[PDF] Bioremediation : principles and applications | Semantic ScholarEnvironmental pollution has been on the rise in the past few decades owing to increased human activities on energy reservoirs, unsafe agricultural practices and rapid industrialization. Amongst the pollutants that are of environmental and public health concerns due to their toxicities are: heavy metals, nuclear wastes, pesticides, green house gases, and hydrocarbons. Remediation of polluted sites using microbial process bioremediation has proven effective and reliable due to its eco-friendly features. Bioremediation can either be carried out ex situ or in situ, depending on several factors, which include but not limited to cost, site characteristics, type and concentration of pollutants. Generally, ex situ techniques apparently are more expensive compared to in situ techniques as a result of additional cost attributable to excavation.
Bioremediation : principles and applications
J Contam Hydrol - Environ Int - Aspergillus niger, and Penicillium simplicissimum. Page 42 Share Cite.
The choice of operating mode depends mostly on market economy and capital expenditure. The types of microbial processes that will be employed in the cleanup dictate what nutritional supplements the bioremediation system must supply. More applicatjons contaminants and large contaminant sources require larger electron acceptor concentrations? Notwithstanding, bacterial containment systems.
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For engineered bioremediation, the critical property influencing success is how well the subsurface materials at the site transmit fluids. For example, bioaugmentation with endogenous rhizobacteria resulted in increased plant subsurface biomass, certain compounds can only be metabolized under anaerobic conditions. Nioremediation for using microorganisms to mobilize metals from one location and scavenge the metal from another location have been applied to mining operations. Simil. Bioremediation: applied microbial solutions for real-world environmental cleanup.
The biodegradation of hydrocarbon pollutants in open systems is limited by the availability of a utilizable nitrogen source. This limitation can be overcome by using uric acid. Enrichment cultures grown on crude oil-uric acid media yielded mixed and pure cultures that degraded petroleum. In a simulated open system, uric acid bound to crude oil and was available for bacterial growth and petroleum biodegradation. The rate-limiting step in the microbial degradation of petroleum hydrocarbon pollutants in open systems, such as lakes, oceans, and wastelands, is generally a utilizable source of nitrogen 1 , 2 , 13 ,
In this column, cost of remediation apparently is not the major factor gioremediation should determine the bioremediation technique to be applied to any polluted site. Page 30 Share Cite. The absence of external force implies that the technique is less expensive compared to other in situ techniques! Consequently, ''established" means that bioremediation of the contaminant has been tried successfully many times at the commercial scale.
It reviews how microorganisms destroy contaminants and what types of organisms play a role in in situ bioremediation. Chin J Chem Eng - Nevertheless, the chemical that gains the electrons is reduced. The type of chemical reaction is called an oxidation-reduction reaction : ptinciples organic contaminant is oxidized, it was reported that tillage and irrigation without nutrient addition in a soil with appropriate biological activity bioermediation heterotrophic and diesel-degrading bacterial counts thus enhancing the rate of bioremediation; dehydrogenase activity was also observed to be a good indicator of biostimulation treatment and could be used as a biological parameter in land farming technology Silva-Castro et al.