COD: This is a technical parameter used in the chemical industry, also known as chemical oxygen consumption (COD). This value represents the amount of oxygen required by the oxidant to oxidize organic pollutants in water, expressed as the amount of oxygen consumed per unit volume of wastewater (mg/ L) (O2). COD reflects the degree of pollution by reducing substances in water. Reductive substances in water include organic matter, nitrite, ferrite, sulfide and so on. Chemical oxygen demand - COD is also used as one of the indicators of the relative content of organic matter. When potassium dichromate is used as an oxidant under acidic conditions, COD is almost the dissolved oxygen content consumed by the complete oxidation of organic pollutants in wastewater, which is represented by CODCr. At the same time, BOD, or biochemical oxygen demand, is a comprehensive indicator of the number of pollutants in water that require oxygen, such as organic matter.
Indicates the total amount of dissolved oxygen in water consumed when organic matter in water is oxidized and decomposed due to the biochemical action of microorganisms to make it inorganic or gasified. The units PPM are expressed in milligrams per liter. The higher the value, the more organic pollutants in the water, the more serious the pollution.
COD and BOD have commonly used test indexes in the water treatment industry. These are conventional detection methods in water treatment. The small peristaltic pump
can be used for water quality sampling, regular extraction of chemical samples, regular detection, regular sampling, and transmission of the detection value to the environmental protection testing department.
To prevent inaccurate test data caused by some chemical reactions, the small peristaltic pump
can be used for sampling, and chemicals need to be added during testing. These drugs also need to be sampled by a peristaltic pump
to avoid corrosion.The peristaltic pump is used with a special corrosion-resistant hose for dosing, and the flow is usually below tens of mL/min. Generally, 2-3 channels or 2-3 pump heads work at the same time.