The process of aggregating colloidal particles and tiny suspended solids in water through some method (such as adding chemicals). Coagulation includes two processes: coagulation and flocculation. Coagulation mainly refers to the process in which colloids destabilize and form tiny aggregates, and flocculation mainly refers to the process in which destabilized colloids or tiny suspended solids …
(1) Expanded sludge The performance of activated sludge settling and flocculation can be understood by measuring the sludge volume index (SVI). Generally, the sludge volume index (SVI) is above 200mL/g, and the concentration of the sludge layer in the graduated cylinder changes from 5g/L to pressure. The dense phase sludge is called bulking sludge, one …
Biological contact oxidation method The biological contact oxidation method is used to treat wastewater, that is, the biological contact oxidation process is used to fill the biological reaction tank with fillers. The oxygenated sewage immerses all the fillers and flows through the fillers at a certain flow rate. The filler is covered with biofilm, and …
Activated sludge is a floc with strong adsorption and decomposition capabilities. The core of activated sludge lies in the word "living". As we all know, natural rivers have self-purification functions. This is because a group of microorganisms live in the water. The microorganisms eat the pollutants, so the water body will return to cleanliness. Therefore, …
Flocculant: Polyaluminum chloride (used for flocculation, can reduce SS, COD, total phosphorus) Polyacrylamide (anions are generally used for flocculation and accelerated precipitation, and cations are generally used for sludge dehydration) Phosphorus remover: iron salt, aluminum salt, calcium salt.
Urban domestic sewage treatment chemicals Flocculant: Polyaluminum chloride (used for flocculation, can reduce SS, COD, total phosphorus) Polyacrylamide (anions are generally used for flocculation and accelerated precipitation, and cations are generally used for sludge dehydration) Phosphorus remover: iron salt, aluminum salt, calcium salt.
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 …