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Application direction of difficult industrial wastewater treatment technology

High content of COD sewage (COD 10000mg/L or more)
       High-salt sewage (salt content ≥1%)
       Poor biodegradability of sewage (B/C≤0.2)
       The industrial wastewater treatment main body materialization treatment process and biochemical treatment process are two major parts; due to the complex composition of industrial wastewater water quality, the molecular structure is stable, the traditional water treatment method is difficult to achieve the expected results, the main body has two forms:
       (1) Some industrial sewages have poor biodegradability. If the previous physical and chemical treatment cannot effectively decompose the toxic and harmful substances in the sewage, directly entering such biochemical treatment system will inhibit the microbial bacteria and even cause death, so that the biochemical efficiency The reduction did not achieve the desired results, which led to the failure of the entire sewage treatment project.
       (2) Another part of industrial sewage is not biochemical. This part of industrial sewage contains high salinity, high acidity and alkalinity, and has toxicity characteristics. The organic matter content and salt content in the water body are far beyond the microbial bacteria. Tolerance range, such wastewater can not be completely treated by biochemical process, and must be solved by all physical and chemical processes.
Catalytic oxidation process
       Conventional oxidation processes are mostly carried out by pure oxidant oxidation or Fenton catalytic oxidation. The pure oxidant oxidation method relies on directly adding a large amount of oxidant such as hydrogen peroxide to the water body, and relies on the contact process of the oxidant with the organic matter in the water to oxidize and decompose the organic matter in the water body. The pure oxidant method leads to the excessive concentration of oxidant in water due to the lack of catalyst. The presence of oxidant such as hydrogen peroxide has a very adverse effect on the subsequent biochemical anaerobic and aerobic processes, and the operating cost is greatly increased due to the large amount of oxidant. Raise. Fenton catalytic oxidation method adds FeSO4 to the pure oxidant method, and uses Fe2+ catalysis to convert H2O2 into strong oxidizing OH radical, and deeply oxidizes the refractory organic matter in water. However, the above two methods are difficult to decompose organic substances in many wastewaters, and it is difficult to continue to use them in practical engineering applications.
       Our company uses a variety of rare metals to be used as a special catalyst for sewage treatment. It uses the principle of catalytic oxidation of rare metals with various oxidants to reduce the activation state energy of organic pollutants in water under the condition of external physical factors and reduce redox. The condition is such that the oxidant decomposes most of the organic matter under normal temperature and pressure. The catalytic oxidation process is not affected by the oxidant type, the water body temperature, the pH value, etc., when the organic pollutant component in the water changes, the oxidant species are oxidized in a targeted manner, and the active component of the catalyst is attached to the solid carrier, which can be continuously Long-term stable use for several years.
       Under the action of the catalyst, the strong oxidants O, O3, Cl-, HClO, H2O2, etc., directly react with the organic matter in the wastewater, and reduce it to carbon dioxide, water, nitrogen and simple organic matter.
       The catalytic oxidation process is carried out at room temperature, and the redox reaction is realized by the ion migration process. The reaction has no neutralization loss, the reaction speed is fast, completely, and is not affected by the ion concentration change in the water, and does not cause secondary pollution, and meets the processing requirements. It adopts catalytic cracking fluidized bed continuous oxidation and reduction device, which has small volume and large treatment flow, simple operation, capacity expansion, flexible expansion and convenience, and saves a large amount of civil construction investment. At the same time, the amount of sludge produced by the treatment system is small.
Biological domestication
       In the biochemical system, due to the existence of a large number of biological flora, the biological bacteria are easily mutated due to the influence of climate, temperature and water quality of the wastewater. The bacteria in the biological pool are difficult to survive for a long time, and must be softened continuously and the activity is lowered. To maintain the activity of the biological system flora, we have developed bioaccumulator equipment.
       The principle of the bioaccumulator is that the inoculum is put into the acclimator in the early stage, and the appropriate temperature and nutrients are given to allow the strain to rapidly multiply in the acclimator; then the mature active species are put into the pool and replenished into the acclimator. Appropriate nourishment, so that the remaining strains in the domestication plant continue to multiply, forming a recurring and enduring proliferation and domestication system, providing sufficient high-activity bacteria source for biochemical pool supplementation, and ensuring the high activity of the input strains. The biochemical pool operating efficiency is kept at a high level.
       ◆ The strains are professionally compounded and domesticated according to the water quality requirements.
       ◆ Enzymes produced during the breeding of microbial flora decompose and emulsifie organic waste into biodegradable organic waste.
       ◆ The liquid biological bacteria produced every day has a biological bacteria content of more than 200 billion per liter.