Forward osmosis membrane bioreactor using Bacillus and membrane distillation hybrid system for treating dairy wastewater

Song, Hongwei; Liu, Jinrong

Forward osmosis membrane bioreactor using Bacillus and membrane distillation hybrid system for treating dairy wastewater

2021

Song, Hongwei | Liu, Jinrong

Wastewater recycling is one of the best ways to alleviate water scarcity and water/wastewater pollution. The dairy industry is the largest industrial food wastewater source in many countries. In this study, we used a forward osmosis membrane bioreactor (FOMBR) and membrane distillation (MD) hybrid system to recycle dairy wastewater. And we developed a new Bacillus-FOMBR inoculated with salt-tolerant Bacillus sludge to protect against the negative effects of accumulated salt on sludge characteristics, microbial community and treatment effectiveness, and to alleviate membrane biofouling. A laboratory-scale FOMBR-MD experiment was operated for 40 days and water flux, salinity change, sludge characteristics, microbial community, nutrient removal efficiency, and FO membrane fouling were investigated. The Bacillus-FOMBR showed a small decrease in biomass concentration, and the hybrid system removed almost 100% of the contaminants. High-throughput sequencing analysis indicated that Pirellula and Hyphomicrobium species dominated the Bacillus-FOMBR, which are obliged to perform heterotrophic nitrification and aerobic denitrification. These nitrogen-removing bacteria ensured high nitrogen removal efficiency of the bioreactor. The total nitrogen (TN) concentration in the bioreactor increased and then decreased, which did not continuously increase as occurred in conventional FOMBRs. The TN removal efficiency of the bioreactor was mostly above 40% and the highest reached 79%. Besides, the Bacillus-FOMBR suffered little membrane biofouling because of the quorum quenching effect of the Bacillus species. We speculate that the Bacillus-FOMBR has potential to treat high-salt wastewater and high strength ammonia-nitrogen wastewater.

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Palabras clave de AGROVOC

ammonium nitrogen artificial membranes biomass production dairies denitrification distillation nitrification osmosis pollutants quorum sensing salinity sludge total nitrogen wastewater treatment water pollution water reuse

Información bibliográfica

Publicado en

Environmental technology

Volumen 42 Edición 12 Paginación 1943 - 1954 ISSN 1479-487X

Editorial

Taylor & Francis

Otras materias

Animal wastes; Bacillus-fombr; Simultaneous nitrification and denitrification; Heterotrophic bacteria; Quorum quenching; Halophiles; Bacillus (bacteria); Hyphomicrobium; Salt accumulation; Pirellula; Membrane bioreactors; Biofouling; Microbial community structure; Bacterial communities

Idioma

Inglés

Nota

Golden set

This study was financially supported by the Natural Science Foundation of Inner Mongolia [grant number 2017MS0216]; the Higher Educational Scientific Research Projects of Inner Mongolia Autonomous Region [grant number NJZY17095].

Tipo

Text; Journal Article

En AGRIS desde: 2024-02-28

Formato: MODS

Proveedor de Datos

Este registro bibliográfico ha sido proporcionado por National Agricultural Library

Descubra la colección de este proveedor de datos en AGRIS

Enlaces

DOI http://dx.doi.org/10.1080/09593330.2019.1684568

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