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Ultrasonic waste activated sludge disintegration for improving anaerobic stabilization.
The pretreatment of waste activated sludge by ultrasonic disintegration was studied in order to improve the anaerobic sludge stabilization. The ultrasound frequency was varied within a range from 41… Expand
THE USE OF ULTRASOUND TO ACCELERATE THE ANAEROBIC DIGESTION OF SEWAGE SLUDGE
The slow degradation rate of sewage sludge in anaerobic digestors is due to the rate limiting step of sludge hydrolysis. The effect of ultrasound pretreatment on sludge degradability was investigated… Expand
Enhancement of anaerobic sludge digestion by ultrasonic disintegration
Biological cell lysis is known to be the rate limiting step of anaerobic sludge stabilization. Shear forces generated by high-power ultrasound can be used to disintegrate bacterial cells in sewage… Expand
Prevalence of clinically relevant antibiotic resistance genes in surface water samples collected from Germany and Australia.
- C. Stoll, J. Sidhu, A. Tiehm, S. Toze
- Medicine, Biology
- Environmental science & technology
- 16 August 2012
The prevalence and proliferation of antibiotic resistant bacteria is profoundly important to human health, but the extent to which aquatic environments contribute toward the dissemination of… Expand
Importance of heterocylic aromatic compounds in monitored natural attenuation for coal tar contaminated aquifers: A review.
- P. Blum, A. Sagner, A. Tiehm, P. Martus, T. Wendel, P. Grathwohl
- Chemistry, Medicine
- Journal of contaminant hydrology
- 1 November 2011
NSO heterocycles (HET) are typical constituents of coal tars. However, HET are not yet routinely monitored, although HET are relatively toxic coal tar constituents. The main objectives of the study… Expand
Surfactant-Enhanced Mobilization and Biodegradation of Polycyclic Aromatic Hydrocarbons in Manufactured Gas Plant Soil
The bioremediation of soil contaminated with polycyclic aromatic hydrocarbons (PAH) often is limited by a low bioavailability of the contaminants. The effect of two nonionic surfactants of the… Expand
Sequential anaerobic/aerobic biodegradation of chloroethenes--aspects of field application.
Because of a range of different industrial activities, sites contaminated with chloroethenes are a world-wide problem. Chloroethenes can be biodegraded by reductive dechlorination under anaerobic… Expand
Toxicity and genotoxicity enhancement during polycyclic aromatic hydrocarbons biodegradation
Several laboratory column percolators were operated in order to study the bioremediation potential of polycyclic aromatic hydrocarbons (PAH)-contaminated soils. The columns contained either soil… Expand
Sequential reductive and oxidative biodegradation of chloroethenes stimulated in a coupled bioelectro-process.
- Svenja T. Lohner, D. Becker, Klaus-Michael Mangold, A. Tiehm
- Medicine, Environmental Science
- Environmental science & technology
- 6 July 2011
This article for the first time demonstrates successful application of electrochemical processes to stimulate sequential reductive/oxidative microbial degradation of perchloroethene (PCE) in mineral… Expand
Quantitative assessment of the embryotoxic potential of NSO-heterocyclic compounds using zebrafish (Danio rerio).
- S. Peddinghaus, M. Brinkmann, +7 authors S. Keiter
- Biology, Medicine
- Reproductive toxicology
- 1 April 2012
Heterocyclic aromatic compounds (NSO-HET) have frequently been detected in the environment. Several studies have concluded that NSO-HET pose a threat to organisms in waters, sediments and soils.… Expand