scholarly journals The First Investigation of Microplastics Contamination in Estuarine Located in Puger District, Jember Regency, Indonesia

2021 ◽  
Vol 3 (1) ◽  
pp. 7
Author(s):  
Selvi Ariyunita ◽  
Yeny Dhokhikah ◽  
Wachju Subchan
Keyword(s):  
Stainless Steel ◽  
Local Government ◽  
Aquatic Ecosystem ◽  
Actual Condition ◽  
Water Pump ◽  
Fish Processing ◽  
Plastic Pollution ◽  
Fish Market ◽  
Sample Water ◽  
Filter Mesh

Microplastics are harmful to the ecosystem and need to solve immediately. Detection of microplastic contamination is the first step to reduce plastics pollution. Estuarine in Puger has a high potential for microplastic pollution related to the multifunction of waters as ports, tourism, fish market, fish processing, and human settlements. However, there are no studies related to microplastic contamination in the area. The objectives of this research were to determine microplastic contamination in the estuarine located in Puger District, Jember Regency, Indonesia. The research results were the first evidence to inform the society and local government about the actual condition of plastic pollution, especially in the aquatic ecosystem. The sampling sites were determined by purposive sampling. Fifty liters of water from each station (with three repetitions) were taken using a 24V water pump and then filtered using stainless steel filter (mesh 5 mm and 0.2 mm). The filtered samples were placed in a sterile bottle sample, stored at 4 ± 20C. Microplastics were counted and categorized according to size, color, and type under a microscope stereo. Microplastic abundance was calculated based on the number of microplastic particles identified per liter of sample water (particle/liter). The result showed that the study area was contaminated by microplastics throughout site sampling, with abundances varying from 0.03 particles/liter to 0.19 particles/liter. The highest microplastic abundance found near the fishery market. The microplastics also vary in size, color, and type. According to characterization, the sources of microplastic contamination come from human-based activities.

scholarly journals Environmentally friendly fish processing center in Muara Angke, Jakarta

2021 ◽  
Vol 878 (1) ◽  
pp. 012041
Author(s):  
B R Condro ◽  
U Siahaan
Keyword(s):  
Spatial Planning ◽  
Pelagic Fish ◽  
Fish Processing ◽  
Business Growth ◽  
Fish Market ◽  
The World ◽  
Marine Products ◽  
Marine Product ◽  
Maritime Infrastructure ◽  
World Maritime

Abstract Indonesia is the largest maritime country in the world with two thirds of its territory consisting of territorial waters. Indonesia ha more than 17,000 islands, around 5.8 million km2 of sea, and 81,000 km length of coast. Indonesia Ocean is quite extensive and the sea products are quite diverse. Samudera Indonesia produces many types of shrimp, large pelagic fish (Tuna, Sharks, etc.), with a production of 1,076,890.00 tons / year. To realize the vision of the World Maritime Axis, several things must be considered, namely, sea spatial planning and maritime infrastructure and connectivity development. To support this government plan, the author wants to develop the Muara Angke Fish Market, which is the Center for Marine Products Processing at Muara Angke with the Waterfront Themes Approach. Muara angke is a fairly large supplier of marine products in Jakarta. The sea products come not only from the catch of local fishermen, but also from other regional fishermen. Muara angke has become a center for marine product trade, therefore the development of sea product processing has been able to encourage investment and business growth in the field of marine, diverse marine products and diverse processing capable of making Muara Angke as the Center for Processing of Marine Products. Its location on the edge of the sea is also a potential for the application of the Waterfront theme.

scholarly journals Failure Analysis of Shaft Circulating Water Pump (CWP) used in Power Plant

2018 ◽  
Vol 159 ◽  
pp. 02027 ◽  
Author(s):  
Abdul Hamid ◽  
Sri Nugroho ◽  
Gunawan Dwi Haryadi ◽  
Khaeroman
Keyword(s):  
Stainless Steel ◽  
Chemical Composition ◽  
Power Plant ◽  
Failure Analysis ◽  
Fatigue Cracking ◽  
Hardness Test ◽  
Water Pump ◽  
Circulating Water ◽  
Pump Shaft ◽  
Sem Test

Pump shafts are generally exposed to the liquid being pumped either on a continual basis or at certain locations along the length of the shaft. The shaft material is austenitic stainless steel, description ASTM AU 79 TY 316. The purpose of this study is to determine the failure of the water pump shaft used in the power plant. Metallography is the study of structure metal shaft can used as a means for CWP metal pelleting (Circulating Water Pump), for the purpose of damaged or deeply degraded areas. SEM test is used to know the beginning of the crack (crack initiation). EDS test is used to chemical composition and Vikers hardness test is also used to know the hardness material. These three tests to support in analyzing the failure of the pump shaft. The conclusion of this failure analysis is the shaft material has porosity. Fatigue cracking comes from the outer surface area.

Study on Prediction Model and Experiments of High-Speed Milling Force for Stainless Steel 316

2010 ◽  
Vol 33 ◽  
pp. 6-10
Author(s):  
Wei Feng Zheng ◽  
Jing Quan Wu ◽  
Can Liu ◽  
Guang Hui Li ◽  
Guang Yu Tan
Keyword(s):  
Stainless Steel ◽  
High Speed ◽  
Significant Degree ◽  
Actual Condition ◽  
Linear Regression Method ◽  
Milling Force ◽  
High Speed Milling ◽  
Stainless Steel 316 ◽  
Milling Forces ◽  
Selection Of

Through the orthogonal test in which stainless steel 316 was milled with high speed by solid cemented carbide end cutter, the milling force was measured. By multiple linear regression method, the prediction formula of the milling forces of stainless steel 316 was found. In addition, this study validates to significant degree of the formula meeting the actual condition, which can provide a reference to better selection of cutting parameter in advance and the design of high-speed milling cutter.

Economic analysis of fish processing and marketing in Ogun Waterside Local Government, Ogun State, Nigeria

2015 ◽  
Vol 42 (2) ◽  
pp. 235-245
Author(s):  
O. J. Olaoye ◽  
D. A. Adegbite ◽  
E. O. Oluwalana ◽  
S. S. Ashley- Dejo ◽  
O. A. Adelaja ◽  
...  
Keyword(s):  
Local Government ◽  
Economic Analysis ◽  
Bank Loan ◽  
Primary Data ◽  
Small Scale ◽  
Cost Ratio ◽  
Fish Processing ◽  
Gross Margin ◽  
Single Digit ◽  
Ogun State

This study examined the economic analysis of fish processing and marketing in Ogun Waterside Local Government Area of Ogun State, Nigeria using structured, validated and pre-tested interview schedules to collect primary data from one hundred and thirteen respondents. Descriptive analysis was used to analyze the socio-economic characteristics, access to productive resources and constraints faced by fish processors while budgetary analysis was used to determine profitability. The result reveals that 99.0% of the respondents were females, 57.4% were within their active economic age group (41 - 50 years), about 50.0% were educated and 82.3% were married. The scale of operation was on small scale level. The result of the budgetary analysis show that average total cost of N53,530.08 was incurred, average total revenue of N58,340.71 was realized and a returning gross margin of N37,088.44. The profitability ratio gave a benefit-cost ratio of 1.089 and expense structure ratio of 0.0603. This is an indication that fish processing business is profitable and viable in the study area. Despite the high profitability of the business, fish processors identified lack of collateral security for bank loan (96.5%), erratic power supply (92.0%) and lack of modern fish processing facilities (43.4%) as their most prevailing problems. With this high level of profitability and viability in fish processing and marketing, it is recommended that Government, cooperative societies, private bodies and non-governmental organizations should provide basic amenities such as storage facilities, electricity, transportation facilities and modern fish processing facilities in other to boost fish production in Nigeria as well as single digit Bank loan with civil servants as guarantors as means of collateral security.

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