biofilter containment Articles

  • Biofilters vs Asdorption

    In the last three decades biological technologies have emerged as a sustainable and economically-viable alternative compared to traditional techniques like adsorption/absorption for purifying gases. They were well-received initially in the industry and interesting products with good results were carried out for several years. However, owing to a series of reasons that will be detailed in this ...


    By Bioconservacion SA

  • Biotreatment of waste gas containing pyridine in a novel rotating rope biofilter

    A novel Rotating Rope Biofilter (RRB) has been developed especially for the treatment of Volatile Organic Compounds (VOCs) at higher loadings and characterised by high volatility along with high water solubility. The RRB provides a higher interfacial area (per unit reactor liquid volume) along with high oxygen mass transfer rate, greater microbial culture stability, and consequently higher ...


    By Inderscience Publishers

  • Performance evaluation of an aerobic biofilter with high organics containing synthetic wastewater

    The organics removal performance of a lab-scale aerobic biofilter of volume 0.6 L was studied using synthetic wastewater and waste automobile tyre-tube beads as media. The column study was performed under Chemical Oxygen Demand (COD) in the range of 500-1500 mg/L at an empty bed contact time (EBCT) of 2 h. The treatability constant at 27°C was found to be 41.963. A maximum COD removal efficiency ...


    By Inderscience Publishers

  • Comparison of the biological NH3 removal characteristics of a three stage biofilter with a one stage biofilter

    A three stage and a one-stage bench-scale biofilter with effective heights of 129 cm filled with same type of packing material were operated at different influent concentrations of ammonia in order to investigate their performance in treating waste gas streams. The columns contained a mixture of municipal compost inoculated with thickened municipal activated sludge as a base material and shredded ...

  • Methane oxidation in water-spreading and compost biofilters

    This study evaluated two biofilter designs to mitigate methane emissions from landfill vents. Water-spreading biofilters were designed to use the capillarity of coarse sand overlain by a finer sand to increase the active depth for methane oxidation. Compost biofilters consisted of 238-L barrels containing a 1: 1 mixture (by volume) of compost to expanded polystyrene pellets. Two replicates of ...


    By SAGE Publications

  • Preliminary stabilisation of stormwater biofilters and loss of filter material

    Stabilisation affects performance of stormwater biofilters operating under intermittent wetting and drying, mainly due to wash-off of filter material. Understanding the dynamics of solids wash-off is crucial in designing stormwater biofilters. The current study analysed the dynamics of solids wash-off in stormwater biofilters and quantified the loss of solids from the filter. Four Perspex™ ...


    By IWA Publishing

  • Pilot-Scale Biofilter Test for Treating Zimpro Odors

    The thermal sludge conditioning process of U.S. Filter/Zimpro Corporation, Rothschild, Wisconsin (Zimpro process) is primarily used to improve dewatering characteristics of the waste sludge. The process entails a partial breakdown through oxidation and hydrolysis of complex, high molecular weight organic compounds, such as, proteins, fibers, carbohydrates, and fats. The partial breakdown of ...


    By PRD Tech, Inc.

  • Simultaneous removal of parathion and methyl parathion by genetically engineered Escherichia coli in a biofilter treating polluted air

    A biofilter inoculated with a genetically engineered Escherichia coli strain was successfully applied to treat air streams containing a mixture of parathion and methyl parathion (MP). Average removal efficiencies of 95.2% for parathion and 98.6% for MP were obtained during the overall operation period. Compared with conventional biofilters, the biofilter inoculated with the engineered E. coli ...


    By Inderscience Publishers

  • Odour control case study

    A Scottish maggot farm, supplying bait for fishing, faced the problem of dealing with ammonia odours emitted during production. The Scottish Environmental Protection Agency (SEPA) had given the company an emissions discharge consent level of a demanding 5ppm of ammonia. To achieve this the maggot farm commissioned a biofilter to remove the pollutants from the air stream. The design of the ...


    By Cleveland Biotech Ltd.

  • Onsite wastewater nitrogen reduction with expanded media and elemental sulfur biofiltration

    A passive biofiltration process has been developed to enhance nitrogen removal from onsite sanitation water. The system employs an initial unsaturated vertical flow biofilter with expanded clay media (nitrification), followed in series by a horizontal saturated biofilter for denitrification containing elemental sulfur media as electron donor. A small-scale prototype was operated continuously over ...


    By IWA Publishing

  • Dissolved organic nitrogen (DON) in a full-scale drinking water treatment plant

    Dissolved organic nitrogen (DON) is currently considered as one of the most important parameters in drinking water treatment due to its potential to form toxic nitrogenous disinfection by-products (N-DBPs). A comprehensive investigation was made in this study on the variation of DON in a full-scale drinking water treatment plant with a treatment train of coagulation/sedimentation, biofiltration ...


    By IWA Publishing

  • Biofiltration: An Innovative Technology for The Future

    Biofiltration refers to the biological transformation or treatment of contaminants present in the gas phase, usually air. The fact that air contaminants can be biodegraded by active bacteria has been known for quite some time. However, it is only in the last 10 years, that biofiltration has begun to emerge as an economically viable treatment process. Initially, biofiltration involved the use of ...


    By PRD Tech, Inc.

  • Biological treatment of pharmaceutical wastewater from the antibiotics industry

    Pharmaceutical wastewater generated by an antibiotics (penicillin) company was treated by aerobic membrane bioreactors (MBRs) and sequencing batch reactors (SBRs). At a low organic loading rate of 0.22 kg-COD m−3d−1, both types of reactors were capable of treating the wastewater such that the treated effluent met the discharge regulation except for the total dissolved ...


    By IWA Publishing

  • Nitrate removal from water by immobilized bacteria

    Nitrate may reach surface and ground waters as a consequence of agricultural activity and discharge of domestic and industrial waste. Among the various methods used for nitrate removal, denitrification, a process in which nitrate is biologically reduced to elemental nitrogen, is relatively reliable and inexpensive as compared to other physical and chemical nitrate removal processes. ...


    By IWA Publishing

  • Odor Control Advances at Composting Facility

    The Rockland County (New York) Cocomposting Facility began operations in February, 1999, processing biosolids from the five publicly owned treatment works (POTWs) in the county. The Rockland County Solid Waste Management Authority (RCSWMA) owns the facility, but contracted with Waste Management of New York to design, build and operate (DBO) the 110 wet tons/day agitated bin composting facility ...


    By BioCycle Magazine

  • Design, Construction, Installation, and Operation of a Compact Bio-Oxidation System to Manage Odors at the City of Wilsonville WWTP

    ABSTRACTThe 5 mgd Wilsonville WWTP was experiencing odor complaints from the adjacent residential neighborhood. An existing in-ground, bark and wood-chip biofilter was not performing well. In December 2004, the City of Wilsonville contacted BioReaction Industries (BRI) requesting the design of a bio-oxidation system with guaranteed performance criteria. The project required an understanding of ...

  • Case study - Hong Kong

    To meet the forecasted increases in demand for potable water, the new Tai Po Water Treatment Works has been built in Hong Kong. The plant has a production capacity of 1200 Ml/day This solution strongly reduced the chlorine demand for the plant compared to the alternative execution with break point chlorina The water treatment works takes water from the river Dongjiang in the Guangdong ...


    By Filtralite - Leca Norge As

  • Affordable new compost technology provides in-vessel levels of gas emission and odor control

    Increasingly stringent air-emission regulations and demands to better control odors has put an economic strain on industries that recycle large amounts of organic materials, such as compost facilities, dairies, and feedlots. ECS has recently introduced an affordable composting technology to greatly improve facility compliance and odor control. This technology is the AC Composter. Air Quality ...

  • Porous Bio-Filters - Tools to Fight West Nile Virus

    The year 2002 brought a disturbing upward trend of West Nile Virus cases to the United States, resulting in more than 232 deaths in 2002, just 3 years since first detected within our borders. This virus is carried by mosquitoes, which thrive in pools of stagnant water – large and small. Large bodies of water can be treated rather easily, by adding predators of the larvae, or chemicals. ...


    By Invisible Structures, Inc.

  • Removal of methyl tertiary butyl ether (mtbe) vapour from contaminated air streams using different bacterial cultures in biotrickling filters.

    Methyl tertiary butyl ether (MTBE) was firstly introduced in the Islamic Republic of Iran in the end of 2001 as gasoline octane enhancer. Ordinary, reformulated gasoline contains 11-15% (v/v) of MTBE. Because of its low production cost and excellent blending characteristics, its production has been grown exponentially in the world, reaching a value of over 33 million tons per year (Fortin and ...


    By University of Tehran

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