scholarly journals The role of rice straw-based hydrogels on some soil microorganisms strains

BIO ◽  
2012 ◽  
Vol 1 (1) ◽  
pp. 78-84 ◽  
Author(s):  
O. El-Hady ◽  
S. A. Abo-Sedera ◽  
A. H. Basta ◽  
H. EL-Saied
2019 ◽  
Vol 19 (1) ◽  
pp. 12-17
Author(s):  
Yulidar Yulidar ◽  
Saiful Saiful ◽  
Ilham Maulana

Janeng starch (Dioscorea Alata) and rice straws are developed to be used as adsorbents in dry washing method to purify crude biodiesel. In this study, we evaluate the potential of rice straw and janeng starch as natural adsorbents in the purification of biodiesel that replace the role of water in absorbing contaminants from biodiesel. The SEM characterization results show that the starch adsorbent and rice straw has an open and porous surface and is evenly distributed for janeng starch. Both adsorbents, either the janeng starch or rice straw, can be applied for the purification of biodiesel. The quality of biodiesel is influenced by the amount of adsorbents used in biodiesel purification. The effectiveness of the adsorbent is shown by the decrease in free fatty acids, alkali numbers, soap numbers and turbidity levels in biodiesel. The concentration of free fatty acid oil in crude biodiesel before the purification step was 0.769 mg-KOH/g, then decreased to 0.128 mg-KOH/g after the adsorption. This acid value had been very low and met the Indonesian quality national standard for biodiesel spesically 0.50 mg-KOH/g. Either janeng starch or rice straw adsorbent was able to reduce the soap content of potassium oleate to level 53.33 ppm from the initial content of 106.67 ppm. These two natural adsorbents can be the alternative adsorbents in the purification of biodiesel that employs dry washing method.


Author(s):  
Gusnidar Gusnidar ◽  
Febria Fitria ◽  
Lusi Maira ◽  
Yulnafatmawita Yulnafatmawita
Keyword(s):  

Fuel ◽  
2019 ◽  
Vol 253 ◽  
pp. 1512-1520 ◽  
Author(s):  
Xin Dai ◽  
Baosheng Jin ◽  
Ping Lu ◽  
Xiaojia Wang ◽  
Yaji Huang

2016 ◽  
Vol 1 (2) ◽  
pp. 7-11
Author(s):  
Мельникова ◽  
Natalya Melnikova ◽  
Нечаева ◽  
Elena Nechaeva ◽  
Редин ◽  
...  

The purpose is to justify the use of minimum and zero tillage in conditions of forest-steppe Zavolzhye region from the position of the biological activity of the soil. One of the factors forming and determining the fertility of the soil, is the activity of microorganisms that inhabit it, the active surface which reaches up to several hundred acres for 1 ha of surface topsoil. Important role in building of soil fertility is the number of major groups of microorganisms, which, being the catalysts of metabolism, objectively reflect the nature of biochemical processes. Another academician S. P. Kostychev (1937) pointed out that without the study of biodynamics the knowledge of the soil, especially from the agronomic point of view, may not be complete. Microorganisms occupy a key position in maintaining biochemical capacity of the soil, so monitoring of soil microflora is essential for the maintenance and reproduction of its fertility. This work is devoted to studying the role of soil microorganisms in the process of maintaining and reproduction of soil fertility in the development of new technologies in agriculture. The article presents data on the effect of basic tillage on the number of different groups of soil microorganisms (micromycetes, bacteria, actinomycetes), Shows the number of soil microorganisms, such as micromycetes (mold fungi) and bacteria are significantly influenced by seasonal changes in temperature and humidity than the soil treatment methods. From which it follows that the reduction of the mechanical load on the soil in the forest-steppe of Zavolzhye a significant impact on the number of major groups of microorganisms has not.


2017 ◽  
Vol 216 (4) ◽  
pp. 1236-1246 ◽  
Author(s):  
Yudi M. Lozano ◽  
Cristina Armas ◽  
Sara Hortal ◽  
Fernando Casanoves ◽  
Francisco I. Pugnaire

2016 ◽  
Vol 92 (8) ◽  
pp. fiw107 ◽  
Author(s):  
Aurélie Deveau ◽  
Harald Gross ◽  
Béatrice Palin ◽  
Samina Mehnaz ◽  
Max Schnepf ◽  
...  

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