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All Journal Eksergi: Chemical Engineering Journal Jurnal SOLMA Berdikari: Jurnal Pengabdian Masyarakat Indonesia International Journal of Marine Engineering Innovation and Research JURNAL REKAYASA KIMIA & LINGKUNGAN
Nita Ariestiana Putri
Program Studi Teknik Kimia Institut Teknologi Kalimantan, Balikpapan, Kalimantan Timur, 76127 Indonesia
Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation Other

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Pemanfaatan Limbah Cangkang Telur Untuk Pembuatan Pupuk Organik Cair dan Karya Mozaik Melalui Kegiatan Sosialisasi Dengan Warga Giri Mulyo RT 22, Kelurahan Karang Joang, Balikpapan Utara Lusi Ernawati; Rizka Ayu Yuniar; Rizka Lestari; Nita Ariestiana Putri
Berdikari: Jurnal Pengabdian Masyarakat Indonesia Vol. 5 No. 2 (2023): Berdikari: jurnal Pengabdian Masyarakat Indonesia
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/bjpmi.05.02.4

Abstract

Recycled waste management, especially in the Giri Mulyo area, is still less than optimal. Giri Mulyo itself is a community village located in Karang Joang village, North Balikpapan sub-district. Most of the residents of Giri Mulyo work as farmers. Based on information from the surrounding community, there has been a decrease in agricultural yields since the covid-19 pandemic. The decrease in income and the increase in the price of fertilizers sold in the market have forced farmers to reduce the amount of fertilizer applied to their agriculture. Based on these problems, an alternative fertilizer that is more friendly to the pockets of farmers in the Giri Mulyo area is needed. So far, many local people have used food waste to make compost as an alternative to fertilizer. However, this method is considered to take a long time and cause unpleasant odors in their environment and also the durability of compost is still quite low. To overcome these problems, the local community needs to be given socialization about information on making organic fertilizer made from household waste, does not require a long time in the manufacturing process and has a high level of product durability. The basic material used is eggshell waste. Organic fertilizer made from eggshell waste contains a high amount of calcium so that it has a good impact on the maintenance of nutrients in the soil, in line with the increase in plant fertility. In addition to being used as a medium for making liquid organic fertilizer, we also provide training in making mosaic pre-works made from eggshell waste to increase the creativity of local residents. The community service activities began with a location survey and interviews with the partners, Giri Mulyo RT 22 residents and teachers of SDN 012 North Balikpapan, which is located in the same location. Next, socialization on recycling eggshell waste into more valuable products was conducted. The activity ended with the residents involved filling out a questionnaire regarding the community satisfaction survey of the activities carried out. The purpose of this activity is to provide knowledge and insight to the community about making liquid organic fertilizer and mosaic artworks from eggshell waste.
Microalgae as A Bioremediation Agent for Palm Oil Mill Effluent: Production of Biomass and High Added Value Compounds Nita Ariestiana Putri; Resti Nurmala Dewi; Rizka Lestari; Rizka Ayu Yuniar; Luluk Majidah Ma'arif; Ricky Erianto
Jurnal Rekayasa Kimia & Lingkungan Vol 18, No 2 (2023): Jurnal Rekayasa Kimia & Lingkungan (December, 2023 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v18i2.34018

Abstract

Palm oil mill effluent (POME) is high strength wastewater obtained from palm fruit processing, which contains high chemical oxygen demand (COD), biological oxygen demand (BOD), and other contaminants. The pollutant load in POME can serve as a source of nutrients for microalgae growth. As a result, the goal of this work was to utilize Spirulina sp. and Nannochloropsis oculata to reduce the nutritional content of POME while producing biomass rich in high-value chemicals. The cultivation was conducted in a batch reactor using various POME fractions (0-20%) under 5,000 lux light intensity and continuous aeration at a temperature of 22-28C and a salinity of 30 ppt for 14 consecutive-days. The results demonstrate that Spirulina sp. produced the most biomass at 15% POME, accounting for 4.670.95 g/L with 0.570.11 1/day of growth rate and 3.33% of COD reduction efficiency. Meanwhile, Nannochloropsis oculata thrived in 20% POME, producing 4.430.36 g/L biomass, 1.180.31 1/day growth rate, and 14.43% COD reduction efficiency. In the proximate analysis. Spirulina sp. and Nannochlorpsis oculata provided 0.87%; 1.11% lipid and 1.03%; 0.86% protein, respectively.
Granulator Performance for Urea Granule Quality: A Study on Material Balance and Recycle Seed Ratio Jefri Pandu Hidayat; Muhammad Azi Kusuma; Nita Ariestiana Putri; Asful Hariyadi
International Journal of Marine Engineering Innovation and Research Vol 10, No 1 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i1.22562

Abstract

Granulation is a critical process in quality of urea fertilizer, particularly their size distribution, significantly affects the product's performance and marketability. Urea synthesis begins with the reaction between ammonia and carbon dioxide, where ammonium carbamate is decomposed to produce urea by granulation process. This research aims evaluate the performance of granulator on urea granule size product quality based on material balance and recycle seed ratio (RSR). The granulator performance in the urea granulation process was evaluated for a production capacity of 3,500 tons/day. The methodology involves data collection from operational records in six days respectively, followed by mass balance analysis and product quality evaluation based on particle size distribution. The analysis revealed a significant deviation between design and actual data. Specifically, the design mass balance indicated a total inlet of 236,726 kg/h and a total outlet of 230,575 kg/h, resulting in a mass deficit of 6,151 kg/h attributed to dust formation and water evaporation. The measured on-size product yield was approximately 98.50% at the outlet, with the desired particle size range of 2–4.75 mm. These findings provide critical insights for process optimization and resource management in urea granulation, emphasizing the need for precise operational control to minimize material losses and ensure product quality compliance with specifications.
Transforming Tofu Waste into a Growth Medium: Boosting Biomass and Proximate Content of Microalgae Nita Ariestiana Putri; Resti Nurmala Dewi; Rizka Ayu Yuniar; Ranti Amanda Mauliasantri
International Journal of Marine Engineering Innovation and Research Vol 9, No 4 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.22009

Abstract

This study explores the potential of tofu waste as a cost-effective alternative growth medium for cultivating Spirulina sp. and Nannochloropsis oculata, addressing the high costs of traditional nutrient media that limit large-scale applications. Despite the nutrient richness of tofu waste, its use as a sustainable growth substrate remains underexplored. This research aims to fill this gap by evaluating the growth performance and nutritional suitability of these microalgae in tofu-based media compared to standard controls. The cultivation process was conducted in a closed photobioreactor system, with harvesting methods including flocculation, centrifugation, and filtration. Results showed that tofu waste media supported biomass production comparable to standard cultivation media, with the highest biomass concentrations recorded at the 20% tofu waste treatment, yielding 0.23 ± 0.05 g L-1 for Spirulina sp. and 0.53 ± 0.2 g L-1 for Nannochloropsis oculata. At this concentration, the final COD levels were 840.84 mg L-1and 825.90 mg L-1, respectively. The lipid and protein contents were 2.44% and 1.71% for Spirulina sp., and 1.21% and 1.50% for Nannochloropsis oculata, respectively. These findings demonstrate that tofu waste can serve as an effective and low-cost growth substrate for Spirulina sp. and Nannochloropsis oculata, promoting circular economy principles within many sectors such as energy, food, and agriculture. This study underscores the potential of waste utilization to enhance the sustainability and economic viability of microalgae cultivation.
Formulating Nutritious Wet Noodles with Spirulina platensis: Exploring Proximate Composition, Antioxidant Activity, and Consumer Preferences Resti Nurmala Dewi; Fenny Crista Anastasia Panjaitan; Sumartini Sumartini; Nita Ariestiana Putri
Eksergi Vol 22 No 1 (2025)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v22i1.13697

Abstract

The incorporation of Spirulina platensis into food products has been extensively explored. In this study, wet noodles were enriched with spirulina at three different concentrations: 1% (P1), 5% (P2) and 10% (P3). Sensory and hedonic evaluations, proximate composition and antioxidant properties were assessed. Overall, formulations P1 and P2 were significantly preferred (p < 0.05) in terms of appearance and aroma compared to the control (P0). Additionally, the texture and taste scores of spirulina-enriched wet noodles were higher (p < 0.05) than those of the control. Among all treatments, P1 emerged as the most favourable formulation (p < 0.05) for aroma, texture, and taste in the hedonic test. Moreover, the spirulina supplementation had significant effect on the protein and fat content (p < 0.05) compared to the control noodles. Furthermore, the antioxidant activity of the spirulina wet noodles increased in a dose dependent manner. The IC50 values for DPPH radical scavenging activity were 339.749 ppm for the control (P0), and 61.473 ppm, 39.965 ppm, and 27.439 ppm for P1, P2, and P3, respectively. These results suggest that fortifying wet noodles with Spirulina platensis not only improves the sensory attributes but also enhances the nutritional quality and functional value.
Ecobrick: Pemanfaatan Limbah Botol Plastik Menjadi Kursi di Lingkungan Damai Bahagia Putri, Nita Ariestiana; Maulana, Ibrahim Bintang; Irsila, Belinda; Rahmawati, Devi Nur; Asenda, Pali Hodia; Zulfiqar, Achmad; Nanda, Muhammad Rahul; Wahab, Mohammad Abdul; Akmal, Naufal
Jurnal SOLMA Vol. 13 No. 2 (2024)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v13i2.15370

Abstract

Pendahuluan: Limbah botol plastik yang terdiri dari karbon, oksigen, dan hidrogen menjadi masalah lingkungan serius karena penggunaannya yang luas dalam pengemasan dan kurangnya upaya daur ulang, menyebabkan penumpukan di TPA. Metode: Program pengabdian masyarakat di Kelurahan Damai Bahagia, Pantai Belakang Bandara, melibatkan 10 warga dengan pendekatan Forum Group Discussion (FGD). Tahapan kegiatan mencakup survei, sosialisasi, pelatihan, pelaksanaan, serta evaluasi dan monitoring. Hasil: Program ini memperkenalkan metode ecobrick sebagai solusi, yang mengubah limbah botol plastik menjadi bahan konstruksi bermanfaat, mengurangi penumpukan sampah di pantai. Kesimpulan: Metode ecobrick berhasil diterapkan, memungkinkan masyarakat mengolah limbah plastik menjadi produk ramah lingkungan dan bernilai ekonomi, sehingga mengurangi dampak negatifnya.
Co-Authors Akmal, Naufal Asenda, Pali Hodia Fenny Crista Anastasia Panjaitan Hariyadi, Asful Irsila, Belinda Jefri Pandu Hidayat Luluk Majidah Ma&#039;arif Lusi Ernawati Maulana, Ibrahim Bintang Muhammad Azi Kusuma Nanda, Muhammad Rahul Rahmawati, Devi Nur Ranti Amanda Mauliasantri Resti Nurmala Dewi Resti Nurmala Dewi Ricky Erianto Rizka Ayu Yuniar Rizka Lestari Sumartini Sumartini Wahab, Mohammad Abdul Zulfiqar, Achmad