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All Journal TEKNIK Jurnal Teknik Lingkungan Jurnal Serambi Engineering Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi
Mochtar Hadiwidodo
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering

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PERMODELAN TRANSPORT LINDI DENGAN KONTAMINAN Pb DAN Mn MENGGUNAKAN SOFTWARE POLLUTE.v7 (STUDI KASUS TPA NGRONGGO, KOTA SALATIGA) Evelyne Hanaseta; Badrus Zaman; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 4 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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Abstract

Leachate concentration for Pb and Mn parameters from TPA Ngronggo, Salatiga  are exceed equal to Perda Jateng No. 5/ 2012, consentration of this parameters are  0,75 mg/l and 14,1 mg/l. Contamination of heavy metals are spreads from water soil current to landfill region. This landfill used controlled landfill method. Formation of lining system are gravel, geotextile, geomembrane, compacted clay, and soil. The result from monitoring well are suspicion because of transport contaminant from landfill are attain to 7,1m of depth. Simulation of this phenomena can use Pollutev.7 software, we can see 1,5 dimensional of the result. Prediction consentration for 15 years are Pb 0,6728 and Mn 12,5 mg/l.
IMOBILISASI LIMBAH RADIOAKTIF MENGANDUNG THORIUM MENGGUNAKAN BAHAN MATRIKS SYNROC Hasmaniar Septiani; Gunandjar Gunandjar; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 4 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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Abstract

Thorium waste generated from mantles factories in the form of sludge with a high water content that is derived from thorium-contaminated soil. This waste includes low activity radioactive waste of long-life alpha emitter that is harmful to humans and the environment. Based on these conditions, the immobilization process is required to confine the content of thorium. This research will develop thorium waste volume reduction by adsorption process using H-Zeolite made from Zeolite of  Lampung and imobilization process using synroc matrix material. This research emphasized the immobilization process to obtain waste synroc block with the best quality by studying the effect of sintering temperature and sintering time as well as the effect of waste loading in the formation process of  waste synroc block. The optimum condition is achieved at the waste loading 50% with the sintering temperature of 1250 ˚ C for 3 hours.
ANALISIS MANAJEMEN RISIKO STUDI KASUS : UNIT PELAKSANA TEKNIS BALAI PENGUJIAN DAN LABORATORIUM LINGKUNGAN HIDUP BADAN LINGKUNGAN HIDUP PROVINSI JAWA TENGAH Anggi Ajie Permana; Winardi Dwi Nugraha; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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Abstract

AbstrakData from the Ministry of Manpower and Transmigration mention in 2009 there have been 54,398 cases of occupational accidents in Indonesia. Working in a chemical laboratory, as well as working in the chemical industry, mining, and construction, contain risks include risks of safety (Imamkhasani, 1990). This study intend to determine the hazards that exist in the laboratory, perform risk assessments and control measures are appropriate. Hazard identification is done by reviewing aspects of human, environmental, process, system of manpower and equipment. Accident risk assessment carried out degan method of semi-quantitative analysis. The results of this study concluded that BPL2H Central Java province has 37 of hazard in all its activities. Risks in the Central Java BPL2H of research results are acceptable or low risk so the control is only carried out by reducing the intensity of activities that pose a risk to a minimum.
STUDI KEMAMPUAN VERTICAL SUBSURFACE FLOW CONSTRUCTED WETLANDS DALAM MENYISIHKAN COD, NITRIT, DAN NITRAT PADA AIR LINDI (STUDI KASUS: TPA NGRONGGO, SALATIGA) Ismaryanto Gunawan; Wiharyanto Oktiawan; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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Abstract

ABSTRACTLeachate is one of resulting negative impact from landfilling in Indonesia. In common  leachate   containing an organic and inorganic matter with high concentration. Therefore, treatment of the leachate is essential  before  it  could  be  discharged  directly  into  the receiving water bodies. One of technology to treat landfill leachate which is by use of biological treatment. But this processing apparently is still result organic and inorganic content one high enough. Therefore, necessary continuing processing alternative which is by use of system Constructed Wetlands.  This research intent to know decrease of concentration COD, nitrit and nitrate, and removal efficiency on system Vertical Subsurface Flow Constructed Wetlands  by use of plant Scirpus grossus.  Besides that, the impact of variation amount plants and residence time would  be analized. The laboratory research was conducted with use 4 reactors. Reactor A with 4 plants, reactor B with 6 plants, reactor C with 8 plants, and rector C without plant. Four of the reactors operated at a flow rate of 10,5 ml / minutes for residence time 3 days, 5,3 ml / minutes for residence time 6 days, and 3,5 ml / minutes for residence time 9 days. System Vertical Subsurface Flow Constructed Wetlands  by use of plant Scirpus grossus  (lingi) can removal concentration of COD, nitrit, and nitrate. The highest removal efficiency for COD, nitrit and nitrat were 63,4%, 57,6%, and 59,0% respectively. All of them was reached by reactor C with residence time 9 days. Besides that, decrease concentrations COD, nitrit and nitrate on system Vertical Subsurface Flow Constructed Wetlands  regarded by amount plants and residence time.
PERMODELAN TRANSPORT KADMIUM (Cd) DAN NIKEL (Ni) DALAM LINDI MENGGUNAKAN SOFTWARE POLLUTE V7 (STUDI KASUS: TPA SANGGRAHAN, TEMANGGUNG) Lintang Tyas Perdana; Badrus Zaman; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 4 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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Abstract

Sanggrahan Landfill (Temanggung), completed with  gravel, geotextile, geomembrane, and compacted clay. It’s still has  potential of contaminant mobilization through those liners that comes from solid waste in landfill. The purposes of this research  for knowing the movement cadmium (Cd) and nickel(Ni) in leachate vertically in every depth.  The contaminant movement  from active zone head  for control 1-well and  from active zone head for control 2-well could be predicted by using model pollute v7 software. Pollute v7 is one dimension model, where needed the characteristic of the liners (depth, permeability, porosity, dry density, coef dispersion of hydrodinamics). This model describe the contaminant mobilization affected by dispersion, advection, diffusion, and retardation phenomenon. Based on 12 years forward model simulation in this study, the concentration of Cd and Ni will get increase. The results showed, value of cadmium concentration in control 1-well is 0,496 mg/l and in control 2-well  is 0,4064 mg/l. Whereas, the value of nickel concentration in control 1-well is 0,382 mg/l and in control 2-well is 0,3665 mg/l. This prediction showed that  Sanggrahan Landfill has potential in leachate mobilization. The study suggests that the application of geomembrane should has lower permeability than 0,5x10-12m/s for retarding contaminant transport.
STUDI IDENTIFIKASI PENGELOLAAN AIR LIMBAH DOMESTIK KECAMATAN SEMARANG TENGAH, SEMARANG TIMUR, GAYAMSARI, DAN GENUK KOTA SEMARANG Nureka Yuliani; Wiharyanto Oktiawan; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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Abstract

ABSTRACTNowadays the society of Middle Semarang, East Semarang, Gayamsari, and Genuk subdistrict are using on site system with water closet for sanitation infrastructure and throw away the grey water to drainage. Domestic waste water management isn’t in line with growth population and city function development, and as the concequence is environment quality degradation. This research is for knowing domestic waste water management condition from four subdistricts with investigate five aspects (organization, operational, funding, legal, and society participation). The result of operational aspect analysis is off site system for Middle Semarang, East Semarang, Gayamsari, and partly of Genuk. Whereas on site system with septic tank can be applied at Trimulyo, Terboyo Wetan, and Terboyo Kulon (Genuk subdistrict). Funding aspect alternative is  partly of APBD and partly of society toll and organize local independent group which controlling finance management. The result of organization aspect analysis alternative is a organization concept from city level till RW. Based on SWOT analysis for legal and society participation is produce an legal concept, increase socialiszation to society and involve private participation.
STUDI IDENTIFIKASI PENGELOLAAN AIR LIMBAH DOMESTIK di KECAMATAN MIJEN, GUNUNGPATI, GAJAHMUNGKUR dan SEMARANG SELATAN KOTA SEMARANG Alfiza Fahmi; Wiharyanto Oktiawan; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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Abstract

Sanitation refers to the hygienic and proper management, collection, disposal or reuse of human excreta (feces and urine) and community liquid wastes to safeguard the health of individuals and communities. Sanitation have three primary objectives:Improving health conditions, promoting dignity of living or enhanced quality of life,  and protecting the environment. The combined positive effects of these conditions lead to wider economic benefit. One of sanitation component is domestic wastewater which is in fact haven’t use the proper management . Proper management can be decided by assessing current situation (sourced by primary and secondary data), gap analysis based on three aspects which is institutional aspects, technical aspects, financing aspects, legal aspects and community participation. This study identification focused on determining domestic wastewater processing system based on population density, the area physical condition, the source of water used, and the ability to finance. Whereas scope area of this identification study is Mijen, Gunungpati, Gajahmungkur and South Semarang at Semarang city. Mijen and Gunungpati has similarity at population density which is less than 150 people per ha and the area physical condition such as high permeability, ground water depth >50 meters, dominated by 2-15% slope, and also from the financial side that  range income level 1,5-3 million rupiah is still suitable for septic tank as it’s technology an on site system as its alternative system. In the other side, Gajahmungkur and South Semarang also has similarity at water used sourced which is 72% and 75%  respondent use PDAM as primary source and generally has middle class of  permeability. Both of this sub district also has population density more than 150 people per ha and the area dominated by 2-15% slope range which is all of those factor suitable for sewerage conventional as its technology.This study help the reader to make informed about the proper prossesing system of each study area and furthermore to achieve sanitation primary objectives.
PEMBUATAN PUPUK KOMPOS PADAT LIMBAH KOTORAN SAPI DENGAN METODA FERMENTASI MENGGUNAKAN EM4 DAN STARBIO DI DUSUN THEKELAN KABUPATEN SEMARANG Endro Sutrisno; Irawan Wisnu Wardhana; M. Arief Budihardjo; Mochtar Hadiwidodo; Roland Ignasius Silalahi
Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Vol 2, No 1 (2020)
Publisher : Fakultas Teknik Universitas Diponegoro

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Abstract

Dusun Thekelan, Desa Batur, Kecamatan Getasan, Kabupaten Semarang merupakan desa yang sebagian besar penduduknya mengandalkan perekonomian dari sektor pertanian. Namun pada pelaksanaan pertaniannya, dusun ini belum memanfaatkan hasil alam, dalam hal ini kotoran sapi, sebagai bahan dasar pupuk organik yang dipergunakan dalam pertaniannya sendiri maupun diperjualbelikan. Sehingga laporan pengabdian masyarakat ini bertujuan agar masyarakat Dusun Thekelan dapat membuat kompos berbahan kotoran sapi guna meningkatkan pertanian maupun perekonomian masyarakat. Metode pengabdian masyarakat yang dilakukan dengan tiga tahapan; tahap persiapan, tahap sosialisasi dan aplikasi, serta tahap akhir. Tahap persiapan dilakukan dengan pembuatan modul pengomposan. Tahap sosialisasi dilakukan dalam rapat warga dan sosialisasi khusus, serta pelatihan pembuatan kompos dari fermentasi menggunakan EM4 dan starbio pada kotoran sapi. Tahap akhir terdiri dari pembuatan laporan akhir. Hasil yang diharapkan adalah masyarakat Dusun Thekelan mampu membuat pupuk kompos padat berbahan dasar kotoran sapi yang dapat digunakan dalam pertanian, maupun dikomersilkan sehingga dapat meningkatkan perekonomian masyarakat.
Konsentrasi Anion Di Udara Ambien Dan Analisis Lintasan Balik Sumber Polutan Di Kota Semarang Haryono S Huboyo; Mochtar Hadiwidodo; Mochamad Nurihsan
Jurnal Serambi Engineering Vol 5, No 4 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i4.2322

Abstract

Air pollution in urban areas shows fluctuations in quality due to increasingly complex pollutant sources. This study aimed to determine the content of water soluble anions and sources of dust pollutants using the back trajectory method. Air quality dust was taken at the end of 2019 in Pedurungan District and Gunungpati District in Semarang City for 2 days with a dust measuring device at each sample point. From each sample, a laboratory test was carried out on its anion content. Anions were analyzed at the Diponegoro University Integrated Laboratory by ion chromatography. The dust concentration ranges from 60 - 90 µg/Nm3 with anion content below 25%. Some of the dominant anions are thought to come from industrial activities such as burning coal and densely populated areas in the city of Semarang. Based on the results of the trace back from the origin of the dust, it can be seen that the dust comes from the south area (Genuk area). Therefore, air pollution mitigation is directed to the South, where the potential comes from industrial activities and vehicles.
ANALISIS SERAPAN KEBISINGAN DENGAN PEMASANGAN ROCK WOOL KETEBALAN 5 CM Haryono S Huboyo; Mochtar Hadiwidodo; Suhardi Suhardi
TEKNIK Volume 34, Nomor 2, Tahun 2013
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (63.217 KB) | DOI: 10.14710/teknik.v34i2.5629

Abstract

The noise affects to working quality at the same degree as those to workforce and people health, therefore,appropriate noise control is indispensable. This study is aimed at evaluating of rockwool (5cm) absorptioncoefficient and analyzing its effectivity on noise control. The room for simulation is equipped with known noisesource. In this case a sound system instrument and portable fire pump were used. The tested noise frequencieswere in the range of human hearing threshold for which an equalizer instrument was used to identify the soundfrequencies.Based on this study, the rockwool absorption coefficients were 0.8, 0.96, 0.98, 0.82 for sound frequency of 500Hz, 1000 Hz, 2000 Hz and 4000 Hz respectively. By installing the rockwool on 37.97% of room area of 72 m2,this rockwool was able to reduce the noise intensity by 10.16 dBA, 10.75 dBA, 10.5 dBA, 9.58 dBA, 9.25 dBA forfrequency of 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz and multiple frequencies respectively.The rockwool is an effective sound absorber in noise control owing to have high absorption coefficient (almostunity) and ease for installment.
Co-Authors Alfiza Fahmi Anggi Ajie Permana Badrus Zaman Endro Sutrisno Evelyne Hanaseta Gunandjar Gunandjar Haryono S Huboyo Haryono S Huboyo Hasmaniar Septiani Irawan Wisnu Wardhana Ismaryanto Gunawan Lintang Tyas Perdana M. Arief Budihardjo Mochamad Nurihsan Nureka Yuliani Roland Ignasius Silalahi Suhardi Suhardi Wiharyanto Oktiawan Winardi Dwi Nugraha