Performance, carotenoids yield and microbial population dynamics in a photobioreactor system treating acidic wastewater: Effect of hydraulic retention time (HRT) and organic loading rate (OLR). (January 2016)

• Record Type: Journal Article
• Authors: Liu, Shuli; Zhang, Guangming; Zhang, Jie; Li, Xiangkun; Li, Jianzheng
• Is Part Of: Bioresource technology. Volume 200(2016)
• Page Start: 245
• Page End: 252
• Publication Date: 2016-01
• Subjects: Photobioreactor -- Acidic wastewater -- Hydraulic retention time -- Organic loading rate -- Carotenoids yield; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.10.044
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Effects of HRT and OLR were investigated in a photobioreactor system. The highest biomass production and carotenoids yield were 2719.3 mg/L and 3.91 mg/g-biomass. HRT and OLR have obvious impacts on PNSB and total bacteria dynamics. Abstract: Effects of hydraulic retention time (HRT) and influent organic loading rate (OLR) were investigated in a photobioreactor containing PNSB ( Rhodopseudomonas palustris )-chemoheterotrophic bacteria to treat volatile fatty acid wastewater. Pollutants removal, biomass production and carotenoids yield in different phases were investigated in together with functional microbial population dynamics. The results indicated that properly decreasing HRT and increasing OLR improved the nutrient removal performance as well as the biomass and carotenoids productions. 85.7% COD, 89.9% TN and 91.8% TP removals were achieved under the optimal HRT of 48 h and OLR of 2.51 g/L/d. Meanwhile, the highest biomass production and carotenoids yield were 2719.3 mg/L and 3.91 mg/g-biomass respectively. In addition, HRT and OLR have obvious impacts on PNSB and total bacteria dynamics. Statistical analyses indicated that the COD removal exhibited a positive relationship with OLR, biomass and carotenoids production. PNSB/total bacteria ratio had a positive correlation with the carotenoids yield.