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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 555 Documents
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UNJUK KERJA MODIFIKASI SBR AEROB TERHADAP PENYISIHAN COD Junaidi, Junaidi
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 (85.574 KB) | DOI: 10.14710/presipitasi.v2i1.60-65

Abstract

Sequencing  Batch  Reactor  (SBR)  is  a  modification  process  from  activated  sludge  that has flexibility in its implementation. In aerobic SBR, all phase is in aerobic cycles those are filling phase, reaction  phase,  settling  phase,  drawing  phase  and  idle  phase.  In  this  research,  idle phase  is modified  as  stabilize  phase  where  biomass  is  aerated  for  finite  time  so  sorption capacity    of biomass  back  to  normal  This  research  shows  that  optimum  COD  removal  is achieved  in  one  hour reaction  time  and  stabilization  time  is  6  which  is  97,02  %  using  active carbon and  95,23 % without active carbon. In conclusion, COD removal capabilities with GAC is better than without GAC.
DESAIN SISTEM PENYALURAN DAN PENGOLAHAN AIR LIMBAH DOMESTIK DENGAN KOMBINASI TEKNOLOGI UP FLOW ANAEROBIC SLUDGE BLANKET DAN DOWN FLOW HANGING SPONGE PERUM PERUMNAS BOGOR UTARA KOTA BOGOR Nasrullah Nasrullah
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 (202.597 KB) | DOI: 10.14710/presipitasi.v4i1.43-47

Abstract

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ANALISA PENGARUH PERBEDAAN FUNGSI TATA GUNA LAHAN TERHADAP BEBAN CEMARAN BOD SUNGAI (STUDI KASUS: SUNGAI SERAYU - JAWA TENGAH) Priyambada, Ika Bagus; Oktiawan, wiharyanto; Suprapto, Ratih Puspa Endah
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 (1847.07 KB) | DOI: 10.14710/presipitasi.v5i2.55-62

Abstract

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KETAHANAN GELAS-LIMBAH AKTIVITAS TINGGI HASIL VITRIFIKASI MENGGUNAKAN BOTTOM ASH SEBAGAI GLASSFRITS Budiarti, Ratna; Purwanto, Purwanto; Martono, Herlan
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 (582.052 KB) | DOI: 10.14710/presipitasi.v9i1.20-30

Abstract

Vitrification is considered  as the most appropriate technology for HLW treatment.  However, it has constraints, those are processability, economic, and durability. The purposes of  this study are to examine the composition of materials using bottom ash  as an alternative glassfrits for vitrification, to assess waste glass durability of selected glassfrits and analyze the economic advantage of bottom ash utilization as glassfrits. This research was conducted with simulated High Level Waste. Glass–waste was melted at its melting point. Glasses  used in the study were borosilicate glass, bottom ash glass, and bottom ash glass added  B2O3.  Parameters  used  for  selected  glassfrits  are  melting  temperature,  leaching  ratecompressive strength and cost analysis. Selected glassfrits was analyzed using XRD and performed tests to determine the effect of pH on leaching rate. The results indicated that the addition of B2O3 in glass bottom ash reduced the melting temperature. This glass has a density of 2.78 g/cm3 , leaching rate of 6.99 x 10-7. Utilization of  bottom ash as a glassfrits can save 75, 34% of cost. The results of XRD analysis explained that the devitrification formed  a crystalline of Ca-Fe-Al-S-Si-O, Fe+2Fe2 O4+3, Ca-Mg-Fe-Ti-AlSiO. the influence of pH on the leaching rate showed that the highest leaching rate was at acidic condition Keywords: vitrification, chemical durability, mechanical durability, bottom ash
Cryptosporidium sebagai Indikator Biologi dan Indeks Nsf-Wqi untuk Mengevaluasi Kualitas Air (Studi Kasus: Hulu Sungai Citarum, Kabupaten Bandung) Nufutomo, Tastaptyani Kurnia; Muntalif, Barti Setiani
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 (16.519 KB) | DOI: 10.14710/presipitasi.v14i2.45-53

Abstract

Kualitas air yang menurun di Hulu Sungai Citarum dapat disebabkan oleh banyak faktor. Faktor-faktor tersebut dapat diketahui dari parameter fisika, kimia dan biologi. Parameter biologi yang digunakan untuk mengevaluasi kualitas air adalah  mikroorganisme patogen yang menimbulkan penyakit di sistem pencernaan seperti diare akut, yaitu Coliform dan Cryptosporidium. Tujuan penelitian ini adalah untuk mengetahui status kualitas air di Hulu Sungai Citarum dengan indeks kualitas air NSF-WQI, mengetahui hubungan dan pengaruh parameter fisik dan kimia air terhadap parameter biologi, menentukan faktor utama dari parameter air yang paling berpengaruh dan mengetahui hubungan serta pengaruh faktor utama tersebut terhadap Cryptosporidium. Metode yang digunakan adalah  mengambil sampel di tiap stasiun dengan composite, mengidentifikasi dan analisis Coliform dengan MPN dan identifikasi Crytosporidium dengan Ziehl Neelsen staining, kemudian menganalisis parameter kimia dan fisika dengan indeks NSF-WQI, lalu data tersebut diolah menggunakan metode statistik PCA. Hasil pengukuran kualitas air berdasarkan NSF-WQI adalah kualitas air di Hulu Sungai Citarum termasuk kategori buruk dan medium. Keberadaan Cryptosporidium di Hulu Sungai Citarum disebabkan oleh 2 (dua) faktor utama, yaitu faktor pertama terdiri dari DO, turbiditas, NO2, NH4 dan total Colifom, sedangkan faktor kedua terdiri dari TSS, COD dan PO4. Kedua faktor tersebut tidak signifikan dengan keberadaan Cryptosporidium di Hulu Sungai Citarum. Kata kunci: Cryptosporidium, Hulu Sungai Citarum, Indeks NSF-WQI, Kualitas Air
ANALISIS EFISIENSI TEORETIS KONDISI FABRIC FILTER DI UNIT COAL MILL PADA PT SG DI TUBAN JAWA TIMUR Huboyo, Haryono Setiyo
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 (66.635 KB) | DOI: 10.14710/presipitasi.v2i1.15-18

Abstract

Cement  Industrial  activities  produces  various  pollutants  mainly  dust  pollutant  and  gases pollutants. These  pollutants  come  up  from  material  handling,  production  process  (treatment, combustion  and finish  mill)  and  packing  process.  PT  SG  has  done  any  steps  to  controll  its pollutant  i.e  ambient and  emission  pollutant  measurements  and  conducting  abatement.  Bag filters in coal mill unit shows an excellent performance since its real dust output concentration only 22.9 and 13.4 mg/m3 far below emission standard 80 mg/m3. Theoretical efficiency of this device  was  assessed  using  design  criteria, limited  assumption  and  secondary  relevant literature.  Based  on  secondary  data  the  efficiency  was 99.9%  (higher  than  EPA  standard 99.5%). Its values are somewhat different using real output concentration showing 99.29% and 99.58%.  These  differences  were  subjected  to  limited  design specification  data  and  fluid properties exist.
Desulfurisasi Batubara Menggunakan Larutan Ekstrak Belimbing Wuluh (Everrhoa Bilimbi L) Amin, Muhammad; Birawidha, David Candra; Isnugroho, Kusno; Hendronursito, Yusuf; Muttaqqi, Muhammad Al; Prilitasari, Nurbaiti Marsas
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 (334.292 KB) | DOI: 10.14710/presipitasi.v16i2.44-52

Abstract

Desulphurization process can improve the quality of coal and reduce the environmental pollution. In this study, the method used for desulphurization process was a leaching method using wuluh starfruit extract as a leaching agent. Starfruit extract obtained by grinded, filtered and extracted the starfruit solution. Coal was crushed by using a grinding ball mill, sifted to obtain samples of 80 mesh, 120 mesh, and 150 mesh. Coal was added with starfruit extract, heated on a hotplate stirrer at a temperature of 110oC, 300 rpm of stirring speed and 3, 4 , 5 hours of leaching time. Leachate solution were analyzed using XRF test. The results of the study showed that 80, 120 and 150 mesh could produce 1.777%, 1.556% and 1.053% of sulfur, respectively. Maximum decrease of sulfur occurred in 150 mesh with 5 hours of leaching time which could reach 0.261% of concentration. Ash content also could decreased from 11.43% to 6.18% and fixed carbon content from 42.15% rose to 51.33%. The desulphurization process using starfruit extract was influenced by the grain size of the coal and the contact time of leaching. The finer the grain size of the coal and the longer the leach contact time, the smaller the sulfur content obtained in the coal after the desulfurization process was carried out
IDENTIFIKASI DAYA TAMPUNG BEBAN CEMARAN BOD SUNGAI DENGAN MODEL QUAL2E (STUDI KASUS SUNGAI GUNG, TEGAL – JAWA TENGAH) Nugraha, Winardi Dwi; Cahyorini, Lintang
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 (199.461 KB) | DOI: 10.14710/presipitasi.v3i2.93-101

Abstract

Gung  River  is  a  one  of  the  river  in  Central  Java  which  pass  trough  Tegal  Region  with total length about 48 km. The important thing in environmental problems that faced by Gung River such as increasing the load of water pollution.  BOD is one of the water pollution indicator in the streams. To make easier in knowing the the amount of Total Maximum Dailly Load (TMDL)in Gung River , it  is identified TMDL  of BOD uses modeling principal with Qual2E Modelling. And than  it  is  compared  with    the standar  streams  due  to  PP  No.  82/2001  about  Water  Quality Management and  Water Pollution Control. The result of simulation due to TMDL uses minimum flow rate is compared with standard stream ini PP 82 / 2001. It indicate that the quality could not meet with the standard stream related with the class 1 and class 2. In Reach 1 ( km 1 – 3  ) could meet with standar stream of class 3 with TMDL 1,43 – 9,98 kg/day. All the stream along the river could meet with standar stream ini class 4 with TMDL of BOD is 7,13 – 865,34 kg / day. The  result  of  simulation  due  to  TMDL  uses  maximum    flow  rate  is compared  with  standard stream  ini  PP  82  /  2001.  It  indicate  that  the  quality  could  not  meet with the  standard  stream related with the  class 1 and class 2. In Reach 1 ( km 1 – 3  ) could meet with standar stream of class  3  with  TMDL  72.06  –  3134,51  kg/day.  All  the  stream  along  the  river could  meet  with standar stream ini class 4 with TMDL of BOD is 7277,82 – 10.340,27 kg / day.
Pengaruh Variasi Jenis dan Ukuran Limbah Organik Terhadap Kadar Air Kompos Blok dan Pertumbuhan Tanaman Cabai Novita, Elida; Andriyani, Idah; Romadona, Zakina; Pradana, Hendra Andiananta
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 (974.834 KB) | DOI: 10.14710/presipitasi.v17i1.19-28

Abstract

Organic waste is potential as a compost material. It was supported by the amount of nutrient content. The compost block is a technology for utilizing organic material as a plant nursery. The research objective was to examine the variants of type and size of organic matter effect on the water content in compost blocks and vegetative growth of chili plants. The materials type of compost block were coffee pulp, tobacco petiole, and rice husks. Size variations in compost block were 10, 40 and 80 mesh. Experimental design on the types and sizes of organic materials using a Completely Randomized Design. The experimental results show that the highest value of water content in compost block with the watering of the same volume amount 51.22 mL of water is coffee pulp material with a range value of 40 - 50%. Coffee pulp and rice husk as compost block material influenced the vegetative growth of chili plants. The statistical tests that show a significant effect on the type and size of organic waste material on the chili plant growth i.e height and leaf area plants. The results become a consideration for variation type and size of organic waste choice for compost block materials.
DAMPAK PENURUNAN TANAH DAN KENAIKAN MUKA LAUT TERHADAP LUASAN GENANGAN ROB DI SEMARANG Kahar, Sutomo; Purwanto, Purwanto; Hidajat, Wahyu Krisna
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 7, No 2 (2010): Vol 7, No 2 (2010)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (688.367 KB) | DOI: 10.14710/presipitasi.v7i2.83-91

Abstract

Kota  Semarang sebagai  salah satu kota besar di Indonesia ,memiliki panjang  garis pantai ± 21 km dan secara topografi terbagi menjadi dua wilayah yaitu Semarang bagian atas dan Semarang bagian bawah. Semarang bagian bawah lapisan tanahnya didominasi oleh lapisan tanah Aluvial yang lunak sehingga  terus mengalami  pemampatan.  Kondisi  tersebut  mengakibatkan  kota  Semarang  bagian bawah  berpeluang besar  mengalami  dampak  lingkungan  disebabkan  penurunan  tanah,  salah  satu dampaknya adalah banjir pasang laut atau rob. Rob merupakan fenomena yang menarik yaitu banjir terjadi  tanpa  adanya hujan.  Berdasarkan  kenyataan  tersebut  perlu  dilakukan  penelitian  mengenai penurunan  tanah  dan prediksi  penurunan  tanah  di  Semarang  bagian  bawah.  Penelitian  ini menggunakan data pengukuran titik-titik tinggi tanah kota semarang dari tahun 2000 sampai dengan tahun 2010 . Berdasarkan serial data tinggi berbasis Digital Elevasi Model (DEM)/model permukaan dijital dan perilaku muka laut,  kemudian dianalisis menjadi model matematis berupa peta digital yang akan  digunakan  sebagai  dasar    untuk prediksi  genangan  rob  yang    setiap  saat  terjadi  sepanjang tahun.  Hasil  akhir  penelitian  ini  berupa Peta  Digital  tahun  2010  dan  Peta  prediksi  penyebaran  rob yang  merupakan  hasil overlay/pertampalan  analisis  prilaku  penurunan  tanah  dan  analisis  perilaku muka laut  di Kota Semarang bagian bawah.

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