...ENVIRONMENTAL RESPONSE DIVISION DESIGN, O & M UNIT FUNDAMENTAL PRINCIPLES OF BIOREMEDIATION (An Aid to the Development of Bioremediation Proposals) APRIL 1998 S:\CP\BIOREM\NEW_BIO.DOC TABLE OF CONTENTS Foreword ----------------------------------------------------------------------------------------------------------------------- iv I. INTRODUCTION --------------------------------------------------------------------------------------- 1 II. POTENTIAL ADVANTAGES AND DISADVANTAGES OF BIOREMEDIATION TECHNOLOGIES ------------------------------------------------------------------------------------------- 2 III. IV. A. B. C. D. E. PRESUMPTIVE EVIDENCE FOR BIOREMEDIATION ----------------------------------- 3 GLOSSARY OF TERMINOLOGY -------------------------------------------------------------- 3 Intrinsic Bioremediation --------------------------------------------------------------------------------------------- 4 Engineered Bioremediation ----------------------------------------------------------------------------------------- 4 Combination of Technologies-------------------------------------------------------------------------------------- 4 In Situ Bioremediation ------------------------------------------------------------------------------------------------ 4 Ex Situ Bioremediation ----------------------------------------------------------------------------------------------- 4 V. MICROBIAL ECOLOGY -----------------------------------------------------------------------------...
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...Bioremediation Methodologies Summer Teeters COM/172 June 23, 2014 Sherry Howard Salois Bioremediation Methodologies What is bioremediation? According to the Gale Encyclopedia of Science (2008), bioremediation is any process that purifies an environment polluted by organic or inorganic contaminants with the utilization of microorganisms or other such creatures. Intensive industrialization and inadequate disposal of organic and inorganic compounds have brought about long-term persistent sources of contamination of our environment. This is a major environmental, policy and health issue facing numerous countries today. Current methods for remediation of polluted environments incorporate chemical and physical remediation, incineration and bioremediation. These conventional physicochemical methodologies are for the most part costly and the remediation process is frequently incomplete. However, since its first commercialized use in the 1970s, experts in the environmental field claim that bioremediation has proven itself to be an economically viable and socially acceptable process to remove hazardous wastes from our environment (Cummings, 2010). In the ever-growing bioremediation field, recent advancements in technology have helped develop new methods of removing contaminants from soil more efficiently and cost effectively. The three primary methods of bioremediation incorporate the utilization of microbes, plants and enzymatic remediation. Every one of these three methods...
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...SOIL ECOLOGY AND BIOREMIDIATION Faculty of Engineering and Architecture CIVE 652-Environmental biotechnology By: Contents INTRODUCTION 3 SOIL MICROORGANISMS 3 Bacteria and Actinomycetes 3 Protozoa 3 Algae 4 Fungi 4 Macrofauna and Mesofauna 4 SOIL UNDER OXIC AND ANOXIC CONDITIONS 4 SOIL CYCLES 5 Carbon Cycle 5 Nitrogen Cycle 6 Sulfur Cycle 7 SOIL POLLUTION 7 Main Causes of Soil Pollution: 7 Main Effects of Soil Pollution: 7 SOIL BIOREMEDIATION 8 EX SITU REMEDIATION TECHNIQUES 8 EX SITU NON-BIOLOGICAL REMEDIATION TECHNIQUES 9 1) Ex situ thermal processes 9 2) Ex situ chemical/physical remediation ( Soil scrubbing ) 9 EX SITU BIOLOGICAL REMEDIATION TECHNIQUES 9 1) Composting 10 2) Land farming 11 3)Biopiling ( Heap technique) 12 4) Bioslurry reactor 13 IN SITU REMEDIATION TECHNIQUES 13 IN SITU BIOLOGICAL REMEDIATION TECHNIQUES 14 1) Bioventing 14 2) Biosparging 15 3) Bioaugmentation: 15 4)Biostimulation 15 4) Bioslurping : 16 5) Phytoremediation 16 IN SITU NON-BIOLOGICAL REMEDIATION TECHNIQUES 16 1) In situ thermal processes 16 2) In situ chemical/physical process: Pump and treat processes 16 INFLUENCING FACTORS 16 CONCLUSION 17 Table of figures: Figure 1. Soil microorganisms pie chart 3 Figure 2. Acquisition of phosphate by Mycorrhizal roots………………………………...3 Figure 3. Mycorrhizal roots……………………………………………………………….4 Figure 4. Carbon Cycle 5 Figure 5. Nitrogen Cycle 6 Figure...
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...BACKGROUND P&C, Inc (PC) operations occasionally result in contaminated soil at the company’s US based factories. PC company policy allows contamination cleanup when required by environmental legislation. The company also needs to install smoke filtering systems before the law is instituted early next year. PC is concerned with the financial accounting treatment for two environmental issues: (a) environmental cleanup, and (b) smoke filter installation for year 20x2. Both issues, if not resolved, could lead to legal action against PC if not followed by a prescribed date. The Company needs to determine if the contaminated soil and smoke filter requirement should be disclosed on the financial statements as an asset retirement obligation, loss contingency, or an environmental obligation. APPLICABLE AUTHORITATIVE LITERATURE FASB Accounting Standards Codification (ASC) 410 Asset Retirement and Environmental Obligations FASB Accounting Standards Codification (ASC) 450 Contingencies DISCUSSION OF ALTERNATIVES The following section will address the alternative treatments accounting for both the remedial action and smoke filtration system under US GAAP. Recording both issues as a loss contingency will be discussed first, followed by soil contamination as environmental remediation, then applying the asset retirement obligation treatment for pollution from normal operations. Alternative 1: Contaminated Soil and Smoke Filter Disclose both environmental issues...
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...Marco Crespo Professor Joyce Martin En12 07 February, 2014 Phytoremediation: Seeing Through a Beneficial Solution An accident happened on April 26, 1986, when a unexpected surge of power during a system test destroyed unit 4 of the nuclear power station at Chernobyl in Ukraine, former Soviet Union. A devastating amount of radioactive material was released into the environment. 30 kilometres around the plant around the plant was closed after the accident. About one hundred fifteen thousand people were evacuated around 1986 and in the following years, about two hundred thousand more were also forced to vacate. Sadly, the problem did not end there. Three years after the incident, the International Atomic Energy Agency (IAEA) assessed the situation around the Chernobyl. Toxic metals and radioactive emission like iodine, cesium-137, plutonium and strontium were found in the plants, soil and even animals. Ever since 1991, the Canadian Nuclear Association also noted that there is a sudden increase in the rate of thyroid cancer. This is happened because cesium-137 or radioactive cesium, with a mass number of 137, has the capability to enter the food chain and can be delivered around an internal dosage of radiation before it can be metabolically eliminated. To prevent this from spreading, livestock were only fed plants that are uncontaminated or plants that cannot accumulate heavy metals. After that, a method was introduced to clean the soil from the toxins. This is called...
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...Bioremediation is the use of microorganism metabolism to remove pollutants. Technologies can be generally classified as in situ or ex situ. In situ bioremediation involves treating the contaminated material at the site, while ex situ involves the removal of the contaminated material to be treated elsewhere. Some examples of bioremediation technologies are phytoremediation, bioventing, bioleaching, landfarming, bioreactor, composting, bioaugmentation, rhizofiltration, and biostimulation. Bioremediation can occur on its own (natural attenuation or intrinsic bioremediation) or can be spurred on via the addition of fertilizers to increase the bioavailability within the medium (biostimulation). Recent advancements have also proven successful via the addition of matched microbe strains to the medium to enhance the resident microbe population's ability to break down contaminants. Microorganisms used to perform the function of bioremediation are known as bioremediators.[1] Not all contaminants, however, are easily treated by bioremediation using microorganisms. For example, heavy metals such as cadmium and lead are not readily absorbed or captured by organisms. The assimilation of metals such as mercury into the food chain may worsen matters. Phytoremediation is useful in these circumstances because natural plants or transgenic plants are able to bioaccumulate these toxins in their above-ground parts, which are then harvested for removal.[2] The heavy metals in the harvested biomass...
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...the use of biological systems and bioremediation to degrade, modify, move, transform or sequester environmental contaminants. Traditional methods of remediation include chemical and physical processing and are often plagued with problems such as the creation of toxic bi-products and environmental damage. Bioremediation of a site offers the advantages of lower costs, environmental soundness, insitu or exsitu solutions, higher aesthetics, and increased public acceptance. The following will focus on how microorganisms can be used and manipulated to remediate various sites of environmental contaminants. Bioremediation Definition Bioremediation is the use of microbes, fungi or plants to remove toxic contaminants from a site. This can be accomplished in situ or ex situ. In situ bioremediation involves remediating the contaminant at the site of contamination. In situ remediation requires extensive monitoring to ensure the success of the remediation effort and to control environmental impacts. Ex situ remediation involves removing the contaminants from the site and treating them at a processing location in a bioreactor. While this method may be more financially and environmentally costly, it allows more control over the remediation process. This includes setting growth conditions in the reactor and choosing foreign or engineered microbes that may be more efficient at remediating than native organisms. Advantages Interest in bioremediation has increased in recent years as...
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...Anaerobic bioremediation of groundwater contaminated by chloroethenes Introduction Chloroethenes, such as tetrachloroethylene (PCE) and trichloroethylene (TCE) are one of the contaminants in soil and groundwater which is a significant problem domestically and internationally. Without extracting these contaminants from the ground, the in-situ treatment which directly degrades contaminants in soil or groundwater is now closely watched as an economical remediation technique. Especially, the in-situ bioremediation which degrades contaminants in-situ by activities of microbes is a safer and more economical technique than the physicochemical one and is being developed for practical application. This paper describes that anaerobic bioremediation which cleans up soil and groundwater contaminated by chloroethene such as TCE in-situ by anaerobic bacteria. 1. Degradative mechanism Anaerobic bioremediation is a remediation technique which injects organics, which become electron donors, together with nutrient salts such as nitrogen and phosphorus into groundwater and degrades contaminants by anaerobic bacteria. It is known that PCE and TCE are dechlorinated reductively by anaerobic bacteria and degraded into dichloroethylene (DCE), vinyl chloride (VC), ethylene and likewise, ethane (Fig. 1). Various types of anaerobic bacteria can degrade not only PCE and TCE but also cis-1,2-DCE. Its speed of degradation is relatively fast. On the other hand, by using cis-1,2- DCE and...
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...With these developments, it is obvious that conflicts between parties of different nationalities occur and liability to tax on income of foreigners especially among those engaging in trading venture. Whilst the laws affecting domicile and residence may be sufficiently settled, it is paramount for courts to pursue a detailed analysis to ascertain specific preliminary issues so as to avoid controversial rulings. Courts often handle numerous financial cases that involve what can be best described as foreign or international elements. In such cases, court must decide whether it has the jurisdiction under the Family Law Act 1975 to make a decision on such cases. In the event that it is determined that the court is invested with the jurisdiction to determine the case, the court has to consider whether there is a system of law in foreign country that also has the jurisdiction to handle the case. As it was addressed in the case Attorney General of New Zealand v Ortiz [1984] AC 1, these benefits and costs to either party if the case resolution is made in foreign country as compared with the apparent country should also be a subject of concern. [1] Legal systems in most countries around the world adopt community property regime, which takes effect at the inception of marriage or at the time of divorce. For instance, California and Massachusetts in the United States have adopted community property regimes that support equal division of assets upon divorce. However, this provision...
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...Adapted from Bernhardt & Kinnear (1988). Cases in marketing management, pp. 6-16. Plano, TX: Business Publications, Inc. Pay careful attention to the following points. They are often used by instructors to evaluate either a written or oral analysis. 1. Be complete. Each area of the situation analysis must be discussed, problems and opportunities identified, alternative presented and evaluated using the situation analysis and relevant financial analysis, and a decision must be made. An analysis that omits part of the situation analysis or only recognizes one alternative is not a good analysis. Second, each area must be covered in-depth and within insight. 2. Avoid rehashing case facts. Every case has a lot of factual information. A good analysis uses facts that are relevant to the situation at hand to make summary points of analysis. A poor analysis just restates or rehashes theses facts without making relevant summary comments. 3. Make reasonable assumptions. Every case is incomplete in terms of some piece of information that you would like to have. A good case analysis must make realistic assumptions to fill in the gaps of information in the case. For example, the case may not describe the purchase decision process for the product of interest. A poor analysis would either omit mentioning this or just state that no information is available. A good analysis would attempt to present this purchase decision process by classifying the product and drawing upon real life...
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...are given. It is understandable then that we should seek out more opportunities to apply our skills and make more positive impacts within our jurisdictions. It is this general attitude that led us to get involved in investigating cold cases. How We Got Started Mark had, for several years, been consulting with our Coroner’s Division as a forensic anthropologist. During this time he came to learn that there were numerous coroners’ cases in which the identity of the decedent was unknown. These cases were kept in three-ring binders on a shelf in the Sergeant’s office. Over the years, in the course of this forensic work, we would discuss these cases and the progress that was being made on them. The conversation usually ran along the lines of us asking “any luck with that 1980 homicide victim?” and the sergeant answering “well, we’ve gotten so many new cases that I haven’t been able to even look at it yet.” This went on for a few years and through two different sergeants. One day we, as a crime analysis unit, were brainstorming about how we could broaden our “client base”, as it were. We had been successful in integrating ourselves into our Investigations Bureau and had been involved in numerous major cases. And, of course, we had always been active in producing tactical and strategic analyses for our patrol personnel. But we knew that we could be doing more, particularly given the size and responsibilities of our agency. It was during...
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...BUSINESS CASE Presented to the Accountancy Department De La Salle University In partial fulfillment Of the course requirements In ACCTBA2 (C33) March 2, 2015 A stakeholder is typically concerned with an organization delivering intended results and meeting its financial objectives. In general, a stakeholder can be one of two types: internal (from within an organization) or external (outside of an organization). The stakeholders in this situation are Lanie Marquez and Tim Rodriguez who are also partners in the retail distribution business and their capital contributions are as follows P500,000 and P300,000 respectively they are an internal stakeholder since they are also the owners. The total Capital of both stakeholders is P800,000 and with a monthly salary for both partners at P15,000 on the assumption that both of them will contribute to manage the business equally. Assuming that both managed the business equally the total salary for the year for Lanie and Tim are P180,000 each. They share profit and loss equally and no interest will be given on capital contributed. The problem for this situation is that Lanie is starting to get concerned with the behavior of her other partner Tim. He only manages the business 50% of the time, which will mean that his salary of P15,000 will need to decrease by also 50% since he does not manage the business equally with his partner. The business has seen a downturn in the profit outcome and for the current financial...
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...Ralph’s Grocery and United Food and Commercial Workers Union The case that I chose for the week 6 critical thinking assignment concerns Ralph’s Grocery Company, located in California. It applies to this week’s material due to the fact that the case involves unlawful suspension and discharge of an employee, as reviewed by the National Labor Relations Board. Background In May 2011, Vittorio Razi was an employee at Ralph’s Grocery and was suspended and terminated after he refused to take a drug test without first consulting with his UFCW Local 324 representative. The company (Respondent) says that on the day in question, Razi’s behavior was in question, acting nervous, anxious, agitated, and slurred speech. After a couple managers discussed the...
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... Many people wonder why their own teeth stain so easily. The enamel on your teeth and chromogens are what stains your teeth, but what exact beverage stains teeth the most? I chose this topic because I was curious to know what stains teeth the most. It affects us daily because it could rot your teeth or you can’t pick up hot chicks anymore. So what causes teeth to stain? The temperature causes teeth to expand or contract making it easier for stains. So hot and cold drinks affect that. Color in foods and beverages come from chromogens. Chromogens are intensely pigmented compounds that stick to teeth enamel. Chromogens cause a lot of trouble when they mix and react with other stain causing and stain promoting factors. Tannis may be natural or synthetic tannis is another factor that stains teeth. Tooth enamel is porous making it extremely susceptible to stains. The darker the liquid the darker the stain. There are some examples that stain teeth. Not only sodas bad but also Gatorade. Beets are bad for you also. Mostly cause they’re concentrated. Berries dark skins stain teeth. Ketchup is also really bad because of its bright red color and high levels of acid. Dark liquids and sauces you put on your foods also stain teeth. Colored candy and popsicles both contain colorants that will transfer to the teeth and embed in the porous enamel. Fruit juices, especially grape and cranberry, leave a colorful tinge on the teeth and tongue. Colored sodas instantly discolor teeth. The citric acids...
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...efficient investigative products and services. As a result, the coverage requirements for ANACI and NACLC investigations have been enhanced to support a common content baseline for all agencies. Note that these enhancements apply only to those ANACI and NACLC cases submitted on an SF 86. The purpose of this FIN is to provide you with information concerning what case coverage changes have been made. The case price adjustments necessary to support these changes will be reflected in the FY 2007 case prices. ANACIINACLC Cases Currently, listed and developed issues which are identified in ANACI and NACLC cases (for non-DoD customers) are not pursued beyond the normal scope of the investigation. These cases are returned to the requesting agency so that the agency may decide whether to adjudicate the case based upon the information in hand, conduct additional follow-up themselves, or request a Reimbursable Suitability Investigation (RSI) from FISD to cover the additional issues. Beginning with FY 2007, expansion of these issues will become a standard part of both the ANACI and NACLC products. Effective October 1, 2006, issues apparent at scheduling or developed during the course of the investigation and which fall within the 5-year case coverage period, unless otherwise noted, will be expanded upon according to the following chart (exception: issues which are known to have been covered in previous investigations, or which would reasonably have been expected to...
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