Pure oxygen aeration wastewater treatment: a petrochemical company's water supply and drainage plant was built in May 1987. In 1992, high MLSS concentration method was improved to give full play to the advantage of high DO concentration and enhance the depth of sewage treatment. This factory has a set of special oxygen generator for sewage treatment, which was put into operation in December 1986, with oxygen 840m3/h (98%) and nitrogen 1000m3/h (99%). In August 1190, another set of 6000m3/h air separation equipment was put into operation. BOC, a British company, installed two sewage treatment plants at The Phoenix Pulp and Paper Company in Thailand in 1992 to inject three tonnes of pure oxygen a day into the wastewater to restart production at the government-ordered closure of the plant.

Liquid oxygen

Oxygenated wastewater Treatment: On-site oxygenated wastewater treatment, but Cedar Rapids, Iowa, is the first city in the country to use one. Swedish SVENSKA fiber in Austria LaJiEr symplectic group, a subsidiary of SCA rafiq co., LTD is a large paper mill, with an annual output of 320000 tons of drawing paper, the wastewater quantity every day (according to the chemical oxygen demand (cod) the CSB) equivalent of a city of about 160000 people the amount of sewage discharge, sewage treatment facilities often operate at full capacity under the limit state.

PSB (partial oxygen fumigation) process, in which pure oxygen is added to the air and then sent to the biochemical tank of the purification equipment. Using this process requires a detector to determine the concentration of oxygen, so that the required amount of oxygen can be delivered according to the different degrees of wastewater pollution. The oxygen delivery system is a mat made of slit hoses that releases oxygen in tiny bubbles to help it dissolve in water. The hose is pre-installed on a steel frame, which makes it very easy to install at the bottom of the pool. Today, sewage is cleaned to the benefit of the environment.

Liquid oxygen in a test tube

Dead lakes are regenerated by cyclic oxygen injection: dead lakes of nonliving organisms and fish are regenerated by forced oxygen injection.