Formaldehyde is a dangerous compound that must eliminate from contaminated air. Different methods exist for removal of pollutants from the air that among them, the biological processes attracted a great deal of attention. Removal of formaldehyde from the contaminated air was investigated in three laboratory-scale biofilters packed with different materials (a mixture of compost and woodchips, th...

A biofilter with fungus was developed for efficient degradation of benzene, which can overcome the potential risk of leakage commonly found in such services. Results indicated that the optimum parameter values were temperature 40 °C, pH 6, and 500 mg L-1 of the initial benzene concentration. Besides, the empty bed residence time and inlet load range of biofilter were set to 20 s and 21.23-169.8...

laboratory scale experiments were performed to evaluate the feasibility of biofilters for the removal of h2 s from wastewater treatment plant waste air. the effects of changes in air flow rate and contaminant concentration on biofilter performance treating h 2 s odours were also assessed. compost was used as media in biofilter. the study was carried out in six different phases, by increasing h2...

Preliminary studies on the performance of a laboratory scale perlite biofilter inoculated with a mixed culture taken from petrochemical refinery sludge was evaluated for gas phase styrene removal under various operating conditions. Initially, the biofilter was acclimatized for 53 days at constant loading rates (40-60 g/m.h), wherein the performance gradually improved with fluctuations in the re...

The performance of two laboratory-scale biofilters packed with pressmud (BF1) and sugarcane bagasse (BF2) was evaluated for gas-phase xylene removal under various operating conditions. Biofilter was inoculated with a mixed culture obtained from pharmaceutical sludge. Experiments were carried out at different flow rates (0.03, 0.06, 0.09 and 0.12 m h) and inlet xylene concentrations (0.2, 0.4, 0...

Limbah cair tahu dapat menimbulkan pencemaran karena terdapat kandungan biological oxygen demand (BOD), chemical demond (COD), dan total suspended solid (TSS) yang sangat tinggi mencemari lingkungan sekitar apabila dibuang ke sungai. Sebab itu kadarnya harus diturunkan sebelum sungai sekitar. Yaitu dengan cara mengolah limbah biofilter. Biofilter digunakan yaitu bermedia filter batu krikil kora...

The performance of a laboratory scale perlite biofilter inoculated with a mixed culture was evaluated for gas phase styrene removal under various operating conditions. Experiments were carried out by subjecting the biofilter to different flow rates (0.15-0.9 m(3)h(-1)) and concentrations (0.03-17.3 gm(-3)), corresponding to inlet loading rates varying from as low as 3 gm(-3)h(-1) to as high as ...

Gas mixture of H2S and NH3 in this study has been the focus in the research area concerning gases generated from the animal husbandry and the anaerobic wastewater lagoons used for their treatment. A specific microflora (mixture of Thiobacillus thioparus CH11 for H2S and Nitrosomonas europaea for NH3) was immobilized with Ca-alginate and packed inside a glass column to decompose H2S and NH3. The...

Background & Aims of the Study: Hydrogen sulfide (H2S) is a colorless and highly toxic, easily dissolved in water, flammable and explosive gas. Hydrogen sulfide gas is the main cause of odor emissions from municipal sewage plants. One method for removal of hydrogen sulfide gas is the use of biological systems, biofilter. The aim of this study was to survey removal hydrogen sulfide provide in se...

A biofilter was used to treat air polluted with ethylbenzene. Macadamia nutshells, which are a cheap waste product in Thailand, were chosen as the packing material for the biofilter. The moisture content (6.6 w%), water holding capacity (16.8 w%), nutshell density (1.3 g ml) and organic content (78.0 w%) of the macadamia nutshell were measured. The biofilter was operated during 5 months, in whi...