Optimizing synergistic microalgae cultivation and photocatalysis processes for antibiotic and nutrient removal in
Lin-Lan Zhuang1, Hongyang Liang1, Weiyi Qian2
1State Key Laboratory of Microbial Technology, Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237 Shandong, China.
Abstract:
Coupling microalgae cultivation and photocatalysis processes exhibits potential for multi-pollutant removal from wastewater. However, the interaction between microalgae and photocatalysis has yet to be investigated. We revealed the indirect function of Chlorella Vulgaris to g-C3N4 could enhance up to 25 % sulfamerazine (SMZ) removal through the secretion of dissolved oxygen (DO), extracellular polymeric substances (EPS), and alkaline substances. Additionally, g-C3N4 degraded SMZ to reduce their toxicity to Chlorella Vulgaris growth. However, the shading effect of the Chlorella Vulgaris and the intrinsic toxicity of g-C3N4 could reduce the each other's performance within a suspension system. Therefore, we designed an attachment-based photoreactor to avoid direct contact between them and maximize the mutual benefits of their secreted substances. Compared to the suspension system, this photoreactor significantly improved the removal of SMZ (5 mg/L), nitrogen (N) and phosphorous (P) by 57 %, 495 % and 112 %, respectively, with operation costs reduced by 66 %, revealing the superiority of this design.
More Related Videos
Related Concept Videos
Antibiotic Selection
Absorption of Nutrients
Enterocytes, which are specialized polar epithelial cells, line the mucosa of the small intestinal walls. These cells...
Optimal Foraging
Development of Antibiotic Resistance
Optimization Problems
Extracorporeal Removal of Drugs: Hemoperfusion and Hemofiltration


