Effect of high ammonia on granular stability and phosphorus recovery of algal-bacterial granules in treatment of synthetic biogas slurry
Wei Cai,
Peiqi Hu,
Zhaohua Li,
Qun Kang,
Hongbing Chen,
Jin Zhang,
Shujing Zhu
Affiliations
Wei Cai
Hubei Provincial Key Laboratory of Regional Development and Environmental Response, Department of Environmental Engineering, Hubei University, Wuhan, 430062, China
Peiqi Hu
Hubei Provincial Key Laboratory of Regional Development and Environmental Response, Department of Environmental Engineering, Hubei University, Wuhan, 430062, China
Zhaohua Li
Hubei Provincial Key Laboratory of Regional Development and Environmental Response, Department of Environmental Engineering, Hubei University, Wuhan, 430062, China
Qun Kang
Hubei Provincial Key Laboratory of Regional Development and Environmental Response, Department of Environmental Engineering, Hubei University, Wuhan, 430062, China
Hongbing Chen
Hubei Provincial Key Laboratory of Regional Development and Environmental Response, Department of Environmental Engineering, Hubei University, Wuhan, 430062, China
Jin Zhang
Corresponding author.; Hubei Provincial Key Laboratory of Regional Development and Environmental Response, Department of Environmental Engineering, Hubei University, Wuhan, 430062, China
Shujing Zhu
Hubei Provincial Key Laboratory of Regional Development and Environmental Response, Department of Environmental Engineering, Hubei University, Wuhan, 430062, China
The aim of the study was to investigate the application of algal-bacterial granules in treatment of high ammonia wastewater. Two identical cylindrical reactors, i.e., Rc and Rs was used to develop granular sludge system with synthetic biogas slurry. Rs was run under an artificial solar lamp controlled at 12 h power on and 12 h power off (∼10,000 lux); Rc was operated as control (no light). Results showed that algal-bacterial granules (ABGS) developed in Rs exhibited better structural stability in the face of high ammonia influent. Compared with aerobic granules (AGS), ABGS possessed high proteins (PN) content (145.3 mg/g-VSS) in extracellular polymeric substances (EPS) and better O2 mass transfer inner granules. Higher phosphorus (P) removal capacity was obtained in Rs even under 400 mg/L NH3–N which resulted in higher P content in ABGS biomass (56.4 mg/g-TSS). Bioavailable P in ABGS was 44 mg P/g-SS on day 160, approximately 1.53-times higher than that in AGS.
