OH “RADICAL” WATER TREATMENT

The Product

Electrolytic Oxidation Systems for Industrial Waste Water Treatment

The Application

Industrial production processes produce different effluents that are either treated in house, Waste Water Treatment Plants (WWTP) or disposed of externally. In most cases Chemical Oxygen Demand (COD) plays an essential role. Costs for waste water discharge are often based on COD value, fish toxicity or the content of poorly degradable substances in general.

Wastewater with high pollution loads or hard to degrade substances are often sent to incineration. Disposal costs can exceed $ 200 – $ 250/ton.

The Process

Hydroxyl radicals (•OH) are strong oxidants, they are used to treat dissolved pollutants in processes known as advanced oxidation processes (AOPs). These water treatment techniques can eliminate almost all types of toxic and hazardous dissolved organic compounds in an aqueous phase via oxidation.

Heger Diamond’s novel Water Treatment Process of Electrolytic Oxidation helps combat high disposal costs. Compared with incineration or other treatment using chemical/physical processes our Electrolytic Oxidation with BDD electrodes (Boron Doped Diamond) have already reduced operating costs by up to 50% in many cases.

Treating effluent with BDD electrodes leads to increased bio-availability, better discharge values and breakout of and the possible recycling of molecular components.

Process leftovers are Water (H2O), Carbon Dioxide (CO2) and Salts

The Advantages

  • Complete oxidation of the wastewater

  • No use of hazardous chemicals (H2O2)

  • Lower COD / TOC

  • Excellent energy efficiency

  • Low maintenance

  • no loss of performance

  • Easy installation, easy control

  • Integration into existing technologies

 

The Solution

Electrolytic Waste Water Oxidation with the use of BDD generates highly reactive oxidizing agents (•OH, H2O2, O3) from water molecules. The picture below shows a typical BDD system for Water Treatment with •OH radicals.

The water flows through the BDD electrode system (full or partial flow) and the oxidizing agents (•OH, H2O2, O3) form directly in the water which ensures full contact.

Methods of treating water:

  1. straining
  2. flotation
  3. filtration
  4. lime softening
  5. sedimentation
  6. clarification
  7. distillation
  8. active carbon
  9. aeration
  10. flocculation
  11. chlorination
  12. ozonation
  13. ultraviolet light
  14. coagulant aids (polymers)

all or some of these methods are used in the treatment of water.  We differentiate between physical, chemical and biological treatment options.

As a first step we will take out the solid loading of a treatment stream, skim fat, break emulsions, reduce oxygen demand, add flocculents for suspended solids, add chemicals for disinfection or to kill/remove bacteria, viruses algae, fungi etc..

If these steps are not enough or to treat liquids loaded with organic compounds (pharmaceutical, chemical, oil & gas, food, cosmetic plant water & waste streams, hormones, hydro carbons, chemical laden waste streams etc.) more treatment steps are needed.

Welcome to Waste Water Treatment with Heger Diamond

OH Radicals attack anything organic and dissolve it into Carbon Dioxide (CO2) and Water (H2O)

The hydroxyl radical, OH, is the neutral form of the hydroxide ion (OH−). Hydroxyl radicals are highly reactive (easily becoming hydroxyl groups) and consequently short-lived; however, they form an important part of radical chemistry. The hydroxyl radical is often referred to as the “detergent” of the troposphere because it reacts with many pollutants, decomposing them through “cracking”, often acting as the first step to their removal.

Heger Diamond Electrodes produce OH Radicals,  Hydrogen Peroxide H2O2, Ozone O3, and other compounds that help to break (crack open) organic compounds.

Hydroxyl radicals play a key role in the oxidative destruction of organic pollutants using a series of methodologies collectively known as Advanced Oxidation Processes (AOPs). The destruction of pollutants in AOPs is based on the non-selective reaction of hydroxyl radicals on organic compounds. It is highly effective against a series of pollutants including pesticides, pharmaceutical compounds, dyes, etc.

Organisms (viruses, bacteria, fungus) and OH Radicals

The hydroxyl radical can damage virtually all types of macromolecules: carbohydrates, nucleic acids (mutations), lipids (lipid peroxidation), and amino acids (e.g. conversion of Phe to m-Tyrosine and o-Tyrosine). The hydroxyl radical has a very short in vivo half-life of approximately 10−9  seconds and a high reactivity. This makes it a very dangerous compound to any organism. (see washing citrus)

Unlike superoxide, which can be detoxified by superoxide dismutase, hydroxyl radicals cannot be eliminated by an enzymatic reaction.