1,720,958 research outputs found
PENGOLAHAN LIMBAH CAIR SEPTIC TANK (SEPTAGE) MENGGUNAKAN CONTRUCTED WETLANDS
No full textTypically, septic tank liquid waste is treated conventionally at Wastewater Treatment Plants (IPLT) using technologies that involve high operational and maintenance costs as well as skilled operators. In this study, the constructed wetland method was applied to treat septic tank liquid waste using several plants, including Scirpus lacustris, Cyperus rotundus, and Cyperus papyrus. The research was conducted over 42 days at the Environmental Quality Laboratory of ITATS. The treatment process lasted 25 days, aiming to reduce the BOD, TSS, and E. coli parameters in the septic tank liquid waste. The highest average removal rates were observed in Reactor 1 using Scirpus lacustris with a contact time of 25 days, achieving 81.9% removal of BOD, 94.25% removal of TSS, and 68% removal of E. coli. For Cyperus rotundus, the removal rates were 52% for BOD, 89.5% for TSS, and 63% for E. coli. For Cyperus papyrus, the removal rates were 62.84% for BOD, 87% for TSS, and 63% for E. coli. The average removal rate of Scirpus lacustris was higher compared to the other two test plants. Thus, while Scirpus lacustris is effective in reducing BOD, TSS, and E. coli concentrations, it still does not meet the E. coli quality standards set by Permen LH No. 68 of 2016 on domestic wastewater quality
Ketertarikan Arthropoda Pada Blok Refugia (Cosmos caudatus, Helianthus annuus L., Zinnnia acceraso) Di Lahan Mangga Alpukat Di Desa Oro-Oro Ombo Kulon, Rembang, Pasuruan
Full text linkMangga merupakan tanaman potensial untuk dikembangkan karena disukai oleh hampir semua lapisan masyarakat dan memiliki pasar yang luas. Permasalahan utama dalam pengembangan mangga adalah adanya serangan organisme pengganggu tanaman (OPT). Konsep pengendalian hama dengan menanam refugia pada sekeliling lahan tanaman berkemampuan memikat banyak musuh alami karena berfungsi sebagai sumber pakan maupun tempat perhentian. Penelitian ini bertujuan untuk memberikan informasi tentang kertetarikan arthropoda pada blok refugia di Desa Oro-oro Ombo Kulon. Pola penanaman refugia (C. caudatus, H. annuus L., Z. acceraso) yaitu dengan pola kombinasi tanam pinggir petak lahan (hedge rows) dan pola tanam sistem bank serangga (insectary bank). Pengamatan dilakukan dengan metode scan sampling yaitu dengan mengamati serangga yang hinggap pada refugia dengan menghitung jumlah spesies dan individu serangga pengunjung. Pengumpulan dan pengamatan serangga pada tanaman refugia di area tanaman mangga alpukat dilakukan dengan cara pengamatan secara langsung, menggunakan jaring ayun (sweep net), menggunakan yellow sticky traps, dan menggunakan pitfall trap. Data dianalisis secara kuantitatif dengan menghitung indeks keanekaragaman (H) dan indeks kelimpahan relatif (IKR%). Pada penelitian ini ditemukan sebanyak 16963 individu, yang terdiri dari 104 spesies, 56 famili, dan 12 ordo serangga sebagai hama, predator, penyerbuk, parasit, dan pengurai
REDESAIN TEMPAT PENYIMPANAN SEMENTARA (TPS) LIMBAH OLI BEKAS DI PT.XIZ MOJOKERTO DITINJAU DARI ASPEK TEKNIS
Full text linkPT. XIZ merupakan perusahaan pengempul dan penyimpan sementara limbah oli bekas. Limbah oli bekas tersebut disimpan sebelum dijual kepihak ketiga. PT.XIZ belum memiliki bak penampung untuk menampung ceceran minyak oli bekas, hal ini dapat mengakibatkan terlepasnya minyak oli bekas ke lingkungan sehingga menimbulkan bahaya pencemaran lingkungan. Perlunya penelitian terhadap sistem pengumpulan dan penyimpanan minyak oli bekas di PT. XIZ. Peraturan yang dijadikan rujukan penelitianadalah Keputusan Bapedal No. 225/ BAPEDAL/ 08/ 1996 tentang “Tata Cara dan Persyaratan Penyimpanan dan Pengumpulan Minyak Pelumas Bekas” dan merancang bangunan TPS Limbah oli bekas sesuai peraturan pemerintah PP No 101 tahun 2014.. Penelitian ini di lakukan untuk mengetahui hasil redesain dari TPS limbah oli bekas di PT.XIZ. Penelitian ini menggunakan metode diskriptif kuantitatif. Perencanaan redesain TPS LB3 oli bekas PT.XIZ yang memiliki dimensi Gedung panjang 50 m lebar 50 m dan mampu menampung 22.387,5 liter oli bekas selama 3 bulan dengan fasilitas pendukung, seperti palet, allowance ruangan, Ventilasi, p3k, alarm, tong oli, penerangan gudang, Detektor, jalur forklift, APAR
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
PENURUNAN TSS, BOD, ESCHERICHIA COLI PADA LIMBAH TANGKI SEPTIK MENGGUNAKAN TANAMAN CYPERUS PAPYRUS PADA PENGOLAHAN CONSTRUCTED WETLAND
Full text linkLimbah hasil penyedotan tangki septik mengandung bahan organik yang tinggi. Pengolahan limbah tangki septik di Instalasi Pengolahan Lumpur Tinja (IPLT) umumnya menggunakan teknologi konvensional yang memerlukan keahlian dalam pengoperasiannya. Constructed wetland merupakan satu alternatif pengolahan limbah yang sederhana untuk mengolah limbah dengan konsentrasi bahan organik yang tinggi. Penelitian ini menggunakan constructed wetland untuk mengolah limbah hasil penyedotan tangki septik dengan tanaman Cyperus papyrus. Tujuan penelitian adalah untuk menganalisa penurunan BOD, TSS dan Eschericia coli dalam limbah hasil penyedotan tangki septik yang diolah menggunakan constructed wetland dengan tanaman Cyperus papyrus. Penelitian akan dilaksanakan selama 41 hari di Laboratorium Kualitas Lingkungan Teknik Lingkungan ITATS, masa aklimatisasi 16 hari dan masa pengolahan 25 hari. Hasil penelitian menunjukkan bahwa penurunan TSS, BOD, Eschericia coliform pada limbah tangki septik yang telah diolah menggunakan constructed wetland dengan tanaman Cyperus papyrus adalah 87%, 62,84% dan 63%. Konsentrasi TSS, BOD, Eschericia coliform yang dicapai pada penelitian ini masih belum memenuhi mutu yang di tetapkan oleh Peraturan Gubernur Jawa Timur Nomor 72 Tahun 2013 tentang Baku Mutu Air Limbah bagi Industri dan / atau Kegiatan Usaha Lainnya, dengan konsentrasi masing-masing adalah 28 mg/l, 258 mg/l dan 4600 mg/l.Kata kunci: limbah tangki septik, constructed wetlands, Cyperus papyru
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