Oxygen Gas Applications

1/20/2021 6:54:43 PM

1) Wastewater / Sewage Treatment

In worldwide, a steady rise in the demand of freshwater and the ongoing depletion of usable natural resources, due to rapid urbanisation and economic development, are placing growing pressure on existing reserves. Water is a precious and increasingly scarce commodity. To tackle the scarcity challenge, the world needs more sustainable, effective water and wastewater management practices and technologies.

Wastewater biological treatment process uses microorganisms to collect the suspended solids, to dissolve organic ones, and to stabilize the organic matter. In addition, wastewater biological treatment removes or stabilizes nutrients such as Nitrogen and Phosphorus, which can stimulate the growth of aquatic plants. The survival and relative growth of the various species of microorganisms depend on environmental conditions existing in the liquor. The most important ones are the quantity of food and nutrient, pH, temperature, and oxygen availability in the liquor.

Dissolved oxygen plays a very important role in water treatment. Some of the compounds in the sewage are biodegraded under the action of aerobic bacteria, and the dissolved oxygen in the water is consumed. The dissolved oxygen should be kept at a certain concentration, and in the aerobic process of the buried domestic sewage treatment equipment, the dissolved oxygen in the water is constantly supplemented due to the dissolved oxygen in the air and the photosynthesis of the green aquatic plants. But when the water body is polluted by the organic matters, the oxygen consumption is seriously increased, and if the dissolved oxygen is not added in time, the anaerobic bacteria in the water body will rapidly propagate, and the organic matters cause the water body to be blackened, however the concentration of dissolved oxygen shall be controlled, because if too high, the transfer rate of the oxygen is reduced, the power cost of the buried domestic sewage treatment equipment is increased, the peroxidation of the activated sludge is caused, the sludge is not flocculated, and the sedimentation effect of the flocculation body is affected.

In the natural condition, the oxygen content in the air is not much, and water temperature is the main factor, the lower the water temperature, the higher the content of dissolved oxygen in the water. The molecular oxygen dissolved in water is called dissolved oxygen, usually, as do, expressed in the number of milligrams of oxygen per liter of water. The amount of dissolved oxygen in water is an index to measure the self-purification capacity of the water body. The dissolved oxygen value is a basis for studying the self-cleaning ability of water. The average dissolution concentration should be kept at 2 mg/l, and the activated sludge can be kept in good condition and in the best state.

By injecting oxygen into your sludge plants, you can improve sludge settling, lower sludge load, and improve purification capacity. These improvements result in lower wastewater levies and odorless purification, eliminating the danger, expense, and logistical problems of liquid oxygen deliveries. Mentis onsite PSA oxygen generator ensures qualified oxygen supply to assist the whole process of the water treatment system.


2) Ozone Production

Oxygen for, Ozone production

Ozone has been currently studied for various applications, such as water treatment, domestic and industrial effluent treatment, medicine, dentistry, veterinary medicine, agriculture, disinfection of environments, and food preservation. As the use of ozone is growing fast, improvements in its generation by ozone generator systems is fundamental. Ozone is known as the second most powerful oxidizing agent that can be used on a large scale for water treatment and is being used by several countries in thousands of treatment systems. Ozone can be produced in three ways: by electrolysis, UV (ultraviolet), and corona effect. In commercial generators, ozone is mainly produced by UV radiation and the corona effect. UV radiation, however, does not meet the large-scale production required by various industries. This way, corona electrical discharge is the most commonly used method to obtain a significant amount of ozone. In the corona discharge process, ozone is generated by an electrical discharge in a stainless steel tube called an ozone reactor.

The corona discharge method uses high-speed electricity to bombard oxygen to decompose it into oxygen atoms, and then the oxygen atoms from ozone through a three-body collision reaction. Therefore, how to provide an oxygen source for ozone production is one of the key processes in the ozone treatment wastewater process.

There are four oxygen supply options: liquid tank supply, small oxygen generator supply, oxygen backup bars, and pipeline supply. While Onsite PSA Oxygen Generator is the main source with features of convenient, easy to install, low investment as well as a quick return on investment.


3) Medical Sectör

Oxygen is essential to support life in medical services. Medical oxygen is not only a MUST but also the most important facility in all kinds of medical services - hospital, clinic, mobile hospital/clinic, combat hospital, home care... There are national, regional & international medical standards on medical oxygen purity, and typically the requirement on medical oxygen is 93% which is dangerous for direct respiration and will be diluted & humidified to terminals for breathing by patients. There is also a complete set of directives & calculations for the required oxygen flow according to the size and scale of the hospital.

As it requires 7*24 uninterrupted oxygen supply, dual or multiple oxygen production lines are required to have at least one line standby. For safety purposes, a cylinder oxygen backup system in parallel with the oxygen production lines is required too.

Mentis hospital oxygen network system, on-site oxygen generators, is specially designed for hospital & medical services oxygen supply. The system will end your expensive reliance on traditional bulk liquid oxygen supply or cylinder oxygen supply without compromise on safety and reliability. It consists of an air compressor, air dryer, air filters, PSA oxygen generator, oxygen monitoring system and oxygen back up system. Reliable and safe Mentis oxygen system is designed and fabricated stringently in accordance with relative industry standards ISO 10083: 1982. The product oxygen meets the requirements of the United States Pharmacopoeia (USP) for medical breath oxygen at the purity of 93±3% and meets the specific needs of hospitals as well. Continuous oxygen monitoring system ensures that the medical oxygen purity and flow accord with standards and settings. Fully automatic control, turnkey, low maintenance, most importantly Mentis professional experienced engineering & service teams serve you 7 days 24 hours, which will remove all your worries about installation, startup, operation, maintenance, and troubleshooting.


4) Mining, Mineral Processing, Gold Processing

The extraction rate and production rate of final products are the main performance indexes in the mining industry, especially for gold mining. Traditionally compressed air is applied to increase the extraction rate of the mineral products, in this way the effectiveness of oxidation is quite limited since there is only 21% of oxygen in the air. While such mines are all in remote areas with limited transportation conditions for bulk materials, the onsite oxygen supply by PSA technology is adopted by more and more miners and mining companies due to its effectiveness & reliable performance.


5) Metallurgy Industry

Oxygen is colorless and tasteless, with a volume percentage of 21% in the air. It is an oxidant, a combustion aid, and a basic element of life support. Oxygen reacts with all elements other than inert gases to form oxides and mixtures. Oxygen itself does not have combustion performance, but oxygen can effectively support combustion, which is a precious treasure given by nature.

It is a valuable technical measure to increase productivity, reduce energy consumption, control the environmental pollution, improve the technology of metallurgy and increase the economic benefit by replacing the ordinary air with the oxygen-rich air in nonferrous metallurgy. The M-PSA technology of Mentis provides the metallurgy of non-ferrous metals such as copper, lead, nickel, zinc, tin, and gold with a stable and reliable oxygen source to optimize the energy-saving of oxygen-rich combustion technique, largely reducing the oxygen cost and obtaining significant comprehensive benefit.

The non-ferrous metallurgy of copper, lead, nickel, zinc, tin, and gold, etc. mainly adopts the oxygen-rich air whose concentration is between 24% and 90% and the productivity of the oxygen generating device is generally under 3,000Nm3/h. This is the best parameter range of M-PSA oxygen generators

Benefits of oxygen supply by on-site oxygen generator for non-ferrous metallurgy of copper, lead, nickel, zinc, tin, and gold, etc. include power decrease of more than 40%, energy saving of more than 30%, reducing environmental pollution and so on.

Mentis M-PSA oxygen generators adopt advanced vacuum pressure swing adsorption (M-PSA) technology to produce high-quality oxygen from air directly in about 25~30 minutes after startup with fully automatic control. Also because of its easy installation, convenient operation, simple and low maintenance, low cost,  Mentis M-PSA oxygen generators are the better choice for the metallurgy industry.


6) Cutting & Welding

Oxy-fuel combustion is the process of burning fuel using pure oxygen instead of air as the primary oxidant. If the nitrogen component of air is not heated, the consumption of fuel would be reduced, which makes higher flame temperature possible.

Historically, the primary use of oxy-fuel combustion has been in welding and cutting of metals, especially steel, as oxy-fuel affords a higher flame temperature than normal air-fuel.

Oxy-Fuel Welding (commonly called oxyacetylene welding, oxy welding, or gas welding worldwide) and Oxy-Fuel Cutting are a process of using fuel gas (or liquid fuels, e.g. gasoline) and oxygen to weld or cut metals.

In oxy-fuel welding, a welding torch is used to weld metals. When two parts of the metal are heated to the same temperature, there will be a shared pool of molten metal, then the metals could be welded together well. The molten pool generally with additional metal is together called a filler. The filler material to be used depends upon the metals to be welded.

In oxy-fuel cutting, a torch is used to heat the metal to its kindling temperature. A stream of oxygen is then trained on the metal, burning it into a metal oxide that flows out of the kerf as slag.

The advantages of Oxyacetylene Welding/Cutting

Oxyacetylene Welding Is Easy to Start

Most welders need a tool on hand for cutting metal, and an oxyacetylene torch is an affordable way to kill two birds with one stone. By setting up a cutting torch for welding, you can add a filler rod or just rely on the heat of the process to join the metal. Most importantly, a torch welding setup can help you accomplish all sorts of projects: welding, heating, brazing, and bending. You can work with carbon steel, Chromoly, aluminum, stainless steel, and even cast iron.

Portability and Heat for Welding

The oxyacetylene welding process can come in especially handy when you need to crank up the heat. While Multi-process welders and stick welding machines are coming in lighter packed with more power, thus oxyacetylene welding has historically been the first choice of welders. The simple setup allows welding anywhere.

Welding Cars and Machines with Oil Leaks

The regular users of oxyacetylene welding have praised its effectiveness for welding cars and trucks where there are oil-soaked castings in crankcases and transmission housings. While arc welding will draw more heat to the surface and contaminate the weld, oxyacetylene will be more effective at joining the metal without applying excessive heat into the weld. This will minimize the amount of oil in the weld itself.

Of course, many automotive welding jobs will require heating and bending of metal, so a torch setup can serve the dual purposes of heating and welding all in the same project.

With MENT??S onsite PSA Oxygen generator, your real-time oxygen supply at the user spot for cutting or welding will be guaranteed anytime and anywhere.


7) Burning Process

Combustion is the combination of fuel, an oxidizer, and an input energy source such as heat as shown by the combustion triangle. In the case of many reactions such as hydrocarbon fuels, this oxidizer would be oxygen (in most cases in the form of air), which requires low input energy to create a chemical reaction.

During glass making, ampoule making, and at steel mills, thermal power plants, increasing the efficiency of combustion is very important to save fuel and create more energy. This principle is also applicable to other combustion-related industries.

In the atmosphere, the oxygen content is 21% in concentration and by manually increasing the oxygen concentration fed for the combustion process we can get significant results: more heat and higher combustion ratio for fuels which make less waste of imperfect combustion or pollution.

Mentis offers custom solutions to easily increase the efficiency of the burning process. Our products are highly productive, safe, and energy-saving.  It will save more money for those who use cylinder oxygen or liquid oxygen before, as well as making their production easier.


8) Aquaculture

Dissolved oxygen content in the water of fish ponds is one of the most important parameters of water quality, as the oxygen is a vital condition for all the organisms living in water and having an aerobic type of respiration.

Intensive fish culture systems are generally established in areas where there are a large quantity and good quality of flow-through water. In these systems, the oxygen requirement for fish and aquatic products is ensured by the inflow of water. This means the fish or aquatic products load capacity depends on the rate of water flow. The water flow can not be increased beyond a certain limit because of technical, economic, and physiological reasons.

By application of pure oxygen, the oxygen supply no longer limits the fish and aquatic products load of the system. Furthermore, the oxygen supply can be regulated and increases the safety of the operation. The significant advantage of the application of pure oxygen is the high mass transfer rate between pure oxygen and water.

In order to minimize oxygen consumption, oxygen dissolving devices are needed to ensure the most perfect absorption of oxygen by water. One way is bubbling oxygenation where the oxygen gas comes in contact with water by breaking into bubbles. The rate of oxygen dilution mainly depends on the depth of the water layer, the travel distance of bubbles in the water body, and the rate of oxygen feeding. Higher efficiency can be achieved by decreasing the bubble size, thus the contact time and the contact surface are increased.

Mentis energy-saving oxygen generation system along with professional solutions for fish farming is the best choice to get oxygen easily at your site, to continuously boost your aquaculture business in the long run.

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