scholarly journals Study on Gypsum Plasters with Modified Waste Mycelium as Retarder

Author(s):  
Jichen Liang ◽  
Zihui Li ◽  
Xiaoya Yan ◽  
Xiaoqiong Ren ◽  
Fengqing Zhao
Keyword(s):  
2016 ◽  
Vol 430 ◽  
pp. 1-7 ◽  
Author(s):  
Mengyuan Lv ◽  
Ying Hu ◽  
Michael G. Gänzle ◽  
Jianguo Lin ◽  
Changgao Wang ◽  
...  

2014 ◽  
Vol 1015 ◽  
pp. 272-275
Author(s):  
Xiao Qiong Ren ◽  
Ya Nan Wu ◽  
Ying Li ◽  
Mo Han Lin ◽  
Feng Qing Zhao

Gypsum retarder is an important additive of building materials. Commercial gypsum retarders are mainly composed of four types: organic acids, phosphates, protein and composite retarder. Although the effects of organic acids and phosphates have better retarding performances, there is still obvious a shortcoming that the mechanical strength reduces largely with time going by. Protein based retarders prolong the setting time of hemihydrates with less strength loss and higher costs. The gypsum retarder from waste mycelium, a protein-rich raw material, solved the problem of the disposal of waste mycelium from anti-biotic plants, while producing high-quality retarder for gypsum, shows potential for future.


1967 ◽  
Vol 1 (12) ◽  
pp. 714-715
Author(s):  
E. P. Ermakov ◽  
V. I. Rumyantsev
Keyword(s):  

2013 ◽  
Vol 746 ◽  
pp. 58-61 ◽  
Author(s):  
Xiao Qiong Ren ◽  
Feng Qing Zhao

The waste mycelium containing a certain amount of antibiotic is a byproduct of the fermentation industry. If not handled properly, it would cause environmental pollution and result abuse of antibiotics. This paper introduces the treatment and resource utilization technologies of waste mycelium, including extraction of chitosan and ergosterol from waste mycelium, preparation of activated carbon, and preparation of gypsum retarder with waste mycelium. The integrated process of waste mycelium utilization was proposed.


2010 ◽  
Vol 75 (4) ◽  
pp. 551-564 ◽  
Author(s):  
Velizar Gochev ◽  
Zdravka Velkova ◽  
Margarita Stoytcheva

In this study, the Cr(VI) removal potential of waste mycelium from the industrial xylanase-producing strain Aspergillus awamori was evaluated. It was determined by FTIR analysis that amino groups from the major fungal wall constituents, chitin and chitosan, played a key role in the metal binding process. The effect of pH, initial ion concentration, temperature and amount of biomass on the removal was also studied. The removal efficiency increased with decreasing pH and increasing temperature and amount of biomass. The mechanism of Cr(VI) removal by A. awamori can be explained by a two-stage process involving an initial adsorption stage followed by a reducing stage. The removal process was described by a second-order polynomial and the optimal process parameters for attaining Rmax 94.4 % in 48 h were predicted, i.e., pH 1.5 and T 40?C. From both economic and ecological points of view, a promising possibility for the utilization of waste industrial mycelium of A. awamori as a low-cost Cr(VI) removal agent was proposed.


1955 ◽  
Vol 6 (4) ◽  
pp. 423
Author(s):  
LB Thrower

Waste mycelium from penicillin production is useful as a fertilizer, but its effect is largely that of other organic materials. Penicillium chrysogenum Thom. does not establish itself in the soil and its beneficial influence on soil structure is due to its utilization as a substrate by rapidly growing Mucorales. Residual, crude penicillin contained in the mycelium may have an effect on the soil bacteria, but was not effective as a systemic fungicide in water culture experiments. Any influence due to residual penicillin would be of short duration because the antibiotic is unstable at normal temperatures; autolysis of the mycelium is evident after about 24 hr. Mycelial extract had an adverse effect on the germination and growth of tomato seeds, indicating that it contained a plant growth substance such as indoleacetic acid.


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