Surfactant-enhanced ultrasonic extraction of polymer substances from remaining sludge cocamidopropyl betaine

Wastewater resource utilization is the future growth instructions of sewage therapy and is likewise an unpreventable requirement for sustainable human development. Raw material removed from sewage or sludge, such as minerals and phospholipids, can be used as printing and dyeing raw materials, primary adsorbents, and biological flocculants. It is used in water therapy, agriculture, horticulture, the paper sector, healthcare, the building and construction sector, and various other areas and has wonderful relevance. Recycling value.


There are several kinds of bacteria in the staying sludge. Therefore, the compounds extracted from it needs to be a combination of different polymer substances. Whether they are intracellular or extracellular polymer materials, they all have regular energetic groups, such as carboxyl, hydroxyl, and phosphate. Groups and other useful teams. The existence of these groups enables the drawn out polymer compounds to be made use of as hefty metal ion adsorbents.

As a tidy treatment modern technology, ultrasonic waves do not require the addition of chemicals throughout the action and will certainly not create additional contamination. Ultrasonic waves can distribute flocs in the water stage, and the cavitation impact can damage big bits into small particles. Ultrasound is an energy-intensive therapy method, and its biggest drawback is its high energy consumption, which restricts the possibility of sensible applications. Surfactant has a solubilizing result, which can wash off proteins on the cell membrane, raise the permeability of the cell membrane by affecting the osmotic pressure, and heighten the damages to the sludge floc. Additionally, surfactant activity can promote the removal of EPS from continuing to be sludge, change the cell framework, and affect sludge properties.

Surfactant-enhanced ultrasonic approaches can be utilized to extract natural polymer materials and as a pretreatment method to decrease energy usage. The boost in the extraction amount of PSs from the staying sludge under the action of surfactant-enhanced ultrasound is because of the launch of raw material due to floc disintegration and cell dissolution.


First, surfactants, such as anionic (such as salt dodecyl sulfate, SDS) and cationic (such as cetyltrimethylammonium bromide, CTAB), are utilized to improve the relationship between sludge and polymer compounds. Interactions in between. They can lower the surface stress of sludge, making it much easier for polymer substances to divide from sludge.

Subsequently, ultrasound is presented to improve the removal effect better. The solid vibration and shock waves created by ultrasonic waves can destroy the structure of sludge and tear cell walls, thereby releasing even more polymer materials. Additionally, ultrasound can also advertise the interaction in between surfactants and polymer materials, making the extraction process much more efficient.

During the extraction process, it is additionally required to enhance the speculative specifications, such as the regularity, power, and action time of ultrasonic waves, to accomplish the very best removal result.


As a whole, surfactant-enhanced ultrasonic extraction of polymer compounds in residual sludge is an efficient and ingenious method. It not only boosts extraction performance however additionally aids expand the extent of source usage of staying sludge, providing new possibilities for the development of sewer treatment and source recovery fields. However, the functional application of this technique requires more study and optimization to resolve possible technological troubles and financial concerns.


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