scholarly journals Development of CENTS-RAS system using PLC improve water quality

2020 ◽  
Vol 1 (1) ◽  
pp. 13-15
Author(s):  
Masrul Nizam Mahmod ◽  
Mastura Ramli ◽  
Ahmad Daud Om
Keyword(s):  
Water Quality ◽  
Interval Methods ◽  
Time Interval ◽  
Water Quality Control ◽  
Recirculating Aquaculture ◽  
Dirty Water ◽  
Electrical Actuator ◽  
Tank System ◽  
Manual Methods ◽  
Fish Survival

Cheap Efficient Nursery Tank System - Recirculating Aquaculture System (CENTS-RAS) is an alternative hatchery system used in most places in Tanjung Demong Terengganu. Waste trap (Wastrap) is a system on CENTS-RAS to dispose of sewage and needs to be opened according to schedule to ensure water quality is at a good level. This requires employees to open the wastrap manually and in an orderly manner. Problems occur when the frequency does not occur regularly. Design and construction smart wastewater controlled by Programmable Logic Controller (PLC) to output electrical actuator ball valve fit in inlet water and wastrap installed in CENTS-RAS for maintaining good water quality. Disposal of dirty water as well as conversion with clean livestock water is systematically controlled based on the programmed time. Previously using manual methods for wastrap opening, fish survival and growth probably limit the production potential is around 78% -85%. After construction with smart system automatically regular scheduling with 4 time interval methods that have been set will work 24 hours a day for 50 days to ensure the conversion rate and life is high. Effectiveness water quality control were higher by implementing new design using automated methods.

scholarly journals Recirculating Aquaculture Technologies

2019 ◽  
pp. 35-76 ◽  
Author(s):  
Carlos A. Espinal ◽  
Daniel Matulić
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Wastewater Treatment ◽  
Water Quality Control ◽  
New Developments ◽  
The Past ◽  
Control Processes ◽  
Recirculating Aquaculture ◽  
Recirculating Aquaculture Systems ◽  
Aquaculture Production

AbstractRecirculating aquaculture technology, which includes aquaponics, has been under development for the past 40 years from a combination of technologies derived from the wastewater treatment and aquaculture sectors. Until recently, recirculating aquaculture systems (RAS) farms have been relatively small compared with other types of modern aquaculture production. The last two decades have seen a significant increase in the development of this technology, with increased market acceptance and scale. This chapter provides a brief overview of the history, water quality control processes, new developments and ongoing challenges of RAS.

scholarly journals Biochar-immobilized Sphingomonas sp. and Acinetobacter sp. isolates to enhance nutrient removal: potential application in crab aquaculture

2020 ◽  
Vol 12 ◽  
pp. 251-262
Author(s):  
Y Shao ◽  
H Zhong ◽  
X Mao ◽  
H Zhang
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Inorganic Nitrogen ◽  
Ammonia Nitrogen ◽  
Experimental Methodology ◽  
Bacterial Strains ◽  
Water Quality Control ◽  
Surrounding Water ◽  
Recirculating Aquaculture ◽  
Recirculating Aquaculture Systems

The frequency of water exchange and reducing the risk of eutrophication to surrounding water bodies have always been water-quality control issues in recirculating aquaculture systems. In this study, maize straw biochar prepared through pyrolysis showed great potential for both bacterial immobilization and pollutant adsorption. Heterotrophic bacterial strains of Sphingomonas sp. PDD-57b-25 and Acinetobacter towneri were isolated in situ from wastewater for pollutant remediation through a 16S rDNA-based method, which has been rarely reported to date. The selected strains had higher ammonia nitrogen (NH4+-N, 63%), nitrite nitrogen (NO2--N, 38%), nitrate nitrogen (NO3--N, 25%) and total phosphorus (TP, 35%) assimilation capacities than those of other widely applied bacteria under similar medium conditions. In addition, more NH4+-N (+16%), NO2--N (+14%), NO3--N (+17%) and TP (+19%) was removed by biochar-immobilized isolated strains than dissociated strains, suggesting their use may provide a means of improving water-quality control in recirculating aquaculture. With specific additions (4 g l-1) of biochar-immobilized Sphingomonas sp. PDD-57b-25 and A. towneri, the dissolved inorganic nitrogen (approximately 0.45 mg l-1) and TP (approximately 0.09 mg l-1) levels were maintained below the clean water threshold for recirculating aquaculture of crab Eriocheir sinensis. Furthermore, the added strains exhibited high bio-safety and were capable of improving the yield and quality of crabs. Results indicate the potential applicability of biochar-immobilized Sphingomonas sp. PDD-57b-25 and A. towneri in agricultural sewage treatments. Further, the experimental methodology developed here may be used for the exploration of new strains for practical aquaculture.

scholarly journals ANALISIS MUTU AIR DENGAN PENDEKATAN SIX SIGMA UNTUK PENINGKATAN MUTU PLAT BAJA

2018 ◽  
Vol 19 (2) ◽  
pp. 155
Author(s):  
AFNI KHADIJAH ◽  
Muantulloh Muantulloh ◽  
Erni Krisnaningsih ◽  
Ellia Kristiningrum
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Six Sigma ◽  
Ph Value ◽  
Raw Material ◽  
Quality Factors ◽  
Water Quality Control ◽  
Quality Steel ◽  
Dirty Water ◽  
Filter Water

<p>Nowadays, steel needs in the industrial and housing sectors are the most fundamental needs. Steel is used as raw material in manufacturing and construction processes so that good quality steel is required. In the production process to produce good quality steel there are still some problems that arise one cause of the quality of steel due to water quality degradation. Six sigma method is used for water quality control and seven tools method is used to analyze the factors causing water quality decrease. Several factors affect water quality factors such as pH, Cl, Turbidity, SS, Fe, m-Al, Ca-H, PO4. After the data is analyzed it is known that turbidity can cause the carrying of iron particles from the water so that will cause defects on the surface of the plate. Other quality factors such as pH have an impact on the level of engine corrosivity and steel piping. The more acidic or alkaline a solution the higher the corrosive level. Based on testing of water samples obtained turbidity parameter data experienced the largest deviation compared with other parameters so that handling on this parameter should be prioritized. The greater the value of turbidity, the greater the potential carrying iron crust particles that resulted in the buildup and blockage of the pipe. Based on analysis of quality control using six sigma obtained RPN value of dirty water supply equal to 579, RPN turbidity value 512, RPN pH value equal to 448, RPN Fe value 392 and RPN value Filter tool / filter water does not filter optimally equal to 336.</p>

Variation of Water Quality in Fish Farm Using Recirculating Aquaculture System for Fancy Carp

2018 ◽  
Vol 19 (1) ◽  
pp. 37-45
Author(s):  
Woo Jin Lee ◽  
Seon Woo Baek ◽  
Ha Na Seo ◽  
Byeong Wook Kong ◽  
Deog Gwan Ra ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Farm ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Aquaculture System

Влияние экологического состояния водоисточника на режим работы водопроводных очистных сооружений

2020 ◽  
Author(s):  
P. Bykova ◽  
I. Egorova ◽  
A. Strelkov ◽  
L. Talovyria ◽  
O. Nesterenko ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Reservoir ◽  
Water Source ◽  
Optimal Dose ◽  
Source Water ◽  
Regulatory Requirements ◽  
Water Quality Control ◽  
Water Abstraction ◽  
The City

При изучении качества воды источника водоснабжения г. Самары Саратовского водохранилища особое внимание было уделено основным показателям, влияющим на выбор реагентной обработки: мутность, перманганатная окисляемость и цветность. Сезонные изменения качества воды водохранилища требуют постоянной корректировки дозы реагентов с целью достижения нормативных требований к качеству очищенной воды. Приводятся результаты производственных исследований изменения качества воды Саратовского водохранилища в створе водозаборов г. Самары за 20172019 годы по мутности, перманганатной окисляемости и цветности. В связи с аномальными температурными перепадами и наступлением осеннего паводка (конец декабря 2019 г. и январь 2020 г.) резко изменилось качество воды водохранилища по цветности и перманганатной окисляемости. Отмечено, что увеличение указанных показателей потребовало повышения дозы реагентов при очистке исходной воды. Оптимальная доза реагентов постоянно коректируется в зависимости от состава исходной воды на флокуляторе Lovibond ЕТ-750 . Регулярное проведение пробного коагулирования позволило поддерживать качество очищенной воды в соответствии с нормативными требованиями СанПиН 2.1.4.1074-01 Питьевая вода. Контроль качества , кроме цветности и железа общего, так как превышение этих показателей наблюдалось в пределах погрешности методов измерения.While studying the water quality of the water source of the city of Samara the Saratov water reservoir, special attention was paid to the main indicators that influence the choice of chemical treatment: turbidity, permanganate index and color. Seasonal changes in the water quality of the water reservoir require constant adjustment of the chemical dose in order to meet the regulatory requirements to the quality of treated water. The results of the studies of changes in the water quality of the Saratov reservoir at the water abstraction points of the city of Samara for 20172019 by turbidity, permanganate index and color are presented. Due to the abnormal temperature differences and onset of autumn flood (end of December 2019 and January 2020), the water quality in the water reservoir dramatically changed in color and permanganate index. It was noted that an increase in these indicators required an increase in the dose of chemicals during the source water purification. The optimal dose of chemicals is selected with Lovibond ET-750 flocculator depending on the composition of the source water. Regular test coagulation allowed maintaining the quality of purified water in accordance with the regulatory requirements of SanPiN 2.1.4.1074-01 Drinking water. Quality control , except for color and total iron since the values of these indicators were increased within the measurement accuracy.

scholarly journals Electron generation in water induced by magnetic effect and its impact on dissolved oxygen concentration

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Augustine Chung Wei Yap ◽  
Hwang Sheng Lee ◽  
Joo Ling Loo ◽  
Nuruol Syuhadaa Mohd
Keyword(s):  
Water Quality ◽  
Hydrogen Bonding ◽  
Dissolved Oxygen ◽  
Electron Density ◽  
Water Flow ◽  
Magnetic Effect ◽  
Water Quality Control ◽  
Electron Generation ◽  
Magnetic Effects ◽  
Do Concentration

AbstractpH, oxidation-reduction potential (ORP) and dissolved oxygen (DO) concentration are important parameters in water quality surveillance and treatment. The changes of these parameters are associated with electron density in water. Several techniques including electrolysis and catalysis which require redox reactions and electron exchange are employed to improve these parameters. In recent years, studies reported that magnetic effects can impart considerable changes on the pH, ORP and DO concentration of water. However, the correlation between electron density and magnetic effects on these parameters has yet to be disclosed despite the fact that increased electron density in water could improve water’s reductive properties, heat capacity and hydrogen bonding characteristics. In this study, the magnetic effects on pH, ORP and DO concentration were investigated using different magnets arrangements and water flow rates based on reversed electric motor principle. Results showed that the improvement of pH, ORP and DO concentration from 5.40–5.42 to 5.58–5.62 (+ 3.5%), 392 to 365 mV (− 6.9%), and 7.30 to 7.71 mg L− 1 (+ 5.6%), respectively were achieved using combined variables of non-reversed polarity magnet arrangement (1000–1500 G magnetic strength) and water flow rate of 0.1–0.5 mL s− 1. Such decrement in ORP value also corresponded to 8.0 × 1013 number of electron generation in water. Furthermore, Raman analysis revealed that magnetic effect could strengthen the intermolecular hydrogen bonding of water molecules and favor formation of smaller water clusters. The findings of this study could contribute to potential applications in aquaculture, water quality control and treatment of cancer attributed to free radical induced-oxidative stress.

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