Effect of bioaugmentation and biostimulation on hydrocarbon degradation and microbial community composition in petroleum-contaminated loessal soil

Autor: Jialuo Wu, Manli Wu, Xi-Qiong Ye, Xiaohui Zhang
Rok vydání: 2019
Předmět:
Bioaugmentation
China
Environmental Engineering
Environmental remediation
Nitrogen
Health
Toxicology and Mutagenesis
0208 environmental biotechnology
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
complex mixtures
01 natural sciences
Biostimulation
Soil
Nutrient
Environmental Chemistry
Soil Pollutants
Environmental Restoration and Remediation
Soil Microbiology
0105 earth and related environmental sciences
Phosphorus
Microbiota
Public Health
Environmental and Occupational Health
High-Throughput Nucleotide Sequencing
General Medicine
General Chemistry
Biodegradation
Pollution
Hydrocarbons
020801 environmental engineering
Biodegradation
Environmental
Petroleum
Microbial population biology
chemistry
Environmental chemistry
Soil water
Environmental science
Zdroj: Chemosphere. 237
ISSN: 1879-1298
Popis: This study assessed the benefits of biostimulation with nitrogen and phosphorous (BS) versus bioaugmentation with native petroleum degrading flora (BA) in terms of petroleum hydrocarbon removal and microbial community structure shift in petroleum-polluted loessal soil. After 12 weeks of remediation, the TPH degradation efficiencies were 28.3% and 13.9% in BS and BA treated soils, respectively. Biostimulation was more effective than bioaugmentation for petroleum hydrocarbon degradation. Soil microbial community composition changed while microbial diversity decreased greatly by bioaugmentation treatment. The inoculum could survive, grow up quickly and become the predominant microorganisms after one week of inoculation. In the biostimulation treatment, microbial community composition is more evenness and richness than in the bioaugmented remediation. The strong positive correlations of the nitrogen and phosphorus with the petroleum hydrocarbon suggest the importance of nutrients for petroleum biodegradation in the contaminated loessal soil. The results indicate that the stabilization and variety of the microbial community structure are essential for the petroleum biodegradation performance. Further engineering is suggested to improve the evenness and richness of the soil microbial community since an abundance of nitrogen and phosphorus nutrients ensures the degraders' activity in the petroleum polluted soil.
Databáze: OpenAIRE
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