Photosynthetic bacterial protein production from wastewater: Effects of C/ N and light-oxygen condition

被引：16
作者：
Cao, Kefan [1 ,2 ]
Zhi, Ran [1 ]
Li, Qiangang [3 ]
Zhang, Guangming [1 ]
Wang, Hongjie [4 ]
机构：
[1] Hebei Univ Technol, Sch Energy & Environm Engn, Tianjin 300130, Peoples R China
[2] Tsinghua Univ, Sch Environm, Environm Simulat & Pollut Control State Key Joint, State Environm Protect Key Lab Microorganism Appl, Beijing 100084, Peoples R China
[3] Renmin Univ China, Sch Environm & Nat Resources, 59 Zhongguancun St, Beijing 100872, Peoples R China
[4] Hebei Univ, Coll Life Sci, Inst Ecol & Environm Governance, Baoding 071002, Peoples R China
来源：
JOURNAL OF WATER PROCESS ENGINEERING | 2021年 / 44卷
关键词：
C to N ratio; Light-oxygen condition; Protein; Photosynthetic bacteria (PSB); PURPLE PHOTOTROPHIC BACTERIA; SINGLE-CELL PROTEIN; BIOMASS; RECOVERY; REMOVAL; SYSTEMS;
D O I：
10.1016/j.jwpe.2021.102361
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Photosynthetic bacteria (PSB) can produce protein while treating wastewater, thus contributing to sustainable development. This work aims to clarify the effects of wastewater C to N ratio and light-oxygen condition on protein production performance of PSB. The results showed that PSB could effectively recover protein when C to N ratio was within the range of 5-50 and lower C/N was more favorable. The highest protein productivity in light-anaerobic, dark-aerobic, and light-aerobic condition reached 115.1, 143.4, and 207.7 mg center dot L-1 center dot d-1, respectively. A light-oxygen regulation strategy (aerobic conditions should be chosen for wastewater with low C/ N, while anaerobic condition should be chosen for wastewater with high C/N) was proposed based on protein productivity. Amino acid composition of PSB could keep stable (essential amino acids: around 40%). This work provides basis for treating wastewater with different C to N ratios and promoting the practical applications of PSB protein recovery technology.
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页数：7
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