Characteristics of urban domestic sewage 1. Water quality changes greatly: Due to the different scale and nature of urban industries and the different proportions of domestic sewage, the quality of urban sewage varies greatly. The quality of urban sewage water not only varies greatly due to different industrial structures, but also the quality of sewage …
Mine wastewater treatment chemicals 1. Oxidizing agents: Oxidizing agents can promote the oxidation and decomposition of organic matter and suspended solids in wastewater into harmless substances such as carbon dioxide and water. Potassium permanganate peroxide is usually used as an oxidizing agent for treatment. 2. Precipitant: Coal mine wastewater often contains a large amount of …
1.Metal replacement method Metals in wastewater can be recovered using the metal replacement method. In principle, any metal that is more active than the metal to be removed can be used as a displacing agent; in fact, a series of issues such as the source, price, secondary pollution, and subsequent treatment of the displacing agent …
Coking wastewater: 1. Source: Coking wastewater is industrial wastewater containing volatile phenols, polycyclic aromatic hydrocarbons, oxygen, sulfur, nitrogen and other heterocyclic compounds produced during high-temperature carbonization, purification and by-product recovery of coking and coal gas. It is a kind of high CODcr, high phenolic value, high An industrial organic wastewater that contains ammonia nitrogen and …
Printing and dyeing wastewater treatment agents - conventional chemical treatment agents Polyacrylamide (PAM) and Poly Aluminum Chloride (PAC) are flocculants and coagulants commonly used in sewage treatment. Both of them are generally used together to achieve the effect of coagulation, flocculation and sedimentation. It is mostly used to deal with floating matter, impurities, pigments and …
Polyacrylamide agents should be widely used and have good flocculation effect. However, high-quality products will also be affected by other factors during application, resulting in poor results. When using polyacrylamide for coal washing wastewater treatment, the following issues need to be paid attention to. When polyacrylamide is used in coal washing wastewater, attention should be …
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Chemical wastewater refers to the wastewater produced in the process of producing products in chemical plants, such as the oily wastewater produced in the production of ethylene, polyethylene, rubber, polyester, methanol, ethylene glycol, oil tank farms, air separation and air compressor stations, etc. After biochemical treatment, it can generally meet the national secondary discharge standard. …
Polyacrylamide agents are widely used and have a good flocculation effect, but high-quality products will also be affected by other factors in the application, resulting in poor results. In the treatment of coal-washing wastewater, the following issues need to be paid attention to when using polyacrylamide: 1. Pay attention to coal quality In mine production, …
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Polyaluminum chloride is a new type of inorganic polymer coagulant. It is the most widely used variety with mature industrial production technology. It has become the mainstream product in the polyaluminum flocculant market. The earliest production and application was Japan. In the late 1960s, it was officially put into industrial production and application. Our country …
The drilling wastewater is mainly treated by chemical coagulation. The agents used are sodium hydroxide, polyaluminum salts, polyiron compounds and polyacrylamide.