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Potential of Neptunia oleracea L. as a Phytoremediation Agent for Petroleum Liquid Waste

Hardestyariki Dwi, Fitria Syarifa

Journal of Ecological Engineering

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2023

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Vol. 24, nr 5

88--94

EN

This present study to determine the potential of Neptunia oleracea as a phytoremediation agent for petroleum liquid waste in terms of various parameters such as physical temperature, and chemical parameters, namely pH, sulfide, and ammonia. Crude oil liquid waste is a hazardous waste if discharged directly into the environment, especially water. In this research, a method of biological treatment of petroleum liquid waste was used by utilizing aquatic plants, namely Neptunia oleracea. Phytoremediation is a way to treat waste that still contains contaminants thus levels can be minimized and even accumulated by various types of plants. This phytoremediation technique uses a simple bioreactor with various concentrations of petroleum liquid waste, namely control (0% waste), 10% waste, 20% waste, and 30% waste. The results of this study can be seen that the Neptunia oleracea plant is able to survive in petroleum liquid waste with a treatment time of approximately 3 weeks. In testing the levels of ammonia and sulfide after treatment showed fluctuating results from week to week. This is a response from Neptunia oleracea which uses these compounds in its metabolic processes. The ability of Neptunia oleracea to reduce sulfide and ammonia levels indicates that this plant can be used as a phytoremediation agent for petroleum liquid waste.

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Effectiveness and Adaptability of Water Hyacinth (Eichornia Crassipes) Mart. Solm in its Role in Reducing COD and BOD Levels in Petroleum Liquid Waste

Hardestyariki Dwi, Fitria Syarifa

Journal of Ecological Engineering

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2022

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Vol. 23, nr 5

26--29

EN

This study aimed to determine the effectiveness and ability of water hyacinth (Eichornia crassipes Mart. Solm) in reducing the COD and BOD levels in petroleum liquid waste. Petroleum liquid waste is one type of waste that pollutes the environment if it is not treated first. In this study, the biological treatment techniques were carried out using the phytoremediation techniques. Phytoremediation is an effort to reduce and improve the quality of waste by using plant agents so that the levels of pollutants contained in the waste can be reduced. The phytoremediation techniques are carried out using a simple bioreactor with various concentrations of petroleum liquid waste, namely control (0% waste), 10% waste, 20% waste, and 30% waste. The results of this study showed that the water hyacinth plant was able to tolerate liquid petroleum waste, which was indicated by the water hyacinth plant being able to survive up to a concentration of 30% for approximately 2 months. On the basis of the measurement of BOD and COD of petroleum liquid waste before phytoremediation was carried out, it was 20 mg/l and 10.04 mg/l, respectively. At 10% effluent concentration, the BOD and COD values decreased to 4.11 mg/l and 14.7 mg/l, respectively. At 20% effluent concentration, the BOD and COD values also showed a decrease to 3.73 mg/l and 9.14 mg/l, respectively. At 30% effluent concentration, the BOD and COD values showed a decrease to 3.73 mg/l and 1.22 mg/l, respectively. The ability of the water hyacinth plant to reduce the BOD and COD values can show its effectiveness to be used as a phytoremediation agent for petroleum waste.

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Efficacy of Dissolved Ozone against Staphylococcus aureus and Bacillus cereus Microorganism

Fitria Syarifa, Sidik Muhammad Abu Bakar, Buntat Zolkafle, Nawawi Zainuddin, Jambak Muhammad Irfan, Kamarudin Nur Nabilah, Musa Fatin Nabilah

Journal of Ecological Engineering

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2019

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Vol. 20, nr 11

76--81

EN

Ozone is a robust antimicrobial agent with numerous potential applications in the industry. Ozone, in either gaseous or aqueous phases is effective against the majority of microorganisms. Relatively low concentrations of ozone and short contact time are sufficient to inactivate bacteria and microorganism. This project investigated the efficacy of dissolved ozone against food-related microorganism. The ozone system was evaluated using the microbial effects on Staphylococcus aureus, and Bacillus cereus and its clinical efficacy against ORP level for disinfection was determined. The results showed that 100% of S. aureus and B. cereus were eliminated by the dissolved ozone in tap water. In conclusion, the dissolved ozone has great efficacy, lower cost and shorter disinfection cycle. Thus, this low temperature, ozone-based disinfection is a green technique and is regarded as one of the most promising disinfection methods.