Two-step demineralization of shrimp (Pandalus Borealis) shells using citric acid: An environmentally friendly, safe and cost-effective alternative to the traditional approach

2021 ◽  
Author(s):  
Julia Pohling ◽  
Deepika Dave ◽  
Yi Liu ◽  
Wade Murphy ◽  
Sheila Trenholm
Keyword(s):  
Citric Acid ◽  
Hydrochloric Acid ◽  
Environmental Health ◽  
Traditional Approach ◽  
Health And Safety ◽  
Cost Effective ◽  
Environmental Health And Safety ◽  
Pandalus Borealis ◽  
Chitin Extraction ◽  
Cost Effective Alternative

Removal of minerals from crustacean shells during chitin extraction is traditionally achieved using hydrochloric acid. However, the environmental, health and safety concerns of hydrochloric acid have led to investigation of...

Development of a Phosphate - Free Reticulated Foam Filter Material for Aluminium Cast Houses

2009 ◽  
Vol 630 ◽  
pp. 137-146 ◽  
Author(s):  
Leonard S. Aubrey ◽  
Rudolph Olson ◽  
David D. Smith
Keyword(s):  
Environmental Health ◽  
Health And Safety ◽  
Cost Effective ◽  
Filter Material ◽  
Ceramic Foam ◽  
Aluminium Phosphate ◽  
Environmental Health And Safety ◽  
Material Technology ◽  
Safety Concerns ◽  
Technical Advances

Filtration of molten aluminium using porous reticulated ceramic foam was developed in 1974 by SELEE Corporation. Since that time, there have been significant technical advances in filter bowl design and construction, preheat systems, development of fine pore size filters, development of compact two-stage filtration systems, filter gasket materials, and equipment automation. One area that has remained relatively unchanged has been the refractory filter material technology. The refractory material utilized by all of the major cast house filter suppliers is based on an alumina aggregate grain bonded with aluminium phosphate (AlPO4). This filter material, commonly referred to as “PBA” in the aluminium industry, has become an industry wide standard and accounts for nearly 99% of the filters supplied to cast houses worldwide. There are significant technical limitations of PBA filters in terms of refractory performance, as well as potential environmental, health and safety concerns. This paper describes the development of a cost effective replacement filter material that overcomes the limitations of PBA filters. The new material utilizes a low expansion – low modulus aggregate material and a non-phosphate bond. The result is a significant reduction in mechanical failures during use, improved filtration performance and elimination of the issue of potential environmental, health and safety concerns.

Sign in / Sign up

Export Citation Format

Share Document