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INDONESIA
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
Published by Universitas Diponegoro
ISSN : 1907817X     EISSN : 25500023     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences
Arjuna Subject : -
Articles 600 Documents
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Evapotranspiration of Indonesia Tropical Area Marganingrum, Dyah; Santoso, Heru
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 16, No 3 (2019): November 2019
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.261 KB) | DOI: 10.14710/presipitasi.v16i3.106-116

Abstract

Indonesia is an archipelago country with a tropical climate. The region of Indonesia is quite large and located between two continents (Asia and Australia) and between two oceans (Indian and Pacific), making the territory of Indonesia has a unique climate pattern. One of the climate variables that quite important to be studied in this chapter is evapotranspiration. The Thornthwaite method was used to estimate potential evapotranspiration based on average air temperature. The relationships between evapotranspiration, precipitation, and elevation were then examined. Besides, temperature variations that affect climate patterns between monsoonal and equatorial regions were compared, between the mainland and small islands, and between mountain and coastal area. The impact of global warming was also examined on the climate and potential evapotranspiration of the Indonesian region. Data analysis showed that evapotranspiration correlates weakly with precipitation, and the contrary, the evapotranspiration correlates strongly with elevation, with correlation indices of 0.02 and 0.89, respectively. The study confirmed that air temperature is the primary controlling variable of the evapotranspiration in this very heterogeneous landscape. Under a global temperature increase of 1.5 °C above the pre-industrialized year (1765), the evapotranspiration is expected to increase in a range from 4.8 to 11.1%. In general, the excess of water to restore soil moisture in the future tends to decrease, i.e., drier.
POLA PENYEBARAN GAS NO 2 DI UDARA AMBIEN KAWASAN UTARA KOTA SEMARANG PADA MUSIM KEMARAU MENGGUNAKAN PROGRAM ISCST3 Hadiwododo, Mochtar; Huboyo, Haryono Setiyo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 1, No 1 (2006): Vol 1, No 1 (2006)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (239.35 KB) | DOI: 10.14710/presipitasi.v1i1.19-24

Abstract

North  district  of  Semarang  City  is  an  area  characterized  by  dense  population, congested transportation, and high  industry activities.  Urban activities in this area are predicted produce enourmous pollutant  one  of  them is  NO 2 .    This  gas  is  hazardous  for  human  health, and can cause death even that concentration exceed standard level 150 µgr/m3.  Inventory emission is used to identify sources that produce NO 2  gas and quatify the concentration.  ISCST3 program was used as a tool to recapitulate the dispersion  of NO 2  gas in ambient from it sources to the potent receptor. Combinated with  Surfer program, it result were easily be visualized trough NOx isopleth  contour  overlaid  to  land used  map.  The  result  of  this  observation  showed  that  total emission  of  NO 2   gas  in  area observation  is  0,001445  ton/year  where  is  transportation contributes 91,68 %, followed by industry 8,31 %, and domestic 0,01 %.  Dispersion pattern of NO 2   gas  in  ambient  is  mainly  affected  by calm  condition  of  wind  making  NO 2   gas  is concentrated in 3 regions i.e Pindrikan Kidul, Peterongan, and Tambakrejo.
ANALISIS HUBUNGAN KEBISINGAN MESIN DENGAN STRES KERJA (Studi Kasus : Mesin TWO FOR ONE TWISTER (TFO) PT. XYZ) Budiawan, Wiwik; Ulfa, Ema Amalia; Andarani, Pertiwi
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 13, No 1 (2016): Maret 2016
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (656.438 KB) | DOI: 10.14710/presipitasi.v13i1.1-7

Abstract

The Two for One Twister (TFO) machine emits very disturbing noise and the noise exposes the workers while performing their tasks. The noise also lead to works stress. So, it is necessary to determine the relationship between the noise and work stress of TFO machine operators. This study  was  conducted  by measuring  the  noise  of  TFO  engine  with  Enviro-meter  and then correlating the noise and work stress with SPSS 16 software. Spearman correlation test results showed that a strong correlation between noise with work stress (p value = 0.042). In order to reduce the noise level that will decrease stress for workers, Fault Tree Analysis was conducted to determine the source of the noise. Based on the qualitative analysis of FTA, the causes of the noise were as follows: the lubricating oil was not applied, seal of oil valve leaked, bearing was not replaced (2 years economic life), the traveler was not replaced (10 days economic life), and the Doubling machine was troubled. Based on the quantitative analysis of the probability of job stress of TFO machine operator due to noise TFO machines from a known probability of 0.041, hence, the system was feasible for use.
PEMANFAATAN LUMPUR AKTIF DAN EM4 SEBAGAI AKTIVATOR DALAM PROSES PENGOMPOSAN LIMBAH KULIT BAWANG DENGAN SLUDGE Samudro, Ganjar; Syafrudin, Syafrudin; Sujiwo, Bagus
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 9, No 2 (2012): Vol 9, No 2 (2012)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (921.387 KB) | DOI: 10.14710/presipitasi.v9i2.51-63

Abstract

Pengolahan air limbah PT. Indofood CBP menghasilkan sludge yang belum terolah dengan baik. PT. Indofood membutuhkan suatu teknik pengolahan sludge sebagai wujud komitmennya terhadap lingkungan. Tujuan penelitian ini adalah untuk mengetahui kondisi optimum pengomposan aerobik sludge dan kulit bawang. Kulit bawang yang digunakan adalah, yaitu kulit bawang dari divisi pengupasan bawang PT. Indofood CBP. Pada penelitian ini dilakukan analisis terhadap kandungan C-Organik, N-Total, P-Total, K-Total, C/N rasio, dan kadar air pada kompos tiap lima hari sekali. Hasil penelitian didapatkan C/N rasio aktivator EM4 adalah variasi A1 (2,5 kg sludge + 2,5 kg kulit bawang) sebesar  19,74%, B1 (3,3 kg sludge + 1,7 kg kulit bawang) sebesar 18,61% dan C1 (4,2 kg sludge + 0,8 kg kulit bawang) sebesar 14, 17%. Sedangkan C/N rasio aktivator lumpur aktif adalah variasi A2 (2,5 kg sludge + 2,5 kg kulit bawang) sebesar 19,81%, B2 (3,3 kg sludge + 1,7 kg kulit bawang) sebesar 19,00%, dan C2 (4,2 kg sludge + 0,8 kg kulit bawang) sebesar 14, 76%. Hal ini menunjukkan bahwa semakin banyak penambahan lumpur, semakin baik C/N rasio kompos.
Pengaruh Pendampingan Masyarakat dalam Pemilahan Sampah di Desa Pucung Kecamatan Tirto Kabupaten Pekalongan Samadikun, Budi Prasetyo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 15, No 1 (2018): Maret 2018
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1462.413 KB) | DOI: 10.14710/presipitasi.v15i1.46-52

Abstract

Potential problems in household waste management are still found, especially in residential areas. Pucung Village, Tirto District Pekalongan Regency with a population of 3.347 people, is one example of a village that has not implemented waste management properly. The availability of inadequate trash can be one of the factors that causes the waste has not been well managed in this village. This community assistance activity aims to educate and encourage the community to be self-sufficient in waste management, especially in waste sorting. According to the recommendations of Pucung Village Government, this community assistance activity is centered in RT 04 RW 01 area as an embryo or pilot project to be implemented in all Pucung Village area. The methods used are survey, socialization, simulation, and post-socialization follow-up. The residents are quite enthusiastic and appreciative towards this activity, shown by the attendance rate of more than 60% during socialization and conducive discussion. The results of post-socialization evaluation indicate that people have started to realize in managing waste, indicated by the separated garbage in a different trash can at their residenceKeywords: accompaniment, sorting, waste, Pucung
EFEKTIFITAS PENURUNAN Fe 2+ DENGAN UNIT SARINGAN PASIR CEPAT MEDIA PASIR AKTIF Oktiawan, Wiharyanto; Krisbiantoro, Krisbiantoro
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 2, No 1 (2007): Vol 2, No 1 (2007)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.584 KB) | DOI: 10.14710/presipitasi.v2i1.56-59

Abstract

The process that happened in decreasing Fe2+ with a rapid sand filter are mechanical straining, sedimentation, adsorbs and an activities of chemical in the water it self. This research uses 2 stages in testing; they are the batch filter and the column filter. On each of the stages we try using activated sand media. This media is known to able to decrease the Fe2+. The water spring is from the 2nd deep well at the Prambanan water treatment facility. The goal from this research is to find the criteria design on surface loading and to find out the effectiveness in reducing Fe2+ that is in the water by using the media of activated sand. From this experiment we found that the maximal filtration speed on activated sand is 12, 85 m/jam. Calculation analysis shows that the removal  coefficient  of  Fe2+  in  the  batch activated  sand  filter  is  λ 1   =  0,92  ±  0,16  m-1  with  the average on reducing Fe2+ 42,27%.
STUDI PEMILIHAN CALON LOKASI TEMPAT PEMBUANGAN AKHIR SAMPAH KABUPATEN PEMALANG Hardyanti, Nurandani; Syafrudin, Syafrudin
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 4, No 1 (2008): Vol 4, No 1 (2008)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.87 KB) | DOI: 10.14710/presipitasi.v4i1.37-42

Abstract

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PENYISIHAN NIKEL MENGGUNAKAN MEDIA ZEOLIT (STUDI KASUS LIMBAH INDSUTRI KECIL PELAPISAN LOGAM KECAMATAN JUWANA PATI) Syafrudin, Syafrudin
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 5, No 2 (2008): Vol 5, No 2 (2008)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1284.076 KB) | DOI: 10.14710/presipitasi.v5i2.49-54

Abstract

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PERKEMBANGAN BIOFILM NITRIFIKASI DI FIXED BED REACTOR PADA SALINITAS TINGGI Sudarno, Sudarno
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 9, No 1 (2012): Vol 9, No 1 (2012)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (289.084 KB) | DOI: 10.14710/presipitasi.v9i1.1-9

Abstract

Development of nitrification biomass that is growing attached on carried material was examined by measuring its ammonium or nitrit oxidation rates. Porous ceramic rings (36 pieces) were put into the fixed bed reactor (FBR ). The fixed bed reactor  that was operated continuously for more than 500 day was continued to be operated at a HRT of 1 day, a DO of above 5 mg L-1 and pH of 8. Ammonia concentration in the feeding was 50 mg NH4+-N L-1.  At days 1, 5, 12, 20, 33 and 50, six porous ceramic rings were taken out and then ammonia and nitrite removal rate by biofilm in the ceramic rings was separately measured. The measurement of rates was done in small cylindrical glass reactors with initial concentration of ammonia and nitrite was 10 mg N L-1. Until 50 days of incubation AORs were always higher than NORs. Additionally, ammonia oxidizers attach or grow faster in the porous ceramic material than nitrite oxidizers. Keywords: saline wastewater, Ammonium Oxidizing Bacteria, Nitrit Oxidizing Bacteria, biofilm
Revitalisasi Pengelolaan Bank Sampah Di Palabuhanratu Samadikun, Budi Prasetyo; Handayani, Dwi Siwi; Laksana, Muhamad Permana
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 14, No 2 (2017): September 2017
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.116 KB) | DOI: 10.14710/presipitasi.v14i2.68-74

Abstract

Bank sampah di Kelurahan Palabuhanratu sudah berdiri sejak tahun 2010. Bank sampah ini adalah salah satu bank sampah diantara dua bank sampah lain, yang baru berdiri pada tahun  2016. Volume sampah pada tahun 2015 sebesar 134,89 m3 per hari, mencakup 89% wilayah Kelurahan Palabuhanratu ternyata masih belum optimal dalam pengolahannya, karena  sampah yang direduksi masih sekitar 5% dari total timbulan sampah yang dikirim ke TPA Cimenteng yang berlokasi sekitar 70 km dari Kelurahan Palabuhanratu. Kinerja bank sampah eksisting masih kurang, karena satu bank sampah hanya mampu melayani satu RW dan belum dapat melayani satu kelurahan. Selain itu, pengolahan sampah organik untuk dijadikan kompos belum dilakukan secara serentak oleh seluruh masyarakat, karena pengetahuan masyarakat yang masih kurang. Tujuan penelitian adalah mengetahui kondisi eksisting pengelolaan sampah dan merumuskan upaya revitalisasi Bank Sampah eksisting sebagai pihak pendukung pengelolaan sampah di TPS Kelurahan Palabuhanratu. Metode penelitian menggunakan metode survei, dengan menggunakan kuesioner, wawancara mendalam, dan observasi. Teknik analisis menggunakan analisis kuantitatif dan analisis kualitatif. Hasil penelitian menunjukkan bahwa masyarakat yang melakukan pemilahan sampah dari sumber hanya penduduk RT 01 RW 33. Selain itu jumlah TPS di Kelurahan Palabuhanratu masih terbatas, sehingga membutuhkan tambahan 5 unit TPS yang terintegrasi dengan bank sampah di kelurahan ini.Kata kunci: revitalisasi, bank sampah, PalabuhanratuThe  waste bank in Palabuhanratu Village  has been established since 2010. This waste bank is one of the waste bank among two other waste banks, newly established in 2016. The volume of waste in 2015 is 134,89 m3 per day, covering 89% of Palabuhanratu Village area  is still not optimal in its processing, because the reduced waste is still about 5% of the total waste generation delivered to the Cimenteng Final Diposal Site (FDS), which located about 70 km from Palabuhanratu Village. The existing waste bank’s performance is still very poor, because one waste bank can only serve one RW and can not serve the entire village. In addition, the processing of organic waste to be compost has not been done simultaneously by the whole community, due to the lack of people's knowledge. The purpose of this research is to know the existing condition of waste management and to formulate the revitalization of existing waste bank. The research used survey research method by using questionaire, in depth interview, and observation. Analytical technique using quantitative and qualitative analysis. The findings shows that the residents of Palabuhanratu Village who often do waste sorting from the source only from the residents of RT 01 RW 33. In addition, the number of existing temporary disposal site (TDS) in Palabuhanratu Village is still lacking, so it requires addition up to 5 units that integrated with waste bank in this village.Keywords: revitalization; waste bank, Palabuhanratu

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