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All Journal Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim Jurnal Kendali Teknik dan Sains Kohesi: Jurnal Sains dan Teknologi Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Observasi: Jurnal Publikasi Ilmu Psikologi Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Koosdaryani Soeryodarundio
Unknown Affiliation
Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics Social Sciences Other

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Kajian Penambahan Bakteri Probiotik Lokal Dengan Interval Waktu Inkubasi 8 Jam Terhadap Perubahan Kadar BOD dan COD Pada Air Buangan Industri Tahu Budi Utomo; Koosdaryani Soeryodarundio; Hendy Sugiharto
Jurnal Kendali Teknik dan Sains Vol. 2 No. 3 (2024): Juli : Jurnal Kendali Teknik dan Sains
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/jkts-widyakarya.v2i3.3958

Abstract

Tofu has become one of the most popular foods among the people of Indonesia. This encourages the existence of a growing tofu manufacturing industry. However, the growth of this industry also results in a lot of waste being generated. If the waste is not treated properly, it can cause pollution because it contains very high BOD and COD levels. One of the ways that researchers do is by utilizing local probiotic bacteria to help reduce BOD and COD levels. Data analysis in this study is in the form of statistical analysis, where statistical data will be presented with graph/diagram methods that show the results of differences in BOD and COD values in Tofu Industry Wastewater before and after treatment. Based on the results of the study, there was a significant decrease in BOD and COD levels due to the addition of local probiotic bacteria. The efficiency of the largest decrease in BOD levels was 79.88% in the sample variation with a probiotic content of 75% when the incubation time interval was 32 hours. Meanwhile, the largest decrease in COD levels also occurred in the same sample variation with an efficiency of 74.76%.
Analisis Manajemen Risiko Proyek dengan Metode Severity Index (SI) pada Proyek Pembangunan Gedung X Kota Surakarta Ahmad Rizky Zaidan; Koosdaryani Soeryodarundio; Setiono Setiono
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 2 No. 3 (2024): Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v2i3.501

Abstract

The construction of a high-rise building is a construction project that can be said to have high risk factors so that it will have a negative effect on the project schedule, quality, and costs needed. Project risk management analysis is needed to control risks and to determine risk handling to prevent the occurrence of dominant risks in construction projects. In this study, primary data collection was carried out by distributing questionnaires, while secondary data was obtained through data from projects and literature studies. The data obtained from the questionnaire will be analyzed for risk variables using the Severity Index (SI) method. Meanwhile, the risk level analysis uses the Probability Impact Matrix (PIM). The results of the analysis show that there is a dominant risk that has the most influence on the time aspect is the risk of delay in material delivery with a high level of risk. The dominant risk that has the most influence on the cost aspect is the occurrence of equipment damage while working with a medium risk level. The dominant risk that has the most influence on the quality aspect is that the quality of the material is not in accordance with the quality specifications with a medium risk level.
Studi Perancangan Instalasi Pengolahan Air Limbah (IPAL) Domestik di Desa Butuh, Kecamatan Butuh, Kabupaten Purworejo Anggie Herlambang Ainul Yaqien Machsuni Hadi; Budi Utomo; Koosdaryani Soeryodarundio
Observasi : Jurnal Publikasi Ilmu Psikologi Vol. 2 No. 4 (2024): November : Observasi: Jurnal Publikasi Ilmu Psikologi
Publisher : Asosiasi Riset Ilmu Kesehatan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/observasi.v2i4.669

Abstract

Butuh Village is one of the villages in Butuh District, Purworejo Regency, Central Jawa Province. The villages’s need for awareness of adequate sanitation is still quite low. This can be proven by the fact that there are still many houses that do not have adequate domestik waste processing infrastructure. AS we know, if we dispose of domestik waste in the form of grey water and black water directly into the environment without a good waste processing system, it will pollute the environmen. The aim of this design is to determine the domestik wastewater treatment bulding in Butuh village using the hierarchical method.The final calculation using the hierarchical method resulted in thr selected domestic wastewater treatment being the Anaerbic Buffled Reactor (ABR) using 4 parameters in the form of maintenance operatinal cost, land area used, construction costs and removal efficiency. The Anaerobic Buffled Reactor (ABR) is planned to have 5 compartments with a BOD removal efficiency of 84%, construction cost of Rp. 67.899.607, the land area required is 45 m2, and operational costs are Rp. 2.605.281 and maintenance is relatively easy.
Analisis Pemberian Bakteri Probiotik Komersial pada Air Buangan Industri Tahu Terhadap Perubahan Kadar BOD dan DO dengan Interval Waktu Inkubasi 8 Jam Justian Trisna Nugraha; Budi Utomo; Koosdaryani Soeryodarundio
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 2 No. 3 (2024): Juli: Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipi
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v2i3.476

Abstract

This study aims to analyze the impact of administering commercial probiotic bacteria on the wastewater from tofu industries on changes in Bio-logical Oxygen Demand (BOD) and Dissolved Oxygen (DO) levels. Tofu industry wastewater is known to have high BOD and low DO levels, which pose a potential environmental pollution risk. This study used a pure experimental method with variables including the ratio of tofu industry wastewater to commercial probiotics (1:1, 1:2, 1:3) with an incubation interval of 8 hours. The results showed that the administration of commercial probiotic bacteria significantly reduced BOD levels and increased DO levels in the wastewater. The 1:3 ratio of tofu industry wastewater to commercial probiotics showed the most optimal effect in increasing DO and decreasing BOD. An incubation time of 32 hours showed the most optimal effect in increasing DO and decreasing BOD. The 1:3 volume ratio between tofu wastewater and probiotics (25% tofu wastewater and 75% probiotics) proved to be the most effective, with the highest DO increase of 2.51 mg/L and the largest BOD decrease of 144.20 mg/L. In addition, incubation time also had a significant effect, the longer the incubation time, the more optimal the probiotic activity in reducing BOD levels and increasing DO levels. The conclusion of this study is that the administration of commercial probiotic bacteria at a 1:3 ratio and an incubation time of 32 hours is an effective way to improve the quality of tofu industry wastewater.
ANALISIS RISIKO PELAKSANAAN PEMBANGUNAN PADA PROYEK KONSTRUKSI POLITEKNIK MARITIM NEGERI INDONESIA Muhammad Wildan Ma’arif; Ary Setyawan; Koosdaryani Soeryodarundio
Kohesi: Jurnal Sains dan Teknologi Vol. 5 No. 6 (2024): Kohesi: Jurnal Sains dan Teknologi
Publisher : CV SWA Anugerah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.3785/kohesi.v5i6.8177

Abstract

Pelaksanaan proyek konstruksi selalu dihadapkan dengan berbagai risiko yang dapat mengganggu waktu, biaya, dan mutu dalam pelaksanaan proyek. Risiko dapat timbul pada setiap kegiatan atau pekerjaan dalam proyek konstruksi, akan tetapi tingkat risiko dalam setiap pekerjaan sangat bervariasi. Maka diperlukan manajemen risiko untuk mengurangi dampak yang merugikan dalam mencapai tujuan proyek. Tujuan dari penelitian ini adalah untuk menentukan risiko yang paling berpengaruh terhadap waktu, biaya, dan mutu pada proyek pembangunan kampus baru Polimarin, serta mengidentifikasi strategi untuk mengurangi risiko yang terjadi. Penelitian ini dilakukan dengan cara survey menggunakan kuisioner terhadap 36 responden. Metode analisis dimulai dari identifikasi variabel risiko berdasarkan studi literatur. Selanjutnya dilakukan uji relevansi variabel risiko menggunakan Skala Guttman. analisis variabel risiko dengan metode severity indeks, analisis tingkat risiko menggunakan tabel matriks probabilitas dan dampak, dan yang terakhir menentukan respon risiko yang tepat terhadap variabel risiko yang dominan. Hasil Penelitian menunjukkan bahwa (1) Didapatkan 3 variabel risiko dominan terhadap aspek waktu, 2 variabel risiko dominan terhadap aspek biaya, dan 4 variabel risiko dominan terhadap aspek mutu, (2) Didapatkan 9 strategi penanganan risiko yang dapat dilakukan kontraktor terhadap variabel-variabel risiko yang telah dianalisis.
Analisis Akar Masalah Keterlambatan Pengerjaan pada Proyek Konstruksi Politeknik Maritim Negeri Indonesia Naufal Iman Adzhan; Ary Setyawan; Koosdaryani Soeryodarundio
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 2 No. 6 (2024): Desember : Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v2i6.647

Abstract

The construction industry in Indonesia is growing rapidly, playing a crucial role in the country's economic, political, and social development. However, alongside this rapid growth, issues such as project delays are inevitable. The construction project of the Indonesian Maritime Polytechnic, for instance, has experienced significant delays, which can lead to increased costs, waste of human resources, and disputes among the involved parties. Understanding the primary causes of these delays is essential for developing effective strategies to avoid future delays. This analysis uses both qualitative and quantitative methods to identify the root causes of delays. Data was collected through surveys of respondents involved in the project, including project managers, field staff, and consultants. The analyzed causes of delays include insufficient funding, increases in raw material costs, additional costs, contract document errors, poor communication, and slow decision-making. To minimize delays and their impacts, several recommendations can be made: effective strategic planning, improved communication, increased staff, accurate initial cost estimates, and good management. By implementing these recommendations, the Indonesian Maritime Polytechnic construction project can be completed more effectively and efficiently, and future delays can be avoided.
Evaluasi Efektivitas Kinerja Instalasi Pengolahan Air Limbah (IPAL) di Kota Surakarta Rizky Nugraha Ramadhan; Budi Utomo; Solichin Solichin; Cahyono Ikhsan; Koosdaryani Soeryodarundio
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 3 (2024): September: Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i3.2421

Abstract

Household sewage treatment in Surakarta City depends on the performance of the available domestic wastewater treatment plants (IPAL), including Pucangsawit IPAL, Semanggi IPAL, Mojosongo IPAL, and UNS IPAL. Each of these IPAL’s serves a specific area, such as the UNS IPAL which serves the UNS area and its surroundings, the Mojosongo IPAL which is in charge of the North Area of Surakarta, the Semanggi IPAL which takes care of the South Area of Surakarta, and the Pucangsawit IPAL which serves the Central Area of Surakarta City. This research aimed at the effectiveness of the performance and development plan of each IPAL in the next 20 years. This research used descriptive qualitative and quantitative analysis methods. Qualitative descriptive analysis was conducted by observing the existing condition of IPAL Komunal in the research location. Quantitative descriptive analysis in this study was carried out by testing samples at the inlet, aeration, and outlet points of the IPAL. Based on the quality standards of the Minister of Environment and Forestry Regulation number P 68 of 2016, each IPAL. UNS IPAL is 47.27% for BOD, 73.81% for COD, 76.36% for TSS. Mojosongo IPAL is 88.71% for BOD, 76.50% for COD, 78.57% for TSS. Pucangsawit IPAL was 91.88% for BOD, 83.20% for COD, 74.82% for TSS. Semanggi IPAL is 20.45% for BOD, 69.95% for COD, 69.05% for TSS. Alternative development at the IPAL that can be done to prepare for the next 20 years is to increase the volume in the initial settling basin, aerobic biofilter basin, and also the final settling basin.
Analisis Perbandingan Produktivitas dan Value Engineering pada Pelaksanaan Pekerjaan Pemasangan Bata Merah dan Bata Ringan: (Studi Kasus : Proyek Perumahan Shopee Semanggi) Ivan Fadhila; Ary Setyawan; Koosdaryani Soeryodarundio
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 3 No. 2 (2025): April: Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sip
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v3i2.776

Abstract

The selection of building materials is vital for the development of high-quality infrastructure and residential projects. The two most commonly used building materials are red bricks and lightweight bricks. This study compares the productivity and cost of red brick and lightweight brick production and installation in construction projects. Data were obtained through direct observation, worker interviews, and Value Engineering analysis on the Shopee Semanggi Housing Project, which consists of 136 houses with a total estimated budget (RAB) of Rp10.93 billion. The results show that red brick installation productivity is 3.3 m²/day, while lightweight brick installation reaches 17.9 m²/day. The installation cost for red bricks is Rp1.52 billion for 12,786.78 m², compared to Rp1.62 billion for lightweight bricks for the same area. This study provides guidance for selecting building materials based on time and cost efficiency.
Co-Authors Ahmad Rizky Zaidan Anggie Herlambang Ainul Yaqien Machsuni Hadi Ary Setyawan BUDI UTOMO Cahyono Ikhsan Hendy Sugiharto Ivan Fadhila Justian Trisna Nugraha Muhammad Wildan Ma’arif Naufal Iman Adzhan Rizky Nugraha Ramadhan Setiono Setiono Solichin Solichin