biological oxidation Applications

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Municipal wastewater solutions for biological treatment industry

by WesTech Engineering, Inc.     based in Salt Lake City, UTAH (USA)

A well-designed wastewater plant starts with your effluent requirements and an energy-efficient biological process. WesTech has multiple biological process options to match your application and preference. From trickling filters to oxidation ditches, WesTech`s biological process equipment will give you the effluent quality you need and the foundation for a successful wastewater plant.

Sulfide Oxidation with Hydrogen Peroxide (H2O2)

by USP Technologies     based in Atlanta, GEORGIA (US) (USA)

Sulfide Odor Control Sulfide is found throughout the environment as a result of both natural and industrial processes. Most sulfide found in nature was produced biologically (under anaerobic conditions) and occurs as free hydrogen sulfide (H2S) - characterized by its rotten egg odor. We are most likely to encounter biogenic H2S in sour groundwaters, swamps and marshes, natural gas deposits, and sewage collection/treatment systems. Manmade sources of H2S typically occur as a result of natural materials containing sulfur (e.g., coal, gas and oil) being refined into industrial products. For a variety of reasons - aesthetics (odor control), health (toxicity), ecological (oxygen depletion in receiving waters), and economic (corrosion of equipment and infrastructure) - sulfide laden wastewaters must be handled carefully and remediated before they can be released to the environment. Typical discharge limits for sulfide are < 1 mg/L. Sulfide Treatment Alternatives There are dozens of alternatives for treating sulfide laden waters, ranging from simple air stripping (for the low levels present in groundwaters) to elaborate sulfur recovery plants (used to treat several tons per day at refineries and coal burning power plants). There are processes based on biology (using compost filters, scrubbing media, or inhibition/disinfection), chemistry (oxidation, precipitation, absorption, and combination), and physics (adsorption, volatilization, and incineration). Each process occupies a niche which is often defined by the scale and continuity of treatment, whether the sulfide is in solution or is a gas, the concentration of sulfide involved, and the disposition of the sulfide containing medium. However, for reasons relating to convenience and flexibility, chemical oxidation (using hydrogen peroxide) continues to grow in its scope of application. Treatment with Hydrogen Peroxide While other peroxygens such as permonosulfuric (Caro’s) acid, peracetic acid, and persulfates will oxidize sulfide, their use for this application is overkill. Hydrogen peroxide (H2O2) is considerably simpler and more cost-effective. H2O2 may control sulfides in two ways, depending on the application: Prevention - by providing dissolved oxygen which inhibits the septic conditions which lead to biological sulfide formation; and Destruction - by oxidizing sulfide to elemental sulfur or sulfate ion.

Waste to Energy

by Babcock & Wilcox MEGTEC     based in De Pere, WISCONSIN (USA)

We can treat the air streams from waste management plants, MBT (Mechanical Biological Treatment) reception and composting areas, Waste Water Treatment Plants (WWTP), Refuse Derived Fuel (RDF) Plants, gasification of waste, syngas, torrefaction, gas engines and biogas upgrading. In waste management plants and WWTP, we remove the odors that may be causing a nuisance to neighbors, with bioreactors using Biomass to degrade odorous components and where odors are particularly intractable or VOC emissions higher, thermal oxidizers to meet prescribed emission limits and odor levels. In RDF Plants, Syngas, Gasification, Gas Engine and Biogas Upgrading applications, we employ thermal oxidizers, particulate removal and DeNOX systems, for the control of VOC, NOx, CO and particulates to prescribed emission limits.

Process Design

by Yates Environmental Services     based in Spokane, WASHINGTON (USA)

Custom water and wastewater engineering, consulting and process design services to prevent air, land, water and environmental pollution. We rework systems as processes change and troubleshoot where necessary to bring systems into compliance. • High purity and process water • Biological nutrient removal • Solids treatment • Toxicity reduction • Industrial treatment • Advanced oxidation and alternative disinfection • Effluent reclamation and reuse • Land application systems • Natural treatment systems • Hydrogen sulfide and odor control • Decentralized treatment systems • Process optimization / operations assistance • Conceptual and strategic water planning

Environmental Monitoring - Water Screening for Pollutants - Pesticide Screening

by Biosensor     based in Formello, ITALY

Water screening for the detection of pollutants owning to large classes of chemical compounds such as triazine, fenylurea, diazine and phenolic pesticides can be performed. The presence of environmental pollutants can be determined utilizing biological materials such as photosynthetic biomediators (Plants, Algae, Cyanobacteria) and enzymes (e.g. Laccase or Tyrosinase). AMPBIO-ITO Light provides amperometric measurements performed on electro-active biological material suspended, deposited or grown on an Indium Tin Oxide (ITO) electrode, before and after the injection of the analyte under test. OPTICBIO-Multicell Survival optical is based on multicell arrays for biological material survival/storage and fluorescence measurement for the control of the physiological activity.

BOD and COD Removal

by USP Technologies     based in Atlanta, GEORGIA (US) (USA)

Hydrogen peroxide (H2O2) has been used to reduce the BOD and COD of industrial wastewaters for many years. While the cost of removing BOD / COD through chemical oxidation with hydrogen peroxide is typically greater than that through physical or biological means, there are nonetheless specific situations which justify the use of hydrogen peroxide. These include: Predigestion of wastewaters which contain moderate to high levels of compounds that are toxic, inhibitory, or recalcitrant to biological treatment (e.g., pesticides, plasticizers, resins, coolants, and dyestuffs); Pretreatment of high strength / low flow wastewaters – where biotreatment may not be practical – prior to discharge to a Publicly Owned Treatment Works (POTW);Enhanced separation of entrained organics by flotation and settling processes; and Supply of supplemental Dissolved Oxygen (DO) when biological treatment systems experience temporary overloads or equipment failure. http://www.h2o2.com/industrial/applications.aspx?pid=104&name=BOD-COD-Removal

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