Effect of fertilizer solution concentrations on filter clogging in drip fertigation systems

2021 ◽  
Vol 250 ◽  
pp. 106829
Author(s):  
Chunye Liu ◽  
Rui Wang ◽  
Wene Wang ◽  
Xiaotao Hu ◽  
Yong Cheng ◽  
...  
Keyword(s):  
Filter Clogging ◽  
Fertilizer Solution ◽  
Drip Fertigation

Drip fertigation studies in Pigeonpea - A Review

2017 ◽  
Vol 10 (02) ◽  
pp. 212-220
Author(s):  
Jeyajothi R ◽  
◽  
Kandeshwari M ◽  
Pandiselvi T ◽  
Keyword(s):  
Drip Fertigation

scholarly journals Effect of Drip Fertigation with Nitrogen on Yield and Nutritive Value of Melon Cultivated on a Very Light Soil

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 934
Author(s):  
Roman Rolbiecki ◽  
Stanisław Rolbiecki ◽  
Anna Figas ◽  
Barbara Jagosz ◽  
Dorota Wichrowska ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Nutritive Value ◽  
Nutrient Retention ◽  
Marketable Yield ◽  
Total Carotenoids ◽  
Retention Capacity ◽  
Total Sugars ◽  
Light Soil ◽  
Two Factors ◽  
Drip Fertigation

Most species of Cucurbitaceae respond favorably to irrigation, especially when combined with fertilizers. The effect of drip irrigation combined with nitrogen fertigation in melon grown on a very light soil in Central Poland, during 2013–2015, was evaluated. The field experimental design was a split-plot with four replications. Two factors were studied: (1) irrigation treatments applied in two combinations—drip irrigation + broadcast nitrogen fertilization (control), and drip irrigation + fertigation with nitrogen; (2) two cultivars—Melba and Seledyn. The total marketable yield of fruits, weight of a single fruit, and the concentration of dry matter, total sugars, monosaccharides, ascorbic acid, total carotenoids, and polyphenols were evaluated. Tested factors presented a significant effect both on the yield and nutritive value characteristics. Drip irrigation combined with nitrogen fertigation, comparing to the control, notably improved yields and nutritional value of fruits. Seledyn produced better yields than Melba. This study shows that on very light soil, with low water and nutrient retention capacity, melon should be drip-irrigated and nitrogen-fertigated to obtain the best cultivation results.

scholarly journals Fertilizer ‘solution’ could turn local problem global

Nature ◽  
2004 ◽  
Vol 427 (6974) ◽  
pp. 485-485 ◽  
Author(s):  
David S. Reay
Keyword(s):  
Local Problem ◽  
Fertilizer Solution

2015 North American ECA: Lessons Learned in CA

2014 ◽  
Author(s):  
Jeff Cowan
Keyword(s):  
Cost Savings ◽  
Lessons Learned ◽  
Fuel Oil ◽  
Compression Ignition ◽  
Heavy Fuel Oil ◽  
Flow Through ◽  
Filter Clogging ◽  
The Cost ◽  
Normal Ambient ◽  
Distillate Fuel

California experienced a 300% increase in loss of propulsion (LOP) incidents since its distillate fuel regulation came into effect in 2009. The compression ignition (Diesel) engines aboard modern cargo ships over 10,000 gross tons use 3.0% sulfur Heavy Fuel Oil (HFO). This fuel must be heated to flow through the fuel lines because at normal ambient temperature HFO has the consistency of tar. Distillate fuel in contrast does not require the high temperatures, and the thermodynamics of cooling metal, gaskets and seals resulted in leaks, along with filter clogging from engine buildup scrubbing. In addition, the cost savings of using HFO are significant over the use of distillate fuel which is typically around US$300 more per ton.

Effect of important operational parameters on performance of coarse pore filtration activated sludge process

2002 ◽  
Vol 46 (9) ◽  
pp. 229-236 ◽  
Author(s):  
M.R. Alavi Moghaddam ◽  
H. Satoh ◽  
T. Mino
Keyword(s):  
Activated Sludge ◽  
Aeration Tank ◽  
Activated Sludge Process ◽  
Operational Parameters ◽  
Solid Retention Time ◽  
Effluent Quality ◽  
Membrane Pores ◽  
Filtration Membrane ◽  
Operation Pressure ◽  
Filter Clogging

A coarse pore filter can be applied inside the aeration tank instead of sedimentation tank for liquid separation from the sludge. It has pores, which are irregular in shape, and much bigger than micro-filtration membrane pores in size. The objective of the study was to investigate the effect of important operational parameters such as flux, aeration intensity, and solid retention time (SRT) on the performance of the coarse pore filtration activated sludge process. The effect of these parameters was studied in laboratory scale experiments. It was found that the flux had a significant role in the effluent quality of this system. The effluent SS and turbidity were not changed significantly at different aeration intensities. Three SRTs, 10, 30 and longer days (without excess sludge) were used for three reactors to check the effect of this parameter on the system performance. The results of the reactors with SRTs about 10 and 30 days have shown very good effluent quality without any filter clogging for more than 4 months operation. For the reactor with long SRT, the filter clogging was observed after about 80 days of operation, which caused the increase of the operation pressure and deterioration in the effluent quality for a few days.

Performance and microbial dynamics in the coarse pore filtration activated sludge process at different SRTs (solids retention times)

2003 ◽  
Vol 47 (12) ◽  
pp. 73-80 ◽  
Author(s):  
M.R. Alavi Moghaddam ◽  
Y. Guan ◽  
H. Satoh ◽  
T. Mino
Keyword(s):  
Microbial Population ◽  
The Other ◽  
Activated Sludge Process ◽  
Filamentous Bacteria ◽  
Microbial Dynamics ◽  
Effluent Quality ◽  
Solids Retention ◽  
Microbial Population Dynamics ◽  
Operation Pressure ◽  
Filter Clogging

In this research, three SRTs (about 10, 30 and 75 days (without wasting the sludge except for sampling)) were applied to three reactors equipped with non-woven and coarse pore filter modules. The flux was adjusted to about 1 m/d during operation. The main objective of the study was to compare the performance and microbial population dynamics under different SRTs in this process. The results of reactors with SRTs of about 10 and 30 days have shown very good effluent quality without any clogging problem for more than 4 months of operation. For the reactor with long SRT (75 days), the filter clogging was observed after about 80 days of operation and caused an increase in the operation pressure and deterioration in effluent quality on some days. Excessive abundance of filamentous bacteria was observed in the reactor with SRT of about 10 days, which had the best effluent quality. According to the FISH results, type 021N was predominant in the reactor with long SRT, which had the clogging problem. On the other hand, other reactors (with SRTs of about 10 and 30 days) did not contain much type 021N, but some other filamentous bacteria dominated. Maximum EPS concentration (as mg/L) was observed in the reactor with long SRT. Also the abundance of two types of metazoa (Pristina sp. and tardigrades) was observed in the reactor with long SRT, which had the clogging problem and poor effluent quality.

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