Genbinesia Journal of Biology

Types of waste identification in Perintis Lake as an ecotourism conservation efforts Bone Bolango District, Gorontalo Province

Danial Mohamad, Syahrul Lanti — Sat, 30 Nov 2024 00:00:00 +0700

Perintis Lake is a lake area with potential for ecotourism. However, as activities progress, some areas have become littered with garbage. Therefore, the purpose of this study focuses on identifying the types of waste and determining the most common types of waste in the Perintis Lake area. This study uses a quantitative descriptive research method by identifying the types of waste scattered in the lake area using a sampling method categorized based on the size characteristics of mega-debris (>1 m), macro-debris (2.5 cm–1 m), meso-debris (5 mm–2.5 cm), and micro-debris (0.33 mm–5 mm). Based on the research activities, the sample collections locations are in two different transect areas, namely the Perintis Lake tourist area and the lake area directly facing residential areas. The total identification results obtained from both transects consist of 266 types of waste in five different categories: plastic waste, rubber, metal, glass, wood, and derivatives. Among the findings, plastic waste is the most dominant type of waste in the lake area, totalling 218 types. Furthermore, in terms of waste characterization based on size, macro-debris is the most abundant category in the lake area, particularly plastic waste, with a total of 168. The abundance of plastic waste in the research location is influenced by indiscriminate disposal by visitors to the environment and also by household activities directly facing the Perintis Lake area, resulting in an increasing spread of waste distribution over time.

The effect of different light colors on the growth of Nannochloropsis sp.

Nurul Istiqomah, Alis Mukhlis, Zaenal Abidin — Sat, 30 Nov 2024 00:00:00 +0700

The purpose of this study was to determine the effect of different light colours on population density, relative growth and self-replication time in Nannochloropsis sp. This study used a completely randomized design experiment involving 5 treatments and 4 replications. Treatment A uses red light, treatment B uses yellow light, treatment C uses green light, treatment D uses blue light, and treatment E uses white light. Density observations were made every 36 hours. The results of the study showed that differences in the colour of light had a significant effect on population density and relative growth of Nannochloropsis sp. but no significant effect on self-replication time.

Broodstock maintenance technique of koi fish (Cyprinus rubrofuscus, Lacepede 1803) at the Center Fisheries of Freshwater Aquaculture, Sukabumi, West Java

Nafila Junia Azadia, Kismiyati Kismiyati — Sat, 30 Nov 2024 00:00:00 +0700

Koi fish (Cyprinus rubrofuscus) is an ornamental fish that has a beautiful body shape and color so it has high economic value. Good maintenance of koi fish parents will produce superior koi fish seeds. The aim of this research is to find out the techniques for raising parent koi fish from preparation to spawning and to find out the problems faced and how to handle them. The methods used in this research are active participation, observation and interviews. The parameters observed include fecundity, FR, HR, and water quality (temperature, pH, and DO). The data obtained from the research was then analyzed descriptively. Based on research that has been carried out, the highest fecundity, FR and HR data obtained during 2 consecutive spawning were 60,480 eggs, 95.8% and 100%. Spawning was carried out semi-artificially using the GnRH hormone with a ratio of the parent's body weight male and female 1:1. The average water quality results measured include a temperature of 23.8 ℃, pH 6.7, and DO 3.2 and are included in optimal conditions for rearing parent koi fish.

The The potential of meat boiling water waste on plants: A systematic literature review

Syeni Erviana, Achmad Ali Fikri — Sat, 30 Nov 2024 00:00:00 +0700

Boiling water waste from meat is often considered as useless waste, whereas it can be utilized as a potential source to support plant growth. The aim of this research is to identify the potential of meat boiling water waste as a nutrient source for plants, as well as to evaluate its impact on plant growth and soil quality. This study was conducted using a systematic literature review method, which involved the collection and analysis of various previous studies relevant to the researched topic. Through this literature review, it was found that meat boiling water contains essential nutrients such as nitrogen, phosphorus, potassium, and micronutrients that can enhance soil fertility and support plant growth. The research results indicate that the use of meat boiling water can contribute to plant growth, although there are potential negative impacts such as microbial contamination, nutrient excess or fat deposition if not managed properly. This research is expected to serve as an alternative organic fertilizer that can support sustainable agriculture, provided that it is managed correctly and considers risk factors. These findings provide new insights into waste management in the agricultural sector, with the hope of reducing dependence on chemical fertilizers and providing environmentally friendly solutions. In conclusion, meat boiling water waste has the potential to be a useful nutrient source for plants; however, careful management is required to minimize its negative impacts. Further research is needed to optimize the use of this waste in sustainable agriculture.

Utilization sugarcane waste (Saccarhum officinarum L.) as a bioetanol basic material through a bioprocess engineering approach based microbes

Sat, 30 Nov 2024 00:00:00 +0700

Sugarcane (Saccharum officinarum L.) is a plant that is able to produce a lot of sugar content in its stem organs. The amount of sugar production from sugar cane, of course, produces and leaves bagasse waste. A number of studies have shown that bagasse waste still contains a lot of important materials, one of which contains lignocellulose substrates that have the potential to be converted into bioethanol raw materials. The purpose of this study is to determine, see and assess the production of bioethanol produced by utilizing sugarcane waste as raw material through a microbial-based bioprocess engineering approach. This research is an experimental type with the treatment of free cells and immobilized cells in bioethanol production by utilizing sugarcane waste as raw material with the stages of processing waste into flour, dried, hydrolyzed, and analyzed sugar content before ethanol production test. Based on the results of research on ethanol testing using free cells, the highest alcohol content was obtained at a concentration of 3% and 4%. For the test of ethanol content using immobilized cells, the highest ethanol content was obtained at a concentration of 4%.