scholarly journals Performance of Disc, Conventional and Automatic Screen Filters Under Rainbow Trout Fish Farm Effluent for Drip Irrigation System

2021 ◽  
Author(s):  
Abed Mohammad Hasani ◽  
Saman Nikmehr ◽  
Eisa Maroufpoor ◽  
younes Aminpour ◽  
Jaume Puig Bargués
Keyword(s):  
Rainbow Trout ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Head Loss ◽  
Fish Farm ◽  
Drip Irrigation System ◽  
Working Pressure ◽  
North West ◽  
The North ◽  
The Difference

Abstract This study aims to investigate the performance of disc, conventional screen, and automatic screen filters when rainbow trout fish effluent is used for irrigation. The experiments were performed in a fish farm, located in the north-west of Iran. The disc and conventional screen filters were tested at pressures of 150 and 300 kPa, and the automatic screen filter at 200 and 300 kPa. The filtration experiments continued until the backwashing was reached. The results showed that (1) the initial head loss of disc and conventional screen filters was 40 kPa, while for the automatic screen filter was 5 kPa. (2) In the disc filter, with increasing working pressure, the filtered volume significantly (P<0.05) increased from 9.7 to 14.5 m3 m-2 (10 kPa)-1, but for conventional and automatic screen filters, it was constant at 5.5 and 7.0 m3 m-2 (10 kPa)-1, respectively, and all of them had significant (P<0.05) differences. (3) In the disc filter, with increasing the working pressure, the filtered volume to reach backwashing significantly (P<0.01) increased from 80.9 to 104.4 m3 m-2, while in the conventional screen filter increased from 14.1 to 16.4 m3 m-2. This volume at two working pressures was 29.5 m3 m-2 for the automatic screen filter. These volumes were significantly different (P<0.01) between filters. (4) The mass retention for the disc, conventional, and automatic screen filters were 28.88, 9.11, and 7.72 g min-1 m-2, respectively and tended to increase at lower working pressures. Based on this index, the difference in the performance of the filters was significant (P<0.01). (5) Overall, the best performance was for the disc filter, and after that was the automatic screen filters, but the period of time to operate for the filters until backwashing time was less than half an hour, which is not applicable under farm conditions.

scholarly journals The Effects of Grafting-Varaiety Combunations to every year Productivity Indigators and Effective Fruit Fallling on Pear Plant

2019 ◽  
Vol 16 (04) ◽  
pp. 827-831
Author(s):  
Islam Akif Beyahmedov
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Average Degree ◽  
Productivity Index ◽  
Drip Irrigation System ◽  
The North ◽  
North Eastern ◽  
Stable Product

In the article is assigned information about useful fruit falling and productivity every year in the combinations different grafting-varieties of the pear. The research was carried out in the Guba and Gusar regions of the north-eastern of country. The researches were carried out; in the Dakhli village of Guba region, on the grafting wild forest pear, 6x4 m food area, with Khure which was planted in 2004; The sorts as beauty of Talgar, white Williams, beauty of forest in the New life village of Qusar region on the graftin BA-29, 4x1.25m food area, planted in 2008-2009; The varieties as conference, white Williams, red Williams, Forelle and Quyot which were cultivated in the trellis and has been installed drip irrigation system The research was carried out by generally accepted methods for gardening. At this time, every two years productivity index was calculated by a Sinq formula. According to the index varieties and years are considered: 20% - up indicator - highly stable harvestable; 21 ... 40% - to compared stable product each year; 41 ... 60% - Average degree of every two years harvestable; 61 ... 80% strong harvestable every two years; 81 ... 100% more powerful harvestable every two years

scholarly journals Re-designing irrigated intensive cereal systems through bundling precision agronomic innovations for transitioning towards agricultural sustainability in North-West India

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
H. S. Jat ◽  
P. C. Sharma ◽  
Ashim Datta ◽  
Madhu Choudhary ◽  
S. K. Kakraliya ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Water Productivity ◽  
Crop Productivity ◽  
Drip Irrigation System ◽  
Flood Irrigation ◽  
Energy Productivity ◽  
North West ◽  
Surface Drip Irrigation

AbstractA study was conducted to design productive, profitable, irrigation water¸ nitrogen and energy use efficient intensive cereal systems (rice-wheat; RW and maize-wheat; MW) in North-West India. Bundling of conservation agriculture (CA) with sub-surface drip irrigation termed as CA+ were compared with CA alone and conventional tillage based and flood irrigated RW rotation (farmer’s practice; ScI). In contrast to conventional till RW rotation which consumed 1889 mm ha−1 irrigation water (2-yr mean), CA+ system saved 58.4 and 95.5% irrigation water in RW and MW rotations, respectively. CA+ practices saved 45.8 and 22.7% of irrigation water in rice and maize, respectively compared to CA with flood irrigation. On a system basis, CA+ practices saved 46.7 and 44.7% irrigation water under RW (ScV) and MW (ScVI) systems compared to their respective CA-based systems with flood irrigation (ScIII and ScIV). CA+ in RW system recorded 11.2% higher crop productivity and improved irrigation water productivity by 145% and profitability by 29.2% compared to farmers’ practice. Substitution of rice with maize (MW system; ScVI) recorded 19.7% higher productivity, saved 84.5% of irrigation water and increased net returns by 48.9% compared to farmer’s practice. CA+ RW and MW system improved energy productivity by 75 and 169% and partial factor productivity of N by 44.6 and 49.6%, respectively compared to ScI. The sub-surface drip irrigation system saved the fertilizer N by 20% under CA systems. CA+ in RW and MW systems recorded ~13 and 5% (2-yr mean) higher profitability with 80% subsidy on installing sub-surface drip irrigation system and similar profitability without subsidy scenario compared with their respective flood irrigated CA-based systems.

scholarly journals On-station Evaluation of Family Drip Irrigation System in North-West Ethiopia

2019 ◽  
pp. 1-7
Author(s):  
Kasa Mekonen Tiku ◽  
Shushay Hagoes ◽  
Berhane Yohanes
Keyword(s):  
Irrigation Water ◽  
Drip Irrigation ◽  
Irrigation System ◽  
Water Productivity ◽  
Northwest Ethiopia ◽  
Furrow Irrigation ◽  
Drip Irrigation System ◽  
North West ◽  
Irrigation Methods ◽  
Irrigation Water Productivity

The study was carried out at the effect of drip and surface irrigation (Furrow irrigation) methods on onion and sesame crops from December 2011 to May 2012 in the Tigray region of Northwest Ethiopia. The objective was to evaluate the family drip irrigation system in comparison with furrow irrigation system in terms of irrigation water productivity (using 100% ETc for both commodities). The water saved in drip irrigation over furrow irrigation was found to be 33% for onion and sesame crops. The irrigation water productivity of onion was 0.9 kg/m3 and 0.55 kg/m3 under drip and furrow irrigation methods respectively. The irrigation water productivity of sesame was 0.14 kg/m3 and 0.045 kg/m3 under drip and furrow irrigation methods respectively.

scholarly journals PERFORMANCE EVALUATION OF DRIP IRRIGATION SYSTEM ACCORDING TO THE SUGGESTED STANDARDS

2018 ◽  
Vol 49 (6) ◽  
Author(s):  
AL-MHMDY & AL-DULAIMY
Keyword(s):  
Drip Irrigation ◽  
Irrigation System ◽  
Block Design ◽  
Drip Irrigation System ◽  
North West ◽  
Uniformity Coefficient ◽  
Design Discharge ◽  
Two Factors ◽  
Discharge Variation ◽  
Periodic Evaluation

A field experiment was conducted during autumn season 2017 at Al-Saqlawia, far about 50km north-west of Baghdad/Iraq, aimed to a periodic evaluation for drip irrigation system to obtain best values of the suggested standards. The experiment included two factors; first, emitters' discharge (d) at two levels using emitters with 4Lh-1 design discharge (d4) and emitters with 8Lh-1 design discharge (d8). While the second factor; operational pressure at three levels, first level, operational pressure 0.5 bar(P1), second, operational pressure 0.7 bar(P2), and the last, operational pressure 1.0 bar (P3), the experiment was designed according to randomized complete block design. The results showed a decrease in values of both uniformity coefficient and emission uniformity, while the rate of actual discharge and variation ratios have been increased with the increase of operational pressure and for both discharge, where the reduction ratios at uniformity coefficient reached 3.02%, 4.25%, while at emission uniformity 6.52%, 7.18%, then actual discharge ratios increased about 10.75%, 20.25%, while the discharge variation ratios increased to reach 389.36%, 490.48%; while at depending an emitter 8Lh-1  actual discharge, the reduction ratios at uniformity coefficient reached 1.33%, 2.64%, then at emission uniformity, they reached 3.91%, 2.85%, while actual discharge ratios increased to reach 11.73%, 21.44%, then the increase ratios of discharge variation were about 122%, 199.22% when comparing above values with the effect of operational pressure mentioned previously.          

ESTIMATION OF CONSUMPTIVE USE OF POTATO CROP PIANTED UNDER DRIP IRRIGATION SYSTEM BY USING SWRT TECHNOLOGY

2020 ◽  
Vol 10 (1) ◽  
pp. 271-282
Author(s):  
J.N. Abedalrahman ◽  
R.J. Mansor ◽  
D.R. Abass
Keyword(s):  
Water Consumption ◽  
Drip Irrigation ◽  
Soil Depth ◽  
Irrigation System ◽  
Potato Crop ◽  
Block Design ◽  
Organic Fertilizer ◽  
Control Treatment ◽  
Drip Irrigation System ◽  
Spring Season

A field experiment was carried out in the field of the College of Agriculture / University of Wasit, located on longitude  45o   50o   33.5o   East and latitude 32o 29o 49.8o North, in Spring season of the agricultural season 2019, in order to estimate the water consumption of potato crop using SWRT technology and under the drip irrigation system. The experiment was designed according to Randomized Complete Block Design (RCBD) with three replications and four treatments that include of the SWRT treatment (the use of plastic films under the plant root area in an engineering style), and the treatment of vegetal fertilizer (using Petmos), organic fertilizer (sheep manure), and the control treatment . Potato tubers (Solanum tuberosum L.)  var. Burin was planted for spring season on 10/2/2019 at the soil depth of 5-10 cm. The highest reference water consumption for the potato crop during the season was calculated by Najeeb Kharufa, which was 663.03 mm. The highest actual water consumption for the potato crop during the season for the control treatment was 410.1 mm. The results showed increase in the values of the crop coefficient (Kc) in the stages of tubers formation and tubers filling stage as compared to the vegetative and ripening stages, ranged from 1.37-1.92 for the two stages of tubers formation and tubers filling. The SWRT treatment gave the highest water use efficiency during the season, was 3.46 kg m-3 .

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