HEXANE VAPORS ADSORPTION BY KAPOK AND RAYON INDUSTRIAL WASTE
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL, ENVIRONMENTAL AND BIO-TECHNOLOGY
Author(s): SUTHA KHAODHIAR , RAMNAREE NETVICHIEN , RATTANA TANABOONKAN
Abstract: Air pollution is a global concern because it can contribute to serious health and environmental impacts. Various techniques have been used to mitigate air pollution. One of the popular techniques is adsorption. This research studied hexane vapor adsorption by adsorbents prepared from a mixture of kapok fiber and waste from rayon industry in fixed bed. The Effect of physical parameters, such as adsorbent types, gas flow rate and packing styles on adsorption efficiency was investigated and the results were compared to commercial adsorbents. Kapok fiber is a hollow fiber and has hydrophobic characteristics that are advantages for use as adsorbent because of the high surface area and the affinity for organic compounds. Rayon fiber is used to improve the strength of adsorbents. The adsorbent was prepared by various concentrations of phosphoric acid, 10, 30 and 50 percent. The adsorbents characteristics, including structure, chemical composition, surface area, humidity and density were deter
- Publication Date: 09-Mar-2014
- DOI: 10.15224/978-1-63248-001-9-24
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STRUVITE FORMATION FROM SWINE FARM EFFLUENT
Published In: INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL, ENVIRONMENTAL AND BIO-TECHNOLOGY
Author(s): SUTHA KHAODHIAR , RAMNAREE NETVICHIEN , THONGCHAI UMPORNPANGA
Abstract: The swine farm effluent that is released into the environment, contained high nutrients concentrations such as nitrogen and phosphorus. This research studies the efficiency of swine farm effluent treatment using a laboratory-scale continuous reactor without alkali and Mg2+ addition to promote struvite precipitation and crystallization processes. The study investigates the effect of aeration rate and hydraulic retention time (HRT) on struvite crystallization. The swine farm effluent pH is increased due to CO2 stripping processes by added air in the reactor. The struvite formation was determined by SEM, SEM-EDS and XRD. The result shows that solution pH was increased with increasing aeration rate. At the 23 hours HRT experiment, the equilibrium solution pH was 8.43, 8.56, 8.71, 8.98 and 9.41, respectively. The efficiency of phosphorus removal was 64 – 69 percent and nitrogen removal was 36 – 74 percent. The struvite precipitated was found when effluent pH was 8.5 – 9.0.
- Publication Date: 09-Mar-2014
- DOI: 10.15224/978-1-63248-001-9-25
- Views: 0
- Downloads: 0