Performance and microbial communities of a novel integrated industrial-scale pulp and paper wastewater treatment plant
Artikel i vetenskaplig tidskrift, 2021

Ltd Paper production generates pulp and paper wastewater (PPW), and it is difficult to remove the high-level pollutants in PPW efficiently. Herein, an efficient industrial-scale pulp and paper wastewater treatment plant (PP-WWTP) that integrated physicochemical and biological processes is investigated and reported. This PP-WWTP treated 2.3 Mt of wastewater with 17,388 ± 1436 mg/L chemical oxygen demand (COD) annually. The PP-WWTP can effectively remove over 99.81% of the COD. In detail, the physical, anaerobic, aerobic and chemical steps accounted for 41.6%, 40.0%, 11.9%, and 6.5% of COD removal, respectively. The microbial communities of the bioreactors removed the pollutants efficiently and contained diverse microbes. Further metagenomic analyses of the bioreactors identified more than 90,000 genes/gene fragments encoding for carbohydrate-active enzymes (CAZys), demonstrating high lignocellulose degradation ability of the bioreactors at molecular level. The xylanase activity assay showed some lignocellulase in the bioreactors were functional. Recycling the residual heat from the PPW along with energy recovered from biological treatment of the PPW, in the form of biogas (20,000 m³/d), could generate more than 1.5 M USD benefits/y. The results of this study demonstrated that the integrated physicochemical and biological process for PPWW treatment could effectively remove pollutants while generating revenue.

Pulp and paper wastewater treatment

Lignocellulase genes

Energy recovery and recycle

COD removal

Microbial communities

Författare

Jiawei Liang

Zhengzhou University

Wenning Mai

Zhengzhou University

Jia Wang

Zhengzhou University

Xiaoqi Li

Zhengzhou University

Minhua Su

Linköpings universitet

Jiaxu Du

Henan Hengan Environmental Protection Technology Co

Yanwei Wu

Henan Hengan Environmental Protection Technology Co

Jihua Dai

Henan Hengan Environmental Protection Technology Co

Qi Tang

Henan Hengan Environmental Protection Technology Co

Jihong Gao

Jiaozuo Ruifeng Paper Co., LTD

Yingkui Liu

XuZhou Medical University

Jinfeng Tang

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Linköpings universitet

Yongjun Wei

Zhengzhou University

Journal of Cleaner Production

0959-6526 (ISSN)

Vol. 278 123896

Drivkrafter

Hållbar utveckling

Styrkeområden

Produktion

Ämneskategorier

Annan naturresursteknik

Bioenergi

Vattenbehandling

DOI

10.1016/j.jclepro.2020.123896

Mer information

Senast uppdaterat

2021-01-11