Microbial community and removal of nitrogen via the addition of a carrier in a pilot-scale duckweed-based wastewater treatment system

Carriers were added to a pilot-scale duckweed-based (Lemna japonica 0223) wastewater treatment system to immobilize and enhance microorganisms. This system and another parallel duckweed system without carriers were operated for 1.5 years. The results indicated the addition of the carrier did not sig...

Full description

Saved in:
Bibliographic Details
Published in:Bioresource technology 2015-03, Vol.179, p.549-558
Main Authors: Zhao, Yonggui, Fang, Yang, Jin, Yanling, Huang, Jun, Ma, Xinrong, He, Kaize, He, Zhiming, Wang, Feng, Zhao, Hai
Format: Article
Language:English
Subjects:
Analogies
Araceae - growth & development
Araceae - metabolism
Araceae - radiation effects
Bacteria
Bacteria - metabolism
Biodegradation, Environmental
Carbon - analysis
Carbon dioxide
Carbon Dioxide - isolation & purification
Carriers
Communities
Duckweed
Genetic Variation
Lemna
Light
Microorganisms
Nitrification - radiation effects
Nitrogen - isolation & purification
Nitrogen removal
Phosphorus - analysis
Phylogeny
Pilot Projects
Principal Component Analysis
RNA, Ribosomal, 16S - genetics
Temperature
Waste Disposal, Fluid
Waste Water - microbiology
Wastewater treatment
Water Purification - methods
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Carriers were added to a pilot-scale duckweed-based (Lemna japonica 0223) wastewater treatment system to immobilize and enhance microorganisms. This system and another parallel duckweed system without carriers were operated for 1.5 years. The results indicated the addition of the carrier did not significantly affect the growth and composition of duckweed, the recovery of total nitrogen (TN), total phosphorus (TP) and CO2 or the removal of TP. However, it significantly improved the removal efficiency of TN and NH4(+)-N (by 19.97% and 15.02%, respectively). The use of 454 pyrosequencing revealed large differences of the microbial communities between the different components within a system and similarities within the same components between the two systems. The carrier biofilm had the highest bacterial diversity and relative abundance of nitrifying bacteria (3%) and denitrifying bacteria (24% of Rhodocyclaceae), which improved nitrogen removal of the system. An efficient N-removal duckweed system with enhanced microorganisms was established.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2014.12.037