38 research outputs found
Pesticide-degrading organisms and their application in the treatment of spray residues of crop protection products
Samenvatting... I
Summary ... III
List of abbreviations... V
List of symbols and corresponding units ... V
Chapter I Pesticide biodegradation in on-farm biopurification systems:
general background and research objectives ...1
Chapter II Assessment of the success rate of a classical procedure to
enrich and isolate pesticide-degrading bacteria from pesticide-primed
ecosystems...27
Chapter III Linuron-primed soil as supplement for on-farm biopurification
systems to improve linuron mineralization: a microcosm study...41
Chapter IV Stresses sequentially imposed by different environmental
perturbations only moderately affect the linuron mineralization capacity of
on-farm biopurification systems ...59
Chapter V Inverse modeling of linuron degradation and linuron-degrading
population size dynamics in a bioremediation system: parameterizing the
Monod model ...77
Chapter VI Required inoculum density to enhance the linuron
mineralization capacity in on-farm biopurification systems by
bioaugmentation using linuron-primed soil ...89
Chapter VII Assessment of the pesticide degradation and mineralization
capacity of biopurification system microcosms treating complex pesticidecontaminated
waste water and inoculated with appropriate pesticideprimed
materials ...99
Chaptterr VIII Comparison between two bioaugmentation strategies to
enhance pesticide mineralization in on-farm biopurification systems: initial
establishment and long-term robustness...129
Chapter IX General discussion and research perspectives ...157
Appendix...171
References ...179
List of publications ...191nrpages: 191status: publishe
Establishment of multiple pesticide biodegradation capacities from pesticide-primed materials in on farm biopurification system microcosms treating complex pesticide-contaminated waste water
BACKGROUND: On-farm biopurification systems (BPSs) treat pesticide-containing wastewater at farms by biodegradation and sorption processes. The inclusion of pesticide-primed material carrying a pesticide-degrading microbial community is beneficial for improving biodegradation, but no data exist for treating wastewater containing multiple pesticides, as often occurs on farms. In a microcosm set-up, an examination was carried out to determine whether multiple pesticide degradation activities could be simultaneously established in the matrix of a BPS by the simultaneous inclusion of different, appropriate pesticide-primed materials. The microcosms were fed with a mixture of pesticides including the fungicide metalaxyl and the herbicides bentazon, isoproturon, linuron and metamitron, and pesticide-degrading activities were monitored over time. RESULTS: The strategy immediately provided the microcosms with a multiple pesticide degradation/mineralisation capacity, which improved during feeding of the pesticide mixture. Not only did the degradation of the parent compound improve but also that of the produced metabolites and compound mineralisation. The time to achieve maximum degradation/mineralisation capacity depended on the pesticide degradation capacity of the pesticide-primed materials. CONCLUSIONS: The data obtained show that the addition of pesticide-primed materials into the matrix of a BPS as an approach to improve biodegradation can be extended to the treatment of pesticide mixtures.status: publishe
Verwijdering van metalen uit vaste afvalstromen: sluiten van de kringloop
status: publishe
Cultivation and use of algae biomass in the industry, 5 years of research experience by students
status: publishe
Een verbeterde on-site saneringstechniek voor grondwater vervuild met minerale olie
status: publishe
Cyclodextrines accelerate off-site bioremediation of soils contaminated with mineral oil
Soils contaminated with mineral oil are often excavated and bioremediated off-site by biostimulation and biodegradation. The soils are aerated and supplied with the necessary nutrients to accelerate biodegradation. Ideally, without seriously disturbing the soil, the contaminants are completely mineralized and the soil can be reused. However, for some soils the degradation performance is poor despite the sufficient amount of bacteria, oxygen and nutrients present in the soil. The main factor is the limited bioavailability of the mineral oili. As a result, the environmental permits cannot be achieved within a reasonable time period. The use of additives such as cyclodextrin can enhance the bioavailability of the oil and therefore accelerate degradationii. Cyclodextrin is a (α-1,4)-linked oligosaccharide with both an apolar cavity and polair exterior. They are able to encapsulate mineral oil thereby enhancing the solubility and therefore the bioavailability.status: publishe
Potential of a combined technique of ultrasound waves and additives to enhance the ex situ soil washing process
status: publishe
Metallurgical microbial fuel cells for bioelectrochemical remediation and recovery of metals from real-life mixed metal containing waste streams
status: accepte
Ongoing research to enhanced physico-chemical soil remediation techniques
status: accepte