Fouling control of PAC/UF process for treating algal-rich water

Liu, Yongwang; Li, Xing; Yang, Yanling; Liang, Shuang

doi:10.1016/j.desal.2014.10.020

Cited by 26 publications

(2 citation statements)

References 36 publications

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“…PAC particles have more adhesion sites, leading to greater biodegradation potential. Also, PAC has better adsorption of certain proteins and significantly reduces the amount of protein foulants in solution [27] . When PAC enters the membrane system, the deposition of PAC particles weakens the algal cell layer on the membrane surface.…”

Section: Adsorption Pre-treatmentmentioning

confidence: 99%

Membrane fouling and control in algae-rich water treatment

Gao,

Xie

2024

E3S Web Conf.

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Microfiltration and ultrafiltration membrane technology has now become one of the important methods for algae-rich water treatment due to its better solid-liquid separation effect and microbial retention capacity, while the existence of membrane fouling has been restricting the full-scale promotion and application of low-pressure membrane technology. The main foulants causing membrane fouling in algal-rich water include algal cells, algal debris and algal organic matter AOM (EOM and IOM). In this paper, the mechanism of membrane fouling caused by algal foulants in MF/UF for high algal water treatment is analysed in terms of both individual and composite fouling. Both individual and composite effects of algal foulants can lead to severe membrane fouling, in which algal cells and algal debris mainly dominate the accumulation of filter cake, while AOM mainly leads to membrane pore blockage membrane fouling is exacerbated by compounding effects, with severe reversible and irreversible fouling caused by filter cake formation and membrane pore shrinkage. This paper also discusses several common membrane fouling control methods, including pretreatment (oxidation, coagulation, combined oxidation-coagulation and adsorption) and membrane modification, and it is found that these several membrane fouling control methods can achieve good results.

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Section: Adsorption Pre-treatmentmentioning

confidence: 99%

Membrane fouling and control in algae-rich water treatment

Gao,

Xie

2024

E3S Web Conf.

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“…In the process of clean water treatment of drinking water with surface water as the source of water, natural organic matter (NOM) is considered to be the main substance causing membrane fouling, and substances of different components in NOM cause different forms of pollution. Algae organic matter and microbial source organic matter are endogenous organic pollutants, and extracellular organic matter, intracellular organic matter and algal cell residues released by algae can cause ultrafiltration membrane contamination [21] .…”

Section: Pac-ufmentioning

confidence: 99%

Numerical simulation and analysis of coupled Thermal-Hydrological-Mechanical in coalbed methane heating mining

2018

AJSRE

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There are widespread eutrophication problems in lakes and rivers in China. Eutrophication means that the water body receives too much nutrients such as nitrogen and phosphorus, and the organic matter is excessive. When the algae dies, it rots, causing the water quality to deteriorate, thereby causing damage and destruction of the ecological functions of the water, bringing huge use of water resources. loss. While a considerable number of countries or regions use lakes, rivers, etc. as drinking water sources, the problems caused by eutrophication cannot be ignored, and it is urgent to find a reliable and effective method to provide safe water supply. The combination process with ultrafiltration as the core removes algae and has good effects, low energy consumption, simple process and easy control, and has broad application prospects in the future water treatment industry. However, the problem of membrane fouling is still seriously hindering the further development of membrane technology in the water treatment industry.

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Unique characteristics of algal dissolved organic matter and their association with membrane fouling behavior: a review

Maqbool

Hur

2017

Environ Sci Pollut Res

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Over the last several decades, the frequent occurrence of algal bloom in drinking water supplies, driven by increasing anthropogenic input and climate change, has posed serious problems for membrane filtration processes, resulting in reduced membrane permeability and increased energy consumption. It is essential to comprehensively understand the characteristics of algal dissolved organic matter (DOM) and the subsequent effects on the filtration processes for better insight into membrane fouling mitigation. Many studies have revealed that algal DOM has displayed unique characteristics distinguished from other sources of DOM with respect to the chemical composition, the structures, and the molecular weight distributions. Algal DOM is considered to be a major obstacle in understanding membrane fouling due to its complicated interactions among dissimilar algal DOM constituents as well as between algal DOM and membrane material matrices. The present review article summarizes (1) recent characterizing methods for algal DOM, (2) environmental factors affecting the characteristics of algal DOM, (3) the discrepancies between algal DOM and other sources of aquatic DOM, particularly terrestrial sources, and (4) potential fouling effects of algal DOM on membrane filtration processes and their associations with algal DOM characteristics. A broad understanding of algal DOM-driven membrane fouling can lead to breakthroughs in efficient membrane filtration processes to treat algal bloom water sources.

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Fouling control of PAC/UF process for treating algal-rich water

Cited by 26 publications

References 36 publications

Membrane fouling and control in algae-rich water treatment

Membrane fouling and control in algae-rich water treatment

Numerical simulation and analysis of coupled Thermal-Hydrological-Mechanical in coalbed methane heating mining

Unique characteristics of algal dissolved organic matter and their association with membrane fouling behavior: a review

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