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Nusantara Science and Technology Proceedings
Published by Future Science
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Articles 52 Documents
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Search results for , issue "2nd International Conference Eco-Innovation in Science, Engineering, and Technology" : 52 Documents clear
Analysis Effect of Butyrate Addition on Butanol Production by PVA-Immobilized Clostridium acetobutylicum ATCC 824 in Batch Culture Fermentation Atika Nandini; Wei-Yu Chou; Dilirani Nagarajan; Jo-Shu Chang
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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Abstract

The cultivation of PVA-immobilized Clostridium acetobutylicum ATCC 824 in CRM medium including 60 g/L of glucose as a carbon source was used to produce butanol. The addition of various butyrate concentrations was analyzed to stimulate metabolic pathways toward butanol production. Anaerobic incubation conditions were maintained at a temperature of 37°C for 24-36 h. The A-B-E batch fermentation was performed at the optimum condition as follows: temperature of 37°C, the glucose concentration of 60 g/L, and pH of 4.5 (controlled). The highest butanol production of 14.94 g/L was achieved with butyrare addition of 2.5 g/L, and the highest butanol yield of 0.61 mol butanol/mol glucose was achieved at the addition of 5 g/L. The experimental result showed that butanol production and yield increase when the addition of butyrare is less than 5 g/L. Despite that, with further higher butyrare concentration, butanol production decreases accompanied by decreased glucose consumption. The lowest butanol production of 11.74 g/L was obtained at the addition of 7.5 g/L butyrare.
Brief Overview of Perovskite Oxide: Synthesis and Its Performance as Oxygen Separator from Air Silvana Dwi Nurherdiana; Rachmad Ramadhan Yogaswara; Nove Kartika Erliyanti; Atika Nandini; Mutasim Billah; Sintha Soraya Santi; Hamzah Fansuri; Mohd Hafiz Dzarfan Othman; Yuly Kusumawati; Syafsir Akhlus
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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The aims of this brief overview are providing the knowledge about the physical and chemical properties of perovskite oxides in various synthesis method and the correlation of its performance for separating oxygen from air. Perovskite oxide showed excellent conductor of ion and electron, simultaneously through oxygen lattice in the crystal structure. In the present review, we have presented the detail on the crystal structure and the factor that affect the pseudo-crystal, various synthesis method i.e., solid-state, sol-gel, combustion, and co-precipitation. It has been completed with the discussion of the characteristic and the mechanism of the perovskite to separate oxygen from air
Shelf-life Prediction of Soneca Using Accelerated Shelf-life Tests Approach to Critical Water Levels Jariyah; Shafira Suci Utami; Ni Ketut Sari; Kusuma Wardhani Mas’udah
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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Shelf life is information that must be included in food product packaging. Estimated shelf life of food products can be done conventionally (Extended Storage Studies) and acceleration (Accelerate Shelflife Testing). Estimation of shelf life by ASLT can be done using the critical moisture content approach, especially for products easily damaged by water absorption. The purpose of this study was to determine the shelf life of Soneca biscuits packaged using three different packages, namely Polypropylene (pp) plastic packaging, Metalized Plastic, and Aluminum foil. The method of determining the shelf life used in this study uses the ASLT method with a critical moisture content approach. Based on the research, it is known that the critical moisture content of biscuits is obtained when the product moisture content reaches 0.0812 (g H2O/g). The isothermic sorption curve of the biscuits obtained can be appropriately expressed using the Hasley model equation. Estimation of shelf life was carried out under storage conditions at 30 oC and 75% RH. The study results show that the predicted shelf life of biscuits with metalized plastic VM-PET packaging is 17.76 months, with aluminum foil packaging is 19.85 months and using PP plastic packaging is 1.72 months. Therefore, it is known that the best shelf life is the use of aluminum foil packaging.
Performance of Microalgae Chlorella sp. to Remove Phosphate in Domestic Wastewater Using Oxidation Ditch Algae Reactor (ODAR) Jihan Ilvi Nurdiana; Ana Mauidatul Khasanah; Euis Nurul Hidayah; Naniek Ratni Juliardi A.R
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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Domestic wastewater contains high organic and inorganic materials. One alternative treatment that can be used is to use Oxidation Ditch Algae Reactor with microalgae Chlorella sp. The reactor is expected to reduce the concentration of phosphate in domestic wastewater. This study aims to determine the effectiveness and role of microalgae Chlorella sp in degrading phosphate in domestic wastewater. The variations used in this study were variations in the ratio of the volume of waste to microalgae (1: 0 and 1:2) and variations in conditions (oxic and oxic-anoxic). This research was conducted for five days each time running. The optimum yield of phosphate removal occurred under oxic-anoxic conditions with a volume ratio variation of 1:2, which was 78.81%. This study indicates that the microalgae Chlorella sp is effective for removing phosphate in domestic wastewater.
Performance of Mircoalgae Spirulina platensis in Oxidation Ditch Algae Reactor to Remove Nitrate in Domestic Wastewater Nadiya Kamilalita; Euis Nurul Hidayah; Yayok Surya Purnomo
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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The high nitrate content in domestic wastewater can cause problems for the environment. Improved quality of processed wastewater can use biological treatment with oxidation ditch combined with microalgae Spirulina platensis. The growth process of Spirulina platensis requires nutrients such as nitrates. In the study, variations in aeration conditions (continuous aeration and intermittent aeration) were conducted to create anoxic conditions in oxidation ditch algae reactors. Observations were made for 5 days with the aeration process using a brush aerator rotation speed of 60 rpm. The results showed that the microalgae Spirulina platensis has the potential to be effective in degrading nitrate concentrations in domestic wastewater. In addition, intermittent aeration has a significant effect on nitrate degradation in domestic wastewater. This is indicated by a decrease in nitrate with a percentage removal of 73.71% from the initial nitrate concentration of 5.82 mg/l to 1.53 mg/l during intermittent aeration.
Characterization of Effluent Organic Matter (EfOM) in Domestic Wastewater Using Oxidation Ditch Algae Reactor (ODAR) with Microalgae Spirulina platensis Imaniar Ramadhani; Mochammad Shaifullah Indrawanto; Euis Nurul Hidayah; Okik Hendriyanto Cahyonugroho
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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Oxidation ditch (OD) is a tub used to treat wastewater by utilizing oxygen and microorganisms contained in it to determine its ability to reduce the release of organic substances. Oxidation Ditch Algae Reactor (ODAR) is a biological wastewater treatment that utilizes the symbiosis between algae and bacteria in water. The results of biological processes contain organic material called effluent organic matter (EfOM). This research aims to investigate the characterization of effluent organic matter (EfOM) produced from the Oxidation ditch (OD) process with and without algae both in continuous aeration (oxic) and intermittent aeration (oxic-anoxic) conditions in domestic household wastewater and microalgae Spirulina platensis. Characterizing effluent organic matter (EfOM) is a crucial thing to understand its ability to treat wastewater. Based on the analysis results, the characterization of effluent organic matter (EfOM) in the oxidation ditch process using an algae ratio of 1:1 in continuous aeration (oxic) conditions through the UV254 test was identified as containing the highest aromatic organic matter up to 59.68%. Meanwhile, without using algae with a 1:0 ratio of intermittent aeration (oxic-anoxic) conditions, the lowest decrease in aromatic organic matter content reached 34.79%.
Langmuir and Freundlich Isotherm Approximation on Adsorption Mechanism of Chrome Waste by Using Tofu Dregs Dyah Suci Perwitasari; Yahya Ardian Yuma Pracesa; Muhammad Aji Pangestu; Pardi Sampe Tola
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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The requirement to discover low-cost and high-efficiency adsorbents material for the heavy metal removal of industrial effluents has been growing attention for many environmental researchers. Natural materials are being studied intensively as adsorbent materials because of their abundant source, low-cost processing, and relatively high adsorption efficiency. This study investigates the tofu dregs as adsorbents material to remove chrome metal, the main element in tannery liquid waste. Analysis of experimental data from adsorption processes is crucial to understand and predict removal mechanisms, efficiency, or required adsorbent mass under given initial conditions. Langmuir and Freundlich's adsorption isotherms were applied to the experimental data to determine their intrinsic parameters. The intrinsic parameters of Langmuir and Freundlich adsorption isotherms can subsequently be used to analyze the adsorption mechanism. This was achieved by combining the isotherms equation with mass conservation of solute before and after adsorption
Characterization of the Effluent Organic Matter (EfOM) from the Domestic Wastewater Treated using Oxidation ditch and Microalgae Chlorella sp. Emira Aulia Rachma; Euis Nurul Hidayah; Yuliatin Ali Syamsiah; Hirsandy Rachmadhany Alamsyah
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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Many advantages are obtained in treatment using microalgae. Microalgae treatment using an oxidation ditch can remove organic matter in wastewater. On the other side, the wastewater treatment using microalgae with oxidation ditch algae reactor (ODAR) to reduce organic matter also produces by-products that are harmful if dissolved in water. Processing in ODAR has Effluent Organic Matter (EfOM) and Algae Organic Matter (AOM) which are by-products of the microalgae process. The content of these compounds can lead to the formation of DBPs in water. This research was conducted on control variation (without microalgae) and variation of the volume of waste and microalgae 1:3, with oxic and oxic-anoxic conditions. Spectroscopy FTIR test is used to determine the organic matter contained through its functional groups. In the oxic-anoxic control variation, the FTIR percentage increased to 46.63% on the fifth day. In control oxic variation, it decreased to 46.12%. Meanwhile, in the oxic-anoxic 1:3 variation, the percentage decreased on the fifth day to 46.39%, and in oxic conditions, the rate was 46.8%. From the results obtained, the addition of microalgae can increase the content of organic matter in processing due to the by-products produced by microalgae and bacteria in processing.
Kinetic of Microalgae Chlorella sp. in Domestic Waste Treatment Using Oxidation Ditch Algae Reactor (ODAR) Nabilla Candrahanifa; Nicken Elok Arohmah; Euis Nurul Hidayah; Okik Hendrianto Cahyonugroho
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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Chlorella sp is a species of green algae that can’t have the ability to move. Chlorella sp is a biofilter that removes nutrients and pollutants in wastewater. Chlorella sp also functions as a catalyst in the photosynthesis process, because there is a lot of chlorophyll. In this research, domestic waste was used as an experimental medium. Before running the oxidation ditch reactor, microalgae cultivation was carried out to increase the number of microalgae needed for research. Then the microalgae acclimatization was carried out to determine the maximum acceptable limit for the microalgae Chlorella sp. The oxidation ditch reactor has a capacity of 250 liters and is used in conditions of 60 rpm oxic and 60 rpm oxic-anoxic, and sampling is carried out every day for 5 days. This research was conducted to determine the role and effectiveness of Chlorella Sp. in degrading NO3- and PO43- content in domestic wastewater treatment. From the research results, it can be seen that the microalgae Chlorella Sp. was able to remove the maximum nitrate of 81,96% with an initial nitrate 5,82 mg/L to 1,05 mg/L. In addition, the microalgae Chlorella Sp. was also able to remove maximum phosphate of 82,09% with an initial phosphate value of 2,72 mg/L to 0,6 mg/L.
Pneumatic Coagulation-Flocculation on Domestic Wastewater Treatment Azzahra Hanggararas Sasdika; Khusnul Khotimah Ayuningtiyas; Aulia Ulfah Farahdiba; Ayu Putri Sahitamara
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
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Activities carried out in the household produce waste called Domestic Waste. Wastewater samples were taken from Penjaringan Sari Flats, Surabaya, East Java. This research is based on a literature study, namely by collecting data from previous studies. The purpose of this study was to determine the effect of the pneumatic coagulation-flocculation method for domestic wastewater treatment. After testing the characteristics of the water sample, it was found that several parameters had values ??determined by the quality standard. From this research, it is obtained. The results showed that the pneumatic coagulation system was more effective in reducing the organic load compared to mechanical and hydraulic coagulation.

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