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MODEL ALAT PENAWAR AIR TANAH TERINTRUSI AIR LAUT (AIR PAYAU) DENGAN PROSES ELEKTROKOAGULASI

Poli-Teknologi Vol 10, No 2 (2011)
Publisher : Politeknik Negeri Jakarta

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Abstract

Brackish water or fresh water that tastes a bit salty due to seawater mixed is a frequent problem faced by people living close to the beach area. Ground water areas near shore are often caused by sea water intrusion inland. In general, brackish water can not be used as drinking water, and less feasible to be used for much else. To be used as drinking water and appropriate for use in domestic use brackish water needs special treatment to reduce the levels of minerals in it, primarily to reduce levels of salt in it. For this purpose an equipment model has been made. This model works based on the electrocoagulation process. This electrocoagulation equipment model consists of a rectangular bathtub equipped with stirrer, and square shaped settling tanks. The sizes of electrocoagulation process tank are 20 cm length, 20 cm width and 40 cm high. Motor with capacity of 0.5 hp used to stirred, equipped with 4 pieces blades. While the sizes of settling tank are 20 cm long, 20 cm wide and 40 cm high. Performance testing of this model implemented by filling 4.5 liters of brackish water into the electrocoagulation tank and each test processed using electric current of 1 ampere, 3 amperes and 5 amperes. Observation time for each test is 40, 80, 120, 160, 200, 240, 280, 320, 360, 400, 440 and 480 minutes. Concentration measurement of magnesium and sodium for each test performed by AAS. The final results of testing showed that the use of 3 amperes electric currents is able to reduce levels of magnesium from 100,000 mg/ltr to 81 mg/ltr and reduce sodium levels from 9600 mg/ltr to 185 mg/ltr with 400 minutes operating time. Key words: Brackish Water, Minerals Content, Electrocoagulation Process, Minerals Reduction, Fresh Water ABSTRAK Air payau atau air tawar yang rasanya agak asin karena tercampur air laut merupakan masalah yang sering dihadapi oleh masyarakat yang tinggal didaerah dekat dengan pantai. Air tanah daerah dekat pantai sering bersifat payau disebabkan adanya interusi air laut ke daratan. Pada umumnya air payau tidak dapat digunakan sebagai ari minum, dan kurang layak digunakan untuk keperluan yang lain. Agar dapat digunakan sebagai air minum dan layak digunakan untuk keperluan rumah tangga sehari-hari air payau perlu perlakuan khusus yang tujuannya mengurangi kadar mineral didalamnya terutama mengurangi kadar garam. Untuk keperluan ini telah dibuat model alat yang bekerja berdasarkan proses elektrokoagulasi. Model alat terdiri atas bak proses elektrokoagulasi berbentuk persegi yang dilengkapi pengaduk dan bak pengendap berbentuk persegi. Ukuran bak proses elektrokoagulasi panjang 20 cm, lebar 20 cm dan tinggi 40 cm. Ukuran motor pengaduk adalah 0,5 hp yang dilengkapi 4 buah sudu. Sedangkan bak pengendap berukuran panjang 20 cm, lebar 20 cm dan tinggi 40 cm. Pengujian kinerja alat dilakukan dengan mengisi 4,5 liter air payau ke dalam bak proses elektrokoagulasi dan untuk setiap pengujian digunakan arus listrik 1 ampere, 3 ampere dan 5 ampere. Waktu pengamatan untuk masing-masing pengujian adalah 40,80,120,160,200,240,280,320,360,400,440 dan 480 menit. Pengukuran konsentrasi magnesium dan natrium untuk setiap pengujian dilakukan dengan AAS. Hasil akhir pengujian menunjukkan bahwa pada penggunaan arus listrik 3 amper mampu menurunkan kadar magnesium dari 100.000 mg/l menjadi 81 mg/l untuk dan kadar natrium dari 9.600 mg/l menjadi 185 mg/l dengan waktu operasi 400 menit. Kata kunci: Air Payau, Kandungan Mineral, Proses Elektrokoagulasi, Reduksi Mineral , Air Tawar

HUJAN ASAM DAN PERUBAHAN KADAR NITRAT DAN SULFAT DALAM AIR SUMUR DI WILAYAH INDUSTRI CIBINONG-CITEUREUP BOGOR.

Jurnal Teknologi Pengelolaan Limbah Vol 14, No 1 (2011): juni 2013
Publisher : BATAN

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Abstract

Hujan asam dan perubahan kadar nitrat dansulfat dalam air sumur di wilayah industri Cibinong-Citeureup Bogor. Wilayah industri Cibinong-Citeureup Bogor telah mengalami hujan asam. Salah satu dampak hujan asam adalah degradasikualitas air sumur. Sebanyak 75% penduduk di wilayah ini mengkonsumsi air sumur untuk minum.Telah dipelajari dampak hujan asam terhadap perubahan kadar nitrat (NO3-) dan sulfat (SO4=) dalam airsumur pada daerah hujan asam intensitas tinggi (pH<5,0). Monitoring keasaman air hujan, kadar NO3-dan SO4= air hujan maupun air sumur dilakukan pada 9 lokasi dari tahun 1999 sampai 2009. Keasamanair hujan diukur menggunakan pH meter elektronik, kadar NO3- ditentukan dengan metoda brucin sulfat,dan kadar SO4= ditentukan dengan metoda turbidimetri (BaSO4) menggunakan spektrofotometer UVVIS.Dalam daerah hujan asam intensitas tinggi ini keasaman air hujan terus meningkat. Kadar nitratdalam air hujan meningkat nyata (Fhit 1,61 > F tabel ; P 0,193 < 0,05) tetapi kadar sulfat menurunmeskipun tidak nyata (Fhit<Ftabel ; P 0,721). Meningkatnya kadar nitrat dalam air hujan menyebabkanpeningkatan kadar nitrat dalam air sumur ( r = 0,85) secara nyata (F hit 8,93 > F tabel; P 0,000< 0,05).Kata kunci: hujan asam, sulfat, nitrat, air sumur, IndustriABSTRACT

PENURUNAN KEKERUHAN AIR LIMBAH SECARA ELEKTROKOAGULASI BERTENAGA SEL SURYA

Poli-Teknologi Vol 11, No 2 (2012)
Publisher : Politeknik Negeri Jakarta

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Abstract

Kandungan polutan dalam air limbah yang tidak terkontrol dapat menyebabkan polusi lingkungan. Air limbah dengan kandungan polutan tinggi harus diturunkan sampai memenuhi ambang batas aman, sehingga tidak merusak lingkungan. Untuk menjamin kandungan polutan dalam air limbah memenuhi batas aman bagi lingkungan digunakan pendekatan Peraturan Menteri Kesehatan RI No 416/Menkes/Per/IX/1990. Dalam peraturan Menteri tersebut dinyatakan bahwa kandungan maksimum logam berat dan parameter lain dalam air limbah masing-masing adalah:1,0 mg/l untuk besi (Fe), 0,5 mg/l untuk mangan (Mn), 500 mg/l untuk kesadahan (CaCO3), 0,05 mg/l untuk arsen (As), 200 mg/l untuk natrium (Na) dan 0,5 mg/l untuk timbal (Pb), kekeruhan 25 NTU, 6,5 -9,0 untuk pH dan 10 mg/l untuk bahan organik. Jika kekeruhan melebihi dari ketentuan tersebut, maka air harus diolah sampai memenuhi peraturan Menteri Kesehatan RI. Salah satu proses pengolahan yang dilakukan dalam penelitian ini adalah menerapkan proses elektrokagulasi dengan pengaktif tenaga surya. Penelitian dilakukan dengan mengalirkan air limbah industri sebanyak 4,5 liter kedalam bak elektrokoagulasi yang dilengkapi dengan accumulator (45 Ah, 12 Volt) dengan pengaktif sel surya (50 Wp, 12 Volt). Proses elektrokoagulasi dijalankan menggunakan arus 0,05, 0,1 , 0,2 amper dan interval waktu pengamatan 20 menit untuk menurunkan kekeruhan. Analisis kekeruhan diakukan dengan turbidimetry. Hasil analisis pada air hasil pengolahan menunjukkan bahwa kekeruhan turun dari 44,1 NTU menjadi 23,1 NTU dengan waktu proses 60 menit pada penggunaan arus 0,1 amper. Kata kunci: Air Limbah, Kekeruhan, Sel Surya, Elektrokoagulasi, Penurunan Kekeruhan

PENGEMBANGAN MODEL ASSESSMENT for LEARNING (AfL) MELALUI PENILAIAN TEMAN SEJAWAT PADA PEMBELAJARAN MATEMATIKA PADA POKOK BAHASAN TRIGONOMETRI DITINJAU DARI GAYA BELAJAR SISWA SMA NEGERI KARANGPANDAN TAHUN PELAJARAN 2012/2013

Pembelajaran Matematika Vol 1, No 4 (2013): Pembelajaran Matematika
Publisher : Pembelajaran Matematika

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Abstract

ABSTRACT : The aims of this research were: (1)to determine whether the AfLwith peer assessment of trigonometry topics can be applied in Karangpandan Senior High School, (2) to know which is more effective of the application of the AfL with peer assessment in improving students’ achievement compare with direct instruction,(3) to know the influence of students’ learning styles toward mathematics learning achievement of students in the trigonometry subject, (4)to determine the effect of the application of the AfL with peer assessment in improving student achievement be compared with direct instruction in terms of students´ learning styles on trigonometry subject. The research was dividedi nto two phases, the first phase is the determination of the model development stage and the AfL with peer assessment are included in research and development. In this stage, be done data collection, prototype planning model,Focus Group Discussion (FGD) were implemented and manufacture of prototype model then be tested. Tests carried out by 4 learning cycles.The second phase was to test the effectiveness of a model that includes quasi-experimental research by design research 2×3. The population of this research was eleven grade students of Karang pandan Senior High School of the first semester of the academic year 2012/2013. Samples were divided into two groups,experimental and control groups. The data analysis technique of this research that being used inthis study was unbalanced two-way analysis of variance.Based on the result of the analysis, we can conclude that:(1) the model of the AfL with peer assessment can be applied in Karangpandan Senior High School State. During the implementation of theAfL with peer assessment, the students being involved in learning and assessment learning, so more enjoyable and mathematics achievementof students is also increasing (2)students taught using AfL with peer assessment have mathematics achievement better than students taught using direct instruction, (3) students with kinesthetics learning style have higher mathematics achievement thanstudents with visual and auditory, while students with a visual learning style have a better achievement than students with auditory learning style, (4)at all the kinds of learning styles, students with applied learning AfL with peer assessment have better mathematics achievement than students with direct learning.Keywords: Assessment, Assesment for Learning (AfL), Peer Assessment, Learning Styles

Hubungan antara Dukungan Keluarga Melalui Interaksi Sosial, Upaya Penyediaan Transportasi, Finansial, dan Dukungan dalam Menyiapkan Makanan Makanan dengan Respon Kehilangan pada Lansia di Desa Pekaja, Kalibagor Kabupaten Banyumas

Jurnal Keperawatan Soedirman (JKS) Vol 2, No 1 (2007)
Publisher : Jurusan Keperawatan FKIK Unsoed

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Abstract

This study was descriptive corelational with cross-sectional design that aims to examine the relationship between family support and the older people loss response at Pekaja village kalibagor Public Health Center. The population were 150 older people whose ≥ 60 years old and lived at Pekaja village, Kalibagor Public Health Center. The sample size were 150 older people, lived with thir family, healthy and ready to be respondent, and the number for each ranking are determined by using population total sampling. Chi-square was used to examine the relationship between family support and the older people loss response. The result of the study showed that the older people with adaptif loss responses were 80 peoples (53,3%), more than the older people with unadaptif loss respones 70 (46,7%). From correlational analysis with p=0,05 there were the significant relationship between the family support and loss respone of the older people, the were significantly correlated interaction social support (p = 0,039), transportation aids support (p = 0,019), financial support (p = 0,04) and family support for preparing of some food (p = 0,17). The kind of family support that there were more dominant relationship with loss respone were interaction social support. The study concluded that family support needed the older people to adapt changing from effect aging process, especially interaction social family support was needed

MENGGAGAS SUATU KAWASAN INDUSTRI

GEMA TEKNOLOGI Vol 16, No 4 (2012): Periode Oktober 2011 - April 2012
Publisher : GEMA TEKNOLOGI

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Abstract

Sutanto, in this paper explain that industrial area is the area where the concentration of industrial activities whose existence the ideal should be integrated with other areas such as residential, office, education, economic activity and other agricultural green belt - the other. This industrial area should be equipped with infrastructure and other support facilities so as to serve the upstream to downstream processes. The necessary infrastructure and facilities such as office managers, environmental facilities, the network - a network of roads, electricity, telecommunications, sewage, water, fire and reforestation. For industrial buildings must meet the requirements of building height, building area coefficient referring to the City Master Plan. Keywords: city master plan

PENGEMBANGAN MODEL ASSESSMENT for LEARNING (AfL) MELALUI PENILAIAN TEMAN SEJAWAT PADA PEMBELAJARAN MATEMATIKA PADA POKOK BAHASAN TRIGONOMETRI DITINJAU DARI GAYA BELAJAR SISWA SMA NEGERI KARANGPANDAN TAHUN PELAJARAN 2012/2013

Jurnal Pembelajaran Matematika Vol 1, No 4 (2013): Pembelajaran Matematika
Publisher : Jurnal Pembelajaran Matematika

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Abstract

ABSTRACT : The aims of this research were: (1)to determine whether the AfLwith peer assessment of trigonometry topics can be applied in Karangpandan Senior High School, (2) to know which is more effective of the application of the AfL with peer assessment in improving students’ achievement compare with direct instruction,(3) to know the influence of students’ learning styles toward mathematics learning achievement of students in the trigonometry subject, (4)to determine the effect of the application of the AfL with peer assessment in improving student achievement be compared with direct instruction in terms of students learning styles on trigonometry subject. The research was dividedi nto two phases, the first phase is the determination of the model development stage and the AfL with peer assessment are included in research and development. In this stage, be done data collection, prototype planning model,Focus Group Discussion (FGD) were implemented and manufacture of prototype model then be tested. Tests carried out by 4 learning cycles.The second phase was to test the effectiveness of a model that includes quasi-experimental research by design research 2×3. The population of this research was eleven grade students of Karang pandan Senior High School of the first semester of the academic year 2012/2013. Samples were divided into two groups,experimental and control groups. The data analysis technique of this research that being used inthis study was unbalanced two-way analysis of variance.Based on the result of the analysis, we can conclude that:(1) the model of the AfL with peer assessment can be applied in Karangpandan Senior High School State. During the implementation of theAfL with peer assessment, the students being involved in learning and assessment learning, so more enjoyable and mathematics achievementof students is also increasing (2)students taught using AfL with peer assessment have mathematics achievement better than students taught using direct instruction, (3) students with kinesthetics learning style have higher mathematics achievement thanstudents with visual and auditory, while students with a visual learning style have a better achievement than students with auditory learning style, (4)at all the kinds of learning styles, students with applied learning AfL with peer assessment have better mathematics achievement than students with direct learning.Keywords: Assessment, Assesment for Learning (AfL), Peer Assessment, Learning Styles

PERANAN K 3 DALAM MANAJEMEN BENCANA

METANA Vol 8, No 02 (2012): Volume 8 No.02 Desember 2012
Publisher : METANA

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Abstract

A disaster is an event that occurs suddenly and is continuing that adversely affect the normal pattern of life or damage to the ecosystem. It is required emergency action and incredible to help and save peoples lives and their environment. The incident could damage the structure and function of the crippling, resulting in damage and losses of lives and objects and facilities of community life. Disaster management is all efforts are embodied in an activity or series of activities undertaken to eliminate in part or all of the disaster and its impact and avoid the disaster that impacts can be minimized. Keywords : disarter management, mitigation, early worning

ANALISIS KANDUNGAN NUTRISI PADA PAKAN DENGAN FEED ADDITIVE RESIDU EKSTRAKSI KULIT MANGGIS (Garcinia Mangostana L.)

JURNAL PENGABDIAN KEPADA MASYARAKAT Vol 23, No 1 (2017)
Publisher : LPM Unimed

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Abstract

AbstrakUsaha peternakan merupakan salah satu sektor penyokong perekonomian Indonesia. Dalam menjalankan usaha peternakan dibutuhkan pakan yang berkualitas sehingga dihasilkan ternak yang berkualitas pula. Sekitar 70-80%  dari biaya total untuk pengelolaan peternakan dibutuhkan untuk pakan, sehingga perlu adanya inovasi untuk memformulasikan pakan sehingga mampu menekan biaya yang dibutuhkan peternak dan meningkatkan pendapatan. Tujuan dari penelitian ini adalah memperoleh pakan yang diformulasikan dengan ampas ekstraksi dengan sifat fisik yang memenuhi standar dan kandungan nutrisi yang sesuai.  Hasil yang diperoleh menunjukan bahwa pakan masih memiliki kelembaban yang tinggi, akan tetapi memiliki kandungan energi total dan protein yang tinggi.Kata Kunci : residu, kulit manggis, feed additive, pakan, kandungan nutrisi Abstract Farm is one of the supporting sectors of the Indonesian economy. In carrying out farm, quality feed required to produce quality livestock.  Approximately 70-80% of the total cost required to feed livestock management, so the need for innovation to formulate feed so as to reduce the cost required farmers and increase revenue. The outcome of this study was to obtain formulated feed with the residual extraction of Garcinia mangostana L with physical properties that meet the standards and nutrient content accordingly. The results showed that feed still has a high humidity, but has a total high total energy and proteinKeywords: feed additive, nutrition content, mangosteen 

PENGENDALIAN MUTU BETON PADA PELAKSANAAN JALAN DENGAN PERKERASAN KAKU

METANA Vol 9, No 01 (2013): Volume 9 No. 01 Juli 2013
Publisher : METANA

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Abstract

Abstract Concrete as a building material has advantages compared with other materials because of its strength, easy to shape as desired designer, easy to work, easy to obtain raw materials, densities, treatment is relatively simple and economical considerations. As a material for rigid pavement on the highway project, treatment is similar to other construction work. Failure to avoid a construction that needs to be done according to standard and quality control requirements in SNI-03-1734-1989 on the concrete and SNI-03-1737-1989 on the highway as well as the international consensus as ASTM, ACI, etc.. Quality control includes the preparation of concrete materials, mixing, transporting, placing and casting the mixture, compacting the mixture, treatment and final concrete work. Specimen testing performed to evaluate the quality of the work. Of this evaluation will be concluded whether the work is in accordance with the plan.   Key word : Concrete, rigid pavement