Insight into the formation mechanism of algal biofilm in soy sauce wastewater

Qian, Jun; Wan, Ting; Ye, Yuxin; Li, Jingjing; Toda, Tatsuki; Li, Hongwu; Sekine, Mutsumi; Takayama, Yoshiki; Koga, Shinichi; Shao, Shengxi; Li, Fan; Xu, Peiyu

doi:10.1016/j.jclepro.2023.136179

Cited by 18 publications

(1 citation statement)

References 71 publications

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“…Peak A was only identified from ADPE in non-treatment and +s treatment at Ex/Em 390–430/450–500 nm ( Figures 1A, B ), while peaks B and C were detected in +S + C/M(2/40) treatment at Ex/Em 350–380/430–460 nm and 380–410/460–490 nm, respectively ( Figure 1C ). These three peaks were all described as polycarboxylate-type humic acid ( Wang and Zhang, 2010 ; Qian et al, 2023 ).…”

Section: Resultsmentioning

confidence: 99%

Enhancing algal growth and nutrient recovery from anaerobic digestion piggery effluent by an integrated pretreatment strategy of ammonia stripping and flocculation

Qian

Song

et al. 2023

Front. Bioeng. Biotechnol.

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Anaerobic digestion piggery effluent (ADPE) with a quite high ammonium (NH4+) concentration and turbidity (dark brown color) generally requires high dilution before microalgae cultivation, owing to its NH4+ toxicity and color inhibition to algal growth. An integrated pretreatment strategy of ammonia stripping and chemical flocculation may be a more practical pretreatment procedure for enhancing algae yield and nutrient recovery from anaerobic digestion piggery effluent. In this study, we determined the optimum pretreatment strategy of anaerobic digestion piggery effluent for subsequent microalgae cultivation and nutrient recovery. The results showed that the integrated anaerobic digestion piggery effluent pretreatment strategy of high-temperature ammonia stripping and chemical flocculation at a mixed dosage of 2 g L−1 polyaluminum chloride (PAC) and 40 mg L−1 cationic polyacrylamide (C-PAM), and 50 mg L−1 ammonium nitrogen (NH4+-N) enrichment provided maximum algal yield (optical density = 1.8) and nutrient removal (95.2%, 98.7%, 99.3%, and 78.5% for the removal efficiencies of total nitrogen, NH4+-N, total phosphorus, and chemical oxygen demand, respectively) from anaerobic digestion piggery effluent. The integrated pretreatment strategy is expected to become a more practical pretreatment procedure for enhancing algae yield and nutrient recovery from anaerobic digestion piggery effluent.

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Section: Resultsmentioning

confidence: 99%