding suggests that differences in strength of holistic processing may underlie the ownage bias on recognition memory. We discuss the origin of own-age biases in terms of relative experience, face-space tuning, and social categorization

On the Portability of Generalized Schnorr Proofs

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