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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi
Junaidi Junaidi
Universitas Diponegoro
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering

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PENGEMBANGAN TEKNOLOGI FILTER UNTUK MEWUJUDKAN SUSTAINABLE WATER RECYCLE DI RT17/RW06 KELURAHAN PUDAKPAYUNG KOTA SEMARANG Bimastyaji Surya Ramadan; Junaidi Junaidi; Syafrudin Syafrudin; Anik Sarminingsih; Ika Bagus Priyambada
Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Vol 2, No 1 (2020)
Publisher : Fakultas Teknik Universitas Diponegoro

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Abstract

Kegiatan pengabdian masyarakat ini bermitra dengan kelompok masyarakat RT 17 RW 06 dalam penerapan teknologi filter air untuk penjernihan kolam ikan di Kelurahan Pudakpayung Kota Semarang. Lokasi mitra berada di kawasan perumahan di Kelurahan Pudakpayung. Teknologi filter air merupakan teknologi yang menggunakan tekanan dan UV untuk meningkatkan kualitas air hasil filtrasi. Masih banyak masyarakat yang belum memahami teknik pembuatan dan pengelolaan air yang berkelanjutan. Oleh karena itu dalam kegiatan ini diberikan workshop tentang berbagai ilmu tentang teknologi filter air konvensional, penjelasan mengenai operasi dan sistem pemeliharaan serta pendampingan pemasangan filter air,Metode pengabdian yang digunakan pada program ini adalah melakukan evaluasi terhadap kegiatan pemasangan filter air dan mencari alternatif baru pemecahan masalah. Hasilnya, saat ini RT17 RW 06 dapat merasakan daur ulang air yang berkelanjutan di kolam ikan masjid mereka. 
INISIASI PEMBENTUKAN BANK SAMPAH DI RT 03 RW 03 KELURAHAN GEDAWANG KOTA SEMARANG Syafrudin Syafrudin; Junaidi Junaidi; Bimastyaji Surya Ramadan
Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Vol 1, No 3 (2019)
Publisher : Fakultas Teknik Universitas Diponegoro

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Abstract

Bank sampah mampu meningkatkan reduksi sampah di tingkat rumah tangga secara efektif serta meningkatkan pendapatan masyarakat secara simultan. Program pengabdian yang dilakukan di RT 03/RW 03 merupakan inisiasi pendirian bank sampah yang diharapkan dapat menjadi contoh bagi wilayah lain untuk mengembangkan bank sampah secara mandiri. Kegiatan pengabdian masyarakat terdiri dari 3 tahap yang meliputi tahap persiapan, pelaksanaan dan akhir. Pada tahap persiapan, survei lokasi dan penyebaran undangan dilakukan untuk memberikan informasi mengenai kegiatan workshop dan bimbingan teknis yang akan dilakukan. Bimbingan teknis dan workshop dilakukan dengan pemberian informasi kepada masyarakat mengenai urgensi, tata cara dan syarat pendirian bank sampah yang disampaikan oleh dosen dari Departemen Teknik Lingkungan, Universitas Diponegoro. Masyarakat terlibat aktif dalam kegiatan sosialisasi dengan mendiskusikan permasalahan yang mungkin akan mereka hadapi ketika mengembangkan bank sampah di wilayah ini. Pada tahap akhir, dilakukan monitoring terhadap pembentukan bank sampah yang dilakukan oleh kelompok swadaya masyarakat RT 03 RW 03. Setelah kegiatan ini masyarakat dapat memahami urgensi pendirian bank sampah di lingkungannya. Harapannya, muncul bank sampah – bank sampah baru yang berkembang secara mandiri. Selain itu, harapannya jumlah timbulan sampah dapat menurun karena adanya kegiatan pemanfaatan sampah di bank sampah yang terbentuk.
DAUR ULANG SAMPAH PLASTIK MENJADI BARANG BERNILAI SENI TINGGI BAGI PAGUYUBAN BANK SAMPAH KOTA SEMARANG Sri Sumiyati; Junaidi Junaidi; Bimastyaji Surya Ramadan; Anik Sarminingsih; Arya Rezagama
Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Vol 2, No 4 (2020)
Publisher : Fakultas Teknik Universitas Diponegoro

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Abstract

Paguyuban Bank Sampah Kota Semarang dalam kegiatannya banyak bekerjasama dengan Dinas Lingungan Hidup Kota semarang. Setiap bank sampah tingkat kelurahan telah melakukan pengelolaan dan penjualan sampah nasabah yang meliputi pemilahan, pencatatan dan penjualan sampah secara langsung. Selain itu bank sampah yang sudah menjadi anggota Paguyuban Bank Sampah Kota juga telah melakukan usaha pengolahan sampah menjadi barang yang bernilai ekonomis dan nilai seni lebih tinggi. Tujuan kegiatan pengabdian kepada masyarakat ini memberikan pelatihan pemanfaatan sampah plastik menjadi barang yang bernilai seni bagi anggota Paguyuban Bank Sampah Kota Semarang. Kegiatan pengabdian kepada masyarakat ini dikelompokkan menjadi 3 tahap, yaitu tahap 1. Koordinasi dengan mitra, 2) Pelatihan pemanfaatan sampah plastik menjadi barang yang bernilai seni, dan 3). Monitoring dan evaluasi kegiatan pengabdian kepada masyarakat. Sampah non-organik berupa sampah plastik kemasan bungkus makanan dan minuman telah dapat dibuat kreasi menjadi barang yang bermanfaat untuk kebutuhan sehari-hari seperti bunga, taplak, tas, dompet, tempat lampu belajar, gantungan kunci serta pigura foto, lampu hias dan lain-lain. Dengan mengolah limbah plastik menjadi barang yang berguna selain dapat menyalurkan ide dan kreativitas juga dapat menjadi peluang usaha rumah tangga (home industry) yang berpeluang secara ekonomis dan nilai seni yang tinggi.
The Moisture Content of Sawdust Fuel Pellets at Different Drying Periods Junaidi Junaidi; Yustina Metanoia Pusparizkita; Attaya Juliatiko; Ngakan Ade Rahmadiputra; Sudarno Sudarno
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 19, No 3 (2022): November 2022
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v19i3.599-606

Abstract

The development of pellet fuel from biomass has a great opportunity because Indonesia is an agricultural country. Utilizing this biomass can increase economic value, minimize waste generated, and reduce emissions released into the environment. In this study, the pellet fuel was made from sawdust obtained from the Semarang wood sawmill industry. The raw materials are mixed with adhesive, water and then formed using a pellet machine. The high water content in the pellets that have just come out of the pelletizing (27%) process requires drying treatment. The aim of this work was to find out the effect of drying time on the moisture content of the pellet fuel to meet existing standards. The variation of drying time used is 10, 15 and 20 minutes at 100° C. The results showed that the moisture content of the pellet was 22% (10 min), 19% (15 min) and 17% (20 min). The water content in the pellets will decrease 4% on average along with the drying time. However, the water content was still slightly higher than the specified standard (8-13%). Based on model predictions, the necessary drying time is 30-35 min. Ash content obtained from this study is 0.7%. The drying time can affect the density of the resulting pellet product.  Accordingly, further studies are needed to determine the drying optimum temperature.
Physical and Chemical Treatability Assessment for Food Industry Wastewater in Wastewater Treatment Plant Design Wiharyanto Oktiawan; Junaidi Junaidi; Fadhila Raziani
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.229-237

Abstract

Food industry wastewater has characteristics that contain high organic matter and suspended solids. Most of the methods used are physical and chemical treatment because these methods have high efficiency and effectivity. In designing a new wastewater treatment plant, the treatability assessment is essential to any consideration or reference in planning the treatment process to be implemented. This research aims to obtain treatability assessment results that will be used as consideration in planning treatment units in WWTP according to the characteristics of wastewater tested. The removal results of the sedimentation test with Imhoff Cone were able to remove 51.2% COD, 64.04% BOD, and 95.21% TSS with the optimum settling time of 40 minutes. The samples test continued to the rapid-slow mixing test using the jar test, resulting that by adding coagulant at the optimum dose of PAC 120 mg/L, it was capable to remove 68.21% of COD, 73.22% of BOD, and up to 98.07% of TSS at the end of the process. Based on the assessment results, the physical and chemical treatment can remove suspended solids pollutant parameters with high efficiency so it will be considered to be used in planning Wastewater Treatment Plants for this food industry.
Landfill Leachate Treatment with Ozonation to Improve Biodegradability Junaidi Junaidi; Wiharyanto Oktiawan; Komang Dewi Novianti
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 3 (2023): November 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i3.669-679

Abstract

Leachate is a liquid that comes from processed waste generation so that it contains compounds that are harmful or toxic to the environment. The quality of the leachate obtained included COD: 3,315 mg/l, BOD: 339 mg/l, TSS: 216 mg/l, and color 3,1210 Pt.Co. Waste processing site Temesi has a BOD/COD ratio of 0.11, this value is not suitable for using biological treatment because the biodegradability value is small so it is difficult for microorganisms to degrade existing pollutants. Therefore, it is necessary to have an pretreatment that is used to increase the value of biodegradability, one of which is oxidation using ozone. Ozone has a strong oxidizing value so that it can produce free radicals to break long chains of pollutants so that they become simpler. This research on ozone oxidation resulted in an increase in the BOD/COD ratio from 0,1 to 0.14 with a generator capacity of 36 g/hour. In this study, an ozone generator of 100 G/hour was used which increased the BOD/COD ratio to 0.46 with a final COD yield of 815 mg/l increasing BOD to 379 mg/l, TSS become 157,62 mg/L and color become 23.642 Pt.Co.
Microbiologically Induced Corrosion (MIC) of Carbon Steel in Biodiesel: a Comparative Analysis Junaidi Junaidi; Tjandra Setiadi; Hary Devianto; Wolfgang Schmahl; Yustina Metanoia Pusparizkita
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 2 (2024): July 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i2.381-389

Abstract

The damaging process known as microbiologically influenced corrosion (MIC) can be triggered by the bioactivities of microorganisms. The occurrence of this phenomenon can be attributed to the presence of biodiesel in carbon steel diesel mixture storage tanks, since the biodegradability of the fuel promotes microbial development and the MIC process. In this work, the effects of different biodiesel concentrations (B0, B15, B20, B30, and B100) on biocorrosion in ST-37 carbon steel caused by three species were investigated. Some of the species confirmed to be involved are S. marcescens, B. megaterium and B. lichenisformis. These three species are undoubtedly able to survive in a biodiesel-based media. In addition to producing EPS, a species that may slow the rate at which carbon steel corrodes, biodiesel can be utilised as a supply of nutrients. Nonetheless, the diverse life cycles of microbes have the potential to accelerate corrosion of carbon steel. The average corrosion rate with the effect of B. lichenisformis is lower than the other two species, notably in the B100, with fewer colonies than S. marcescens and B. megaterium.Some of the species confirmed to be involved are S. marcescens, B. megaterium and B. lichenisformis.
Co-Authors Anik Sarminingsih, Anik Arya Rezagama Attaya Juliatiko Fadhila Raziani Hary Devianto Ika Bagus Priyambada Komang Dewi Novianti Ngakan Ade Rahmadiputra Ramadan, Bimastyaji Surya Sri Sumiyati Sudarno Sudarno Syafrudin Syafrudin Tjandra Setiadi Wiharyanto Oktiawan Wolfgang Schmahl Yustina Metanoia Pusparizkita