Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China.
Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China.
Bioresour Technol. 2021 Jan;320(Pt B):124336. doi: 10.1016/j.biortech.2020.124336. Epub 2020 Nov 4.
The impacts of magnesium-ammonium-phosphate (MAP) precipitation on the performance and microbial dynamics in an anaerobic continuously stirred tank reactor (CSTR) coupled with sequencing batch reactor (SBR) for swine wastewater treatment were investigated. In CSTR-SBR systems, an overall higher removal efficiency for COD, NH and POas 98.6%, 98.7% and 97.9% was achieved with MAP precipitation, compared to CSTR-SBR without MAP pretreatment (i.e., 97.5, 74.3% and 19.9% for COD, NH and PO, respectively). With MAP precipitation, the high C/N ratio of 6.6 after anaerobic CSTR was observed. The increase in the richness and diversity of microbial communities in CSTR with MAP was conducive to nitrogen and phosphorus removal, as well as biogas production. The core community was affiliated with bacterial phyla Firmicutes, Bacteroidetes, Proteobacteria, Cloacimonetes, and Spirochaetae. The study provide a new insight into the potential application of MAP precipitation as pretreatment for dealing with nutrient recovery from high-strength swine wastewater.
研究了镁铵磷（MAP）沉淀对厌氧连续搅拌槽式反应器（CSTR）与序批式反应器（SBR）耦合处理猪废水的性能和微生物动态的影响。在 CSTR-SBR 系统中，与没有 MAP 预处理的 CSTR-SBR 相比（即 COD、NH 和 PO 的去除率分别为 97.5%、74.3%和 19.9%），MAP 沉淀实现了对 COD、NH 和 PO 的总体去除效率更高，分别为 98.6%、98.7%和 97.9%。MAP 沉淀后，在厌氧 CSTR 中观察到高 C/N 比为 6.6。MAP 增加了 CSTR 中微生物群落的丰富度和多样性，有利于氮和磷的去除以及沼气的产生。核心群落与细菌门Firmicutes、Bacteroidetes、Proteobacteria、Cloacimonetes 和 Spirochaetae 有关。该研究为 MAP 沉淀预处理作为从高强度猪废水中回收养分的潜在应用提供了新的见解。
