علي نظري

In this study, we produced two types of urea fertilizers by combining urea with alginate, as well as alginate and bentonite clay by contacting them with calcium chloride solution in a glass millichannel. The effect of different flow rates on granule formation in millichannel was eva‎luated. Then, size distribution and sphericity coefficient of new fertilizers were obtained by image processing of MATLAB software. In addition, the structure of the new produced fertilizers was investigated using SEM and FTIR analysis. Next, the release rate of nitrogen in water was tested, and also the effects of temperature on the drying of the manufactured granules were briefly examined, and the amount of water absorption of both types of new fertilizers was also calculated. From the economic point of view, the production of new fertilizer was also investigated. The results showed that the size distribution diagram of fertilizer narrowed by adding clay to alginate and the sphericity coefficient of both types of fertilizer was almost the same. The addition of clay did not cause a significant decrease in the release rate of urea in water, and almost all urea was released in water in about 24 hours. This was while normal urea fertilizer was completely dissolved in water in less than an hour. Drying of new manufactured fertilizers at temperatures between 20 and 60 degrees Celsius obtained more spherical granules, while at temperatures above 60 degrees, favorable results were not obtained. In addition, the water absorption test indicated that urea fertilizer containing alginate had more water absorption compared to urea fertilizer containing alginate and clay.

كود اوره آهسته رهش، ميلي كانال، آلژينات، خاك رس بنتونيت، كلسيم كلريد

Slow-release urea fertilizer, millichannel, alginate, bentonite clay, calcium chloride

ali nazari

Dr. salman movahedirad