Investigation of ballast water quality in onne harbor-physiochemical assessment

International Journal of Environmental Science and Technology, Год журнала: 2023, Номер 20(12), С. 13799 - 13808

Опубликована: Июнь 12, 2023

Язык: Английский

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Ballast Water Problem: Current Status and Expected Challenges

Marine Science and Technology Bulletin, Год журнала: 2022, Номер 11(4), С. 397 - 415

Опубликована: Дек. 22, 2022

Transporting non-native species in ballast tanks has been a major challenge over the years. The number of surviving host environment is quite small compared to those all introduced. However, even single can cause great harm environment, economy, and public health. Ballast water treatment issues are difficult complex as performance highly affected by variable characteristics seawater. In addition, targeted organisms wide spectrum. International Convention on Control Management Ship Water Sediments requires ships manage with Type Approved System compliance discharge standard defined Convention. Systems Approval (G8) Guide was revised 2016 accepted BWMS Code (Ballast Code) mandatory regime 2018. According implementation schedule this approval regime, management system installed or after 28 October 2020 must be type-approved according IMO’s G8 requirements. Several systems use different methods their limitations. problem does not seem end only installation ships. Although substantial international progress made (both technically regulatory), there still several regarding effectiveness, monitoring, environment.

Язык: Английский

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Performance of Intermittent Slow Sand Filter Processing Units in Treating Food Court Wastewater

Journal of Ecological Engineering, Год журнала: 2023, Номер 24(4), С. 117 - 139

Опубликована: Фев. 24, 2023

This study aimed to determine the performance of modified slow sand filter (SSF) media with blood clam shells (Anadara granosa) and activated carbon remove turbidity, TSS, TDS, FOG on food court wastewater.The concentration water pollutant parameters processed by SSF was determined based Indonesia quality standards, as well knowing optimum operational intermittent Response Surface Methodology (RSM).The research data using Optimal type (custom) design which consisted independent factors including media, addition bacteria grease trap pre-treatment unit, running time, response in form effectiveness removing FOG.The reactor operated intermittently (48 hours) for a maximum 22 days calculated Standard Methods.The results Analysis Variance (ANOVA, p<0.05) 2FI model showed that there significant effect all parameters.The most optimal were achieved Bacillus sp. unit amount much 1%, detention time 4 days, turbidity reaching 39.53%; TSS 45.25%; TDS 19.30%; 61.35%.

Язык: Английский

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Toxicity evaluation of chlorinated natural water using Photobacterium phosphoreum: Implications for ballast water management

Journal of Environmental Management, Год журнала: 2023, Номер 335, С. 117471 - 117471

Опубликована: Фев. 28, 2023

Язык: Английский

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Systematic Considerations for a Ballast Water Treatment System (BWTS) Retrofits: A Review

Kapal Jurnal Ilmu Pengetahuan dan Teknologi Kelautan, Год журнала: 2024, Номер 21(1), С. 61 - 72

Опубликована: Март 18, 2024

As a country that has more than half of the country's total territorial waters, Indonesia is highly dependent on shipping activities. Therefore, knowledge policy updates for each ship from IMO must also be taken into account, one which regarding Ballast Water Management System, requires every to installed with Treatment System in order achieve goal green environment voyage areas by inhibiting spread microorganisms endanger area caused ballast water. This regulatory update then creates problems, especially ships have been operating long time, because comply standards D-1 and D-2 according time specified convention. So, this review article will discuss solution issues retrofitting water treatment systems as addition new system existing sailed pay attention conceptual aspects consisting considerations operations find type suits ship's needs analyzing advantages disadvantages technology method. There consideration several stages are commonly used determine treatment, starting assessment planning requirements, selection space, compliance BWMS regulations, method, engineering drawing, installation planning, commissioning. Apart that, related innovation were discussed, including development alternative technology, potential efficiency both operational safety standards. Based research developments, ultra-violet (UV) well known common beside electrolysis treatment. The results obtained show method most efficient treatments when viewed way it works duration process. proves can produce maximum if maximized exceed aspect well.

Язык: Английский

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Suitable Area of Invasive Species Alexandrium under Climate Change Scenarios in China Sea Areas

Polish Journal of Environmental Studies, Год журнала: 2022, Номер 32(2), С. 1199 - 1217

Опубликована: Дек. 23, 2022

Alien invasive algae along with ship ballast water have posed a serious threat to China's marine ecological security.A clear understanding of the geographical distribution species and their response climate change can provide scientific basis for prevention control.In this study, combined environmental variables data, MaxEnt was used predict potential trend Alexandrium in four major sea areas China currently, 2040s (2040-2050) 2090s (2090-2100), reveal dominant factors affecting distribution, analyze migration trends centroids highly suitable area, clarify key control areas.The results showed that: 1) The AUC values all models were significantly higher than random models, Kappa statistics "general", demonstrated that prediction available.2) most important variable Temperature.Range (bio24), its range 23.43-31.52ºC.2) At present, corresponding Nantong, Yancheng, Ningbo, Jiaxing, Dongying, Binzhou, Cangzhou, Tianjin, Tangshan, Qinhuangdao, Shenzhen, Dongguan Zhongshan, special attention should be paid Alexandrium.3) Under future scenarios, excepted South Sea, total area an increasing trend.4) Yellow would move southeast.In Bohai Sea East centroid moving different latitudes directions.In both

Язык: Английский

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Effects of physicochemical parameters of water on byproduct formation during electrolysis of ballast water

Frontiers in Environmental Science, Год журнала: 2023, Номер 11

Опубликована: Март 28, 2023

Introduction: Disinfection byproducts (DBPs) generated during ballast water treatment using active substances have gained increasing interest owing to their potential impact on the marine environment. This study aimed investigate occurrence and distribution of DBPs, which are secondary products electrolysis, land-based tests. Methods: DBP levels were compared under various conditions, including chloride bromide ion compositions, hold time, organic matter-related parameters. Results: After trihalomethane (THM) haloacetic acid (HAA) increased from day 0 5 all salinities, whereas haloacetonitrile (HAN) level decreased. THMs found be most dominant group, followed by HAAs HANs. In brackish water, brominated DBPs high ions, while chlorinated concentrations relatively in fresh water. Discussion: specific ultraviolet absorption treated was &gt;4, indicating a likelihood generating carbonaceous such as HAA. These findings contribute better understanding general mechanisms through physicochemical factors affect formation electrolysis is valuable addressing issues related release into environment, an emerging environmental concern.

Язык: Английский

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Isolation and Characterization of <i>Schmutzdecke</i> in Slow Sand Filter for Treating Domestic Wastewater

Journal of Ecological Engineering, Год журнала: 2022, Номер 23(11), С. 76 - 88

Опубликована: Сен. 24, 2022

This research aimed to discover the macroscopic, microscopic, and physiological characteristics genus of heterotrophic bacteria found in schmutzdecke or biofilm layer slow sand filters.The isolation applied pour plate quadrant streak method, while characterization used tests.Samples were taken from on top filter layer, they diluted 3, 4, 5 times, then grown Nutrient Agar media order isolate bacteria.The results analyzed using identification manual books titled Bergey's Manual Determinative Bacteriology, 9 th edition for The Identification Medical Bacteria, 3 rd edition.These manuals show names layer.On basis tests, there 4 dominant genera out 18 living isolates obtained namely Kurthia gibsonii, Bacillus badius, firmus, lentus.The similarity percentage these was 83%, 81%, 85%, 77% respectively.

Язык: Английский

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Suitable Area of Invasive Species <i>Nitzschiella closterium</i> under Climate Change Scenarios in China Sea Areas

Polish Journal of Environmental Studies, Год журнала: 2024, Номер 33(3), С. 2787 - 2797

Опубликована: Фев. 19, 2024

With the advancement of global maritime transport, carriage foreign organisms by vessels is inciting ecological catastrophes such as red tides, posing a grave threat to China's marine environmental security.Clarifying geographical distribution invasive species and their relationship with climate change can provide scientific basis for prevention control.In this discourse, study centers on typical alien microalgae, Nitzschiella closterium.By integrating variables data employing an optimized Maxent model, we delve into its potential in current future conditions coastal waters China, well response variables.After model optimization, results reveal that Area Under Curve (AUC) value training dataset closterium stands at 0.993, denoting high degree accuracy bestowing credibility upon simulated outcomes.Currently, suitability area constitutes 0.74% total area, 0.44×10 4 km², mainly distributed sea corresponding Jiangsu Province, Shanghai City, Zhejiang Province.The most significant factor affecting annual temperature variation range (bio24).In context changes, there overall trend substantial expansion closterium, which profoundly affected change, suggesting control will be more severe.This research comprehensively understands leading through macro prediction proposes countermeasures.It preventing controlling invasions.

Язык: Английский

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The Environmental Impact of Port Activities at the Manila North Harbor: A Qualitative Investigation

Опубликована: Июль 24, 2024

The study assessed the environmental impact of port activities in Manila North Harbor Port and provided insights to contribute enhancement protection policies practices Philippines. Employing descriptive-qualitative design, five (5) purposively selected participants from each department involved at were as study. Using a semi- structured questionnaire, interview was done gather narrative data with thematic analysis method analyzing data. findings highlight that, such oil transport, waste pollution, ship deballasting have significant detrimental effect on environment, leading pollution degradation marine ecosystem. Conversely, like noise cargo handling, passenger transportation relatively lesser impact. Participants observed these harmful persisting since establishment port, resulting negative alterations water quality weather conditions over time. Implementing stringent management regulations, reducing use hazardous substances, conducting regular monitoring ecosystem health assessments, fostering collaboration between authorities, agencies, local communities, allocating resources for research development, utilizing sustainable solutions are ways lessen impacts. Striking balance economic development conservation is crucial port's long-term prosperity preservation surrounding environment.

Язык: Английский

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