Biocement is a product innovation from developing bioprocess technology called Bacillus cereus KLUVAA Mediated Biocement Production Using Hard Water. In the present study, a potential bacterial strain with maximum urease activity was isolated from urea-rich paddy field soil for biocement production. The bacterial. Citation: Ariyanti D, Handayani NA, Hadiyanto Feasibility of Using Microalgae for Biocement Production through Biocementation. J Bioprocess Biotechniq.
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An Overview of Biocement Production from Microalgae
biocement production The high yield in the pH 9 shock fermentation could be explained by: This study also demonstrated that the VFA yield can still be further optimized by fine-tuning pH levels and longer operation, possibly with fermentative microorganisms adapted to a high pH that are commonly found in nature.
This precipitation biocement production governed by four key factors: Numerous species of microorganism have been detected previously and assumed to be associated with natural carbonate precipitates from diverse environments. The primary role of microorganism in carbonate precipitation is mainly due to their ability to create an alkaline environment high pH and [DIC] increase through their various physiological activities [ 16 ].
There are three main groups of microorganism that can induce the carbonate precipitation: The most common MCIP phenomena appeared in aquatic environments is caused by photosynthetic microorganisms [ 7biocement production ]. Photosynthetic microorganisms use CO2 in their metabolic process equation 1 which is in equilibrium with HCO3- and CO3 2- as described biocement production equation 2.
(PDF) An Overview of Biocement Production from Microalgae
Carbon dioxide consumed by photosynthetic microorganisms shift the equilibrium and resulting the increment of pH equation 3 [ 7 ]. When this reaction biocement production in the present of calcium ion in the system, calcium carbonate is produced as biocement production at chemical reaction in equation 4 [ 6 ].
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This microorganism produces carbonate or bicarbonate and modified the system so that the carbonate precipitation may occur [ 1 ].
Abiotic dissolution biocement production gypsum CaSO4.
Dessy Ariyanti, Department of Chemical Engineering, media for biocementation still lack in literature, in fact microalgae have Faculty of Engineering, Diponegoro University, Prof Soedarto, SH Kampus Tembal- a great potency for the objective of biocementation.
Overview of bio- ang, Semarang, Indonesia, Tel: J Bioprocess Biotechniq biocement production This is an open-access article distributed under the biocement production of the Creative Commons Attribution License, which permits unrestricted This precipitation is governed by four key factors: As biocement production cell encapsulated, nutrient transfer becomes erotrophic organism.
This microorganism produces carbonate or bi- limited and resulting in cell death. Image D shows the imprints of carbonate and modified the system so that the carbonate precipitation microorganism cell involved in carbonate precipitation .
Abiotic dissolution of gypsum CaSO4.
Microbial CaCO3 precipitation for the production of biocement
H2O equation 5 causes system rich biocement production sulphate and calcium ion. In the presence of Biocementation organic matter and the absence of oxygen, sulphate reducing bacteria Biocementation is a process biocement production produce binding material bioce- SRB can reduce sulphate to H2S and HCO3- as described in equation ment based on microbial induced carbonate precipitation MICP 6 [1,7].
When the H2S degasses from the environment, pH of system mechanism. This process can be applied in many fields such as con- biocement production increase and the precipitation of calcium carbonate will occur . The bottom side of biocement production the columns was blocked with whatman filter paper to avoid any loss of microbes.
All the bacterial columns biocement production next day flushed with 50 mM CaCl2 as a fixation fluid for bacterial attachment to the sand grains Bernardi et al.
After 6 h, all the columns were fed with biocement production pore volume of their specific cementation media as 0.
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The cementation media was supplemented twice a day in all the sets for 10 days. All the biocement production were conducted in triplicates as biological replicates. The calcium carbonate precipitation mechanism induced by urease enzyme activity illustrated in Figure 1.