The use of pig slurry as organic fertilizer in intensive horticulture could be possible after hygienization to avoid contamination products. This research aimed evaluate a mixture tomato waste and rice husk biofilter media reduce NH3, N2O, CO2, CH4 losses from simple low-cost solution for by pH modification. experiment was made system laboratory scale biofilters connected jars filled with raw c...

In the considered foundry emits offgas containing VOCs (especially ethanol). In order to reduce the VOC content, a compost based biofilter has been installed. In this approach, the polluted air stream enters a pre-conditioning chamber where temperature and humidity is adjusted for asphalt factories. Biofilteration has already been well established as an air pollutant control alternative. There ...

Drinking water biofiltration offers the possibility of removal trace level micropollutants from source water. Sand, granular activated carbon (GAC), GAC sandwich (a layer loaded in middle sand bed), and anthracite-sand dual biofilters were set-up duplicate at bench-scale to mimic filtration process real drinking treatment works. During 3-month system operation, five antibiotics (amoxicillin, cl...

Treating NH3-loaded gases is necessary for improved livestock management. Nitrification, the sequential oxidation of NH3 to NO3? via NO2?, an important microbial process effective long-term removal. Denitrification, a respiration that reduces and NO2? N2 under anaerobic conditions, can also contribute nitrogen conversion in biofiltration systems. Understanding these processes imperative control...

We report here the development, validation, and use of three real-time PCR assays to quantify the abundance of the following three groups of tetracycline resistance genes: tet(A) and tet(C); tet(G); and tet genes encoding ribosomal protection proteins, including tet(M), tet(O), tetB(P), tet(Q), tet(S), tet(T), and tet(W). The assays were validated using known numbers of sample-derived tet gene ...

The biological air treatment method is based on the biological destruction of organic compounds using certain cultures of microorganisms. This method is simple and may be applied in many branches of industry. The main element of biological air treatment devices is a filter charge. Tests were carried out using a new-generation laboratory air purifier with a plate structure. This purifier is call...

The performance of biofilters inoculated with the fungus Scedosporium apiospermum was evaluated. This fungus was isolated from a biofilter which operated with toluene for more than 6 months. The experiments were performed in a 2.9 L reactor packed with vermiculite or with vermiculite-granular activated carbon as packing material. The initial moisture content of the support and the inlet concent...

The treatment of gaseous trichloroethylene (TCE) by biotic and abiotic removal mechanisms in a sequential (biological/chemical) reactor system was investigated. The reactor system consisted of a granular anaerobic mixed culture packed biofilter followed by an elemental iron metal (Fe(0)) packed column in series. The effect of empty bed contact time (EBCT) and influent TCE concentration on the T...

Two pilot scale biofiltration systems were constructed and installed at the University College Dublin Research Farm, Lyons Estate. Experimental units consisting of two pens in a 12 pen pig house were sealed off from other pens. Air from each pen was extracted and treated separately in two biofiltration systems. Wood chips larger than 20 mm were selected as the medium for biofiltration system 1,...