Oil
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I MOil-water separators are devices used to remove oils, greases, and sometimes solids from industrial wastewater and stormwater. They use physical or chemical separation methods like gravity separation, filters, coagulation, and flotation. The design and selection of an oil-water separator depends on factors like the type and size of oil droplets, oil density, water viscosity and flow rate, desired discharge water quality, and the range of oil concentrations. Parallel plate separators use upward flow through media to allow oil to coalesce, float to the surface, and be collected while cleaner water is decanted off.
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Flotation is a process used to separate minerals from gangue by making some particles hydrophobic and causing them to attach to air bubbles. This allows selective extraction of valuable minerals like copper, lead, and zinc from polymetallic ores. It involves making the desired minerals hydrophobic using surfactants, then aerating the slurry to introduce bubbles. The hydrophobic minerals attach to the bubbles and float to the surface to be removed, while the gangue sinks. This separation relies on differences in wettability between minerals and gangue. Flotation provides advantages over sedimentation like higher processing rates and ability to recover low density particles.
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The document discusses coagulation and flocculation as a water treatment process. Coagulation involves adding positively charged chemicals to destabilize negatively charged particles in water by neutralizing their charge. Flocculation then occurs, where the destabilized particles collide and form larger flocs that are more easily removed by sedimentation or filtration. Common coagulants used are metal salts like aluminum and iron salts, as well as organic polymers. The overall process destabilizes particles, increases their size into flocs, and then separates the flocs physically from the water.
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The activated sludge process is a biological wastewater treatment process that uses microorganisms to degrade and remove organic matter and nutrients from wastewater. Wastewater enters an aeration tank where oxygen is injected to promote bacterial growth on dissolved organic matter and the oxidation of ammonia into nitrates. The activated sludge and treated water are then separated in a clarifier, with the sludge recycled to the aeration tank to treat more wastewater, while the effluent undergoes further treatment before discharge.
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The document discusses two types of carbon filters used in water filtration: carbon block filters and granular activated carbon filters. Both use activated carbon to adsorb contaminants via chemical adsorption and catalyst reduction. Carbon block filters are more efficient at contaminant removal due to the solid carbon block structure allowing longer water contact, while granular activated carbon filters can process higher water flow rates. Activated carbon filters are effective at removing chlorine, organics, and odor/taste from water sources.
Ion exchange
Ion exchange is a water treatment method where undesirable ions in water are removed by being swapped with less objectionable ions from an exchange substance. Both the contaminant ions and exchange ions must have the same electrical charge and be dissolved. There are cation exchangers that remove positively charged ions, anion exchangers that remove negatively charged ions, and amphoteric exchangers that remove both. Ion exchange has advantages like long resin life, cheap maintenance, and being environmentally friendly, but disadvantages like fouling of resins from substances in some waters.
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A retention basin manages stormwater runoff by containing surge and releasing it slowly to prevent flooding and downstream erosion while improving water quality. It acts as a replacement for natural absorption processes lost during development. Surface runoff is stored permanently in ponds, allowing increased stormwater management and quality enhancement through natural processes like sedimentation, algal and wetland plant uptake, and bacterial decomposition. Retention basins require a large area of land and are only applicable where there is high rainfall and available free space.
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Electrocoagulation is a technique used to treat wastewater, industrial process water, and ground/surface water by introducing an electric current to sacrificial metal electrodes placed in the water. During electrolysis, ions are released from the anodes that neutralize particle charges in the water, causing contaminants to coagulate and be removed. It has been shown to effectively remove suspended solids, oils, heavy metals, organic compounds, bacteria and viruses. While electrocoagulation can be an expensive process and issues like electrode passivation can reduce efficiency, it has wide applications in water treatment for industries, sewage, and pretreatment.
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This document summarizes the key steps and processes involved in sewage treatment. It first defines sewage as household liquid waste from sources like toilets and sinks that is collected in sewers, sometimes also including industrial waste. The treatment process involves preliminary, primary, and secondary stages to remove solids and organic matter through physical, chemical, and biological processes like sedimentation and activated sludge. Tertiary treatment provides a final polishing step to further improve water quality before discharge through additional filtration or nutrient removal.
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Ion exchange is a water treatment method where undesirable ions in water are removed by being swapped with less objectionable ions from an exchange substance. Both the contaminant ions and exchange ions must have the same electrical charge and be dissolved. There are cation exchangers that remove positively charged ions, anion exchangers that remove negatively charged ions, and amphoteric exchangers that remove both. Ion exchange has advantages like long resin life, cheap maintenance, and being environmentally friendly, but disadvantages like fouling of resins from substances in some waters.
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A retention basin manages stormwater runoff by containing surge and releasing it slowly to prevent flooding and downstream erosion while improving water quality. It acts as a replacement for natural absorption processes lost during development. Surface runoff is stored permanently in ponds, allowing increased stormwater management and quality enhancement through natural processes like sedimentation, algal and wetland plant uptake, and bacterial decomposition. Retention basins require a large area of land and are only applicable where there is high rainfall and available free space.
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Electrocoagulation is a technique used to treat wastewater, industrial process water, and ground/surface water by introducing an electric current to sacrificial metal electrodes placed in the water. During electrolysis, ions are released from the anodes that neutralize particle charges in the water, causing contaminants to coagulate and be removed. It has been shown to effectively remove suspended solids, oils, heavy metals, organic compounds, bacteria and viruses. While electrocoagulation can be an expensive process and issues like electrode passivation can reduce efficiency, it has wide applications in water treatment for industries, sewage, and pretreatment.
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Purifier and carifier
THE PURIFIER: Is correct size gravity disc or dam ring which is responsible for creating an interface between the oil and water.
THE CLARAFIER: Is clarifiers are settling tanks built with mechanical means for continuous removal of solids being deposited by sedimentation.
Purifier and carifier
THE PURIFIER: Is correct size gravity disc or dam ring which is responsible for creating an interface between the oil and water.
THE CLARAFIER: Is clarifiers are settling tanks built with mechanical means for continuous removal of solids being deposited by sedimentation.
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1. The document discusses separation techniques for removing impurities from fuels, including gravity separation and centrifugation.
2. Gravity separation uses settling tanks and centrifuges apply centrifugal force to separate denser components like water and dirt from lighter components like fuel.
3. Centrifugation, or the use of centrifuges, amplifies the effects of gravity through high-speed rotation, allowing for more rapid and continuous separation than gravity alone.
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Lamella clarifier - Khaleeda bt Abdul Karim
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Desalination
Desalination is the process of removing salt and minerals from saline water to produce fresh water suitable for human consumption or irrigation. It involves pre-treating saline water from oceans to remove particles, then using reverse osmosis membranes to separate dissolved minerals and salts from the water. The fresh water is then conditioned and disinfected before being distributed. Desalination provides clean drinking water but has disadvantages such as high costs, environmental impacts from waste and chemicals, large land use, and high energy consumption.
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Filtration is a process that separates solids from fluids by passing the fluid through a medium that allows only the fluid to pass. The fluid that passes through is called the filtrate. Filtration is used to separate particles and fluids in applications like water treatment, sewage treatment, and chemical engineering. There are different types of filtration like hot filtration, cold filtration, vacuum filtration, surface filtration, and depth filtration that use various methods and filter media depending on the application. Biofiltration is a pollution control technique that uses living materials in a bioreactor to capture and degrade pollutants, and is commonly used for wastewater treatment.
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This document discusses different types of sand filters used to filter water, including slow sand filters and rapid sand filters. It explains that sand filters work by allowing waste water full of sludge to pour into the sand, where the sludge is stuck in the sand and filtered out. The filtered water then moves through the sand using gravity or pressure and goes to the next treatment stage. Sand filters have applications for biosand filters, aquarium filters, and pool filters.
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Clarifiers are settling tanks used to remove solid particles and suspended solids from liquids through sedimentation. They work by allowing liquids to pass through while solids settle to the bottom of the tank or float to the surface. Clarified liquid is then removed from the top for further treatment or use, while concentrated solids collected at the bottom, known as sludge, are removed for additional processing. Clarifiers are commonly used in wastewater treatment plants to remove solids before water is discharged or undergoes further treatment.
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This document discusses phase separation of oil and gas production streams. It explains that separation is usually performed as soon as possible for several reasons: it is easier/less costly to process phases separately, produced water can be corrosive, and less energy is required to move separated phases. The document then provides details on common separator components like primary separation, mist extraction, and liquid accumulation sections. It also outlines various methods used to remove oil from gas and gas from oil in separators, such as density difference, impingement, changes in flow properties, coalescence, filtering, settling, agitation, baffling, heat, and chemicals.
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2. Gravity separation uses settling tanks and centrifuges apply centrifugal force to separate denser components like water and dirt from lighter components like fuel.
3. Centrifugation, or the use of centrifuges, amplifies the effects of gravity through high-speed rotation, allowing for more rapid and continuous separation than gravity alone.
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Phase separation occurs in a pressure vessel called a separator that is used to separate well fluids produced from oil and gas wells into gaseous and liquid components. Separators employ mechanisms like gravity settling, centrifugal force, and baffling to separate the phases. Separator design and performance is dependent on factors like flow rates, fluid properties, presence of impurities, and foaming tendencies. Common types of separators include test separators, production separators, and low temperature separators that are used for primary separation, secondary separation, and removal of specific phases like free water.
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1) The document discusses methods for cleaning up oil spills, including booms and skimmers. Booms are used to contain spilled oil and direct it, while skimmers are devices that remove oil from water surfaces.
2) There are different types of booms and skimmers. Booms include fence, round, and inflatable booms. Skimmers include weir, oleophilic, and non-oleophilic skimmers.
3) Proper oil spill cleanup depends on factors like oil type, water temperature, and shoreline. The document reviews how booms and different skimmer types work to help address oil spills.
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Find the solution for one of the toughest mixing applications in the pharmaceutical industry, the production of pharmaceutical creams and ointments. Read a case study on the process, the problem and the solution.
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Lubricants are substances that reduce friction between surfaces in contact. There are different types of lubrication depending on the thickness of the lubricant film between surfaces - hydrodynamic lubrication occurs when a thick, continuous oil film separates surfaces, boundary lubrication involves a very thin film where metal-to-metal contact can happen, and hydrostatic lubrication uses external oil pressure rather than relative surface motion to separate surfaces with a complete oil film. Special additives are needed for extreme pressure lubrication under very high pressures and temperatures.
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To determine which oil is more energy efficient, you should collect data on:
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The lubrication system is essential to prevent engine wear and allow smooth operation. There are several types of lubrication depending on the engine design and needs. The wet sump system uses an oil pump to draw oil from a sump and deliver it under pressure to bearings and moving parts through galleries and passages. A splash system relies on splashing to distribute oil from a sump to parts. A dry sump system uses a remote tank and additional pump for reliability in high performance or unusual operating conditions.
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After crude oil is desalted and dehydrated, it is separated into fractions through distillation. However, the distilled fractions cannot be used directly and require further processing due to differences between crude oil properties and market needs. The complexity of refining processes is also due to environmental regulations that require cleaner products. Distillation involves heating crude oil to separate it based on boiling points, but the distilled fractions need additional conversion processes before they can be used or sold.
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The document describes the purpose and components of an engine lubrication system. The key purposes of lubrication are to reduce friction, seal components, clean the engine, cool the engine, absorb shocks, and absorb contaminants. The main types of lubrication systems are mist/petrol-oil premix, autolube, splash, and pressure-fed wet or dry sump systems. The document outlines the components of these systems including the oil sump, pump, pickup, pressure regulator, filter, galleries, and indicators. It explains how each component functions to circulate oil through the engine.
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Distillation is a key separation process used in petroleum refining to separate crude oil into its various components like gasoline, kerosene, and diesel. Crude oil is first desalted and dewatered before being fed to a distillation unit where it is heated and separated based on differences in boiling points into various hydrocarbon fractions. Further refining processes like reforming, cracking, and hydrotreating are used to convert heavier fractions into lighter, more valuable products like gasoline.
Leaching equipmnts
Leaching is a solid-liquid operation where a solute diffuses from a solid into a liquid. It is used widely in industries like food processing, pharmaceuticals, and metals processing. There are two main types of leaching - unsteady state operations like heap leaching where solids are piled up, and steady state continuous operations using equipment like agitated vessels, thickeners, and continuous countercurrent decantation systems. Selection of leaching equipment depends on factors like nature of solids, solvent used, and whether a batch or continuous process is required.
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Water polluted by dyestuffs compounds is a global threat to health and the environment; accordingly, we prepared a green novel sorbent chemical and Physical system from an algae, chitosan and chitosan nanoparticle and impregnated with algae with chitosan nanocomposite for the sorption of Malachite green dye from water. The algae with chitosan nanocomposite by a simple method and used as a recyclable and effective adsorbent for the removal of malachite green dye from aqueous solutions. Algae, chitosan, chitosan nanoparticle and algae with chitosan nanocomposite were characterized using different physicochemical methods. The functional groups and chemical compounds found in algae, chitosan, chitosan algae, chitosan nanoparticle, and chitosan nanoparticle with algae were identified using FTIR, SEM, and TGADTA/DTG techniques. The optimal adsorption conditions, different dosages, pH and Temperature the amount of algae with chitosan nanocomposite were determined. At optimized conditions and the batch equilibrium studies more than 99% of the dye was removed. The adsorption process data matched well kinetics showed that the reaction order for dye varied with pseudo-first order and pseudo-second order. Furthermore, the maximum adsorption capacity of the algae with chitosan nanocomposite toward malachite green dye reached as high as 15.5mg/g, respectively. Finally, multiple times reusing of algae with chitosan nanocomposite and removing dye from a real wastewater has made it a promising and attractive option for further practical applications.
Climate Change All over the World .pptx
Climate change refers to significant and lasting changes in the average weather patterns over periods ranging from decades to millions of years. It encompasses both global warming driven by human emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. While climate change is a natural phenomenon, human activities, particularly since the Industrial Revolution, have accelerated its pace and intensity
Peatlands of Latin America and the Caribbean
Presented by The Global Peatlands Assessment: Mapping, Policy, and Action at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action
Global Peatlands Map and Hotspot Explanation Atlas
Presented by Alexandra Barthelmes at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action
Evolving Lifecycles with High Resolution Site Characterization (HRSC) and 3-D...
The incorporation of a 3DCSM and completion of HRSC provided a tool for enhanced, data-driven, decisions to support a change in remediation closure strategies. Currently, an approved pilot study has been obtained to shut-down the remediation systems (ISCO, P&T) and conduct a hydraulic study under non-pumping conditions. A separate micro-biological bench scale treatability study was competed that yielded positive results for an emerging innovative technology. As a result, a field pilot study has commenced with results expected in nine-twelve months. With the results of the hydraulic study, field pilot studies and an updated risk assessment leading site monitoring optimization cost lifecycle savings upwards of $15MM towards an alternatively evolved best available technology remediation closure strategy.
Improving the viability of probiotics by encapsulation methods for developmen...
Improving the viability of probiotics by encapsulation methods for developmen...Open Access Research Paper
The popularity of functional foods among scientists and common people has been increasing day by day. Awareness and modernization make the consumer think better regarding food and nutrition. Now a day’s individual knows very well about the relation between food consumption and disease prevalence. Humans have a diversity of microbes in the gut that together form the gut microflora. Probiotics are the health-promoting live microbial cells improve host health through gut and brain connection and fighting against harmful bacteria. Bifidobacterium and Lactobacillus are the two bacterial genera which are considered to be probiotic. These good bacteria are facing challenges of viability. There are so many factors such as sensitivity to heat, pH, acidity, osmotic effect, mechanical shear, chemical components, freezing and storage time as well which affects the viability of probiotics in the dairy food matrix as well as in the gut. Multiple efforts have been done in the past and ongoing in present for these beneficial microbial population stability until their destination in the gut. One of a useful technique known as microencapsulation makes the probiotic effective in the diversified conditions and maintain these microbe’s community to the optimum level for achieving targeted benefits. Dairy products are found to be an ideal vehicle for probiotic incorporation. It has been seen that the encapsulated microbial cells show higher viability than the free cells in different processing and storage conditions as well as against bile salts in the gut. They make the food functional when incorporated, without affecting the product sensory characteristics.
在线办理(lboro毕业证书)拉夫堡大学毕业证学历证书一模一样
学校原件一模一样【微信：741003700 】《(lboro毕业证书)拉夫堡大学毕业证学历证书》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
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一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
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◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
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◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
How about Huawei mobile phone-www.cfye-commerce.shop
How about Huawei mobile phone-www.cfye-commerce.shop
Enhanced action and stakeholder engagement for sustainable peatland management
Enhanced action and stakeholder engagement for sustainable peatland managementGlobal Landscapes Forum (GLF)
Presented by Jan Peters at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action一比一原版(UMTC毕业证书)明尼苏达大学双城分校毕业证如何办理
原件一模一样【微信：6496090】【(UMTC毕业证书)明尼苏达大学双城分校毕业证成绩单学位证】【微信：6496090】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
◆◆◆◆◆ — — — — — — — — 【留学教育】留学归国服务中心 — — — — — -◆◆◆◆◆
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一.毕业证【微信：6496090】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【微信：6496090】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分→ 【关于价格问题（保证一手价格）
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
学历顾问：微信：6496090
Optimizing Post Remediation Groundwater Performance with Enhanced Microbiolog...
Results of geophysics and pneumatic injection pilot tests during 2003 – 2007 yielded significant positive results for injection delivery design and contaminant mass treatment, resulting in permanent shut-down of an existing groundwater Pump & Treat system.
Accessible source areas were subsequently removed (2011) by soil excavation and treated with the placement of Emulsified Vegetable Oil EVO and zero-valent iron ZVI to accelerate treatment of impacted groundwater in overburden and weathered fractured bedrock. Post pilot test and post remediation groundwater monitoring has included analyses of CVOCs, organic fatty acids, dissolved gases and QuantArray® -Chlor to quantify key microorganisms (e.g., Dehalococcoides, Dehalobacter, etc.) and functional genes (e.g., vinyl chloride reductase, methane monooxygenase, etc.) to assess potential for reductive dechlorination and aerobic cometabolism of CVOCs.
In 2022, the first commercial application of MetaArray™ was performed at the site. MetaArray™ utilizes statistical analysis, such as principal component analysis and multivariate analysis to provide evidence that reductive dechlorination is active or even that it is slowing. This creates actionable data allowing users to save money by making important site management decisions earlier.
The results of the MetaArray™ analysis’ support vector machine (SVM) identified groundwater monitoring wells with a 80% confidence that were characterized as either Limited for Reductive Decholorination or had a High Reductive Reduction Dechlorination potential. The results of MetaArray™ will be used to further optimize the site’s post remediation monitoring program for monitored natural attenuation.
Promoting Multilateral Cooperation for Sustainable Peatland management
Presented by Agus Julianto on GLF Peatlands 2024 - 360 Degree Approach to Improving Capacity of Multiple Stakeholders to Manage Peatland Sustainably
原版制作(Newcastle毕业证书)纽卡斯尔大学毕业证在读证明一模一样
学校原件一模一样【微信：741003700 】《(Newcastle毕业证书)纽卡斯尔大学毕业证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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Oil
- 1. OIL-WATER SEPARATOR MUHAMMAD IZZAT BIN MANAF
- 2. INTRODUCTION • Oil-water separators are "in-line" devices used to remove oils and greases (and sometimes solids) from industrial waste streams and storm water discharges • operate by employing various physical or chemical separation methods, including gravity separation, filters, coagulation/flocculation, and flotation • use of any separation process depends on the properties of the oil in the oil/water mixture
- 3. cont. • There are many different design of oil-water separator. Each has different oil separation capability and are used in different industries. • Oil water separators are designed and selected after consideration of oil separation performance parameters • Oil water separators can be designed to treat a variety of contaminants in water including free floating oil, emulsified oil, dissolved oil and suspended solids. • Not all oil separator types are capable of separating all contaminants. The most common performance parameters considered are: – Oil droplet size (in the feed to the separator) – Oil density – Water viscosity (temperature) – Discharge water quality desired – Feed oil concentration and the range of oil concentrations likely – Feed oil water flow (daily and peak hourly)
- 4. Parallel Plate Separator FLOW PROCESS • The beauty of the OWS design lay within the simplicity. As shown in the figure below the feed enters the OWS on the left (for reference) and is immediately directed downward. The feed then flows upward through a media pack. Inside the pack the de- emulsified oil begins to coalesce and float upwards and over a baffle into an isolated oil collection chamber. • The clean liquid that does not float is decanted off the side over an adjustable weir at a liquid level slightly lower than the floating oil. • Any solids that may enter with the feed are separated early in the process and collect in the sludge chambercoalesce:process by which two or more droplets, bubbles or particles merge during contact to form a single daughter droplet, bubble or particle
- 5. Stoke's Law • relates the terminal settling or rise velocity of a smooth, rigid sphere in a viscous fluid of known density and viscosity to the diameter of the sphere when subjected to a known force field (gravity). V = (2gr²)(d1-d2)/9µ V = velocity of rise (cm sec-¹), g = acceleration of gravity (cm sec-²), r = "equivalent" radius of particle (cm), dl = density of particle (g cm -³), d2 = density of medium (g cm-³), and µ = viscosity of medium (dyne sec cm-²).