Garuda - Garba Rujukan Digital

STUDI PENGARUH BULKING AGENTS PADA PROSES BIOREMEDIASI LUMPUR MINYAK Mochamad Arief Budihardjo
Purifikasi Vol 8 No 1 (2007): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v8.i1.114

Tujuan penelitian ini adalah untuk mengetahui kondisi media yang sesuai pada proses bioremediasi oil sludge, mengetahui besarnya efisiensi penyisihan Total Petroleum Hydrocarbons (TPH), dan mengetahui jenis bulking agents yang paling baik. Campuran bahan yang digunakan adalah tanah bersih, oil sludge, bulking agents, pupuk NPK, dan pupuk kandang. Kadar TPH awal yang digunakan sebesar 5,58%. Bulking agents yang digunakan adalah sekam padi, serbuk gergaji, dan rumput liar. Untuk variabel kontrol yang diukur adalah humidity, suhu, pH, dan nutrisi. Penelitian ini dibatasi hingga kadar TPH akhir maksimal 1%, sesuai dengan KepMenLH No 128/2003, yang mentoleransi kadar TPH maksimal 1%. Hasil penelitian menunjukkan rasio C/N/P yang menurun setelah 15 hari. Selain itu pH sebesar 5–9 telah memenuhi kriteria sebagai media yang sesuai bagi mikroba tanah (pH ideal 6-9). Suhu selama penelitian(15-450C) tergolong ideal bagi pertumbuhan bakteri. Kelembaban cenderung stabil antara 12-30%. Masing-masing windrow menunjukkan pola penurunan konsentrasi TPH yang tipikal. Kadar TPH pada akhir penelitian berbeda. Sedangkan efisiensi penyisihan TPH dengan menggunakan bulking agents sekam padi, rumput liar, dan serbuk gergaji masing-masing sebesar 76,85%, 87,05%, dan 79,43%. Windrow yang menunjukkan efisiensi penyisihan TPH terbesar dengan konsentrasi TPH akhir paling kecil, adalah windrow B, yaitu yang menggunakan bulking agents rumput liar.

Sebaran Residu Insektisida Parathion pada Lahan Pertanian Bawang Merah di Kecamatan Wanasari Kabupaten Brebes Indratin Indratin; Mochamad Arief Budihardjo; Muhammad Helmi
xxxx-xxxx
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Indratin I, Budihardjo MA, Helmi M. 2020. Distribution of parathion insecticide residue in shallot agriculture land in wanasari sub-district, Brebes regency. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang 20 Oktober 2020. pp. xx. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).The use of pesticides in agricultural land tends to be excessive because farmers think that pesticides can increase yields. It can also pollute the environment. Many farmers often use organophosphate insecticides as the efforts in controlling the pests of shallot plant organisms, one of which is Parathion. The use of Parathion has been banned by the Indonesian government since 2015 for agriculture. This research aims to determine the distribution of Parathion residue in the lower red agricultural land in Wanasari sub-district, Brebes Regency. The research was carried out in March - July 2020 in Wanasari sub-district. Soil samples were taken to the Integrated Laboratory of the Indonesian Agricultural Environment Research Institute to be analyzed the residual content of Parathion by using the QueCheRS method. The mapping of the residue distribution method used ArcGIS 10.4 with the Spline interpolation method. The results of laboratory analysis identified the residual content of Parathion between <LoD : 0.0025 mg kg-1 to 0.0956 mg kg-1. The residual content of the Parathion which was identified to exceed the LoD value was spread over 17 soil sampling points, all identified below the MRLs value. The identified land area in the very low category was 806.08 ha and identified as low was 1,563.81 ha. The distribution of parathion residues in shallot agricultural land in Wanasari sub-district was identified in the very low and low categories, this needs to be watched out for because it is possible for the farmers to still use parathion type insecticides in shallot cultivation.

RISK ANALYSIS STUDY OF NOx, and SOx FROM TRANSPORTATION (CASE STUDY: MAIN STREETS OF D.I. JOGJAKARTA) Mochamad Arief Budihardjo
TEKNIK Vol 28, No 1 (2007)
Publisher : Diponegoro University

The air pollution problems have been progressively set attention to the world especially industrialcountries recently. These problems not only give affect at health like emphysema, bronchitis, and otherinhalation disease but also make plants and properties destruction causes very big loss. This research isconcerned with the risk level which is accepted by people who reside in roadside because most of airpollutants come from transportation facilities such as motor vehicle. The limitation of the research is airpollutants exposure such like NOx, and SOx which enter the body through respiration. This risk analysisresearch is broken down into four step as follow; hazard identification showing NO2, and SO2concentration in 15 sampling locations where the highest value of NO2 is 56,5 μg / m3 and SO2 is 28,87μg/m3. According to DIY Governor Regulation No. 153 Year 2002 about the value of ambient air qualitystandard, quality standard of NO2 is 400 μg / m3, and SO2 is 900 μg / m3. It can be concluded thatconcentration of NO2 and SO2 in 2005 within all sampling locations is still under of quality standard. Thestep of exposure assessment involves the exposed population including pedicab worker, park worker, andcloister merchant. From calculation, the intake range of NO2 enters the body is 0,0025-0,0075 mg/kg.dayand SO2 is 0,0008-0,0038 mg/kg.day. Third step is dose-response assessment to find out what will be facedby people if exposure of pollutants occurs in a certain dose. The last step is risk characterization, theresult of research is that risk value / Hazard Index (HI) less than 1 that still acceptable. It can besummarized that the ambient air quality of Jogjakarta especially NO2 and SO2 gas do not too adverse tohealth.

RISK ANALYSIS STUDY OF NOx, and SOx FROM TRANSPORTATION (CASE STUDY: MAIN STREETS OF D.I. JOGJAKARTA) Mochamad Arief Budihardjo
TEKNIK Vol 28, No 1 (2007)
Publisher : Diponegoro University

The air pollution problems have been progressively set attention to the world especially industrialcountries recently. These problems not only give affect at health like emphysema, bronchitis, and otherinhalation disease but also make plants and properties destruction causes very big loss. This research isconcerned with the risk level which is accepted by people who reside in roadside because most of airpollutants come from transportation facilities such as motor vehicle. The limitation of the research is airpollutants exposure such like NOx, and SOx which enter the body through respiration. This risk analysisresearch is broken down into four step as follow; hazard identification showing NO2, and SO2concentration in 15 sampling locations where the highest value of NO2 is 56,5 μg / m3 and SO2 is 28,87μg/m3. According to DIY Governor Regulation No. 153 Year 2002 about the value of ambient air qualitystandard, quality standard of NO2 is 400 μg / m3, and SO2 is 900 μg / m3. It can be concluded thatconcentration of NO2 and SO2 in 2005 within all sampling locations is still under of quality standard. Thestep of exposure assessment involves the exposed population including pedicab worker, park worker, andcloister merchant. From calculation, the intake range of NO2 enters the body is 0,0025-0,0075 mg/kg.dayand SO2 is 0,0008-0,0038 mg/kg.day. Third step is dose-response assessment to find out what will be facedby people if exposure of pollutants occurs in a certain dose. The last step is risk characterization, theresult of research is that risk value / Hazard Index (HI) less than 1 that still acceptable. It can besummarized that the ambient air quality of Jogjakarta especially NO2 and SO2 gas do not too adverse tohealth.

STUDI PEMBENTUKAN ZONE JARINGAN PIPA DISTRIBUSI AIR MINUM KOTA SEMARANG (Wilayah pelayanan PDAM SEMARANG UTARA ) Nasrullah Nasrullah,; Mochamad Arief Budihardjo
TEKNIK Vol 28, No 1 (2007)
Publisher : Diponegoro University

Semarang City’s drinking water distribution system in the North Semarang uses an interconnectionnetwork system. This causes difficulty in optimizing the network distribution supply and controlling thewater leakage. Semarang City’s drinking water provider is planning to divide the area in to 25 zones. Thisstudy purpose to plan one of the zone areas, which is zone 1. The existing condition on zone 1 shows thatthe water source is from Siranda distribution reservoir. The water flows by the gravitation. The distributionpressure on the pipe network is not even. Pressure drop between 3 to 7 m water columns at the peakcondition on the end of the furthest point in the network. The strategy in planning the network is by cuttingthe interconnection pipe, providing new pipes, closing the existing valves, adding new valves for isolatedareas, adding primary water meter and sub zone water meter and moving the interconnection pipes. Then,the distribution system is analyzed using Epanet 2.0 program that can show the effort of the changes after.The system shows that there is no more pressure drop on the area. The pressures are between 11-16 meterwater column and the water flow in the pipes are more alike, between 0,3 to 3 m/s. The PDAM can observethe distribution and the water leak more easily by using this system.

Title

Found 5 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 5 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 5 Documents
Search