salinity wastewater
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Desalination ◽  
2022 ◽  
Vol 525 ◽  
pp. 115390
Qing-Bai Chen ◽  
Zhenhua Tian ◽  
Jinli Zhao ◽  
Jianyou Wang ◽  
Peng-Fei Li ◽  

Desalination ◽  
2021 ◽  
Vol 517 ◽  
pp. 115263
Xin Liu ◽  
Shi Bu ◽  
Lin Zhang ◽  
Yuzhu Zhou ◽  
Jiamei Fang ◽  

2021 ◽  
Vol 0 (0) ◽  
Wei Kang ◽  
Xiyu Cui ◽  
Yanrui Cui ◽  
Linlin Bao ◽  
Kaili Ma

Abstract The discharge of wastewater containing both high salinity and high organic content without prior treatment is detrimental to aquatic life and water hygiene. In order to integrate the advantages of membrane treatment and biological treatment, and exert the phosphorus removal efficiency of dewatered alum sludge, in this study, an aerobic membrane reactor based on dehydrated alum sludge was used to treat mustard tuber wastewater with salinity of 6.8-7.3 % under the conditions of 30 °C, 20 kPa trans-membrane pressure (TMP) and chemical oxygen demand (COD) of 3300-3900 mg/L. Three replicate reactors were applied to assess the operational performance under different organic loading rate (OLR). The results showed that all reactors were effective in removing COD, ammonia nitrogen (NH4 +-N) and soluble phosphate (SP) under the conditions of 30 °C and 20 kPa of TMP. Meanwhile, the effluent concentration of COD, NH4 +-N and SP all increased while OLR was changed from 1.0 to 3.0 kg COD/m3/day, and the effluent COD and NH4 +-N concentration except for SP could reach the B-level of Chinese “Wastewater quality standards for discharge to municipal sewers” when OLR was less than 3.0 kg COD/m3/day. This indicates that dewatered alum sludge-based aerobic membrane reactor is a promising bio-measure for treating high salinity wastewater.

Nasrul Hudayah ◽  
Saowaluk Krainara ◽  
Varunee Kongduan ◽  
Pawinee Chaiprasert ◽  
Benjaphon Suraraksa

2021 ◽  
pp. 132460
Ravi Kumar Chhetri ◽  
Sofoklis Karvelas ◽  
Diego Francisco Sanchez ◽  
Ariadni Droumpali ◽  
Argyro Kokkoli ◽  

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 590
Weiwei Cai ◽  
Qiuying Chen ◽  
Jingyu Zhang ◽  
Yan Li ◽  
Wenwen Xie ◽  

Ultrafiltration is widely employed in treating high-salinity organic wastewater for the purpose of retaining particulates, microbes and macromolecules etc. In general, high-salinity wastewater contains diverse types of saline ions at fairly high concentration, which may significantly change foulant properties and subsequent fouling propensity during ultrafiltration. This study filled a knowledge gap by investigating polysaccharide fouling formation affected by various high saline environments, where 2 mol/L Na+ and 0.5-1.0 mol/L Ca2+/Al3+ were employed and the synergistic influences of Na+-Ca2+ and Na+-Al3+ were further unveiled. The results demonstrated that the synergistic influence of Na+-Ca2+ strikingly enlarged the alginate size due to the bridging effects of Ca2+ via binding with carboxyl groups in alginate chains. As compared with pure alginate, the involvement of Na+ aggravated alginate fouling formation, while the subsequent addition of Ca2+ or Al3+ on the basis of Na+ mitigated fouling development. The coexistence of Na+-Ca2+ led to alginate fouling formed mostly in a loose and reversible pattern, accompanied by significant cracks appearing on the cake layer. In contrast, the fouling layer formed by alginate-Na+-Al3+ seemed to be much denser, leading to severer irreversible fouling formation. Notably, the membrane rejection under various high salinity conditions was seriously weakened. Consequently, the current study offered in-depth insights into the development of polysaccharide-associated fouling during ultrafiltration of high-salinity organic wastewater.

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