The Characteristics of Organic Waste in Hotel Aston Kartika Grogol

A hotel is a property that provides temporary accommodation, food and beverage services to guests with a variety of other facilities. Waste generation from hotels is a equal by organic and inorganic waste, of course efforts are needed to deal with this problem. The purpose of this study was to analyze the composition of organic waste in the form of food loss and food waste and to plan a hotel organic waste. Using 2 variables, namely the composition of the type of organic waste. The composition of the waste used was food loss and food waste. The results of the comparison of composting results with SNI 7763:2018 show that the water content exceeds the quality standard. The conclusion of this research is a 50% organic waste with a recycling potential of 100%. The composition of organic waste at Aston Kartika Grogol Hotel in the form of food loss comes from restaurants, kitchens, and meeting rooms that are put together in kitchen trash bags as much as 13%. For food waste, Aston Kartika Grogol Hotel comes from the rooms, public areas, restaurants, kitchens, and there is waste from meeting rooms which are combined into kitchen waste bags as much as 36% of the total hotel waste

Kajian Komposisi Sampah di Hotel Aston Kartika Grogol Jakarta

In order to reduce the volume of waste at the source, organic waste from restaurants namely food loss and food waste can be treated according to their characteristics. The purpose of the study is to determine the generation and composition of waste at Aston Kartika Hotel through the identification of the source of solid waste and analyze the composition of solid waste from each facility in Aston Kartika Hotel. The methodology of the research is carried out by undertaking the sampling of generation and waste composition in accordance with SNI 19-3964-1994. Aston Kartika Grogol Hotel with the source of solid waste from each facility. The total waste generation of Aston Kartika Grogol Hotel obtained from each facility amounting to 210.84 kg/day and the largest total waste generation of 81.84 kg/day coming from public areas. The largest fraction of waste composition was 35% of food waste and 17% of food loss which contributed organic waste by 52%. The most dominant type of inorganic waste was contributed by plastic waste consisting of types of HDPE, PVC, LDPE, PP, PES and PET. The composition of solid waste in Aston Hotel showed that 88% of hotel waste was suitable for recycling, while 12% of the total hotel waste was not suitable for recycling

Increasing Effectiveness of Heavy Metal Sorption by Biosorbent Microalgae Beads

This research was conducted to overcome the Cu2+ heavy metal pollution in the environment through a biotechnological approach with heavy metal sorption process by microalgae beads. Biosorbent in form of beads was produced from Chlorella sorokiniana, Monoraphidium sp., and Scenedesmus obliquus tropical microalgae mobilized with Naalginate polymer. The sorption process is observed on a controlled batch culture with variations of temperature (25, 35, and 45 °C), and observation periods (200th, 220th, 250th, 270th min) as contact time. The absorption efficiency on each temperature variation reaches more than 90%, but the highest absorption efficiency rate is at 92.20% on 35 °C temperature and 200 minutes of contact time. Biosorbent beads with 2–3 mm of diameters show the best sorption ability than the 3–4 mm and 4–5 mm ones. Sorption process is also evident with the existence of intensity alteration on amide, ketone, and sulfhydryl function groups which were consistently weakened until the end of the sorption process. The beads utilized in this research are potentially reusable as biosorbent. Thus, further examination is required to acknowledge the maximum reutilization rate of the beads as biosorbent on heavy metal absorption process

Acid Mine Drainage Neutralization Effort in Mud Media by Lactobacillus casei Bacteria and Dekkera bruxellensis Fungi

Mine Acid Drainage (MAD) is a primary environmental problem caused by mining activity. The main charac-teristics of MAD are extremely low pH level (1.5-4.0) and contains sulphate and a number of heavy metal and metalloid that can destroy vegetation, accelerate erotion, and disrupt land ecosystem balance. The objective of this research is to process MAD by improving pH level and lowering iron and manganese content in MAD by Lactobacillus casei and Dekkera bruxellensis mixed culture. MAD Neutralization test was conducted on SMSs media with MAD concentration variations of 10, 15, 20 and 25 (%;v/v), and contact time variations of 48, 96, 144, and 192 (hours). The MAD neutralization test by Lactobacillus casei and Dekkera bruxellensis mixed culture occurred best at 10% concentration (v/v) with contact time of 96 hours. The pH improvement up to 6.20 with Iron metal efficiency removal at 32.47% and manganese metal up to 24.94%. MAD neutralization test revealed that the best contact time variation is at 96 hours. At this contact time, the pH level was increased to 6.17 with iron metal removal efficiency at 31.17% and manganese metal removal at 25.43%