Liquid Phase Treatment
- Air and Oxygen. Most odors in wastewater systems can be prevented by maintaining aerobic conditions. It is difficult to...
- Oxidizers. In addition to air and oxygen, other oxidizers can be used to chemically attack odor-causing compounds.
- Nitrates. When oxygen in wastewater is depleted, microorganisms will preferentially reduce nitrates before...
Full Answer
How effective is your wastewater odor control?
Safe Wastewater Odor Control
- Nontoxic, biodegradable, non-combustible
- No volatile organic compounds (VOCs)
- Plant-based and organic
- Safe to breathe
- Non-corrosive to equipment
What are the four types of odor control technologies?
- Municipal Wastewater Plants
- Industrial Wastewater Plants
- Sludge Drying Beds o Landfills
- Paper and Pulp Mills
- Steel Mills
- Metal Casting Plants
- Refineries
- Chemical Manufactures
- Asphalt Plants
- Food Processors
How to cure sewer gas odors from septic systems?
Here are some things you should do to avoid getting a septic tank odor:
- Do not flush down an inorganic product down the toilet such as used sanitary pads, trash, cigarette butt, etc.
- Do not wash cleaning products, coffee grounds, fat oils, paint, and other chemicals down drains.
- Always add a cup of soda to drains once a week to maintain the pH level of the septic tank.
How to reduce septic tank odor?
Tips for Eliminating Septic Odors
- The Causes of Septic System Odors. There are many ways to eliminate these odors, and they mostly require regular septic maintenance.
- First and Foremost: Stay Away from Septic Additives. ...
- Get Your Septic System the Service it Needs. ...
- Other Tips and Tricks. ...
- Schedule Your Service Today. ...
What is Prosweet odor control?
ProSweet odor control technology includes a variety of different products to address water-related odor problems arising from the release of hydrogen sulfide, mercaptans, ammonia, amines, volatile organic compounds, and general nuisance odors. The most cost-effective solution is identified through an in-depth system analysis and engineering approach.
What chemical substances stimulate the sense of smell?
In many industrial processes and wastewater treatment systems, hydrogen sulfide, mercaptans, amines, and volatile organics are some of the emitted odorous substances that can stimulate your olfactory sense.
How to protect equipment integrity?
Protect equipment integrity - By removing odors that are corrosive in nature, equipment is protected from added corrosion and corrosion-related issues. Eliminate public complaints - Public complaints about odor can negatively affect an industry's image in a community.
What are the two types of technologies used to control odors in wastewater?
These technologies can be split into two main groups: vapor-phase technologies, used to control odorous compounds in the air or gas; and liquid-phase technologies, used to control odorous compounds in ...
What causes odors in wastewater?
Any place or process in which wastewater is collected, conveyed or treated has the potential to generate and release nuisance odors to the surrounding area. However, most odor problems occur in the collection system, in primary treatment facilities and in solids handling facilities. In most instances, the odors associated with collection systems and primary treatment facilities are generated as a result of an anaerobic or "septic" condition. This condition occurs when oxygen transfer to the wastewater is limited such as in a force main. In the anaerobic state, the microbes present in the wastewater have no dissolved oxygen available for respiration.
What is wet air scrubbing?
Wet air scrubbing is the most flexible and reliable technology for vapor-phase wastewater odor control. This technology can be used to treat virtually any water-soluble contaminant. In addition to hydrogen sulfide and "organic" odors, wet scrubbing is very effective for ammonia removal. In a wet air scrubber the odor contaminants are solubilized from the vapor phase into an aqueous chemical solution. The removal mechanism is purely chemical and is not subject to upsets as are biological processes. The chemical balance in the system is automatically and continuously maintained, even under changing loading conditions, minimizing the chance for odor break-through. The application of a multi-stage scrubber allows the utilization of a different chemical solution in each of the stages to efficiently use chemicals and target a wide range of contaminants for treatment.
What is the most common contaminant in wastewater?
As mentioned above, in raw wastewater applications the most prevalent contaminant is hydrogen sulfide, but other organic odorous compounds typically are present as well. Hydrogen sulfide can be solubilized with a solution of sodium hydroxide.
How does bioxide work?
The process uses naturally occurring bacteria to biochemically oxidize dissolved sulfide in the presence of nitrate. This mechanism takes place when the solution is applied in wastewater that contains dissolved sulfide. The sulfide typically is either generated upstream of the injection point where no nitrate exists in the wastewater or is contributed downstream via a septic lateral flow. Nitrate is injected in sufficient quantities to biochemically oxidize the sulfide via the following reaction.
What is liquid phase in wastewater?
Liquid-phase technologies typically are used in collection systems where control of both odors and corrosion are concerns and/or where multiple point odor control is an objective.
How does carbon adsorption work?
In a carbon adsorption system, the air stream is passed over a bed of adsorbent (carbon) and the odor-causing compounds are attracted to and adhere to the surface of the adsorbent. This is the simplest of the three wastewater technologies to control odor. There is no on-going chemical supply to the system, and there are no biological processes to be upset. Adsorption is applicable to a wide range of compounds. Hydrogen sulfide and related sulfur-based compounds are removed effectively by carbon adsorption systems, but ammonia and other nitrogen-based compounds are not effectively treated. Various carbon type systems including activated and impregnated can be used independently or in combinations to remove many different contaminants.
What is the process of reducing the oxygen demand in wastewater?
During the early stages of treatment, the wastewater systems focus on settling or skimming large sediments and reducing biochemical oxygen demand (BOD) from within the wastewater. During BOD reduction, microbes or “bugs”, called sulfate-reducing-bacteria thrive on the sulfate ion, SO4, as their source of oxygen for respiration. This process gives off hydrogen sulfide (H2S) which most people recognize as the rotten-egg odor coming from treatment plants.
How do wet scrubbers work?
Once the hazardous fumes are safely transported from their source, the wet scrubber systems convert the vaporous pollutants into a liquid/condensate solution. This is accomplished by spraying special chemical and water mists into the scrubber chambers, which solubilize targeted pollutants based on their chemical compounds.
What is the second stage of a wet air scrubber?
The second stage of the scrubber will recycle the effluent back through another scrubber chamber where sodium hypochlorite is added to remove the sodium hydroxide. Through this process, wet-air-scrubbing can remove one of the most common foul-air contributors from wastewater treatment systems; flammable, toxic, ...
What is the largest producer of wastewater fumes?
Primary and secondary treatment systems along with biosolids-processing-facilities are the largest producers of these fumes.
Where are wet scrubbers located?
For the purposes of vapor phase wastewater odor control, wet scrubber systems are typically located at the wet wells, headworks, grit chambers and biosolids treatment areas. These systems start by drawing large amounts of process-air from the fume source to the scrubber unit.
Do wastewater treatment plants use foul air?
Increasingly, wastewater treatment plants are devoting more resources to foul air treatment and installing advanced wastewater odor control systems to combat the issue. Wet air scrubbing is but one technology, and one aspect, of the never-ending process by which wastewater treatment plants work to purify both air and water before discharging the effluent back into our lakes, streams, and oceans to be safely used again.
What is the problem with odor control in wastewater treatment plants?
Hydrogen sulfide odor is a serious issue in wastewater treatment plants. Vapor or fan systems installed at the bar screens and digesters solve the problem. In some cases Ecosorb odor control products can be diluted with plant water for more cost-effective operations.
Does raw septage cause odor?
Raw septage from haulers can present odor problems to plants that otherwise have their industrial emissions under control. Fan or nozzle atomization systems posted near the unloading point and vented or open downstream locations provide effective odor removal.
Is Ecosorb wastewater treatment safe?
Controlling odors becomes two-fold: smells generated from processed food and from wastewater lagoons. Ecosorb wastewater odor control products are approved for use outside of food processing plants and are safe for the environment.
Types Of Wastewater Lift Stations
There are two common types of lift stations for collecting and treating wastewater: a dry well lift station and a wet well lift station.
Types Of Lift Station Odor Control Systems
When dealing with wastewater lift stations, there is a concern for corrosion and sewage odors that need to be addressed. Options for lift station odor control are classified as either passive or chemical.
