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All Journal Indonesian Journal of Biotechnology Tropical Aquatic and Soil Pollution Industrial and Domestic Waste Management INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY

Risky Ayu Kristanti

2Dept. of Chemical and Environmental Engineering, Yamanashi University

Author-ID : 444563

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology

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Sustainable Technology in Developed Countries: Waste Municipal Management Hoareau, Carol Emilly; Ahmad, Noraziah; Nuid, Maria; Rubiyatno; Khoi, Dao Nguyen; Kristanti, Risky Ayu
Industrial and Domestic Waste Management Volume 1 - Issue 1 - 2021
Publisher : Tecno Scientifica Publishing

As more studies were conducted and global events unfold, a greater emphasis is being placed on the importance of preserving the Earth's natural resources and cycles before we face a catastrophic climate crisis. Thus, developed countries are constantly adapting their policies and legislation to promote green development for the sake of sustainable development, which benefits both the environment and the socioeconomic segment. As populations grow and living standards improve, more waste is generated. Appropriate municipal waste management is necessary to avoid harm to the environment, wildlife, and human health. Sustainable municipal solid waste management is even included in the United Nations' (UN) Sustainable Development Goals, which aim to improve the world's environment and economy. The European Union (EU) member states' waste management systems can be considered exemplary. In some countries, landfills have been prohibited, promoting the use of more sustainable technologies such as organic waste incineration, recycling, and composting. However, a divide exists between member countries, with some lagging behind in terms of waste management strategies. Thus, this paper examined the current state of municipal waste in EU member states, followed by a review of the various disposal technologies implemented. The difficulties and environmental concerns that must be overcome are discussed, as are the recommendations and possible future directions.

Scenario of Municipal Waste Management in Malaysia Liew, Zachary Raphael; Monir, Minhaj Uddin; Kristanti, Risky Ayu
Industrial and Domestic Waste Management Volume 1 - Issue 1 - 2021
Publisher : Tecno Scientifica Publishing

Malaysia has rapidly modernized, with most of the population now residing in cities and the remainder in rural or remote areas. The amount of municipal solid waste generated has increased in tandem with the country's rapid urbanization in response to that statement. Due to a lack of connectivity in rural areas, there may be insufficient infrastructure for a proper waste management system. As a result, illegal waste dumping was common, and landfills' massive volumes of waste may contribute to greenhouse gas emissions. The Malaysian government has responded by taking the necessary steps to upgrade the country's current waste management system in order to better manage municipal solid waste disposal. This research looks at how energy recovery from accumulated waste can be used as a renewable energy source, as well as the current issues, challenges, and proposed solutions. Methane gas produced as a byproduct of waste decomposition in landfills or disposal sites was used to generate electricity more efficiently and sustainably, resulting in a positive economic and environmental outcome.

Biosorption of Synthetic Dye by Macrofungi Lee, Kek Kin; Kristanti, Risky Ayu; Yulisa, Arma; Rubiyatno; Ningsih, Fitria; Syafrudin, Muhammad; Hernandes, Erika; Albescu, Mihaela
Industrial and Domestic Waste Management Volume 2 - Issue 2 - 2022
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/idwm.v2i2.108

This research project aimed to provide an environmentally friendly method for the decolorization and biosorption of synthetic dye by utilizing fungi as biosorbents. The study was carried out by first growing the fungi in solid medium and then using the fungi as biosorbent to absorb dye in aqueous solution. In the first stage, screening experiments were carried out among 5 different types of fungi, and Pleurotus ostreatus was determined to have the highest growth rate. The Pleurotus ostreatus was recultivated with Remazol Brilliant Blue R dye to determine its dye removal ability. Pleurotus ostreatus sp. exhibited vigorous dye decolorization in agar medium within 2 days. By carrying out batch analysis, 4 parameters were examined, which were the effect of pH, surfactant concentration (Tween 80), salinity concentration and dosage of biosorbent. The results showed that the maximum dye decolourization by Pleurotus ostreatus can be achieved through establishing an acidic condition of pH 2, addition of 0.1mL of Tween 80, 0mg/l of sodium chloride concentration, and dosage of 8 plugs. Lastly, the experimental data was found to fit the Jovanovic Isotherm the most. In conclusion, Pleurotus ostreatus is capable of decolourizing and adsorbing dye particles in the dye aqueous solution.

Microbial Strategies for the Degradation of Organophosphates: A Sustainable Approach to Pollution Control Santiago, Denny Noriel; Mendoza, Rose Ann; Thao, Nguyen Thi Thanh; Kristanti, Risky Ayu
Tropical Aquatic and Soil Pollution Volume 5 - Issue 2 - 2025
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/tasp.v5i2.807

Organophosphates (OPs) were synthetic chemical compounds that had been applied in household products as well as in agricultural and industrial sectors. Although OPs had proven effective, particularly as pesticide ingredients, their persistence in the environment had raised concerns regarding impacts on ecosystems, the environment, and human health. This study addressed the occurrences and negative impacts of OPs, with a primary focus on microbial degradation as a bioremediation strategy. While various degradation methods had been developed, microbial degradation showed strong potential as a sustainable and cost-effective approach. This review aimed to examine the mechanisms, benefits, and limitations of microbial degradation of OPs, thereby addressing the knowledge gap related to its real-world applications. Microbial degradation involved the use of bacteria capable of breaking down OPs through enzyme production, transforming them into less harmful substances. In comparison with chemical or physical methods, microbial degradation was more environmentally friendly, cost-effective, and adaptable to surrounding conditions. By synthesizing findings from previous studies, the report highlighted both the strengths and shortcomings of microbial degradation in mitigating OPs contamination. The findings underscored its promise as a viable solution, while also pointing to the need for further research and improved frameworks.

Microbial Biodegradation of Sunscreen Agents: Mechanisms, Enzymatic Pathways, and Environmental Implications Nurtayeva, Aigerim; Rakhmonov, Jasur; Sarykova, Aizada; Rachana, Kong; Kristanti, Risky Ayu
Tropical Aquatic and Soil Pollution Volume 5 - Issue 2 - 2025
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/tasp.v5i2.824

Environmental contamination from sunscreen ingredients such as oxybenzone and octinoxate has become an increasing concern due to their persistence and toxicity, even at trace concentrations. Continuous sunscreen usage leads to the constant release of these pollutants into the environment, where they can bioaccumulate and resist degradation. The novelty of this review lies in its focused synthesis of recent studies on the microbial and enzymatic degradation mechanisms of sunscreen contaminants, particularly oxybenzone and octinoxate, which exhibit high persistence and bioaccumulative potential. Microbial degradation offers a promising biological approach for the breakdown of these organic pollutants, as microorganisms have demonstrated strong biodegradative capabilities toward various environmental contaminants. This process relies on microbial enzymes that transform or mineralize pollutants into less toxic and simpler compounds. Key enzymes involved include laccase, cytochrome P450, and monooxygenase, which catalyze oxidation, reduction, and hydroxylation reactions. The article further examines these organic pollutants in terms of their persistence, environmental occurrence, degradation mechanisms, and pathways, while also addressing their ecological and health impacts. Moreover, different microbial-based treatment technologies are evaluated, highlighting their respective strengths and limitations. Finally, the review emphasizes the need for continued research into organic pollutant behavior and bioremediation technologies to deepen understanding and mitigate the adverse effects of these contaminants on the environment.

Co-Authors Ahmad, Noraziah Albescu, Mihaela Batubara, Ummi Mardhiah Binhudayb, Faisal Saud Bunrith, Seng Chairattanawat, Chayanee Direstiyani, Lucky Caesar Emre, Mehmet Finayeva, Novlina fitria ningsih Hernandes, Erika Hoareau, Carol Emilly Hossain, Ferdaus Mohd Altaf Jannat, Md Abu Hanifa Kasongo, Joseph Khoi, Dao Nguyen Kumar, Ravinder Kusumadewi, Riana Ayu Lau, Yu Yan Lee, Kek Kin Lie, Michael Liew, Zachary Raphael Maragathavalli, S. Mendoza, Rose Ann Mohamed, Abdelrahim Omar Monir, Minhaj Uddin Mtui, Elias Muhammad Syafrudin Nadifah, Gina Navarro, Ariela Rose Nordin, Ahmad Rizal Roslan Nuid, Maria Nurtayeva, Aigerim Rachana, Kong Rakhmonov, Jasur Retno Wulandari Reyes, Juan Carlos Rose Tirtalistyani Rubiyatno Ruti, Annisa Andarini Safitri, Lisma Santiago, Denny Noriel Sarykova, Aizada Tang, Yien Yu Thao, Nguyen Thi Thanh Tony Hadibarata, Tony Varghese, Diya Merlin Wijaya, Nicholas Albert Wijayanti, Yureana yati, indri Yulisa, Arma

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