Efficient treatment of digested piggery wastewater via an improved anoxic/aerobic process with Myriophyllum spicatum and bionic aquatic weed

Ze Zhang; Mingjun Zhong; Yaping Sun; Yuhai Liang; Mengxue Liu; Jing Li; Hongcan Cui; Fangang Meng; Zhujian Huang; Lihua Cui

doi:10.1016/j.biortech.2021.125825

Efficient treatment of digested piggery wastewater via an improved anoxic/aerobic process with Myriophyllum spicatum and bionic aquatic weed

Bioresour Technol. 2021 Dec:341:125825. doi: 10.1016/j.biortech.2021.125825. Epub 2021 Aug 31.

Authors

Ze Zhang¹, Mingjun Zhong¹, Yaping Sun¹, Yuhai Liang¹, Mengxue Liu¹, Jing Li¹, Hongcan Cui², Fangang Meng², Zhujian Huang³, Lihua Cui⁴

Affiliations

¹ Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
² School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
³ Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China.
⁴ Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Changsha, Hunan 410125, China. Electronic address: lihcui@scau.edu.cn.

PMID: 34481299
DOI: 10.1016/j.biortech.2021.125825

Abstract

The traditional anoxic/aerobic process (A/O) process is widely used for treating digested piggery wastewater, but the lack of carbon sources leads to poor efficiency. Therefore, the process needs optimization to achieve high-efficiency and low-cost operation mode. In this study, an improved A/O system with bionic aquatic weed and Myriophyllum sp. was established to decontaminate digested piggery wastewater. The average removal efficiencies of chemical oxygen demand (COD), NH₄⁺-N, and total nitrogen (TN) by the improved A/O system was satisfactory. The average removal efficiencies of COD, NH₄⁺-N, and TN were 62.1%, 87.5%, and 61.9%, respectively. High-throughput sequencing identified a number of dominant microorganisms. The relative abundance of Nitrosomonas (ammonia-oxidizing bacteria) and Nitrospira (nitrite-oxidizing bacteria) was 0.07%-3.52% and 0.32%-1.30%, respectively. Combining bionic aquatic weed and Myriophyllum sp. altered the microbial community structure and metabolic pathways. The results demonstrate a cost-effective method for treating digested piggery wastewater.

Keywords: Bionic aquatic weed; Digested piggery wastewater; Improved anoxic/aerobic system; Myriophyllum sp..

MeSH terms

Biological Oxygen Demand Analysis
Bionics
Bioreactors
Nitrogen / analysis
Waste Disposal, Fluid*
Wastewater*

Substances

Waste Water
Nitrogen