Production development and utilization of Zimmer Station wet FGD by-products. Final report. Volume 6, Field study conducted in fulfillment of Phase 3 titled. Use of FGD by-product gypsum enriched with magnesium hydroxide as a soil amendment

This work addresses the joint management of residual microalgae and pine wood waste through pyrolysis to obtain a solid product for its use as soil amendment and two other by-products (liquid and gaseous) that can be used for energy purposes. Two management routes have been followed. The first route is through the co-pyrolysis of mixtures of both residual materials in several proportions and the later use of their solid fraction for soil amendment. The second route is the pyrolysis of pine wood waste and its direct combination with dried residual microalgae, also using it as soil amendment. The solid fraction assessment shows that from seven solid products (biochar) three stand out for their positive applicability in agriculture as soil amendment. In addition, they also present the benefit of serving as carbon sink, giving a negative balance of CO2 emissions. However, caution is suggested due to biochar applicability being subject to soil characteristics. To ensure the sustainability of the overall process, the energy available in liquid and gaseous fractions has been assessed for covering the drying needs of the residual microalgae in both cases. These results suggest that the pyrolysis process is a sustainable way to manage specific evaluated residues and their products.

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Application of nanofilters for ventilation

International Review of Applied Sciences and Engineering ◽

10.1556/1848.2019.0008 ◽

2019 ◽

Vol 10 (1) ◽

pp. 51-56

Author(s):

Aleš Rubina ◽

Olga Rubinová ◽

Petr Blasinski

Keyword(s):

High Pressure ◽

Pressure Loss ◽

Manufacturing Technology ◽

Production Development ◽

Technical Practice ◽

Development And Utilization ◽

Backing Layer ◽

Application Specific

Nanotechnology is a perspective manufacturing technology, and in the technical fields, it deals with the production, development and utilization of technologies and materials with dimensions in nanometre sizes (1–100 nm). Nanofilters used in the article for filtration purposes consist from a nanolayer which is applied to a coarse textile backing layer, and they are inserted into the frames as conventional textile filters. The most commonly used materials are PP and PE polymers, as well as carbon, glass and metal filters. With the fabrication of nanotechnology-based filter, it is very important to choose materials, polymers with specific properties, which can be used for filtration function of the product itself. The results given in the main article compare the nanofilters with the main representatives of existing filter products currently available on the market. There is a problem with high pressure loss of the nanomaterial, and when we compare them with traditional filters, it is difficult to use them in technical practice, even if there exists the possibility for us to define the material and the thickness of the layer which are adapted to the application-specific application conditions.

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A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial Brines

Membranes ◽

10.3390/membranes10110303 ◽

2020 ◽

Vol 10 (11) ◽

pp. 303

Author(s):

Daniele La Corte ◽

Fabrizio Vassallo ◽

Andrea Cipollina ◽

Marian Turek ◽

Alessandro Tamburini ◽

...

Keyword(s):

Magnesium Hydroxide ◽

Saline Solution ◽

Low Cost ◽

Feed Solution ◽

Ionic Exchange ◽

The North ◽

Novel Technology ◽

Co Precipitation ◽

Exchange Membrane ◽

By Products

A novel technology, the ion exchange membrane crystallizer (CrIEM), that combines reactive and membrane crystallization, was investigated in order to recover high purity magnesium hydroxide from multi-component artificial and natural solutions. In particular, in a CrIEM reactor, the presence of an anion exchange membrane (AEM), which separates two-compartment containing a saline solution and an alkaline solution, allows the passage of hydroxyl ions from the alkaline to the saline solution compartment, where crystallization of magnesium hydroxide occurs, yet avoiding a direct mixing between the solutions feeding the reactor. This enables the use of low-cost reactants (e.g., Ca(OH)2) without the risk of co-precipitation of by-products and contamination of the final crystals. An experimental campaign was carried out treating two types of feed solution, namely: (1) a waste industrial brine from the Bolesław Śmiały coal mine in Łaziska Górne (Poland) and (2) Mediterranean seawater, collected from the North Sicilian coast (Italy). The CrIEM was tested in a feed and bleed modality in order to operate in a continuous mode. The Mg2+ concentration in the feed solutions ranges from 0.7 to 3.2 g/L. Magnesium recovery efficiencies from 89 up to 100% were reached, while magnesium hydroxide purity between 94% and 98.8% was obtained.

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Evaluation of wastewater treatment by-products as soil amendment: Growth of sorghum-sudan grass and trace elements concentrations

Journal of Environmental Science and Health Part A ◽

10.1080/10934529.2012.687261 ◽

2012 ◽

Vol 47 (11) ◽

pp. 1678-1686 ◽

Cited By ~ 7

Author(s):

Paramasivam Sivapatham ◽

Mariel C. Potts ◽

Jeffrey A. Delise ◽

Kenneth S. Sajwan ◽

Ashok K. Alva ◽

...

Keyword(s):

Trace Elements ◽

Wastewater Treatment ◽

Soil Amendment ◽

Sudan Grass ◽

By Products

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