scholarly journals Application of Aeration Injection to Increase Dissolved Oxygen of Surface Water in The Floating Net Cage

2021 ◽  
Vol 934 (1) ◽  
pp. 012069
Author(s):  
A Cahyadi ◽  
R Zulkarnain
Keyword(s):  
Water Quality ◽  
Surface Layer ◽  
Surface Water ◽  
Dissolved Oxygen ◽  
Single Factor ◽  
Oxygen Levels ◽  
Artificial Aeration ◽  
Net Cage ◽  
Net Cages

Abstract Cirata Reservoir is a place for fish cultivators who mostly cultivate tilapia using floating net cages. However, water quality conditions, especially dissolved oxygen levels, which play an important role in tilapia culture in floating net cages are always uncertain and affect the growth of tilapia. Therefore, artificial aeration is needed that is able to increase dissolved oxygen levels so that it is suitable for tilapia culture by using Aearator Dua Lapis (ADL) engine. This study aims to inject dissolved oxygen into the surface layer of the reservoir by applying the ADL engine with gasoline. ADL operated at 1800, 4500, and 5500 rpm with a torque of 3.5 N/m2 and the DO value is recorded every 10 minutes up to 1440 minutes, the results of DO value were recorded and analyzed by using descriptive statistic and statistically using ANOVA with a single factor showed that the rotation has a very significant effect on the resulting DO value (p<0.01). For ADL operation in floating net cages, 4500 rpm rotation was used at certain depth (0.4 m; 1 m; 1.5 m) and the DO value measured at 4.00 am to 2.00 am (22 hours) in aerated floating net cages and without aerated floating net cages.Aerated floating net cages have a higher DO value, especially at a depth of 0.4 m. ADL as an aerator in floating net cages has a very significant effect (p<0.01) in increasing the DO value in floating net cages at a depth of 40 cm to 1.5 m. This proved that the use of ADL is able to increase the DO value in floating net cages in the first layer with a depth of up to 4 m and ADL also can be used as emergency aeration or supplemental aeration for tilapia culture.

A study of water quality in an urban river and potential improvement using a prototype instream aerator

1989 ◽  
Vol 16 (3) ◽  
pp. 308-316 ◽  
Author(s):  
C. A. Town ◽  
D. S. Mavinic ◽  
B. Moore
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Data Base ◽  
Chlorophyll A ◽  
Late Summer ◽  
Urban River ◽  
Agricultural Activity ◽  
Fish Kills ◽  
Low Dissolved Oxygen ◽  
Oxygen Levels

Urban encroachment and intensive agricultural activity within the Serpentine–Nicomekl watershed (near Vancouver, B.C.) have caused a series of fish (salmon) kills on the Serpentine River since 1980. Low dissolved oxygen was responsible for these kills. This field project investigated some of the dynamic chemical and biological relationships within the river, as well as the use of an instream aerator as a temporary, in situ, water quality improvement measure. Weekly sampling for a 6-month period during the latter half of 1985 established a solid data base for deriving and interpreting meaningful interrelationships. A strong correlation between chlorophyll a and dissolved oxygen levels before the algae die-off supported the hypothesis that algae blooms dying in the fall could create a serious oxygen demand. Because of these environmental conditions, the river is unable to sustain healthy dissolved oxygen levels during this period. As such, a prototype, 460 m artificial aeration line was designed, installed, and monitored to evaluate its potential for alleviating low dissolved oxygen conditions and improving overall water quality during the critical fall period.The instream aerator ran continuously for over 2 months, starting in September 1985. Despite better-than-expected weather conditions (i.e., cool, wet weather) and relatively high dissolved oxygen levels during the fall of 1985, the data base appeared to support the use of this prototype aeration unit as a means of "upgrading" a stretch of an urban river subject to periodic, low dissolved oxygen levels. As a result, a 2-year follow-up study and river monitoring was initiated. In both 1986 and 1987, late summer and early fall river conditions resulted in the potential for serious salmon kills, due to higher-than-normal river temperatures and very low dissolved oxygen. In both instances, the instream aerator prevented such fish kills in a key stretch of the river. Expansion of the system to include other critical stretches of the Serpentine and other urban river systems, near Vancouver, is being considered. Key words: algae, aerator, chlorophyll a, eutrophic, fish kills, instream aeration, river improvement, urban river.

scholarly journals SISTEM FUZZY PADA KONTROLING AERATOR UNTUK MENINGKATKAN KUALITAS AIR KOLAM PEMBIBITAN IKAN MENGGUNAKAN SENSOR DO DAN SENSOR SUHU

2021 ◽  
Vol 8 (1) ◽  
pp. 39
Author(s):  
Andi Farmadi ◽  
Muliadi Muliadi
Keyword(s):  
Water Quality ◽  
Control System ◽  
Dissolved Oxygen ◽  
Continuous Control ◽  
Engine Control ◽  
Inference System ◽  
Analysis And Design ◽  
Oxygen Levels ◽  
Engine Control System ◽  
Smart Machine

<p><em>Dissolved oxygen levels in water will affect water quality directly and indirectly for fish life as well as conditions in the water environment, therefore, it is very important to control water quality for adequate dissolved oxygen levels, because this plays an important role in the health condition of the environmental ecosystem for fish nurseries. Researchers usually measure and monitor water quality using measuring instruments that are widely sold in the market, for conditions of decreasing dissolved oxygen levels in fish nurseries tank can usually be controlled by adding an air bubble machine to the water using an aerator machine. Giving air bubbles to water is an effort to control the conditions for the adequacy of dissolved oxygen in the water, and the best system is to carry out a continuous control system regarding water quality, sometimes the oxygen condition in the water is sufficient for the standard of dissolved oxygen in water. However, the blower blower is still running, this is less effective because it requires unnecessary electrical energy or wastes energy. Analysis of the aerator engine control system is needed to make a design as to what state the aerator engine should be turned on. Analysis of the aerator engine control system can be done by measuring the level of oxygen and water temperature in the fish nursery tank, then designing a fuzzy model with the Sugeno inference system for how long the engine must be turned on. The analysis and design of this aerator system is a proposed solution to these problems with a system of measurement and monitoring carried out intelligently by a machine, so that it is able to measure how late this aerator machine must be turned on. and the developed design is capable of being a smart machine using a fuzzy system</em></p><p><strong><em>Keywords</em></strong><em>: Fuzzy inference, aerator engine, smart system, water quality.</em></p><p><em>Kadar oksigen terlarut dalam air akan mempengaruhi kualitas air secara langsung dan tidak langsung bagi kehidupan ikan juga keadaan di lingkungan air tersebut, oleh karena itu peningkatan kualitas air untuk keadaan kecukupan kadar oksigen yang terlarut sangat penting untuk dikontrol, karena hal ini berperan penting pada kondisi kesehatan ekosistem lingkungan pembibitan ikan. </em><em>Para peneliti biasanya melakukan pengukuran dan pemantauan kualitas air dengan menggunakan alat ukur yang banyak di jual dipasaran, untuk kondisi menurunnya kadar oksigen yang terlarut pada kolam pembibitan ikan biasanya dapat di kontrol dengan menambahkan mesin gelembung udara pada air menggunakan mesin aerator. Pemberian gelembung udara pada air merupakan salah satu upaya untuk mengontrol kondisi kecukupan kadar oksigen yang terlarut di dalam air, dan sistem yang terbaik yaitu melakukan sistem kontrol secara terus menerus mengenai kualitas air, terkadang kondisi oksigen di dalam air telah mencukupi standar kecukupan oksigen terlarut pada air, namun mesin penyembur gelembung udara masih dinyalakan, hal ini menjadi kurang efektif sebab akan membutuhkan energi listrik yang tidak semestinya atau terjadinya pemborosan energi. Analisis sistem pengontrolan mesin aerator dibutuhkan untuk melakukan desain seperti apa sebaiknya keadaan mesin aerator dihidupkan. Analisis sistem pengontrolan mesin aerator ini dapat dilakan dengan mengukur tingkat kadar oksigen dan suhu air pada kolam pembibitan ikan, kemudian melakukan perancangan model fuzzy dengan sistem inferensi sugeno seberapa lama mesin harus dihidupkan. Analisis dan desain sistem aerator ini merupakan usulan solusi permasalahan tersebut dengan sistem pengukuran dan pemantauan dilakukan secara cerdas oleh mesin, sehingga mampu mengukur seberapa lalma mesin aerator ini harus dihidupkan desain alat ini juga diharapkan mampu memberikan solusi peningkatan kualitas air pada pembibitan ikan dan diharapan pula analisis dan desain yang dikembangkan ini mampu menjadi mesin cerdas dengan menggukan sistem fuzzy</em></p><p><strong><em>Kata kunci</em></strong><em> : Fuzzy inferensi, mesin aerator, Sistem cerdas, kualitas air.</em></p>

Pollution Situation of Water Environment and Characteristics of Dissolved Oxygen of Yang River

2015 ◽  
Vol 1092-1093 ◽  
pp. 892-896
Author(s):  
Nan Li ◽  
Quan Wei Wei ◽  
Yi Hong Wu ◽  
Zai Feng Tian ◽  
Hong Bo Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Dissolved Oxygen ◽  
Water Environment ◽  
Monitoring Data ◽  
Water Safety ◽  
River Flows ◽  
Factors Affecting ◽  
Guanting Reservoir ◽  
Fourth Class

No.8 Bridge is the site where Yang River flows into Guanting Reservoir. It’s an important guarantee for the water safety of Guanting Reservoir that the water quality meets the standards steadily at No.8 Bridge. Based on the monitoring data from 2006 to 2013, the interannual and annual trends and correlations among DO, NH3-N and COD of Yang River were analyzed. The factors affecting DO were also discussed. The results showed that DO and COD met the fourth-class standard for surface water. NH3-N decreased year by year and its standard-reaching rate ran up to 70% since 2009. DO and COD, NH3-N was negatively correlated, but not significant, indicating that COD and NH3-N were not important factors affecting DO. DO varied along with seasons, autumn (mean 7.47mg /L) > spring (mean 7.35mg /L) > winter (mean 6.95mg /L) > summer (mean 6.35mg /L). Temperature is an important factor affecting DO. The possible impact on water environment of Guanting Reservoir caused by DO decrease should be paid special attention.

scholarly journals Variations of surface water quality in selected tidal creeks of Sagar Island, Indian Sundarban eco-region: a multivariate approach

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Sanghamitra Basu ◽  
Subarna Bhattacharyya ◽  
Pranab Gogoi ◽  
Suryasis Dasgupta ◽  
Sanjoy Kumar Das
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Surface Water Quality ◽  
Tidal Creeks ◽  
Water Parameters ◽  
Indian Sundarbans ◽  
Sagar Island ◽  
Annual Range

AbstractSagar Island in Indian Sundarbans is bestowed with numerous tidal creeks providing a suitable home to its inherent aquatic biota. The present study investigated the variation in the surface water quality in selected tidal creeks of Sagar Island, Indian Sundarbans to understand the present status of water quality for wildlife propagation and fisheries. Ten water parameters were taken into consideration for analysis on monthly basis from four stations (tidal creeks) from September 2015 to August 2016. One-way ANOVA showed five parameters (water temperature, salinity, dissolved oxygen, turbidity and chemical oxygen demand) varied significantly between seasons (p ≤ 0.05). Factor analysis exhibited four factors explaining 53.21% total variance in the observed data. Salinity and turbidity showed a maximum annual range of variations followed by dissolved oxygen. The fluctuations of physicochemical parameters throughout the year hinted toward the ever-changing nature of the estuarine ecosystem with possible human-induced impacts. Pronounced variation in turbidity seemed to be the effect of ferrying/transportation, monsoonal runoff and other human-induced activities. In the present study, water parameters viz., water temperature, dissolved oxygen and turbidity were the deterministic parameters influencing the variables in the system. The other important parameters were found to be COD, BOD3 and nitrate concentrations during the study period. The study shall provide baseline information in formulating the management measures in terms of water quality in wildlife propagation and fisheries.

scholarly journals KOEFISIEN TRANSFER GAS (KLa ) PADA PROSES AERASI MENGGUNAKAN TRAY AERATOR BERTINGKAT 5 (LIMA)

Jurnal Dampak ◽  
2012 ◽  
Vol 9 (2) ◽  
pp. 132 ◽  
Author(s):  
Suarni Saidi Abuzar
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Dissolved Oxygen ◽  
Transfer Coefficient ◽  
Oxygen Concentration ◽  
Gas Transfer ◽  
Dissolved Oxygen Concentration ◽  
Total Height ◽  
Water And Wastewater ◽  
Gas Transfer Coefficient

ABSTRAKAerasi merupakan salah satu metode yang dapat digunakan untuk menyisihkan kandungan logam dalam air, baik air tanah, air permukaan, maupun air limbah. Salah satu jenis aerator dalam proses aerasi adalah tray aerator. Untuk menganalisis nilai koefisien transfer gas (KLa) pada proses aerasi khususnya tray aerator bertingkat 5 (lima)dengan jarak antar tray 25 cm dan tinggi total 125 cm, perlu dilakukan penelitian dengan tujuan untuk memperoleh nilai KLa. Air dialirkan ke dalam tray aerator bertingkat 5 (lima) dan diukur kandungan Disolved Oxygen (DO) dengan metode water quality checker. Hasil penelitian menunjukan terjadi peningkatan konsentrasi oksigen pada sampel setelah dilakukan aerasi dengan tray aerator bertingkat 5 (lima) dari 5,97 mg/L menjadi 6,34 mg/L dengan nilai koefisien transfer gas (KLa) sebesar 0,045/menit.Kata kunci: Tray Aerator bertingkat 5, Aerasi, Koefisien trasnsfer gas (KLa)ABSTRACTAeration method is one method for removing metalfrom water including groundwater, surface water and wastewater. One of known aerator is method is tray aerator. For analizing gas transfer coefficient (KLa) in aeration method especially in five storey tray aerator with the distance between each aerator was 25 cm and total height was 125 cm. water was discharged in five storey tray aerator and was measured the dissolved oxygen concentration by using water quality checker method. Result showed the increase of oxygen concentration in sample after being aerated in five storey tray aerator, from 5.97 mg/L to 6.34 mg/L with gas transfer coefficient (KLa) 0.045/min. Keywords: Aeration, Five story aerator, Gas transfer coefficient (KLa)

scholarly journals Correlation of Water Quality Against Prevalence of Ectoparasites in Tilapia (Oreochromis niloticus) in the Floating Net Cages Urban Farming Program in Surabaya, East Java

2020 ◽  
Vol 9 (1) ◽  
pp. 12
Author(s):  
Cintia Larasati ◽  
Gunanti Mahasri ◽  
Kusnoto Kusnoto
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Oreochromis Niloticus ◽  
Water Source ◽  
Quality Parameters ◽  
Health Condition ◽  
Survey Method ◽  
Urban Farming ◽  
Temperature Ranges ◽  
Net Cages

The main obstacle to the cultivation of tilapia (Oreochromis niloticus) in the KJA Urban Farming Program in Surabaya is unstable water quality. This is because the reservoirs and bozem used are waters whose water quality depends on the water source so that if the environment experiences a decrease in water quality, the activity of disease agents such as parasites will increase and the health condition of fish will decrease. This condition allows fish to be more susceptible to ectoparasite infestations. This study aims to determine the correlation of water quality with the prevalence of ectoparasites in tilapia in the KJA Urban Farming Program in Surabaya. The method used is a survey method. The results of measurements of water quality parameters indicate that the temperature ranges between 29-30C, pH 7-8.5, brightness 18-30 cm, dissolved oxygen 4.8-5.3 mg / l, nitrite <0.043-2.213 mg / l, nitrate <0.008-7.781 mg / l and ammonia 0.063-0.35 mg / l. The results of the average prevalence of Trichodina ectoparasites were 73.85% and Dactylogyrus ectoparasites were 2.85%. There is a positive correlation between temperature, pH, nitrate, nitrite with the prevalence of Trichodina, and temperature, pH, and nitrate with the prevalence of Dactylogyrus. There is a negative correlation between brightness, dissolved oxygen and ammonia with the prevalence of Trichodina, and brightness, nitrite, dissolved oxygen, and ammonia with the prevalence of Dactylogyrus.

scholarly journals Diagnosa Penyakit Bakterial Pada Ikan Nila (Oreocrhomis niloticus) Yang Di Budi Daya Pada Jaring Tancap Di Danau Tondano

2014 ◽  
Vol 2 (3) ◽  
Author(s):  
Chairanitansyah Ashari ◽  
Reiny A Tumbol ◽  
Magdalena E.F Kolopita
Keyword(s):  
Water Quality ◽  
Clinical Symptoms ◽  
Good Condition ◽  
Head Kidney ◽  
Petri Dish ◽  
Water Quality Parameter ◽  
Bacterial Disease ◽  
Fish Samples ◽  
Net Cage ◽  
Net Cages

This research aimed to diagnose bacterial diseases on nile tilapia cultured in stick net cage in Lake Tondano. Fish samples were taken from three locations of net cages in Lake Tondano namely Paleloan, Eris and Remboken villages. Three samples of fish were taken from each location/village. The samples taken showed clinical symptoms of bacterial infection such as hemorrhagic on the abdomen, the base of the fin, anal and chest, irregular swimming fish, hemorrhagic on the gills, fish refuse food, remain silent on the outskirts of net cage. Bacteria were isolated by using a sterile loop from head kidney (anterior kidney), which is located on the front, below the spine near the head. Bacterial cultures were performed on TSA media by making a zigzag scratches. The petri dish containing bacterial isolates were subsequently incubated in an incubator at a temperature of 35oC for 24 hours. The water quality parameter data measured consisted of temperature, Dissolved Oxygen, pH, ammonia, brightness. The results of the study showed that farmed tilapia in Lake Tondano has been infected with Aeromonas hydrophila that causes MAS (Motile Aeromonad Septicemia). The water quality, both chemical and physics around the net cages in the Lake Tondano was still in good condition and suitable for fish cultivation.   Keywords: Oreocrhomis niloticus, Bacterial disease, septicemia aeromonad motile, fixed net cage, Lake Tondano

scholarly journals Statistic Functions of the Surface Water Bodies’ Water Quality Hydrochemical Indicators Distribution

2012 ◽  
pp. 21-32
Author(s):  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Dissolved Oxygen ◽  
Normal Distribution ◽  
Formation Mechanism ◽  
Water Bodies ◽  
Chemical Monitoring ◽  
Chemical Indicators ◽  
Hydrogen Carbonates ◽  
Surface Water Bodies

Water quality chemical indicators functions’ distribution formation mechanism has been discussed. It has been demonstrated that the water quality indicators’distribution variability is characterized by considerable asymmetry and it cannot be approximated by normal distribution, excluding dissolved oxygen, hydrogen carbonates, and silicon. A pattern for water quality point indicators calculation construction on the basis of water bodies’ water quality regular hydro-chemical monitoring data has been proposed.

scholarly journals Spatial Forecasting of Dissolved Oxygen Concentration in the Eastern Black Sea Basin, Turkey

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1041
Author(s):  
Sinan Nacar ◽  
Adem Bayram ◽  
Osman Tugrul Baki ◽  
Murat Kankal ◽  
Egemen Aras
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Dissolved Oxygen ◽  
Black Sea ◽  
Surface Water Quality ◽  
Absolute Error ◽  
Multivariate Adaptive Regression Splines ◽  
Linear Functions ◽  
Exponential Power ◽  
Teaching Learning

The aim of this study was to model, as well as monitor and assess the surface water quality in the Eastern Black Sea (EBS) Basin stream, Turkey. The water-quality indicators monitored monthly for the seven streams were water temperature (WT), pH, total dissolved solids (TDS), and electrical conductivity (EC), as well as luminescent dissolved oxygen (LDO) concentration and saturation. Based on an 18-month data monitoring, the surface water quality variation was spatially and temporally evaluated with reference to the Turkish Surface Water Quality Regulation. First, the teaching–learning based optimization (TLBO) algorithm and conventional regression analysis (CRA) were applied to three different regression forms, i.e., exponential, power, and linear functions, to predict LDO concentrations. Then, the multivariate adaptive regression splines (MARS) method was employed and three performance measures, namely, mean absolute error (MAE), root means square error (RMSE), and Nash Sutcliffe coefficient of efficiency (NSCE) were used to evaluate the performances of the MARS, TLBO, and CRA methods. The monitoring results revealed that all streams showed the same trend in that lower WT values in the winter months resulted in higher LDO concentrations, while higher WT values in summer led to lower LDO concentrations. Similarly, autumn, which presented the higher TDS concentrations brought about higher EC values, while spring, which presented the lower TDS concentrations gave rise to lower EC values. It was concluded that the water quality of the streams in the EBS basin was high-quality water in terms of the parameters monitored in situ, of which the LDO concentration varied from 9.13 to 10.12 mg/L in summer and from 12.31 to 13.26 mg/L in winter. When the prediction accuracies of the three models were compared, it was seen that the MARS method provided more successful results than the other methods. The results of the TLBO and the CRA methods were very close to each other. The RMSE, MAE, and NSCE values were 0.2599 mg/L, 0.2125 mg/L, and 0.9645, respectively, for the best MARS model, while these values were 0.4167 mg/L, 0.3068 mg/L, and 0.9086, respectively, for the best TLBO and CRA models. In general, the LDO concentration could be successfully predicted using the MARS method with various input combinations of WT, EC, and pH variables.

Sign in / Sign up

Export Citation Format

Share Document