scholarly journals Sustainable Extraction of Chitin from Spent Pupal Shell of Black Soldier Fly

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 976
Author(s):  
Yin-Shen Lin ◽  
Shih-Hsiang Liang ◽  
Wen-Lin Lai ◽  
Ja-Xin Lee ◽  
Ya-Peng Wang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Hydrochloric Acid ◽  
Chemical Process ◽  
Chelating Agent ◽  
Microbial Fermentation ◽  
Black Soldier Fly ◽  
Fermentation Method ◽  
Main Disadvantage ◽  
Chitin And Chitosan ◽  
Sustainable Extraction

Chitin and its deacetylated derivative chitosan are used for application in areas as an agriculture, biomedicine, cosmetic, food, textile and chelating agent for wastewater treatment. The current extraction of chitin is based on a chemical process using hydrochloric acid and sodium hydroxide. The main disadvantage of the process is the generation of large volumes of acid and alkaline effluents, which require further treatment before release. Chitin was extracted from spent pupal shell of black soldier fly (BSF) by the microbial fermentation method using Bacillus lichenformis A6. The recovery rate of chitin content by the microbial fermentation method was found to be about 12.4%. The structures of BSF chitin and chitosan were further characterized by FTIR, XRD, and SEM. Our results showed that the chitin obtained from BSF was observed in α form. The crystalline index values of chitin and chitosan are 52.8% and 55.4%, respectively. The surface morphology was examined by SEM, revealing nanofiber structures. The spent pupal shell of BSF may be used as alternative chitin sources for various technological purposes.

The Latest Applications of Chitin and Chitosan in Wastewater Treatment

2013 ◽  
Vol 666 ◽  
pp. 151-157
Author(s):  
Shou Feng Yang ◽  
Hong Cai Zhang ◽  
Yi Xiang Shi ◽  
A Jun Wan
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Molecularly Imprinted Polymers ◽  
Material Science ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Chitin And Chitosan

Chitosan has multiple applications due to its advantages including availability, biocompatibility and biodegradability in food, agriculture, material science and so on. In recent years, chitosan was frequently chosen as absorbent of wastewater and reached a satisfactory effect. It should be noted that it is one of most important links in the environment enhancement chains using chitosan as absorbent of heavy metal in wastewater treatment. Chitosan-molecularly imprinted polymers with favorable absorption ability can meanwhile absorb many heavy metal including Cu2+, Hg+, Mn2+ion, etc. The aim of this paper is to review their latest development in wastewater treatment for providing helpful guidances for researcher in this field.

Research of Treatment Technology for Electroplating Wastewater

2014 ◽  
Vol 487 ◽  
pp. 713-716 ◽  
Author(s):  
Yi Dan Zhou ◽  
Miao Sun ◽  
Li Juan Wang ◽  
Guan Nan Xi
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Electrochemical Method ◽  
Chemical Process ◽  
Biological Treatment ◽  
Chemical Method ◽  
Treatment Technology ◽  
Electroplating Wastewater ◽  
The Common ◽  
Physical And Chemical

The sources and composition of electroplating waste water are summarized. The common wastewater treatment technology, such as physical and chemical method, physic-chemical process, biological treatment and electrochemical method, and so on. Then the vision for the development of electroplating wastewater treatment technology is made.

scholarly journals Mathematical Analysis for the Optimization of Wastewater Treatment Systems in Facultative Pond Indicator Organic Matter

2018 ◽  
Vol 31 ◽  
pp. 05008 ◽  
Author(s):  
Sunarsih ◽  
Widowati ◽  
Kartono ◽  
Sutrisno
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Wastewater Treatment ◽  
Mathematical Analysis ◽  
Hydraulic Retention Time ◽  
Land Area ◽  
Quality Requirements ◽  
Non Linear Programming ◽  
Main Disadvantage ◽  
Wastewater Treatment Systems

Stabilization ponds are easy to operate and their maintenance is simple. Treatment is carried out naturally and they are recommended in developing countries. The main disadvantage of these systems is large land area they occupy. The aim of this study was to perform an optimization of the wastewater treatment systems in a facultative pond, considering a mathematical analysis of the methodology to determine the model constrains organic matter. Matlab optimization toolbox was used for non linear programming. A facultative pond with the method was designed and then the optimization system was applied. The analyse meet the treated water quality requirements for the discharge to the water bodies. The results show a reduction of hydraulic retention time by 4.83 days, and the efficiency of of wastewater treatment of 84.16 percent.

Preparation of Nanometer Titanium Dioxide Adsorbent and its Application in Industrial Wastewater Treatment

2012 ◽  
Vol 573-574 ◽  
pp. 521-525
Author(s):  
Nan Zhang ◽  
Pu Liu ◽  
Ben Quan Fu ◽  
Li Na Wang
Keyword(s):  
Heavy Metals ◽  
Titanium Dioxide ◽  
Wastewater Treatment ◽  
Hydrochloric Acid ◽  
Surface Area ◽  
Industrial Wastewater ◽  
Operating Conditions ◽  
Adsorption Condition ◽  
Removal Of Heavy Metals ◽  
Nanometer Titanium Dioxide

In this paper, nanometer titanium dioxide was synthesized by a simple reaction. The prepared adsorbent was characterized by surface area and porosimetry analyzer and it was used for the removal of heave metals in industrial wastewater. The main parameters affecting the adsorption of heavy metals including pH, adsorption condition and elution condition have been investigated in detail. Under the optimized operating conditions, most of the target heavy metals could be fast removed. The adsorbent could be simply regenerated by hydrochloric acid. Thus, the prepared nanometer titanium dioxide was an adsorbent which is suitable for the removal of heavy metals in industrial wastewater.

scholarly journals A Process for the Preparation of Chitin and Chitosan from Prawn Shell Waste

1970 ◽  
Vol 45 (4) ◽  
pp. 323-330 ◽  
Author(s):  
F Nessa ◽  
Shah Md Masum ◽  
M Asaduzzaman ◽  
SK Roy ◽  
MM Hossain ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Key Words ◽  
Functional Properties ◽  
Chemical Process ◽  
Degree Of Deacetylation ◽  
Careful Control ◽  
Shell Waste ◽  
Chitin And Chitosan ◽  
Physicochemical And Functional Properties

Chitin was prepared from prawn shell waste by a chemical process involving demineralization, deproteinization and decolorization. Chitosan was prepared from chitin by deacetylation. The present study was undertaken to evaluate the influence of deacetylation process during chitosan production on the physiochemical and functional properties of prawn shell chitosan. Four experimental chitosan samples were prepared at ambient temperature with different duration of deacetylation process (i.e. 45, 55, 65 and 72 hrs and their characteristics were evaluated. This study demonstrated that duration of deacetylation affected mostly the degree of deacetylation, solubility and viscosity of the product. Therefore, the process of deacetylation of chitin for conversion to chitosan needs careful control and observation. Key words: Prawn shell; Duration of Deacetylation; Chitosan; Ambient temperature; Physicochemical and Functional properties. DOI: 10.3329/bjsir.v45i4.7330 Bangladesh J. Sci. Ind. Res. 45(4), 323-330, 2010

Modified Clay Adsorbent for the Adsorption of Cd2+ Research

2014 ◽  
Vol 707 ◽  
pp. 195-198
Author(s):  
Jiao Sheng ◽  
Shu Mei Yan ◽  
Xian Feng ◽  
Ai Cui He ◽  
Gui Hua Zeng
Keyword(s):  
Wastewater Treatment ◽  
Rice Bran ◽  
Mass Concentration ◽  
Adsorption Equilibrium ◽  
Microbial Fermentation ◽  
Adsorption Effect ◽  
Equilibrium Time ◽  
Adsorbent Dosage ◽  
Modified Clay ◽  
Adsorption Performance

The modified clay have excellent adsorption performance. This paper discussed the adsorbent dosage, pH, temperature, adsorption equilibrium time and so on the influence of factors on the adsorbent adsorption performance, the results show that the microbial fermentation of rice bran to Cd2+ has good adsorption effect. The best adsorption conditions for: dosage of microbial fermentation of rice bran 18 g/L, temperature 30 °C, pH = 3.8, Cd2 + mass concentration is lower than 50 mg/L, the adsorption equilibrium time 30 min, adsorption rate can reach 93.5%, and its application foreground is prospected in wastewater treatment.

Study on the Removal of Cadmium in Rice Using Microbial Fermentation Method

2017 ◽  
Vol 82 (6) ◽  
pp. 1467-1474 ◽  
Author(s):  
Ling Zhang ◽  
Qunying Lei ◽  
Yuliang Cheng ◽  
Yunfei Xie ◽  
He Qian ◽  
...  
Keyword(s):  
Microbial Fermentation ◽  
Fermentation Method

scholarly journals Biocontrol Potential of Chitin and Chitosan Extracted from Black Soldier Fly Pupal Exuviae against Bacterial Wilt of Tomato

2022 ◽  
Vol 10 (1) ◽  
pp. 165
Author(s):  
Violah Jepkogei Kemboi ◽  
Carolyne Kipkoech ◽  
Moses Njire ◽  
Samuel Were ◽  
Mevin Kiprotich Lagat ◽  
...  
Keyword(s):  
Bacterial Wilt ◽  
Disease Incidence ◽  
Molecular Techniques ◽  
Control Measures ◽  
Pathogenicity Test ◽  
Management Options ◽  
Black Soldier Fly ◽  
Pupal Exuviae ◽  
Significant Difference ◽  
Chitin And Chitosan

Globally, Ralstonia solanacearum (Smith) is ranked one of the most destructive bacterial pathogens inducing rapid and fatal wilting symptoms on tomatoes. Yield losses on tomatoes vary from 0 to 91% and most control measures are unaffordable to resource-poor farmers. This study investigated the antimicrobial activities of chitin and chitosan extracted from black soldier fly (BSF) pupal exuviae against R. solanacearum. Morphological, biochemical, and molecular techniques were used to isolate and characterize R. solanacearum for in vitro pathogenicity test using disc diffusion technique. Our results revealed that BSF chitosan significantly inhibited the growth of R. solanacearum when compared to treatments without chitosan. However, there was no significant difference in the antibacterial activities between BSF and commercial chitosan against R. solanacearum. Soil amended with BSF-chitin and chitosan demonstrated a reduction in bacterial wilt disease incidence by 30.31% and 34.95%, respectively. Whereas, disease severity was reduced by 22.57% and 23.66%, when inoculated tomato plants were subjected to soil amended with BSF chitin and chitosan, respectively. These findings have demonstrated that BSF pupal shells are an attractive renewable raw material for the recovery of valuable products (chitin and chitosan) with promising ability as a new type of eco-friendly control measure against bacterial wilt caused by R. solanacearum. Further studies should explore integrated pest management options that integrate multiple components including insect-based chitin and chitosan to manage bacterial wilt diseases, contributing significantly to increased tomato production worldwide.

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