Claim Missing Document
Check
Articles

Found 36 Documents
Search

Enhanced biogas production from rice straw with various pretreatment : a review Fahriya Puspita Sari; Budiyono Budiyono
Waste Technology Vol 2, No 1 (2014)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (686.424 KB) | DOI: 10.14710/2.1.17-25

Abstract

Rice straw is one of organic material that can be used for sustainable production of bioenergy and biofuels such as biogas (about 50-75% CH4 and 25-50% CO2). Out of all bioconversion technologies for biogas production, anaerobic digestion (AD) is a most cost-effective bioconversion technology that has been implemented worldwide for commercial production of electricity, heat, and compressed natural gas (CNG) from organic materials. However, the utilization of rice straw for biogas production via anaerobic digestion has not been widely adopted because the complicated structure of the plant cell wall makes it resistant to microbial attack. Pretreatment of recalcitrant rice straw is essential to achieve high biogas yield in the AD process. A number of different pretreatment techniques involving using physical pretreatment (hydrothermal and freeze), chemical pretreatment (sodium carbonate – sodium sulfite, hydrogen peroxide, NMMO, alkaline, and dilute acid) and biological pretreatment (fungal pretreatment) also combined pretretment (microwave irradiation and chemical) approaches have been investigated, but there is no report that systematically compares the performance of these pretreatment methods for application on rice straw for biogas production. This paper reviews the methods that have been studied for pretreatment of rice straw for delignification, reducing sugar, and conversion to biogas. It describes the AD process, structural and compositional properties of rice straw, and various pretreatment techniques, including the pretreatment process, parameters, performance, and advantages vs. drawbacks.
REDUCE CO ON CAR BY USING ZEOLITE MIFTAH FARHANA; Budiyono Budiyono; Nikie Astorina Yunita Dewanti; Wahyu Bambang Widayatno
Widyariset Vol 6, No 2 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.2.2020.107-115

Abstract

The number of vehicles in Jakarta increased by 5.66% from 2016. Vehicles have the highest contribution to air pollution, which is 70% of other activities. The purpose of this study was to determine the reduction of CO with zeolite pellets. This type of research is a quasi-experimental design with a non-equivalent control group design pre-test post-test design. The emission test instrument uses the automotive gas analyzer HESBOHN, a tachometer to measure engine speed, laptops, and stopwatches. The material used is activated natural zeolite pellets. Data were analyzed by univariate in the form of CO adsorption power efficiency, average, minimum, and maximum. The variables used are pellet drying time (3 hours and 24 hours) and engine speed (idle and 1250 rpm). The result of CO adsorption power efficiency using the most optimal zeolite pellets is Pellet I with 3 hours drying at 1250 rpm by 52%. While the lowest yield is Pellet II with 24-hour drying at idle conditions of 22%. The most effective CO emission reduction is by using Pellet I at 1250 rpm.
PENGARUH pH DAN RASIO COD:N TERHADAP PRODUKSI BIOGAS DENGAN BAHAN BAKU LIMBAH INDUSTRI ALKOHOL (VINASSE) Gita Khaerunnisa; Ika Rahmawati; B Budiyono
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 3, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (200.219 KB)

Abstract

Industrial waste ethanol, which vinasse is one potential source to be processed into biogas. This study was conducted to assess the potential of vinasse waste and comparison nutrients needed to obtain biogas with optimum results. Experiments conducted in the digester volume 5L, operated at room temperature and neutral pH by varying the ratio of COD: N: P 800:7, 900:7, 1000:7 on vinasse mixture, rumen, urea and vinasse mixture , rumen, and NH4HCO3 within 30 days. Respons which taken from this research are influence of pH, ratio of COD:N and nutrition to biogas production. The optimum condition of pH in producing biogas is at 7. Production of biogas produced at the optimum ratio of COD: N: P 800:7 is equal to 280 ml (0,96 ml biogas/mg TS COD) in a mixture of vinasse, rumen, urea and 3839 ml (13,73 ml biogas/mg TS COD)  in a mixture of vinasse, rumen, NH4HCO3 due to the comparison easier bacteria decompose organic compounds. While vinasse mixture, rumen, and NH4HCO3 produces more biogas than vinasse mixture, rumen, urea may be due NH4HCO3 to maintain the pH range so that the bacteria can survive.
SYNTHESIS AND CHARACTERIZATION OF POLYIMIDE-ZEOLITE MIXED MATRIX MEMBRANE Budiyono Budiyono; Tutuk Djoko Kusworo; Ahmad Fauzi Ismail; I Nyoman Widiasa; Seno Johari; Sunarso Sunarso
Reaktor Volume 12, Nomor 4, Desember 2009
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1285.674 KB) | DOI: 10.14710/reaktor.12.4.245 – 252

Abstract

Biogas has become an attractive alternative energy source due to the limitation of energy from fossil. In this study, a new type of mixed matrix membrane (MMM) consisting of polyimide-zeolite was synthesized and characterized for biogas purification. The MMM consists of medium concentration of polymer (20% wt polyimide), 80% N-Methyl-2-pyrrolidone (NMP) and 25% zeolite 4A in total solid were prepared by a dry/wet phase inversion technique.  The fabricated MMM was characterized using SEM, DSC, TGA and gas permeation. Post treatment coating procedure was also conducted. The research showed that surface coating by 3% silicone rubber toward MMM PI 20% gave the significant effect to improve membrane selectivity. The ideal selectivity for CO2/CH4 separation increased from 0.99 for before coating to 7.9 after coating for PI-Zeolite MMM, respectively. The results suggest that PI-Zeolite MMM with good post treatment procedure will increase the membrane selectivity and permeability with more saver polymer requirement as well as energy saving due to low energy for mixing.
Analisis Kualitas Air Sungai Guna Menentukan Peruntukan Ditinjau Dari Aspek Lingkungan Dedy Anwar Saleh Pohan; Budiyono Budiyono; Syafrudin Syafrudin
Jurnal Ilmu Lingkungan Vol 14, No 2 (2016): Oktober 2016
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1157.886 KB) | DOI: 10.14710/jil.14.2.63-71

Abstract

ABSTRAKSungai Kupang adalah salah satu sungai yang mengalir di Kota Pekalongan yang menerima limbah, baik dari industri, pertanian maupun domestik, Perkembangan industri dan pemukiman di sepanjang aliran sungai Kupang telah mempengaruhi kualitas air sungai. Penurunan kualitas air ditandai dengan perubahan warna air dan bau padahal sebahagian masyarakat di pinggiran sungai masih memanfaatkan air Sungai Kupang untuk kebutuhan sehari-hari. Penelitian ini bertujuan untuk menganalisis kualitas air sungai Kupang berdasarkan baku mutu kualitas air sungai menurut PP Nomor 82 Tahun 2001, menghitung beban pencemar Sungai Kupang dan menentukan Status Mutu Air serta merekomendasi upaya pengelolaan kualitas air Sungai Kupang Pekalongan. Pengukuran kualitas air dilakukan pada 6 titik pengambilan sampel. Parameter yang diukur dan diamati adalah parameter Temperatur, TSS, pH, DO, BOD, COD, Kromium dan Phosphat. Untuk analisis Status mutu air Sungai Kupang dengan menggunakan metode indeks pencemaran dan daya tampung beban pencemaran dengan menggunakan metode Qual2Kw. Hasil penelitian pada kualitas air Sungai Kupang menunjukkan parameter  COD di beberapa titik telah melebihi baku mutu. Sedangkan untuk parameter BOD di semua titik telah melebihi baku mutu yang dipersyaratkan. Nilai konsentrasi BOD terendah adalah sebesar 5,75 mg/l, sedangkan nilai BOD tertinggi sebesar 27 mg/l. Kandungan BOD meningkat diduga karena sepanjang aliran sungai yang di mulai dari hulu hingga hilir banyak menerima limbah buangan, sementara berdasarkan status mutu air menunjukkan penurunan kualitas air dari hulu sampai ke hilir sungai, dimana pada bagian hilir telah tercemar ringan. Dan untuk hasil perhitungan beban pencemaran Sungai Kupang dari hulu ke hilir mengalami peningkatan, untuk beban pencemaran konsentrasi TSS adalah sebesar 20.670,334 kg/hari, sedangkan konsentrasi COD adalah sebesar 16.517,777 kg/hari, dan konsentrasi BOD yaitu sebesar 6.618,643 kg/hari.Kata kunci: Water Quality, Pollution Load, Kupang River ABSTRACTSungai Kupang is one of the rivers that flow in Pekalongan city that receives the waste, both from industrial, agricultural and domestic, industrial and residential development along the river Kupang have affected the quality of river water. Water quality degradation characterized by changes in water color and odor when sebahagian riverside communities still use river water Kupang for everyday needs. This study aimed to analyze the water quality of the river Kupang based on river water quality standards in accordance with Regulation No. 82 of 2001, calculating the pollutant load Sungai Kupang and determine Air Quality Status and recommend management measures Pekalongan Kupang River water quality. Water quality measurements performed at 6 sampling points. Parameters measured and observed are the parameters of temperature, TSS, pH, DO, BOD, COD, chromium and Phosphate. For the analysis of the water quality of Sungai Kupang status using the pollution index and pollution load capacity using Qual2Kw.The results of research on water quality of Sungai Kupang shows COD parameter at some point has exceeded the standard quality. As for the parameters BOD at all points have exceeded the quality standards required. BOD value is the lowest concentration of 5.75 mg / l, while the highest value of BOD of 27 mg / l. The content of BOD increased presumably because the watershed is in from upstream to downstream received many waste dumps, while based on the status of water quality showed a decrease in water quality from upstream to downstream, which in part has been lightly polluted downstream. And also for the calculation of pollution loads Kupang River from upstream to downstream has increased, to the pollution load of TSS concentration amounted 20670.334 kg / day, while the COD concentration is equal to 16517.777 kg / day, and the BOD concentration is equal to 6618.643 kg /day.Keywords:  Water Quality, Pollution Load, Kupang RiverCara sitasi: Pohan, D. A. S., Budiyono, Syafrudin. (2016). Analisis Kualitas Air Sungai Guna Menentukan Peruntukan Ditinjau dari Aspek Lingkungan di Sungai Kupang Kota Pekalongan. Jurnal Ilmu Lingkungan,14(2),63-71, doi:10.14710/jil.14.2.63-71
Kinetic Study of Anaerobic Digestion of Ketchup Industry Wastewater in a Three-stages Anaerobic Baffled Reactor (ABR) Indro Sumantri; Budiyono Budiyono; Purwanto Purwanto
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 2 Year 2019 (August 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (785.981 KB) | DOI: 10.9767/bcrec.14.2.2838.326-335

Abstract

The anaerobic digestion of the ketchup industry’s wastewater in a three-stage 60 L capacity baffled reactor has been studied. The effect of concentrations of the initial chemical oxygen demand (2727.3-12086.7 mg/L), on the ABR performance and kinetic models were investigated. The ABR performance was evaluated by measuring the concentrations of each compartment of the COD, calculating its percentage removal, and the acquired data were fitted to the kinetic models. From the initial input, the three-stage ABR successfully removed 90 % of COD, for the initial COD until the concentration was 5324.6 mg/L it achieved stationary phase with HRT 5-10 days, while for initial COD until the concentration was 12086.7 mg/L is attained, the stationary was at 10 days. The kinetic model of second order Grau was suitable for the data, with k2 of 0.6061 d-1 and R2 of 0.9955. 
REDUCE CO ON CAR BY USING ZEOLITE MIFTAH FARHANA; Budiyono Budiyono; Nikie Astorina Yunita Dewanti; Wahyu Bambang Widayatno
Widyariset Vol 6, No 2 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.2.2020.107-115

Abstract

The number of vehicles in Jakarta increased by 5.66% from 2016. Vehicles have the highest contribution to air pollution, which is 70% of other activities. The purpose of this study was to determine the reduction of CO with zeolite pellets. This type of research is a quasi-experimental design with a non-equivalent control group design pre-test post-test design. The emission test instrument uses the automotive gas analyzer HESBOHN, a tachometer to measure engine speed, laptops, and stopwatches. The material used is activated natural zeolite pellets. Data were analyzed by univariate in the form of CO adsorption power efficiency, average, minimum, and maximum. The variables used are pellet drying time (3 hours and 24 hours) and engine speed (idle and 1250 rpm). The result of CO adsorption power efficiency using the most optimal zeolite pellets is Pellet I with 3 hours drying at 1250 rpm by 52%. While the lowest yield is Pellet II with 24-hour drying at idle conditions of 22%. The most effective CO emission reduction is by using Pellet I at 1250 rpm.
Study of Polymeric Membranes Potential for Eugenol Purification from Crude Clove leaf Oil Tutuk Djoko Kusworo; Danny Soetrisnanto; Widayat Widayat; Budiyono Budiyono; Dani Puji Utomo
ASEAN Journal of Chemical Engineering Vol 18, No 2 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.391 KB) | DOI: 10.22146/ajche.49539

Abstract

Clove oil is an agricultural commodity with economic value. This essential oil can be obtained from flowers, stems, and leaves of clove plants. The quality of clove oil can be evaluated from eugenol levels in oil. An increase in eugenol levels from 70% to 98% can increase oil prices by up to 3 times. Oil obtained from clove leaves has a low eugenol content of 60-70%, therefore the purification is needed to improve the quality of oil. Membrane based separation for eugenol purification was suggested in this paper as new concept in essential oils purification processes. This study aimed to explore the suitable polymer as membrane material for eugenol purification. PES, PA, CA and PI were used in this study, where the membranes were prepared via NIPS technique using manual casting knife to form flat sheet membranes. The membranes were immersed in eugenol to evaluate the solubility. The insoluble membrane was used for purification performance test in membrane filtration cell. The results show that PES and PA membranes were completely dissolved in eugenol in less than 1 minute, while PI and CA membranes were insoluble in eugenol. However, the PI membrane has much lower solvent permeability than CA membrane. The thermal annealed PES membrane for 3 h at 180°C dissolved in eugenol in 30 minutes for complete dissolution. It is concluded that PI and CA membranes can be used as membrane material for eugenol purification but CA more favorable, while PES membrane has a potential for similar purposes after being thermal annealed. However, these findings can offer an important reference for the application of polymeric membranes for clove oil purification through an effective and efficient process.
PELATIHAN PEMBUATAN BUNGA ARTIFICIAL DARI SAMPAH PLASTIK KRESEK DI DESA KANGKUNG, KECAMATAN MRANGGEN, KABUPATEN DEMAK Iman Setiono; Heny Kusumayanti; Pangi Pangi; Ida Hayu Dwimawanti; Budiyono Budiyono; Agus Purwanto; Zulfaidah Aryani
Jurnal Pengabdian Vokasi Vol 1, No 2 (2019): Nopember 2019
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (582.338 KB)

Abstract

The use of plastic packaging in today's conditions is very worrying, because the plastic is very difficult and long to decompose will cause environmental pollution. As one way to reduce plastic waste is to make plastic waste into useful items of economic value. To realize this goal, a training was held in the Kangkung Village, Mranggen sub-district, Demak Regency, for Family Welfare Empowerment Members in the local village. The method used is an experiment with direct practice. The results obtained turned out that the plastic flowers were successfully made by Family Welfare Empowerment Members and successfully sold.
Systematic Review: Paparan Karbon Monoksida Dan Gangguan Tekanan Darah Pada Dewasa Dan Lansia Humaira Rofidah Zahra; Budiyono Budiyono; Nurjazuli Nurjazuli
JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan Vol 18 No 2 (2021): Jurnal Kesehatan Lingkungan Volume 18 No. 2, Juli 2021
Publisher : Poltekkes Kemenkes Banjarmasin Jurusan Kesehatan Lingkungan Banjarbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (394.39 KB) | DOI: 10.31964/jkl.v18i2.305

Abstract

The most common blood pressure disorders are high blood pressure and low blood pressure. One of the risk factors that is assumed to affect blood pressure is carbon monoxide exposure. This study aims to collect information about the association between carbon monoxide exposure and blood pressure disorders in adults and the elderly. Articles were collected through national journals database namely Portal Garuda and Google Scholar, and international journals through Pubmed, Scopus, and PROQUEST. The keyword combinations used are ‘karbon monoksida’, ‘tekanan darah’, ‘COHb’, ‘polusi udara’, ‘tekanan darah sistolik’, ‘tekanan darah diastolik’, ‘carbon monoxide’, ‘blood pressures’, ‘systolic blood pressure’, and ‘diastolic blood pressure’. The article search found out 20 articles eligible for inclusion criteria. The literature review shows the relationship between CO exposure and blood pressure. CO exposure can be at risk increased systolic blood pressure from 0.43 mmHg to 15 mmHg, as well as an increase in diastolic blood pressure from 0.39 mmHg to 9 mmHg. Acute or chronic carbon monoxide exposure has been shown to affect disorders on blood pressure characterized by an increase in both systolic and diastolic blood pressure.