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Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
Published by Universitas Diponegoro
ISSN : 1907817X     EISSN : 25500023     DOI : -
Arjuna Subject : -
Articles 356 Documents
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.
MODEL PERENCANAAN DAN PENGELOLAAN LINGKUNGAN BERBASIS MASYARAKAT KASUS : BENTANGLAHAN KAWASAN TEMBALANG SEMARANG Samadikun, Budi Prasetyo; Sudibyakto, Sudibyakto; Setiawan, Bakti; Rijanta, Rijanta
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 (153.577 KB) | DOI: 10.14710/presipitasi.v9i1.17-20

Abstract

One of mayor requirement in environmental system planning and management is to predict the condition  in  the  future.  Model  can  be  used  to  simplified  the  prediction  and  arrangement  of anything.  There  are  four  steps  as  a  guidance  for  making  a  model,  i.e.:  model  formulation, parameter identification, parameter estimation, and model validation. The result being expected after applying those four steps is a good model that consistent with study objective, simple, and applicable.
Prioritas Penentuan Peningkatan Kualitas Lingkungan Permukiman Kumuh yang Berkelanjutan Mutaqin, Zenal; Persada, Citra; Suroso, Erdi
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 16, No 2 (2019): Juli 2019
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (429.414 KB) | DOI: 10.14710/presipitasi.v16i2.65-75

Abstract

The enhancement of environmental quality for urban settlement in Palembang is expected to be sustainable due to the increase number of slum areas and the limited funding allocation for the infrastructure establishment. This study aimed to determine priority scale of activities and locations according to three pillars of sustainable development which can alleviate slum areas i.e. physical environment, social and economic aspects by involving all stakeholders. This research will provide information for the local government to determine priority activities and locations for settlement improvement by using Analytical Hierarchy Process (AHP). The study revealed that the main factor to improve the environmental quality for settlement in 29 Ilir sub-district was the infrastructure development with urgency level reaching 46.7%. Meanwhile, the urgency level of social activity factor was approximately 31.2% followed by the economic development factor which was the lowest level by 22.1%. However, the highest priority level from those activity factors was household waste management by 100%, while other priority activities that should be done consecutively were waste infrastructure (93.5%), community service activities (83,6%), environmental drainage (66.2%), sanitation (66.1%), business capital loans (63%), training and entrepreneurship (61%), and compensation for the poor (57,9 %). The aforementioned activities were conducted in priority locations in which environmental quality was relatively poor.
Detail Desain Sistem Penyediaan Air Bersih Menggunakan Sumber Mata Air (Studi Kasus DAS Citarik, Kecamatan Cimanggung, Kabupaten Sumedang Nugeraha, Winardi Dwi; Oktiawan, Wiharyanto
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 (3485.08 KB) | DOI: 10.14710/presipitasi.v4i1.85-91

Abstract

Water is one of the fundamental nedds of human being, but not everyone could easly access it. At kecamatan Cimanggung, Kabupaten Sumedang there are a few spring water that could be used, but there is no sufficient clean water supply system available. this has caused the people at the area found difficulties to obtain clean water.
Analisis Kuantitatif Sistem Manajemen Lingkungan Berdasarkan Klausul ISO 14001:2015 Ramadan, Bimastyaji Surya; Hapsari, Santika Budi; Pramesti, Ajeng Lhaksita; Ikhlas, Nurani
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 (347.66 KB) | DOI: 10.14710/presipitasi.v16i1.1-7

Abstract

PT. X merupakan perusahaan yang bergerak dalam bidang pengelolaan dan pengolahan limbah, sehingga sistem manajemen lingkungan yang baik dan benar sangat diperlukan dalam proses produksinya. Dokumen ISO 14001:2015 menjadi acuan PT. X dalam melakukan sistem manajemen lingkungan. Sertifikasi Sistem Manajemen Lingkungan ISO 14001 : 2015 merupakan bukti bahwa PT.X telah secara aktif melakukan audit eksternal maupun internal dalam bentuk self assessment dengan acuan yang ada pada klausul ISO 14001 : 2015. Pada penelitian ini dilakukan analisis secara kuantitatif menggunakan panduan self assesment yang dikeluarkan oleh Global Environmental Management Initiative (GEMI). Checklist ini berisikan daftar persyaratan yang mengacu pada standar ISO 14001:2015, dan ditulis dalam format pertanyaan baku beserta skoring kuantitatif. Dari hasil analisa yang telah dilakukan, PT. X telah memenuhi prinsip ISO 14001:2015 yang dapat dilihat dengan adanya Standard Operating Procedure (SOP) yang berisi tata cara operasi, proses produksi dan pemeliharaan lingkungan, serta terdokumentasikannya kebijakan dan komitmen manajemen puncak tentang sistem manajemen lingkungan. Kebijakan dan komitmen lingkungan merupakan prinsip utama yang menjadi dasar untuk diterapkannya sistem manajemen lingkungan.
PREDIKSI CURAH HUJAN KOTA SEMARANG DENGAN FEEDFORWARD NEURAL NETWORK MENGGUNAKAN ALGORITMA QUASI NEWTON BFGS DAN LEVENBERG-MARQUARDT Warsito, Budi; Sumiyati, Sri
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 (120.768 KB) | DOI: 10.14710/presipitasi.v3i2.46-52

Abstract

This paper study the rainfall prediction at Semarang City as time series data with Feed Forward Neural Network  (FFNN)  model.  The  learning  algorithm  that  be  used  are  the  Quasi  Newton BFGS and Levenberg-Marquardt algorithm. The input unit is determined based on the best of ARIMA model. The computation is done with use  Matlab 7.1 program with 1000 epoch, five unit of hidden layer, 100 replication  and use  input at lag  variabel  1,  12  and 13, respectively. The result shows that the prediction is good in relatively, where Quasi Newton BFGS algorithm result the Mean Square Error (MSE) that more accurate.
KAJIAN RIPJM BIDANG CIPTA KARYA DI KABUPATEN PEMALANG DALAM MEWUJUDKAN TARGET PENCAPAIAN MDGs BIDANG LINGKUNGAN Maryono, Maryono
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 (1193.794 KB) | DOI: 10.14710/presipitasi.v6i1.28-33

Abstract

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PEMANFAATAN HYDRILLA (Hydrilla verticillata) UNTUK MENURUNKAN LOGAM TEMBAGA (Cu) DALAM LIMBAH ELEKTROPLATING STUDI KASUS: INDUSTRI KERAJINAN PERAK KELURAHAN CITRAN, KOTAGEDE Sumiyati, Sri; Handayani, Dwi Siwi; Hartanto, Widya
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 (166.915 KB) | DOI: 10.14710/presipitasi.v6i2.23-26

Abstract

Silver handicraft industries released waste water which contained copper (Cu) with concentration of 4,628mg/l. Such concentration had exceeded the standard quality oh KepMenLH No 51 Year 1995. Waste water treatment to reduce Cu concentration was conducted by using hydrilla (Hydrilla verticillata). This experiment had a purpose to find out the efficiency of hydrilla weight and the optimum retention time to reducde Cu concentration. Experiment was conducted in batch system with 150 gr, 200 gr, and 250 gr hydrilla weight variances and 30 days retention time. Experiment design used was Completely Random Design (CRD) repeated twice. Waste water sample was 5 L for each topless with the total of 7 topless. Cu concentration analysis was performed on laboratory by examining some parts of the hydrilla sample once in 3 days, and the waste water was examined for the Cu concentration on the 30th day. The operation result showed the average of Cu concentration reduction at the control topless without any treatment was 3,782 mg/l, the average of the 250 gr hydrilla weight treatment was 0,862 mg/l. The averages of Cu reduction efficiency for each weight were : 150 gr = 54,49%; 200 gr = 70,43%; 250 gr = 81,37%. The optimum retention time is at the 15th day with 0,027 mg/l of Cu concentration reduction.  These results showed that the most efficient treatment was the hydrilla with the weight variance of 250 gr with 15 days retention time
PENGGUNAAN BIOCATALYS ELECTROLYSIS DALAM PENURUNAN KONSENTRASI TOTAL SUSPENDED SOLID (TSS) DAN CHEMICAL OXYGEN DEMAND (COD) LIMBAH DOMESTIK Oktiawan, Wiharyanto; Hadiwidodo, Mochtar; Purwono, Purwono
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 13, No 2 (2016): September 2016
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (225.443 KB) | DOI: 10.14710/presipitasi.v13i2.81-87

Abstract

Secara umum air limbah kegiatan rumah tangga (domestik) dibuang langsung menuju badan air seperti sungai dan danau. Pengolahan limbah cair secara biologis (aerob) sering menghasilkan lumpur dalam jumlah besar. Jumlah lumpur dapat dikurangi dengan pengolahan anaerob. Sistem bioelektrokimia merupakan salah satu terobosan teknologi yang memungkinkan untuk mengolah limbah sekaligus menghasilkan energi berupa gas metana. Penggunaan biocatalys electrolysis dapat mengatasi kelemahan proses anaerob secara konvensional dalam penurunan konsentrasi TSS dan COD limbah domestik salah satunya mampu menghasilkan gas H2 dari proses elektrolisis. Penambahan daya ekternal sebesar 6 volt mampu menyisihkan TSS sampai kadar 82 mg/l dari kadar semula 157 mg/l. Tegangan 12 volt mampu menurunkan kadar COD sampai 47,46 mg/l dari kadar awal 223 mg/l. Penyisihan TSS paling rendah pada waktu elektrolisis 15 menit dengan kadar 87 mg/l. Penambahan waktu elektrolisis sebanding dengan penurunan konsentrasi COD limbah domestik. Pada penelitian ini kualitas maupun kuantitas gas metana tidak diketahui secara jelas. Selain gas metan, produk fermentasi juga belum diketahui.
Kesetimbangan Energi dan Manfaat dalam Aplikasi Produksi Bersih di Sistem Pengolahan Limbah Cair Industri Nanas Kaleng Andarani, Pertiwi; Sari, Mega Mutiara; Siallagan, Afni
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 (79.771 KB) | DOI: 10.14710/presipitasi.v14i2.75-80

Abstract

Industri pengolahan buah umumnya memiliki kadar organik yang tinggi, Salah satunya adalah industri pengolahan nanas. PT Great Giant Pineapple, Lampung, (PT GGP) merupakan produsen nanas kaleng ekspor yang menghasilkan limbah yang berpotensi mencemari lingkungan apabila tidak dikelola dengan baik. Salah satu upaya pengelolaan lingkungan dan perbaikan berkelanjutan, PT GGP berupaya melaksanakan sistem produksi bersih. Produksi bersih merupakan suatu strategi pengelolaan lingkungan yang bersifat preventif dan terpadu yang perlu diterapkan secara terus menerus pada proses produksi dan daur hidup produk dengan tujuan megurangi resiko terhadap manusia dan lingkungan. Tujuan dari penelitian ini adalah untuk menganalisis kesetimbangan energi dan manfaat secara kuantitatif dalam penerapan sistem produksi bersih di sistem pengolahan limbah cair PT GGP. Kesetimbangan energi dianalisis dengan menggunakan indikator NER (Net Energy Ratio) dan NEP (Net Energy Production). Manfaat finansial dari penggunaan kembali sludge juga dievaluasi secara kuantitatif. Dalam produksi biogas jumlah energi input yang dibutuhkan sebesar 1,002 MJ/hari/m3 air limbah, menghasilkan jumlah energi output sebesar 108,587 MJ/hari/m3 air limbah. Sehingga Nilai NER = 108,37 dan NEP = 17,585 MJ/hari/m3 air limbah. Sementara itu, dengan pemanfaatan Sludge atas perusahaan memperoleh keuntungan sebesar Rp 3.326.687.65/hari dan pemanfaatan sludge bawah memperoleh keuntungan sebesar Rp 19.054.592 /hari pada tahun 2015.

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