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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 573 Documents
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IDENTIFIKASI KELAS AIR DAN PENENTUAN DAYA TAMPUNG BEBAN CEMARAN BOD SUNGAI DENGAN MODEL QUAL2E (STUDI KASUS SUNGAI SERAYU, JAWA TENGAH) Nugraha, Winardi Dwi
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 (2165.775 KB) | DOI: 10.14710/presipitasi.v5i2.31-41

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KOMBINASI FEEDING BIOSTARTER DAN AIR DALAM ANAEROBIK DIGESTER Budihardjo, Mochamad Arief
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 6, No 2 (2009): Vol 6, No 2 (2009)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.902 KB) | DOI: 10.14710/presipitasi.v6i2.27-34

Abstract

The research was conducted to investigate how much biostarter and water adding influence to biogas which is produced from organic waste degradation process of market and restaurant organic waste by anaerobic process. In this research, biostarter acts as catalyst to quicken organic waste degradation process while water addition function as moisturizer substrates factor in digester. Contribution of biostarter and water combination addition, be able to yield a lot of biogas which contains methane gas is significant. Research was set as laboratory scale experiment using batch system with fifth variations of treatment observed. The variations aim to determine a most effective variation which has capabilities to yield a lot of volume biogas, methane gas and the high efficiency of quality slurry reduction on a brief HRT (Hydraulic Retention Time). The result of the  research indicates that methane gas percentage in biogas at every variant range from 21.89 - 30.78 %, acid substrate level 5.47 - 7.41, which still at a preferable range for bacteria to live and efficiency of slurry quality reduction at every variant especially at its organic content range from 15.29 - 93.92 %
Potensi Chlorella Sp. untuk Menyisihkan COD dan Nitrat dalam Limbah Cair Tahu Istirokhatun, Titik; Aulia, Mustika; Utomo, Sudarno
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 (188.145 KB) | DOI: 10.14710/presipitasi.v14i2.88-96

Abstract

In order to examine the potential use of tofu-processing wastewater as growth media for microalgae, this research was conducted by cultivating microalgae in varying concentrations. The type of microalga selected in the experiment was Chlorella sp. due to its high reproductive rate. The ability of Chlorella sp. in removing the levels of COD and nitrate contained in the tofu liquid waste were also investigated. This study examined the microalgae growth rate, microalgae cell abundance values, reduced organic levels of COD and nitrate of Chlorella sp which cultivated in tofu wastewater medium. The optimum growth of Chlorella sp was found at 30% v/v of tofu wastewater which reduce COD and nitrate up to 77.40% and 30.03% respectively. From this study, we concluded that tofu-processing wastewater is effective to use as microalgae growth media and at the same time, effective to eliminate COD and nitrate.
PENGARUH KEPADATAN KENDARAAN BERMOTOR DAN ANGIN TERHADAP KONSENTRASI TIMBAL (Pb) PADA DAUN ANGSANA (Pterocarpus indicus) DAN MAHONI (Swietenia macrophylia) DI MUSIM KEMARAU Huboyo, Haryono Setiyo; Sumiyati, Sri
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 6, No 1 (2009): Vol 6, No 1 (2009)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1001.551 KB) | DOI: 10.14710/presipitasi.v6i1.1-5

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Pengaruh Penambahan Gula Pasir Terhadap Kualitas Makanan Kelinci dari Limbah Sayuran Pasar dengan Teknologi Fermentasi Sutrisno, Endro; Hadiwidodo, Mochtar; Handayani, Dwi Siwi; Wardhana, Irawan Wisnu; Sabrina, Azzura
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 16, No 1 (2019): Maret 2019
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.649 KB) | DOI: 10.14710/presipitasi.v16i1.16-23

Abstract

Sampah merupakan masalah yang paling umum ditemui di Indonesia.  Peningkatan jumlah penduduk di Indonesia yang semakin meningkat menyebabkan meningkatnya jumlah sampah yang dihasilkan dan berdampak buruk bagi lingkungan. Berkembangnya Kota Semarang mengakibatkan jumlah penduduk di Kota Semarang meningkat disertai dengan peningkatan konsumsi masyarakat. Masyarakat di Kota Semarang dalam memenuhi kebutuhan konsumsi harian salah satunya dilakukan di pasar. Dengan meningkatnya tingkat konsumsi masyarakat di pasar mengakibatkan jumlah limbah padat organik pasar-pasar di Kota Semarang khususnya limbah sayuran ikut meningkat. Pemanfaatan limbah sayuran pasar biasanya dijadikan pupuk. Selain dimanfaatkan menjadi pupuk, limbah sayuran pasar dapat juga dijadikan pakan ternak yaitu pakan kelinci. Jika diolah menjadi pakan kelinci, sampah tersebut tidak hanya menjadi sebuah produk saja tetapi dari hasil pakan yang dikonsumsi oleh kelinci tersebut menghasilkan daging dengan kualitas yang baik serta menghasilkan pupuk organik hasil dari kotoran kelinci. Pemanfaatan limbah sayuran pasar ini dilakukan dengan pengolahan limbah sayuran pasar menjadi pakan kelinci dengan penambahan gula pasir sebagai sumber energi. Pengolahan limbah sayuran pasar menjadi pakan kelinci dilakukan dengan teknologi fermentasi. Proses fermentasi dilakukan selama 7 hari.  
UJI PEMBUATAN BIOGAS DARI KOTORAN GAJAH DENGAN VARIASI PENAMBAHAN URINE GAJAH DAN AIR Hardyanti, Nurandani; Sutrisno, Endro
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 3, No 2 (2007): Vol 3, No 2 (2007)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (82.472 KB) | DOI: 10.14710/presipitasi.v3i2.73-77

Abstract

Biogas was a gas produced from biological activities in anaerobic fermentation processes and as  a renewable  energy.  This  research  was  to  find  out  the  effect  between  elephant  manure, elephant urine, water and starter to reduce biogas production and calorie value. This research is divided  into  three groups  based  on  the  raw  material,  i.e.,  elephant  manure,  elephant  urine, water  and  starter  as independent  variabels.  Observation  is  consisted  of  biogas  production volume and calorie value. This result showed that in 21 days, elephant manure mixtured with elephant urine with ratios of 1:2  was the best material to produce biogas, that was 60,800 ml of biogas and 5345.39 cal/liters of calorie value.
Kajian Kualitas Perairan Laut Sekitar Muara Sungai Jelitik Kecamatan Sungailiat – Kabupaten Bangka Wibowo, Mardi; Rachman, Reno Arief
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 1 (2020): Maret 2020
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.523 KB) | DOI: 10.14710/presipitasi.v17i1.29-37

Abstract

Jelitik River is the main river and economic artery of Sungailiat District, Bangka Regency. Currently around the Jelitik River there is a Jelitik Fishing Port and is developed as an industrial area. In addition to the problems of sedimentation problems with the development of industrial estates and the presence of sand mining rich in tin ore on land and on the high seas it is feared that it will reduce the quality of the environment, especially the surrounding sea water. Therefore, this study is needed in order to find out the quality of waters in this estuary which can be used as a basis or baseline for the initial environment of this region if later this area will be developed as a port or industrial area. The method used in this study is field observation, water sampling, and laboratory analysis. Therefore, as an initial step, it is necessary to identify the quality of the waters in this estuary which can be used as the basis or initial environmental baseline of this area if later this area will be developed as a port or industrial area. Based on observations in the field of laboratory analysis of water samples, generally the quality of seawater around the estuary of Jelitik River still meets seawater quality standards both for port activities, marine tourism and for biota. Some parameters that exceed the quality standard include total suspended solid (TSS) which reaches 250 mg/l, total dissolved solids (TDS) which reaches 24,700 mg/l and nitrate content which reaches 0.38 mg/l. BOD value is 4.7 mg / l and COD is 46.4 mg / l, these parameters are still below the existing sea water quality standard.
PENENTUAN FAKTOR EMISI TOTAL SUSPENDED PARTICULATE (TSP) DARI PEMBAKARAN SAMPAH DOMESTIK SECARA TERBUKA DI KELURAHAN TEMBALANG METESEH DAN BULUSAN KECAMATAN TEMBALANG - SEMARANG Sutrisno, Endro; Wardhana, Irawan Wisnu
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 6, No 1 (2009): Vol 6, No 1 (2009)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (816.871 KB) | DOI: 10.14710/presipitasi.v6i1.47-51

Abstract

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INTERAKSI PELAKU DAUR ULANG SAMPAH MELALUI UJI REGRESI LINEAR DI KELURAHAN PANGGUNG LOR, KUNINGAN DAN BANDAR HARJO KOTA SEMARANG Maryono, Maryono; Andriyani, Riki
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 7, No 1 (2010): Vol 7, No 1 (2010)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (529.344 KB) | DOI: 10.14710/presipitasi.v7i1.1-12

Abstract

Recycling  process  and  activities  are  part  of  the  solid  waste  management.  Informal  Actor  such  as Scavengers,  Small  Middleman  and  Big  Middleman  has  a  unique  networking.  The  interaction  can beclassified  as node, subpoint and centerpoint. They has a relationships which representation of solid waste  transport  among  area  and  region.  Based  on  Sejati  research  (2009),  the  networking  and relationships among the informal actor of Recycling process like can be astimated as a mathematic model. Regrestion analysis was running to test the mathematic model. Panggung Lor, Bandarharjo and  Kuningan,  at  Semarang  was  chosen  as  location  study  because  of  the  characteristic  of  the Recycling activities. 
KARAKTERISTIK BRIKET DARI KOMPOSIT SAMPAH BUAH, SAMPAH PLASTIK HIGH DENSITY POLYETHYLENE (HDPE) DAN TEMPURUNG KELAPA SEBAGAI BAHAN BAKAR ALTERNATIF DI RUMAH TANGGA Ruslinda, Yenni; Husna, Fitratul; Nabila, Arum
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 14, No 1 (2017): Maret 2017
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.697 KB) | DOI: 10.14710/presipitasi.v14i1.5-14

Abstract

This study aims to examine the characteristics of briquettes from fruit waste, HDPE plastic waste, and coconut shell composite, as an alternative fuel. Characteristic tests include physical characteristics (density and compressive strength), chemical characteristics (moisture, volatile content, fixed carbon, ash content, calorific value), and cost calculation for making briquettes. Physical characteristics tests obtained that density is between 0.60 to 0.89 g/cm3 and compressive strength is between 0.88 to 6.87 kg/cm2. Chemical characteristics tests found that water content 5.73 - 9.06%; volatile content 70.02 - 79.92%; fixed carbon 12.39 - 18.41%; ash content of 1.47 - 4.86%, and calorific value 4549 - 7213 cal/g. Cost for making briquettes range between 0.56 to 0.86 rupiahs/kcal. Except for compressive strength parameter, other parameters are in the standard range of biobriquettes quality according to Permen ESDM No. 047 Tahun 2006. Optimum briquette found in this research is a mixture of 20% fruit waste, 20% of plastic waste HDPE, and 60% coconut shell. Briquettes made as a mixture of those three raw material with that composition is optimum as an alternative fuel, because it produces higher calorific value and lower cost. 

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