Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan最新文献

{"title":"Usulan Strategi Mitigasi Risiko Aktivitas Proses Bisnis Dengan Menggunakan Metode House of Risk Di PT. Coppal","authors":"Ayu Zeka Ginianti, H. Rukmi","doi":"10.26760/jrh.v6i1.34-44","DOIUrl":"https://doi.org/10.26760/jrh.v6i1.34-44","url":null,"abstract":"ABSTRAKPT. Coppal merupakan perusahaan yang bergerak di bidang moulding, jig and fixture, general component dan die casting. PT. Coppal dalam menjalankan aktivitas proses bisnisnya berpotensi menimbulkan berbagai risiko yang berbeda jenis, dampak, dan frekuensinya. Penelitian ini dilakukan untuk mengidentifikasi risiko dan memberikan usulan strategi mitigasi untuk risiko yang menjadi prioritas dengan menggunakan metode Supply Chain Operations Reference (SCOR) dan House of Risk (HOR) untuk meminimasi dampak yang dapat merugikan perusahaan. Hasil yang diperoleh untuk HOR Fase I proses plan sebanyak 27 risk agent, proses source 24 risk agent, proses make 45 risk agent, proses deliver 21 risk agent, dan proses return 14 risk agent. Sedangkan hasil yang diperoleh untuk HOR Fase II proses plan sebanyak 7 usulan, proses source 10 usulan, proses make 14 usulan, proses deliver 7 usulan, dan proses return 9 usulan.ABSTRACTPT. Coppal is a company engaged in molding, jig and fixture, general component and die casting. PT. Coppal in carrying out its business process activities has the potential to pose various risks of different types, impacts, and frequencies. This research was conducted to identify risks and propose mitigation strategies for priority risks using the Supply Chain Operations Reference (SCOR) and House of Risk (HOR) methods to minimize the impact that could harm the company. The results obtained for HOR Phase I are 27 risk agents in the plan process, 24 risk agents source processes, 45 risk agents make processes, 21 risk agents deliver processes, and 14 risk agents return processes. While the results obtained for HOR Phase II are 7 proposed, source process 10 proposed, process make 14 proposed, process deliver 7 proposed, and process return 9 proposed.","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43483405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Urea-Formaldehid Konsentrat Sebagai Bahan Baku Resin Urea-Formaldehid","authors":"Dila Athariqa, Selvi Mayangsari Oktapia, Dicky Dermawan","doi":"10.26760/jrh.v6i1.11-21","DOIUrl":"https://doi.org/10.26760/jrh.v6i1.11-21","url":null,"abstract":"ABSTRAKPanel kayu merupakan produk yang terbuat dari bahan kayu yang direkatkan dengan menggunakan resin, bahan perekat yang digunakan dalam produksi kayu lapis merupakan resin urea-formaldehid (UF). Resin UF adalah resin thermosetting yang terbuat dari urea dan formaldehid yang akan mengeras jika dipanaskan dan dapat dicetak ulang. Pada penelitian ini, pembuatan resin UF menggunakan bahan baku dari Urea Formaldehyde Concentrate (UFC). Tujuan dari penelitian ini mempelajari pengaruh perubahan sifat dan kinerja resin UF dari UFC, pengaruh rasio molar pada tahap metilolasi dan kondensasi, dan menguji efektivitas resin UF melalui aplikasi pembuatan panel kayu dengan cara menguji Internal Bonding (IB) Strength dan emisi formaldehid. Berdasarkan penelitian yang telah dilakukan maka didapatkan bahwa pembuatan resin UF dengan bahan baku UFC memiliki gel time yang lebih panjang sehingga menurunkan IB Strength, dan free formaldehyde yang rendah sehingga emisi formaldehid akan menurun dibandingkan dengan nilai IB Strength maupun emisi formaldehid dari resin UF dari urea dan formaldehid.ABSTRACTWood panel are a product made of a wood inggriidients glued together by using resin. The main adhesive used in plywood production is urea-formaldehyde resin (UF). UF resin is a thermosetting resin made from urea and formaldehyde, where this resin to be hardened if heated and reprinted. The purpose of this research is affects changes in properties and performance from UF resin made from UFC, effects of molar ratio at the metylolation and condentation stage, and tests the effectiveness of UF resin with a wooden paneling application by testing Internal Bonding (IB) Strength, and formaldehyde emission. According to this research it has been obtained that UF resin with UFC material has a lengthly gel time therefor lower IB Strength value, and low free formaldehyde so that formaldehyde emission will decreased when compared with IB Strength value as well as formaldehyde emissions from UF resin with urea and formaldehyde materials.","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49361108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Dispersi Karbonmonoksida (CO) dari Transportasi di Jalan HR. Soebrantas Pekanbaru dengan Model Gaussian Line Source","authors":"M. I. Fermi, Aryo Sasmita, Shinta ' Elystia, M. H. Alfarobi","doi":"10.26760/jrh.v5i3.218-227","DOIUrl":"https://doi.org/10.26760/jrh.v5i3.218-227","url":null,"abstract":"ABSTRAKJalan HR. Soebrantas diklasifikasikan sebagai jalan arteri yang difungsikan untuk aktifitas pelayanan jasa dan distribusi masyarakat didalam kota. Aktifitas kendaran dijalan ini akan mempengaruhi besarnya emisi gas pencemar udara yang dihasilkan dari kendaraan. Tujuan dari penelitian ini yaitu untuk mengestimasi emisi karbon monoksida (CO) dan memetakan pola dispersinya dari kendaraan yang melintasi Jalan HR. Soebrantas. Metode yang digunakan yaitu mengukur konsentrasi CO, kecepatan dan arah angin, ketinggian knalpot, menghitung jumlah kendaraan (traffic counting) yang melintasi jalan HR. Soebrantas dan dimodelkan dengan Gaussian Line Source. Hasil penelitian ini menunjukkan konsentrasi CO dari jumlah kendaraan yang diprediksi dengan model Gaussian tertinggi pada hari Senin pukul 16.00-17.00 WIB dengan nilai 5,27x10-8 ppm di titik I dan terendah pada hari Minggu pukul 10.00-11.00 WIB dengan nilai 5,21x10-13 ppm di titik III. Berdasarkan pemetaan model Gaussian, konsentrasi CO tertinggi ditandai dengan area berwarna merah dengan jumlah kendaraan mencapai 10.911 unit/jam.Kata kunci: Kota Pekanbaru, Emisi Transportasi, Dispersi COABSTRACTHR. Soebrantas street is classified as a arterial road that used to service and public distribution activities in the city. Traffic activity at this street will affect the amount of gas pollutant emissions generated from the vehicles. The purpose of this study is to estimate the carbon monoxide (CO) emissions emitted from vehicles and mapping its distribution pattern of from the traffic counting of vehicle at HR. Soebrantas Street. The method used is measuring the concentration of CO, speed and wind directions, exhaust height, traffic counting at HR. Soebrantas Street and modelled by Gaussian Line Source. The results of this study show that the CO concentrations from traffic counting predicted by the Gaussian model is the highest on Monday at 04.00-05.00 P.M with value of 5,27x10-8 ppm at point I and the lowest is on Sunday at 10.00- 11.00 A.M with value of 5,21x10-13 ppm at the point III. Based on mapping from the Gaussian model, the highest CO concentrations is marked with red area with vehicle increasing until 10.911 units/hour.Keywords: Pekanbaru City, Transportation emission, CO dispersion","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48526389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tofu Wastewater Treatment by using Sequencing Batch Reactor (SBR) with Variation of Feeding Rates","authors":"H. Budiastuti, Ririn Rismawati, Luthfiana Nurfauziah, L. I. Ramadhani, Emma Hermawati Muhari","doi":"10.26760/jrh.v5i3.197-206","DOIUrl":"https://doi.org/10.26760/jrh.v5i3.197-206","url":null,"abstract":"ABSTRAKLimbah cair tahu dari industri tahu di Kabupaten Bandung Barat memiliki kandungan senyawa organik yang tinggi. Salah satu sistem pengolahan air limbah yang dapat dilakukan secara efektif adalah Sequencing Batch Reactor (SBR). Tujuan dari penelitian ini adalah untuk mengetahui peforma terbaik SBR dalam meningkatkan efisiensi pengolahan limbah cair tahu. Pada penelitian ini dilakukan pembibitan (seeding), aklimatisasi, dan sistem SBR dengan tahapan variasi kecepatan pengumpanan. Kecepatan pengumpanan SBR pada saat pembibitan (seeding), aklimatisasi, dan running 1 sebesar 200 ml/hari dan sebesar 400 ml/hari pada saat running 2. Hasil penelitian ini memperoleh penurunan konsentrasi COD terbaik dari 8.000 mg/L menjadi 96 mg/L diperoleh pada running 1 dan penurunan konsentrasi COD dari 8.000 mg/L menjadi 160 mg/L diperoleh pada running 2. Efisiensi tertinggi yang dihasilkan adalah 98,8% pada running 1 dan 98% pada running 2.Kata kunci : Limbah cair tahu, Sequencing Batch Reactor (SBR), Kecepatan Pengumpanan ABSTRACTTofu wastewater collected from the tofu industries in West Bandung Regency has a high organic content. One of the wastewater treatment systems that can be applied effectively is the Sequencing Batch Reactor (SBR) system. The purpose of this study was to find out the best performance of SBR in improving the efficiency of tofu wastewater treatment. This study conducted seeding, acclimatization, and SBR system that varied the feeding rates to find optimum value. The SBR feeding rate at the times of seeding, acclimatization, and running 1 amounted to 200 ml/day and amounted to 400 ml/day at the time of running 2. The results of this study were the best reduction in COD concentration from 8,000 mg/L to 96 mg/L obtained in the first running and reduction in COD concentration from 8,000 mg/L to 160 mg/L obtained in 2nd running. The highest efficiency produced was 98.8% on the first running 1 and 98% obtained from the 2nd running.Keywords: Tofu Wastewater, Sequencing Batch Reactor (SBR), Feeding Rates","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41971852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sintesis Selulosa Asetat dari Tanaman Lidah Mertua (Sansevieria trifasciata) sebagai Membran Pereduksi CO (Karbon Monoksida) pada Asap Rokok","authors":"Venesa Thalia Putri, A. Pramita, Theresia Evila Purwanti Sri Rahayu","doi":"10.26760/jrh.v5i3.281-290","DOIUrl":"https://doi.org/10.26760/jrh.v5i3.281-290","url":null,"abstract":"ABSTRAKPenelitian ini bertujuan untuk mengetahui proses pembuatann membran selulosa dari tanaman Lidah mertua (Sansevieria trifasciata) yang mampu menurunkan kadar gas CO (karbon monoksida). Terdapat beberapa tahapan diantaranya persiapan alat dan bahan; proses ekstraksi yang terdiri dari delignifikasi dan bleaching; proses sintesis yang terdiri dari swelling-up, asetilasi, dan hidrolisis; uji kadar asetil selulosa; pembuatan membran selulosa, serta tahap pengujian dan analisis data yang dilakukan secara kuantitatif dan instrumentasi. Hasil penelitian ini adalah lidah mertua dapat diolah menjadi filter berbentuk membran yang mampu mereduksi karbon monoksida melalui proses sintesis selulosa asetat. Efektivitas membran selulosa Sansevieria trifasciata dalam menurunkan kandungan karbon monoksida pada rokok yang dibakar selama 5 menit adalah sebesar 70% ketika berada di dalam ruangan dan 87% ketika berada di luar ruangan. Pembuatan membran harus dilakukan dengan mengamati jenis bahan, kondisi CH3COOH, perlakuan setelah asetilasi, suhu oven, kadar asetil, dan homogenitas.Kata kunci: efektivitas, karbon monoksida, Lidah mertua, membran selulosa, merokok.ABSTRACTThis study aims to determine the process of making cellulose membranes from the mother-in-law's tongue plant (Sansevieria trifasciata) which is able to reduce CO (carbon monoxide) gas levels. There are several stages including the preparation of tools and materials; extraction process consisting of delignification and bleaching; synthesis process consisting of swelling-up, acetylation, and hydrolysis; test for acetyl cellulose content; manufacture of cellulose membranes, as well as the stages of testing and data analysis carried out quantitatively and instrumentation. The result of this research is that mother-in-law's tongue can be processed into a membrane-shaped filter that is able to reduce carbon monoxide through the synthesis of cellulose acetate. The effectiveness of Sansevieria trifasciata cellulose membrane in reducing the carbon monoxide content in cigarettes burned for 5 minutes was 70% when indoors and 87% when outdoors. The manufacture of membranes must be carried out by observing the type of material, CH3COOH conditions, treatment after acetylation, oven temperature, acetyl content, and homogeneity.Keywords: carbon monoxide, cellulose membrane, effectiveness, Sansevieria trifasciata, smoking.","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48791345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengolahan Limbah Cair Lindi Menggunakan Multi Soil Layering (MSL) Bebasis Lumpur PDAM","authors":"W. Ivontianti, Eva Pramuni Oktaviani Sitanggang, Elly Sri Rezeki","doi":"10.26760/jrh.v5i3.228-237","DOIUrl":"https://doi.org/10.26760/jrh.v5i3.228-237","url":null,"abstract":"ABSTRAKTelah dilakukan penelitian pengolahan lindi dari TPA Rasau Jaya Kubu Raya Kalimantan Barat dengan Multi Soil Layering (MSL). Tujuan penelitian ini adalah mengetahui pengaruh waktu tinggal terhadap kinerja MSL berbasis lumpur PDAM dalam mengolah limbah cair lindi. Penelitian ini menggunakan reaktor MSL dengan dimensi 20 x 38 x 55 cm, lapisan aerob berupa zeolit berukuran 3–5 mm dan campuran lapisan anaerob yaitu lumpur PDAM dan arang. Berdasarkan hasil pengujian konsentrasi amonia, pH, TSS dan COD sebelum pengolahan dengan MSL adalah Amonia 88 mg/l, pH 7,7 mg/l, TSS 80 mg/l, dan COD 832 mg/l. Adapun hasil dari penelitian ini didapatkan waktu tinggal optimum yaitu selama 12 jam dengan efisensi penurunan untuk masing-masing parameter pencemar yaitu: Amonia 96,59%; pH 7,5; TSS 85%, dan COD 44,83%. Hasil ini menunjukkan bahwa reaktor mampu menurunkan amonia, pH, TSS, COD.Keywords: multi soil layering, lumpur PDAM, waktu tinggal, lindiABSTRACTResearch of leachate treatment was conducted from TPA Rasau Jaya Kubu Raya West Kalimantan with Multi Soil Layering (MSL) method. Result of this research is to determine the influence of detention time on the performance of MSL based PDAM mud. The MSL reactors have dimensions of 20 x 38 x 55 cm, consist of zeolite (3-5 mm) as aerobic layers and a mixture of of PDAM mud and charcoal as anaerobic layers. Based on the test results of ammonia concentration, pH, TSS and COD before treatment are Ammonia 88 mg/l, pH 7.7 mg/l, TSS 80 mg/l, and COD 832 mg/l. The results of this study obtained optimum detention time is 12 hours with efficiency of pollutant removal for each parameter are Ammonia 96,59%; pH 7,5; TSS 85%, and COD 44,83%. These result shows that the reactor capable to decrease pollutant parameter such as ammonia, pH, TSS, and COD.Keywords: multi soil layering, PDAM-sludge, detention time, leachate","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44746544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pengelolaan LB3 di Perusahaan Listrik Negara PUSHARLIS UP2 WIII Bandung","authors":"Eka Wardhani, Muhammad Viqi Rafianto","doi":"10.26760/jrh.v5i3.267-280","DOIUrl":"https://doi.org/10.26760/jrh.v5i3.267-280","url":null,"abstract":"ABSTRAKPUSHARLIS UP2 WIII merupakan workshop yang bergerak dalam bidang desain, reverse engineering peralatan ketenagalistirkan, manufaktur dan perbaikan peralatan ketenagalistrikan. Proses yang terjadi di workshop ini menghasilkan LB3. Maksud penelitian ini adalah mengetahui seberapa besar tingkat kepatuhan pengelolaan LB3 di PUSHARLIS UP2 WIII Bandung terhadap aturan yang berlaku. Berdasarkan identifikasi dihasilkan tujuh jenis LB3 yaitu Coolant bekas (A345-1), sludge logam Fe dan Al (A345-2), sarung tangan dan kain majun, terkontaminasi (B110D), limbah terkontaminasi B3 (A108d), limbah elekronik (lampu TL, PCB, karet kawat) (B107d), oli bekas (B105d), Toner (B353-1), dan kemasan bekas B3 (cat, solvent, dan freon) (B104d). Pengelolaan LB3 telah dilakukan dengan baik mulai dari pengemasan, penyimpanan di TPS, pelabelan, dan pengangkutan ke pihak ketiga berizin. Hal yang harus ditingkatkan yaitu melengkapi fasilitas tanggap darurat di TPS LB3 antara lain dengan fasilitas pertolongan pertama pembersih mata dan alarm sebagai peringatan dini potensi kebakaran. Bangunan TPS LB3 perlu adanya simbol LB3 yang dilekati pada bagian dinding bangunan TPS LB3 sesuai dengan karakteristik dominan yang sebelumnya telah ditentukan.Kata Kunci: Pengelolaan, PUSHARLIS UP2 WIII, Limbah beracun dan berbahaya. ABSTRACTPUSHARLIS UP2 WIII is engaged in the design, reverse engineering of power equipment, manufacturing, and repair of electrical equipment. The process that occurs in this workshop produces toxic and hazardous waste (THW). The purpose of this research is to find out the level of compliance of the THW management at PUSHARLIS UP2 WIII Bandung to the applicable regulations. Based on the identification, seven types of THW were produced, namely used coolant (A345-1), Fe and Al metal sludge (A345-2), cotton cloth gloves, contaminated (B110D), waste, contaminated with THW (A108d), electronic waste (lamps, PCB, wire rubber) (B107d), used oil (B105d), Toner (B353-1), and used THW packaging (paint, solvent, and freon) (B104d). THW has been well managed, starting from packaging, storage at THW temporary storage, labeling, and transportation to licensed third parties. Things that must be improved are completing emergency response facilities at a temporary storage area THW with eyewash as the first-aid facility for eye cleaning contaminated with LB3 and an alarm as an early warning of the potential fire. The TPS THW building needs a THW symbol attached to the wall of the temporary storage area THW building based on the predetermined dominant characteristics.Key word: management, PUSHARLIS UP2 WIII, toxic and hazardous waste","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42519404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisa Perubahan BOD, COD, dan TSS Limbah Cair Industri Tekstil Menggunakan Metode Elektrooksidasi-elektrokoagulasi Elektroda Fe-C dengan Sistem Semi Kontinyu","authors":"Berliani Indah Yuniarti, Tri Widayatno","doi":"10.26760/jrh.v5i3.238-247","DOIUrl":"https://doi.org/10.26760/jrh.v5i3.238-247","url":null,"abstract":"ABSTRAKIndustri tekstil termasuk industri bahan pakaian dan batik. Dalam industri tekstil, bahan kimia dan air sangat penting untuk proses produksi. Elektrooksidasi dan elektrokoagulasi adalah metode yang sering digunakan dalam pengolahan limbah. Penelitian ini menggabungkan kedua metode untuk menentukan efektivitas pengurangan kandungan organik pada limbah cair batik. Kemudian proses pengolahan limbah dilakukan secara semi-kontinyu. Variasi yang digunakan untuk menentukan BOD, COD, dan TSS diantaranya tegangan (8, 12, 16, dan 20 volt) dan waktu untuk elektrooksidasi-elektrokoagulasi pada 15 dan 45 menit. Metode ini dapat menghasikan BOD dari 1479,9 mg/L menjadi 104,91 mg/L, dan COD dari 829,2 mg/L menjadi 212,29 mg/L, Sedangkan pada TSS nilai kandungan TSS lebih tinggi dari 3000 mg/L yaitu 9400 mg/L pada tegangan 8 volt dan waktu 15 menit, serta 23800 mg/L pada tegangan 8 volt dan waktu 45 menit. Berdasarkan penelitian ini, metode elektrooksidasi-elektrokoagulasi efisien untuk pengolahan limbah cair industri tekstil.Kata kunci: limbah cair batik, elektrooksidasi, elektrokoagulasi, semi-kontinyuABSTRACTTextile industry includes garment and batik industries. In the textile industry, chemical materials and water are crucial to the production process. This leads to generate a copious waste which requires further treatment. Electrooxidation and electrocoagulation methods are often used in waste treatment since they have a number of advantages. This research used both of these methods to determine the effectiveness of organic content reduction in batik wastewater. The wastewater treatment were treated semi-continuously. Variations used to determined BOD, COD, and TSS include voltage (8, 12, 16, and 20 volt) and time for electrooxidation-electrocoagulation at 15 and 45 minutes. The results show that the methods reduced BOD from 1479,9 mg/L to 104,91 mg/L, and COD from 829,2 mg/L to 212,29 mg/L, while in TSS the value of TSS content is higher than 3000 mg/L which is 9400 mg/L at a voltage of 8 volts and a period of 15 minutes, and 23800 mg/L at a voltage of 8 volts and a period of 45 minutes.. Based on this research, electrooxidation-electrocoagulation are relatively efficient for textile industry wastewater treatment.Keywords: batik wasewater, electroxidation, electrocoagulation, semi-continuous","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48864326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modular Vertical Garden Sebagai Solusi Praktis Urban Gardening Institut Teknologi Nasional","authors":"Muhammad Syafiqha Alfaatihah, Maharani Dian Permanasari, Alia Gita Sudrajat, Aniq Kurniatillah, Mirza Hasna Shavira, Diza Khadijah Afiff","doi":"10.26760/jrh.v5i3.207-217","DOIUrl":"https://doi.org/10.26760/jrh.v5i3.207-217","url":null,"abstract":"ABSTRAKPembangunan kota tanpa diimbangi dengan penyediaan lahan kosong untuk kawasan hijau dapat merusak lingkungan perkotaan. Menurunnya kualitas udara dan peningkatan polusi suara merupakan beberapa efek yang berdampak pada lingkungan hidup penduduk kota. Salah satu alternatif solusi untuk mengatasi permasalahan tersebut adalah dengan menerapkan vertical garden. Meningkatnya minat urban gardening, khususnya vertikultur, membuka peluang desain vertical garden yang dapat dengan mudah diterapkan di kawasan hunian. Untuk membantu meningkatkan hortikultur perkotaan, perlu dirancang vertical garden dengan mengedepankan ease of use. Penerapan sistem modular merupakan salah satu alternatif solusi untuk mencapai hal tersebut. Tujuan proyek desain ini adalah menghasilkan modular vertical garden system yang menawarkan ease of use untuk membantu penghijauan lingkungan perkotaan. Penelitian ini menggunakan metode kualitatif untuk mendeskripsikan penerapan vertical garden sebagai alternatif penghijauan dalam mendukung smart environment. Proses desain menerapkan prinsip design thinking IDEO dengan melakukan identifikasi, pengumpulan dan analisis, brainstorming, pengembangan ide konkrit, dan proses implementasi.Kata kunci: urban gardening, vertical garden, pandemi, modular, ease of use ABSTRACTUrban development without a balance provision of vacant land for green areas can damage the urban environment. Declining air quality and increasing noise pollution are some of the effects that have an impact on the citizen environment. One alternative solution to overcome these problems is to apply a vertical garden. During the Covid-19 pandemic, the increasing interest in urban farming, especially verticulture, opened up opportunities for vertical garden designs that can be easily applied in residential areas. To help improve urban horticulture, it is necessary to design a vertical garden by prioritizing ease of use. The application of a modular system is an alternative solution to achieve this. The purpose of this design project is to produce a modular vertical garden system that offers ease of use to help urban greening. This study uses a qualitative method to describe how to apply a vertical garden as an alternative to greening to support a smart environment. The design process applies IDEO's design thinking principles by identifying, collecting and analyzing, brainstorming, developing concrete ideas, and implementing the process.Keywords: urban gardening, vertical garden, pandemic, modular, ease of use","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43673782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Pengaruh Pengunaan Ulstein X-Bow pada Kapal Perintis Type 750 DWT Terhadap Nilai Hambatan dengan Metode Computational Fluid Dynamics","authors":"F. Simanjuntak, S. Samuel, Parlindungan Manik, Eko sasmito Hadi, Willma Amiruddin","doi":"10.26760/jrh.v5i3.248-266","DOIUrl":"https://doi.org/10.26760/jrh.v5i3.248-266","url":null,"abstract":"ABSTRAKHambatan merupakan aspek penting yang perlu diperhatikan dalam mendesain sebuah kapal. Salah satu upaya untuk mengurangi hambatan adalah memodifikasi bentuk haluan kapal dengan menggunakan Ulstein X-Bow. Penelitian ini bertujuan untuk mengetahui efektifitas penggunaan Ulstein X-Bow serta mencari nilai hambatan, trim dan sinkage terkecil dengan menggunakan metode CFD (Computational Fluid Dynamics) dengan teknik overset mesh. Penerapan variasi Froude Number, Stem Angle, Flare Bow, serta kondisi perairan (deep water dan medium shallow water) dilakukan untuk mendapatkan bentuk desain yang paling optimal. Hasil penelitian ini menunjukan bahwa Kapal Perintis 750 DWT dengan penggunaan Ulstein X-Bow pada kondisi perairan dalam (deep water) h/t = 19.3, dapat mengurangai nilai hambatan sebesar 4.85%, trim sebesar 2.32% dan sinkage sebesar 0.40% yang terdapat pada Model 4 dibandingkan dengan Model 1 pada Froude Number (Fn = 0.24), sedangkan pada kondisi perairan medium (medium shallow water) h/t = 4.0, nilai hambatan, trim dan sinkage terkecil terjadi pada Kapal Perintis 750 DWT tanpa penggunaan Ulstein X-Bow pada Froude Number (Fn = 0.24).Kata kunci: Hambatan, Ulstein X-Bow, Kapal Perintis 750 DWT, Computational Fluid Dynamics ABSTRACTResistance is an important aspect that needs to be considered when designing a ship. One of the ways to reduce the resistance value is to modify the shape of the ship's bow using the Ulstein X-Bow. The main objective of this research is to find out the Effectiveness of using Ulstein X-Bow and to find the smallest resistance, trim and sinkage values using the CFD (Computational Fluid Dynamics) method with mesh overset techniques. The application of variations in Froude Number, Stem Angle, Flare Bow, and water conditions (deep water and medium shallow water) is done to get the most optimal design shape.The results of this study showed that in deep water conditions (h/t = 19.3), Perintis 750 DWT using Ulstein X-Bow can reduce the resistance value by 4.85%, trim by 2.32% and sinkage by 0.40% that can be found in model 4 compared to model 1 on Froude Number (Fn = 0.24). while in medium shallow water conditions h/t = 4.0, the smallest resistance, trim and sinkage values occur on the Perintis 750 DWT ship without using Ulstein X-Bow at Froude Number (Fn = 0.24).Keywords: Resistance, Ulstein X-Bow, Perintis 750 DWT Ship, Computational Fluid Dynamic","PeriodicalId":34848,"journal":{"name":"Rekayasa Hijau Jurnal Teknologi Ramah Lingkungan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42521078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}