JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan

Effectiveness of Calcium Carbonate in Chicken Eggshell as a Copper Adsorbent in Kotagede Silver Craft Liquid Waste

Silmi Aziza Karroghi, Nurjazuli Nurjazuli, Tri Joko — Mon, 01 Jul 2024 00:00:00 +0700

The silver craft industry’s liquid waste contains hazardous heavy metals such as Cu. Waste containing Cu is directly discharged into the environment, harming the environment and living organisms. An alternative treatment for this liquid waste is the adsorption method using activated chicken eggshells, which have a high CaCO3 content as an adsorbent. This study aims to determine the effectiveness of chicken eggshell adsorbents in reducing Cu levels in silver craft liquid waste solutions. The research employs a quasi-experimental method. The dependent variable in this study is the Cu content in the silver craft liquid waste. In contrast, the independent variables are adsorbent particle size with variations of 50 mesh, 100 mesh, and 150 mesh and adsorbent concentrations with variations of 30 g/L, 40 g/L, and 50 g/L. The statistical test used is the General Linear Model (GLM). The results showed that eggshell adsorbents could reduce Cu levels by 80.82% (from 2.671 mg/L to 0.512 mg/L), which occurred in the particle size group of 150 mesh and a concentration of 40 g/L. However, this result has yet to effectively reduce Cu levels below the standard (0.5 mg/L) stipulated by DIY Regional Regulation No. 7 of 2016. Data analysis with the GLM test showed a significant difference in Cu levels based on variations in adsorbent particle size (p-value=0.000) and adsorbent concentration (p-value=0.024). The interaction between particle size and adsorbent concentration did not show a significant difference (p-value=0.810), indicating it did not reduce Cu levels effectively.

Spatial and Temporal Distribution of Water Plant Based on Satellite Imagery and the Effect in Jatiluhur Reservoir

Mon, 01 Jul 2024 00:00:00 +0700

Water vegetation in lakes or reservoirs can change the water's ecology. Water vegetation in Jatiluhur Reservoirs is dominated by water hyacinth (Eichhornia crassipes). Water hyacinth in lakes or reservoirs becomes an invasive weed that can cause ecological degradation. Jatiluhur Reservoir is one of the water bodies affected by the uncontrolled growth of water vegetation. The study was conducted to determine the spatial and temporal distribution patterns of water vegetation and its effect on Jatiluhur Reservoir. Water vegetation's spatial and temporal distribution was analyzed using Sentinel-2A satellite image data. The Normalized Difference Vegetation Index (NDVI) algorithm was used to see the distribution of water vegetation in the reservoir waters. The observations show that the movement of water vegetation starts from the inlet area and then moves along with the flow of water to the center of the reservoir. Finally, it accumulates in the outlet area. The correlation between vegetation cover area and month of observation obtained the equation y=662.5x + 128.1. Based on the equation, the increasing vegetation cover area in the Jatiluhur Reservoir is predicted to reach 128.1 ha per month. The physical method used for controlling the growth and distribution of vegetation (water hyacinth) in Jatiluhur Reservoir by taking in the waters. Efforts to control vegetation physically must notice the increasing rate of water hyacinth distribution.

Analysis of Environmental Management at the Container Terminal of PT Pelabuhan Indonesia (Pelindo) III Semarang

Nirmala Regita Ardiati — Mon, 01 Jul 2024 00:00:00 +0700

This study employs a qualitative approach using a descriptive method. Primary data is obtained through observation, interviews, and documentation, while secondary data is derived from environmental management implementation reports. The data collected is then evaluated for compliance with environmental management regulations, including Law No. 32 of 2009 on Environmental Protection and Management, Government Regulation No. 101 of 2014 on the Management of Hazardous and Toxic Waste Materials, and ISO 14001:2015 on Environmental Management Systems. According to the research findings, environmental management at PT Pelindo III Container Terminal in Semarang is supervised by a certified ecological expert within the HSSE (Health et al.) department. The company manages hazardous liquid waste, air emissions, and hazardous and non-hazardous solid waste. However, non-hazardous liquid waste and dust emissions have not been monitored and managed. The company received a PROPER certification in 2018 and an ISO 14001:2015 certification in 2015 for its environmental management.

Level of Knowledge and Hygiene Practices of Food Handlers and Escherichia Coli Contamination of Food in “B” Catering

Siti Fadilla Nurhasanah, Reni Suhelmi, Yanie Isworo — Mon, 01 Jul 2024 00:00:00 +0700

A food handler is a person who performs food processing activities, ranging from raw materials to food served. Knowledge of food hygiene and the attitude of food stewards will certainly influence sanitary hygiene practices, especially when processing food, resulting in foods not contaminated by physical, chemical, or biological substances. The study aimed to determine the level of knowledge and hygiene practices among food stewards and the presence of Escherichia coli in the food at “B” Catering in Samarinda City. The research method was quantitative with a descriptive approach, a total sampling technique for food handler samples, and then, for food samples, the menu of interest was selected. Results The knowledge level of food stewards was 83.3%, comparable to 13.3%, while less than 3.3% possessed this level of knowledge. Food inspectors who practiced good hygiene accounted for 66.7%, those who practiced sufficient hygiene accounted for 30.0%, and those who practiced less hygiene accounted for 3.3%. Additionally, laboratory tests revealed that food samples in the excellent quality category, with a 0 CFU/gr value, were not contaminated with Escherichia coli. The conclusion of the knowledge level overview, the hygiene practices of food handlers, and the contamination of food by Escherichia coli all yielded positive results.

Sanitary Hygiene Practices and Escherichia coli Contamination in Snack Food at Elementary School Canteens in Nganjuk District

Anika Arum Sari, Nikie Astorina Yunita Dewanti, Nurjazuli Nurjazuli — Mon, 01 Jul 2024 00:00:00 +0700

Snacks served at schools that are contaminated with Escherichia coli germs run the risk of harming students' health. The World Health Organization states that around 70% of diarrheal disease cases are caused by food contaminated with Escherichia coli. Escherichia coli contamination in school snacks can be influenced by a lack of hygiene and sanitation aspects. This investigation aimed to establish a connection between good cleanliness habits and an E. coli infection in the cafeteria food at Nganjuk District's primary schools. This kind of study has an observational design and a cross-sectional study plan. The research sample consisted of 12 canteens selected through purposive sampling. Data collection methods included observation, interviews, and laboratory tests, followed by univariate analysis with descriptive statistics and bivariate analysis with Fisher's exact test. Laboratory test results explained that of the 12 samples, there were 5 (41.7%) foods contaminated with Escherichia coli. The outcomes demonstrated a link between the handler's hygiene (p = 0.015), sanitation of equipment (p = 0.028), serving process (p = 0.010), peddler facilities (p = 0.045), and Escherichia coli contamination. While the quality of food ingredients (p = 0.222) and TPM sanitation (p = 1.000) do not correlate with Escherichia coli contamination, It can be concluded that personal hygiene of the handler, sanitation of tools, serving process, and poor peddling facilities can increase the contamination of hawker food by Escherichia coli bacteria.