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Acidic substances, which produced during chlorinated volatile organic compounds, will corrode the commonly used packing materials, and then affect the removal performance of biofiltration. In this study, three biofilters with different filter bed structure were established to treat gaseous chlorobenzene. CaCO and 3D matrix material was added in filter bed as pH buffering material and filter bed supporting material, respectively. A comprehensive investigation of removal performance, biomass accumulation, microbial community, filter bed height, voidage, pressure drops, and specific surface area of the three biofilters was compared. The biofilter with CaCO and 3D matrix material addition presented stable removal performance and microbial community, and greater biomass density (209.9 kg biomass/m filter bed) and growth rate (0.033 d) were obtained by using logistic equation. After 200 days operation, the height, voidage, pressure drop, specific surface area of the filter bed consisted of perlite was 27.4 cm, 0.39, 32.8 Pa/m, 974,89 m/m, while those of the filter bed with CaCO addition was 28.2 cm, 0.43, 21.3 Pa/m, and 1021.03 m/m, and those of the filter bed with CaCO and 3D matrix material addition was 28.7 cm, 0.55, 17.4 Pa/m, and 1041.60 m/m. All the results verified the biofilter with CaCO and 3D matrix material addition is capable of sustaining the long-term performance of biofilters. CaCO could limit the changes of removal efficiency, microbial community and filter bed structure by buffering the pH variation. And 3D matrix material could maintain the filter bed structure by supporting the filter bed, regardless of the buffering effect.
This article was published in the following journal.
Compost-based biofiltration is a method widely used to mitigate ammonia emissions during composting. To improve the efficiency of a composting-biofiltration system, it is necessary to determine the mo...
Microencapsulation of a carbon nanotubes (CNT)-loaded paraffin phase change material, PCM in a poly(melamine-formaldehyde) shell and the respective CNT-PCM gypsum composites are explored. Although, a ...
The presence of an affiliative conspecific reduces stress responses to a wide variety of stimuli, which is termed "social buffering." We previously reported that social buffering in male rats ameliora...
Wastewaters from the printing and dyeing industries contain many contaminants in particular Antimony (Sb) that end up in the environment. Both manganese sand filter and Fe O have good removal effect o...
Recently, partial denitrification (PDN) - anaerobic ammonium oxidation (anammox) process has been widely studied in activated sludge for nitrate wastewater treatment. However, achieving PDN-Anammox in...
The aim of this study is to prospectively investigate the diagnostic performance and potential radiation dose reduction in coronary artery calcium scoring using the new tin filter system o...
The clinical study will collect data to verify the safety and performance of the Cook Celect Filter in the prevention of pulmonary embolism (PE) in patients with a temporary or permanent h...
The purpose of this experiment is to determine the mechanisms through which parental buffering of stress physiology during aversive conditioning diminishes with pubertal development and wh...
This study was designed to assess the safety of retrieval of the Bard Recovery® G2® Filter System. The G2 filter is an FDA-cleared device for inferior vena caval interruption in patients...
The purpose of this experiment is to determine the mechanisms through which parental buffering of stress physiology in response to social evaluative threat diminishes with pubertal develop...
Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.
Beneficial microorganisms (bacteria or fungi) encapsulated in carrier material and applied to the environment for remediation and enhancement of agricultural productivity.
Homopolymer of tetrafluoroethylene. Nonflammable, tough, inert plastic tubing or sheeting; used to line vessels, insulate, protect or lubricate apparatus; also as filter, coating for surgical implants or as prosthetic material. Synonyms: Fluoroflex; Fluoroplast; Ftoroplast; Halon; Polyfene; PTFE; Tetron.
Performance of an act one or more times, with a view to its fixation or improvement; any performance of an act or behavior that leads to learning.
A white, crystalline powder that is commonly used as a pH buffering agent, an electrolyte replenisher, systemic alkalizer and in topical cleansing solutions.