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An Eco-tank system containing microbes and different aquatic plant species for the bioremediation of N,N-dimethylformamide polluted river waters
- Source :
- Journal of hazardous materials. 320
- Publication Year :
- 2016
-
Abstract
- An Eco-tank system of 10m was designed to simulate the natural river. It consisted of five tanks sequentially connected containing microbes, biofilm carriers and four species of floating aquatic plants. The purification performance of the system for N,N-dimethylformamide (DMF) polluted river water was evaluated by operating in continuous mode. DMF was completely removed in Tanks 1 and 2 at influent DMF concentrations between 75.42 and 161.05mg L-1. The NH4+-N concentration increased in Tank 1, followed by a gradual decrease in Tanks 2-5. Removal of NH4+-N was enhanced by aeration. The average effluent NH4+-N concentration of Tank 5 decreased to a minimum of 0.89mg L-1, corresponding to a decrease of 84.8% when compared with that before aeration. TN concentration did not decrease significantly as expected after inoculation with denitrifying bacteria. The average effluent TN concentration of the system was determined to be 4.58mg L-1, still unable to satisfy the Class V standard for surface water environmental quality. The results of this study demonstrated that the Eco-tank system is an efficient process in removing DMF, TOC, and NH4+-N from DMF polluted river water. However, if possible, alternative technologies should be adopted for controlling the effluent TN concentration.
- Subjects :
- Environmental Engineering
Nitrogen
Health, Toxicology and Mutagenesis
0208 environmental biotechnology
02 engineering and technology
010501 environmental sciences
01 natural sciences
Denitrifying bacteria
Magnoliopsida
Bioremediation
Rivers
Aquatic plant
Environmental Chemistry
Waste Management and Disposal
Effluent
Environmental Restoration and Remediation
0105 earth and related environmental sciences
Microbiota
Environmental engineering
Dimethylformamide
Continuous mode
Pollution
020801 environmental engineering
Environmental chemistry
Denitrification
Environmental science
N dimethylformamide
Aeration
Surface water
Water Pollutants, Chemical
Subjects
Details
- ISSN :
- 18733336
- Volume :
- 320
- Database :
- OpenAIRE
- Journal :
- Journal of hazardous materials
- Accession number :
- edsair.doi.dedup.....c86992bd78cb2d5bfed61b0607d8fe99