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All Journal Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Serambi Engineering Nusantara Science and Technology Proceedings Envirotek : Jurnal Ilmiah Teknik Lingkungan Serambi Engineering
Okik Hendriyanto Cahyonugroho
Department Of Environmental Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya 60294, Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Public Health

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Journal : Serambi Engineering

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Pemanfaatan Limbah Keraginan Rumput Laut Menjadi Plastik Biodegradable Eginta Marovid Tarigan; Okik HendriyantoCahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 1 (2024): Januari 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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This research aims to utilize seaweed craft waste as a basic material for biodegradable plastic by adding chitosan and sorbitol as plasticizers. Seaweed craft waste is extracted to obtain cellulose which is then mixed with chitosan and sorbitol in certain variations. The mechanical characteristics, biodegradation and water absorption capacity of the resulting biodegradable plastic were evaluated. The research results showed that the tensile strength of biodegradable plastic ranged from 1.68 to 2.41 MPa, elongation ranged from 6.9% to 20.9%, biodegradation test ranged from 63.5% to 66.53%, and water absorption capacity. ranges from 1.8% to 2.37%. Statistical correlation shows that the addition of chitosan tends to strengthen the mechanical properties and inhibit biodegradation and water absorption, while the addition of sorbitol tends to weaken the mechanical properties and increase the water absorption. The optimum conditions for biodegradable plastic vary depending on the parameters measured, and the characteristics of the plastic do not fully meet applicable standards. Nevertheless, this research provides an overview of the potential and limitationsof using seaweed craft waste for the production of biodegradable plastic.
Evaluasi Pengelolaan Limbah B3 PT Perusahaan Gas Negara TBK – Sales & Operation Regional III (Studi Kasus Offtake Station Waru) Zakkiyah Salwa Meydhita Nur Sabrina; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 2 (2024): April 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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PT Perusahaan Gas Negara Tbk (PGN) - Sales and Operation Region III (SOR III) is a natural gas distribution company. PGN generates hazardous and toxic waste (B3) from operational activities and equipment maintenance. The company manages the waste to reduce the environmental impact through various stages such as reduction, storage, packaging, labelling and transport in collaboration with third parties. The aim of this research is to evaluate the company's B3 waste management practices and, if necessary, propose recommendations for improvement. The research method used was field observation, analysis of internal documents related to B3 waste management and evaluation using the Guttman Scale method. The results of the B3 waste management assessment showed a score of 77.4% and was categorised as "good".
Evaluasi Unit Filtrasi IPAM Ngagel II Surabaya Siti Kayyisa Nakhwa Endjani; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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IPAM Ngagel II Surabaya is one of the drinking water treatment plants managed by PDAM Surya Sembada Kota Surabaya, which was established in 1959 with a production capacity of 1000L/second. At IPAM Ngagel II, there are several treatment units consisting of intake, pre-sedimentation, accelerator, filtration and disinfection. The aim of this research is to evaluate the filtration unit as an optimisation effort to increase production capacity. The research was carried out by analysing the filtration performance to see the efficiency of removing turbidity and organic matter. The existing condition of the filtration unit was then compared with standard filtration unit design criteria. Water samples were taken in the morning for 20 days by testing the quality of the raw water and the effluent at the pre-sedimentation, accelerator and filtration treatment units. Based on the analysis results, the turbidity removal efficiency is more than 70% on average, while the organic matter removal efficiency is less than 20% on average. The way to optimise the filtration unit is not to change the condition of the existing unit, as the quality of the produced water still meets the standards, but it is necessary to check the height of the filter media and to replace single media with double media.
Perencanaan Implementasi Strategi Creating Shared Value dalam Pengelolaan Limbah Ex - Blasting PT INKA (Persero) Andhyanerra Irsia Prasasti; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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PT INKA (Persero) is an industry that operates in the field of railway manufacturing. One of the programs consistently carried out by PT INKA (Persero) is Corporate Social Responsibility (CSR). CSR is a commitment by the company to care for sustainable development and provide numerous benefits from social, economic, legal and environmental aspects. The CSR program is oriented towards the Sustainable Development Goals (SDGs). Not Only CSR, but recently several companies or industries have implemented the Creating Shared Value (CSV) strategy, where CSV is a concept of CSR that realizesshared value beneficial to both society and the company. This study focuses on the reuse of ex – blasting waste as paving blocks as strategy for CSV.
Perencanaan Implementasi Strategi Creating Shared Value dalam Pengelolaan Limbah Ex - Blasting PT INKA (Persero) Andhyanerra Irsia Prasasti; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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PT INKA (Persero) is an industry that operates in the field of railway manufacturing. One of the programs consistently carried out by PT INKA (Persero) is Corporate Social Responsibility (CSR). CSR is a commitment by the company to care for sustainable development and provide numerous benefits from social, economic, legal and environmental aspects. The CSR program is oriented towards the Sustainable Development Goals (SDGs). Not Only CSR, but recently several companies or industries have implemented the Creating Shared Value (CSV) strategy, where CSV is a concept of CSR that realizes shared value beneficial to both society and the company. This study focuses on the reuse of ex – blasting waste as paving blocks as strategy for CSV.
Evaluasi dan Optimalisasi Kinerja Unit Accelerator Pada IPAM Ngagel II Kota Surabaya Fadhilah Labibah Nurjanah; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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IPAM Ngagel is one of the drinking water purification plants (IPAM) owned by PDAM Surya Sembada Surabaya City as a provider of clean water needs for the people of Surabaya City. In order to meet the demand for clean water, the raw water used in the Ngagel Water Treatment Plant has to pass through several treatment units. However, there are several obstacles that result in the treatment unit not operating optimally. Therefore, this research aims to evaluate and compare the performance of one of the treatment units, the accelerator unit. This research method includes field studies, literature studies, data analysis and interviews using data in the form of inlet and outlet water quality of the accelerator unit and the use of coagulant doses for 20 days. The results obtained for the percentage removal in accelerator 1 are turbidity 90.32%, organic compounds 18.76%, ammonia 46.04% and nitrite -2.40%. While the percentage removal in accelerator no. 3 is 84.23% turbidity, 15.75% organic compounds, 25.68% ammonia and -19.48% nitrite. Based on the evaluation results, the removal efficiency in accelerator number 1 is better than that in accelerator number 3. This is because the operations in the accelerator unit, particularly the use of coagulant doses, are not in accordance with what is required, and this affects the difference in the performance of the accelerator unit.
Perencanaan Bangunan Instalasi Pengolahan Air Limbah Komunal Industri Tahu di Kabupaten Jombang Aisyah Nadia; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Tofu is a food product made from soya beans and is a widely used cottage industry in Jombang district. Many people engage in this business because the production process is relatively simple and does not require complicated equipment. Tofu is also a product with fairly stable demand in local and regional markets, making it an attractive business option for small and medium enterprises (MSMEs). Due to cost constraints, some industries do not have wastewater treatment. Waste from production is discharged directly into watercourses, leading to degradation of the surrounding environment. This research aims to design the wastewater treatment plant (WWTP) in Jombang. A total of 600 m3 / day of wastewater is discharged from 70 tofu industries. Based on the wastewater discharge, a water treatment system is planned in the form of an equalisation tank (27.386 x 9.1287 x 2 m), settling tank (32.533 x 38.73 x 2 m), anaerobic baffle reactor with a total of 6 compartments (103.28 x 38.7 x 2 m), aeration (37.879 x 11 x 1.8 m), and finally wetland (103.36 x 38.7 x 2 m). The area required is 5926.667 m2.
Potensi dan Efektivitas Limbah Cair Industri Tahu Sebagai Pupuk Organik Cair Terhadap Pertumbuhan Cabai dan Tomat Shinta Ajeng Salyndri Hifdzul Aqlys; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Most of the tofu industries in Jombang dump their waste directly into the river. This causes discolourationof the river and unpleasant odours. High organic content in the water can reduce dissolved oxygen (DO)levels and increase pollutant parameters that can harm the environment. Waste recycling can be a way toreduce pollution. With a high organic content, tofu liquid waste has great potential as a fertiliser. Theaddition of EM4 bioactivator in the production of fertiliser can help the fermentation process with the aimof improving the quality of soil structure. This study aims to determine the potential and effectiveness ofliquid organic fertilizer produced from tofu liquid waste. The research method used was a field experimentwith a quantitative approach. The experiment starts with the production of liquid organic fertilizer fromtofu liquid waste, which is then applied to chilli (Capsicum frutescens L) and tomato (Solanumlycopersicum L) plants, and there is a control (no treatment or fertilizer) for comparison. The observationresults show that the liquid organic fertilizer (POC) from tofu liquid waste is very influential on the growthof chilli and tomato, especially in the vegetative period.
Pengaruh Konsorsium Mikroalga Tetraselmis sp. dan Chaetoceros sp. dengan Rasio N/P Terhadap Penurunan Nitrat dan Kelimpahan Mikroalga Savira Fevilia; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Microalgae are distributed in various types. Each type of microalgae has its own ability to absorb nutrients, especially nitrates. In several journals it is stated that microalgae are often used as phycoremediation. Nitrate and phosphate are macronutrients for microalgae that are needed based on certain ratios. So a lack of nitrogen content can result in substantial inhibition of algal growth and thus suboptimal nutrient consumption. This research aims to determine the effectiveness of microalgae consortia on nitrate removal and the effect of the N:P ratio on microalgae abundance. The microalgae used is Tetraselmis sp. and Chaetoceros sp. After being tested in batches, it was discovered that the Tetraselmis sp. consortium. and Chaetoceros sp. microalgae are able to remove nitrate content up to 94.1% with sample B1 (ratio of microalgae Chaetoceros sp. : Tetraselmis sp. = 100:0. This effectiveness occurs in the pH range 7.8 – 8.9 with a temperature of 28.67°C - 22, 67°C. The ratio of nitrate and phosphate content influences the abundance of microalgae. The ratio of 16:1 is influential in producing the highest abundance of more variations in microalgae consortia than other ratios.
Analisis Kekuatan Bending Akibat Variasi Arus Pengelasan SMAW Pada Sambungan Pipa Api 5L GR.B SCH 80 Aditya Rizky Dwicahya; Okik Hendriyanto Cahyonugroho
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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In this research, we use experimental research to determine the characteristics of a material, namely API 5L Grade B sch 80 pipe, using variations in welding current using SMAW (Shielded Metal Arc Welding) welding to determine the effect of variations in SMAW welding current on the value of liquid penetrant test results, radiographic test and mechanical properties of bending tests on API 5L Grade B sch 80 pipe material. It can be concluded that welding with variations in current strength of 80 A gives an average value of 396.381 MPa from the bending test results. Meanwhile, when the current variation is 100 A, it is known that the result of the current variation of 100 A is 652.315 MPa. It is known that when the amperage is varied by 120 A, the value of the bending test results is smaller than when the amperage is varied by 80 A, and when the amperage is varied by 100 A, the average value of the amperage variation by 12 A is 286.744 MPa. In conclusion, since there are no defects in this liquid penetrant test that could be dangerous or cause leakage, the welding results can be used or continued. There are deficiencies in the test results, but the NDT inspector with certification number SNS/PT/RN-23008 can still approve them
Co-Authors Aditya Rizky Dwicahya Aditya Titian Dickdoyo Aisyah Nadia Andhyanerra Irsia Prasasti Eginta Marovid Tarigan Euis Nurul Hidayah Fadhilah Labibah Nurjanah Fairuz Khurotul Aini Firra Rosariawari Imaniar Ramadhani Indah Nur Fauziyyah Lolita Kurniasari Mochammad Shaifullah Indrawanto Novembrianto, Rizka Novira Putri Amini Praditya Sigit Ardisty Sitogasa Raka Rulistyanto Prakoso Putra Restu Hikmah Ayu Murti Rimadhani Prilindatami Savira Fevilia Savira Safrilia Shinta Ajeng Salyndri Hifdzul Aqlys Siti Kayyisa Nakhwa Endjani Syadzadhiya Qothrunada Zakiyayasin Nisa' Valentino Rizkiar Pradana Zakkiyah Salwa Meydhita Nur Sabrina