A dynamic model to describe ammonia removal in a gas-phase biofilter was developed. The mathematical model is based on discretized mass balances and detailed nitrification kinetics that include inhibitory effects caused by free ammonia (FA) and free nitrous acid (FNA). The m I a s ©

Biomass and microbial activity in backwashing processes of a biofilter for tertiary treatment were investigated. The microbial groups revealed new distribution along the biofilter depth after low flow rate backwashing for a short time. Then the start-up process was accelerated by backwashing. The biomass profile and microbial activity profile both varying with depth before and after backwashing...

Abstract The aim of this study was to investigate the control three species bacteria commonly associated with biologically contaminated water, using biofiltration. In study, a laboratory-scale biofilter system used Escherichia coli , Enterococcus faecalis and Pseudomonas aeruginosa in fresh water. Simulated water inoculated test pathogens at starting inocula ~1000 CFU 100 mL −1 challenge biofil...

Biofiltration for drinking water treatment has several quality benefits but questions remain about biofilter start-up in temperate climates where temperature and changes can impact performance. A year-long full-scale demonstration was performed with biofilters operated parallel to chlorinated filters (O1) monitor the development of microbiota across acclimation period respect removal Mn total o...

In order to evaluate the performance of biofilter for H2S removal from contaminated air, a 120×14 cm column biofilter was constructed using clear polyacrylic material in conjunction with H2S production and control systems. The column was divided into four stages using perforated plates. The column was packed with a mixture of mushroom compost and snail shell (4:1).&#10 The performance of biofil...

In this study a general dynamic biofiltration model to describe ammonia removal in a gas-phase biofilter is developed. The mathematical equations are based on discretized mass balances and detailed nitrification kinetics that include inhibitory effects caused by free ammonia (FA) and free nitrous acid (FNA). The model was able to predict experimental results operation under different loading ra...

Isopropyl Alcohal (IPA) is flammable, clear, colorless liquid and is slightly odorous. IPA has wide applications in various industries such as paint, pharmaceutical, lithography, rubber manufacture, semiconductor, and printing industries. It is one of the components of many antiseptic and cosmetic products. The exposure of high concentrations of IPA can cause depression in central nervous syste...

The removal of volatile organic compounds (VOC) in biofilters packed with organic filter beds, such as peat moss (PM) and pine sawdust (PS), frequently presents drawbacks associated to the collapse of internal structures affecting the long-term operation. Poly(ethylene ether carbonate) (PEEC) groups grafted to these organic carriers cross linked with 4,4'-methylenebis(phenylisocyanate) (MDI) pe...

Biofiltration is an effective technology for the treatment of gaseous waste. However, a biofiltration system needs a bioreactor of large volume and it is slow to adapt to fluctuating concentrations in waste gas. To overcome these disadvantages, a bench-scale system integrating a biofilter and an adsorption unit for the treatment of gases containing o-xylene was investigated in this study. The a...