Can sodium hydroxylate kill bacteria?

Don’t conclude too hastily to use NaOH. . . It is recommended that you first have the professional analysts at the environmental monitoring station test the concentration of hydroquinone in the wastewater. This substance is quite peculiar – it has different effects on various bacteria. . For example, with methanogenic bacteria, at low concentrations of hydroquinone (such as 0.3 g/L), it does not kill the bacteria; instead, it has an activating effect. At higher concentrations, this positive activating effect disappears. However, the sludge can be regenerated; yet at even higher concentrations (such as 2 g/L), the bacteria are completely killed. . First, test your sludge by conducting a bacterial culture test on-site using hydroquinone. Don’t draw conclusions hastily; bacteria are living organisms, they are forms of life, and they need to be taken seriously. .

Trace amounts of phenol – how much is that? Here is some information for your reference: Phenol-containing wastewater with a low concentration and no value for recovery, or wastewater containing dozens to hundreds of milligrams of phenol per liter even after recovery treatment, needs to be purified before it can be discharged or reused. Common purification methods include: ① Activated sludge process: It provides good treatment results at a relatively low cost. With the progress in biological research on activated sludge and the improvement of activated sludge cultivation techniques, particularly the domestication and application of highly efficient phenol-degrading strains, as well as the emergence of new high-performance devices, this method has become the primary approach for treating various phenol-containing wastewater. The phenol removal efficiency can reach 95–99%. ②Biological filter method: It has strong adaptability to fluctuations in load and is simple to operate and manage. In recent years, filters using plastic media, tower-type biological filters, and biological rotors have been developed, overcoming the disadvantages of conventional filters such as large floor space and low treatment efficiency. These systems have been applied to the treatment of phenol-containing wastewater in coking plants, gas plants, and chemical fiber factories. ③Oxidation pond method: Utilizes natural biological processes for purification. It is widely used in the United States to treat phenol-containing wastewater from refineries, coking plants, and similar facilities. This method has low treatment costs, but it requires a large amount of space; it can be considered if the land conditions permit.