A S Putri¹, S Najah¹, A N Lathifah^[1],3*, A A Asmara^1,2, D Wulandari^1,3

 

¹ Environmental Engineering Department, Universitas Islam Indonesia, Yogyakarta 55584, Indonesia

² Center for Environmental Studies, Universitas Islam Indonesia, Yogyakarta 55584, Indonesia

³ Environmental Biotechnology Laboratory, Universitas Islam Indonesia, Yogyakarta 55584, Indonesia

^[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art44

 

ABSTRACT

Research on the bacteria and fungi potentially degrading microplastic in Piyungan Landfill has not been done much. Meanwhile, plastic pollution is one of many environmental problems faced in the Special Region of Yogyakarta. The accumulation of plastic waste is getting more significant daily, and the capacity of landfills is decreasing. Bacterial and fungal testing was carried out by taking soil samples from landfills and isolating dilute Nutrient Broth, Malt Extract Agar, and Nutrient Agar media. Bacterial and fungal were identified by morphology colony and cell, then tested for plastic biodegradation by selected bacterial and fungal. The result of this research, there are 18 bacterial isolate and five isolate fungi, but for the degradation testing, chosen just three bacterial (Isolate A, F, J) degrade Polypropylene for ±30 days and three fungal (Isolate PA, PK, RJ) to degrade LDPE for ±14 days. The indicator for determining plastic degradation is clear-zone formation. The test result showed that isolate F, which had similarity with bacteria in the genus of Micrococcus, had a higher potential to degrade microplastic with clear-zone formation ±1.23 mm. Meanwhile, fungal isolate PK, similar to Penicillium sp., had a higher potential to degrade microplastic, marked by the most significant clear-zone appearance, ±2.3 cm.

 

Keywords: Indigenous Microbes, Piyungan landfill, Microplastic biodegradation

 

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Fajriyanto^[1]* and H Budiman¹

 

¹ Department of Architecture Engineering, Faculty of Civil and Environmental Engineering, Indonesian Islamic University, Indonesia

^[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art42

 

ABSTRACT

Gajah Wong River is one of the rivers that cross the city of Yogyakarta in the east which is in critical condition. The use of land on the riverbank for settlements continues without regard to environmental aspects. The density of the population and buildings is not under the area’s capacity. Riverbank damage occurred in several riverbank areas. Ecological architecture is a holistic design approach, eco-friendly design, and optimizing the utilization of natural potential. This study aims to make the concept of redesigning the Gajah Wong riverbank settlement based on ecological architecture. The analysis was carried out using three approaches: interpretational analysis, structural analysis, and reflective analysis. The results of the study show that the basic problems of the Gajah Wong riverbank can be grouped into the settlement, socio-economic and environmental aspects. The concept of redesigning riverbank settlements based on ecological architecture can be applied by optimizing the use of natural resources, designs that respond to site characteristics, working with climate to get energy efficient, and designs that respond to residents’ needs.

 

Keywords: Redesign, Riverbank settlement, Eco-architecture

 

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M Rahnuma^[1]*, M M H Chowdhury², T R Ferdousi³, A Ahmed⁴, and N Ahmed⁵

 

¹Department of Civil Engineering, Rajshahi University of Engineering and Technology, Rajshahi, Bangladesh 6204.

²Department of Civil Engineering, Sylhet Engineering College, Sylhet, Bangladesh 3100

³Department of Civil Engineering, Chittagong University of Engineering and Technology, Chittagong, Bangladesh 4349

⁴Brown University, Providence, Rhode Island, USA 02912.

⁵Researcher, National Nanotechnology Research Center, Bilkent University, Ankara, Turkey.

[1]^* Corresponding author: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art40

 

ABSTRACT

Over the last few decades, significant damages have been observed in our environment. Being a densely populated country, Bangladesh has also faced significant environmental challenges over the last couple of years. To understand the pattern, researchers have analyzed land coverages in several parts of the world. This study presents an analytical study of the land coverages and land transition maps of the Rajshahi City located in Bangladesh. Our study was focused on the 1990,1998,2007,2014, and 2021 years. The maps were generated using ArcGIS 10.8 software. From our results, we observed that there was significant vegetation loss in the selected region over the years. The reduction in vegetation area is determined by a trend line of 0.8291% per year starting from 1990. Previous studies have shown that trees absorb the pollutants from the air and make the air cleaner. In this study, several graphs showing the decreasing rate of the absorption of air pollutants due to decreasing rate of vegetation are manifested. The increasing rate of air pollutants causes several life-threatening diseases and contributes to the rising temperature. To cope with this vegetation loss, we have proposed a partial solution that is rooftop gardening which supports Urban planning management with greenery.

 

Keywords: Vegetation; Remote sensing; Air pollutants; Rooftop gardening.

 

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