Pretreatment Definition & Meaning - Merriam-Webster
: an act or instance of treating someone or something in advance : preliminary or preparatory treatment. pretreatment of stains. pretreatment of a surface for painting. … pretreatment is often required to remove oil and grease from the waste water. John H. Sheridan.
Pretreatment - an overview | ScienceDirect Topics
Pretreatment is the initial step in the process to obtain polysaccharides and oligomers from macroalgae. Physical, biological, and chemical pretreatments have been used to expose the cell wall components (Cervantes-Cisneros et al., 2017; del Río et al., 2019). Physical pretreatment involves the reduced particle size and milling of raw material.
Cellulose nanocrystals: Pretreatments, preparation strategies ...
2021年7月1日 · Cellulose nanocrystals (CNCs) have attracted great interest from researchers from academic and industrial areas because of their interesting structural features and unique physicochemical properties, such as magnificent mechanical strength, high surface area, and many hydroxyl groups for chemical modification, low density, and biodegradability.
National Pretreatment Program | US EPA - U.S. Environmental ...
2024年4月8日 · The national pretreatment program is designed to: protect POTW infrastructure, and. reduce conventional and toxic pollutant levels discharged by industries and other nondomestic wastewater sources into municipal sewer systems and into the environment.
Pretreatment - an overview | ScienceDirect Topics
Pre-treatment is a key part of any decommissioning programme and involves a variety of processes applied to liquid and solid radioactive waste. It is defined as any or all of the operations preceding waste treatment. Pre-treatment comprises such operations as collection, segregation, adjustment and decontamination.
PRETREATMENT definition and meaning | Collins English Dictionary
A pretreatment is something which is applied to a feed in order to make a process or stage more effective. A typical pretreatment prior to metal stripping usually includes a soak in a hot …
Key parameters of non-ablative fractional laser pretreatments ...
Background: The uptake of topical formulations can be enhanced through laser pretreatments. Newer technologies, such as non-ablative fractional lasers (NAFLs), can target dermal tissues and spare the stratum corneum (SC), which can mitigate common side effects associated with ablative laser treatment. Objective: To discuss the parameters of 2 ...