Water and Wastewater Treatment
Nothing is more important than safe, clean water. Evonik's portfolio of environmental treatment technologies includes safe chemistries to eliminate impurities and disinfect water. More importantly, our water treatment chemistries are backed by the robust technical expertise and years of experience of our scientists.
Different methods for the purification of water and wastewater
We understand the need to disinfect wastewater with treatment chemicals that address industry concerns: safety, toxicity, by-product formation, and cost. That’s why we’ve developed VIGOROX® WWT II wastewater disinfection technology, the environmentally responsible and economically minded alternative disinfectant. VIGOROX® WWT II, a formulation containing 15% peracetic acid and 23% hydrogen peroxide, represents an innovative solution in wastewater treatment.
We have recently worked with the Standard Methods Organization and other industry professionals for the examination of water and wastewater to develop a method for the analysis of peracetic acid (PAA) residuals. This PAA-specific method enables wastewater professionals to accurately measure residuals in a plant’s outflow in order to meet their National Pollutant Discharge Elimination System permit. Method 4500-PAA is now available for use and can be found at: standardmethods.org.
Hydrogen peroxide is a strong oxidizing agent that is used in pre-oxidation for algae control, precipitation of iron and manganese, and the oxidation of many kinds of dissolved substances, both organic and inorganic.
Furthermore, in biologically active wastewater, hydrogen peroxide readily decomposes to water and oxygen. The release of oxygen can assist in biological oxygen demand (BOD) reduction by allowing the aerobic bacteria to function more efficiently.
This mechanism is especially important in cases where an oxygen deficiency exists due to high biological oxygen demand, chemical oxygen demand (COD), total organic carbon (TOC) loadings, or insufficient aeration.
In the advanced oxidation process (AOP), hydrogen peroxide is activated by additional components such as iron salts (Fenton's reagent), ozone, or ultraviolet light. AOP technology is one of the most commonly applied approaches for industrial wastewater treatment. It is successfully used for the degradation of recalcitrant pollutants in various refinery effluents and wastewater especially from chemical or pharmaceutical facilities.
The high efficiency and effectiveness of this process is based on the oxidation power of highly reactive hydroxyl radicals, which are formed by the activation of hydrogen peroxide.
Water recycling is highly important for saving drinking water and reducing wastewater. In many applications, it is even possible to recycle the process or rinse water.
Yet the presence of biodegradable organic compounds can result in the proliferation of microorganisms along with associated visual and and odor changes. For example, car wash facilities that recycle the majority of their washing water can prevent the development of bad odors by continuously dosing small amounts of biocides such as peracetic acid into the recycled water. A shock dosage of peracetic acid is also possible in cases of acute odor issues. Yet after destroying undesirable microorganisms, peracetic acid breaks down into nothing but water, oxygen, and vinegar — and is thus as gentle to the environment as it is fierce to microbes.
Peracetic acid thus performs double duty for sustainable water use: It enables water savings through effective recycling while leaving no harmful residues in the environment.
VIGOROX® WWT II is a strong chemical disinfectant for use in wastewater treatment that can replace other chemistries that leave toxic by-products or methods such as UV disinfection. VIGOROX® WWT II, a peracetic acid-based formulation, is an equilibrium mixture of acetic acid (vinegar), hydrogen peroxide and water. The resulting solution contains a mix of 15% peracetic acid (PAA) and 23% hydrogen peroxide.
The peracetic acid molecule is a strong oxidant that, similar to chlorine, will attack and kill pathogenic organisms of concern in wastewater treatment such as E-coli, fecal coliforms and Enterococci by disruption of the cell membrane.
VIGOROX® WWT II is offered as a complete solution including chemical supply; storage, feed and control equipment; and installation, startup and maintenance services.
VIGOROX® WWT II has several other attributes that make it desirable as a wastewater disinfectant, including its ease of operation, lower toxicity to aquatic life, low capital costs, efficacy against a broad range of pathogens, and rapid disinfection rate.
- A proven, powerful alternative disinfectant that leaves no toxic by-products (THMs)
- Broad spectrum biocide
- A compliance guarantee and turnkey solution
BROAD SPECTRUM BIOCIDE
VIGOROX® WWTII is a highly effective biocide demonstrating superior microbial reductions of fecal coliform compared to other chemistries at lower usage rates and shorter contact times, producing no toxic by-products (THMs).
- No need to de-chlorinate prior to discharge
- Low capital storage and handling systems
- Effective over a wide pH range
- Effective in turbid waters
- Primary, secondary, or tertiary effluent treatment
- CSO / Storm water
- Re-use streams
- Enhancement of UV systems
Formulations of peracetic acid are effective against a wide range of harmful aquatic organisms and to those which cause problems in industrial processes. Peracetic acid solutions are used for a wide range of water purification applications such as the treatment of cooling water and industrial or municipal waste water. Waste water is usually disinfected prior to discharge to remove pathogenic species. Peracetic acid-based disinfectants offer a residue-free alternative that prevents the formation of toxic side products.
PERACLEAN® Vanguard is an environmentally friendly technology that utilizes peracetic acid to eliminate metals, tri-halogenated forming organic compounds, and contaminants of concern, as well as to reduce biological oxygen demand prior to terminal disinfection for drinking water applications. Peracetic acid is a strong oxidant used in many industrial settings to eliminate unwanted water contaminants, and its oxidative power can be deployed in the treatment of drinking waters. PERACLEAN Vanguard is NSF® approved as an oxidant and membrane cleaner and is certified organic.
B-Cap® antimicrobial agents are EPA registered and may be used for biofouling control in cooling and process water systems, as a paper mill biocide and for general slime control. Some grades are registered for manufacturing and can be used in any FIFRA registered product formulation using hydrogen peroxide as an active ingredient.
OHP® Grade hydrogen peroxide is an environmentally safe grade of hydrogen peroxide specially developed for its use in OHP wastewater treatment plants or in Fenton chemical oxidation treatment processes for reduction of COD and TOC in wastewaters. A clear, transparent and slightly viscous liquid, it is completely miscible in water in all proportions. It has been proven stable at room temperature and it does not create residue when it decomposes into water and oxygen.
OxyPure® is used for removal of iron and hydrogen sulfide in ground water, for taste and odor control, and for destroying ozone and chlorine residuals in potable water treatment. OxyPure® hydrogen peroxide is the National Sanitary Foundation (NSF) approved product for drinking water applications.
Removal of iron: OxyPure® is effective in oxidation and precipitation of iron by oxidizing the iron to form dense, easily removable solids. Iron could otherwise discolor water, spot laundry, stain plumbing fixtures, and, if bacteria were to grow, cause an abnormal taste, odor, and biofouling of the water system.
Removal of hydrogen sulfide (H2S): OxyPure™ can oxidize the H2S commonly found in underground potable water sources and remove the taste and odor associated with sulfides.
Use for residual ozone destruction: It can be added to ensure destruction of small quantities of residual ozone that could be otherwise released into the atmosphere during certain water treatment plant stages.