Patent application number | Description | Published |
20150104765 | ADAPTIVE GRAMMAR INSTRUCTION FOR PARALLEL STRUCTURES - Techniques are described for an automated grammar teaching system that displays sentences and allows a user to identify parallel structure errors within the sentences, if any. The user may be asked to determine whether the sentences have a parallel structure error, to identify the items that should be made parallel in structure, to select items to be changed from the identified items, and to provide corrections to the selected items so that all the items form consistent parallel structures. Multiple parallel structures may be valid and accepted as correct for a given parallel structure error. To guide the user, user responses may trigger the display of remediation information, which may include reasons why the selected items are incorrect. New sentences in the teaching system may be selected based on historical data maintained for the user. | 04-16-2015 |
20150104766 | ADAPTIVE GRAMMAR INSTRUCTION FOR PRONOUNS - Techniques are described for an automated grammar teaching system that displays sentences and allows a user to identify pronoun errors or noun phrases that should be replaced with pronouns within the sentences, if any. The user may be asked to complete one or more of the following: to determine whether the sentences have a pronoun error or a noun phrase that should be replaced by a pronoun, to identify the type of the pronoun error, to identify the antecedent or core nouns that determine a plurality of the antecedent, to select a replacement sentence to best correct the pronoun error, and/or to locate an incorrectly displayed pronoun or a noun phrase and type a replacement pronoun. To guide the user, user responses may trigger the display of remediation information, which may include reasons why the user response is incorrect. | 04-16-2015 |
20150106704 | ADAPTIVE GRAMMAR INSTRUCTION FOR SUBJECT VERB AGREEMENT - Techniques are described for an automated grammar teaching system that displays sentences and allows a user to identify subject-verb agreement errors within the sentences, if any. The sentences may be presented as single sentences or as part of a paragraph. The user may be asked to determine whether the sentences are correct or incorrect, to identify the locations of verbs that should agree with a subject of the sentence, to identify the core noun that determines whether the subject is singular or plural, and to provide a new verb that agrees with the subject. To guide the user, user responses may trigger the display of remediation information, which may include identifying one or more grammar elements of the sentences that are relevant to identifying the subject-verb agreement errors. New sentences in the teaching system may be selected based on historical data maintained for the user. | 04-16-2015 |
20150106705 | Adaptive Grammar Instruction - Verb Tense - A grammar teaching system provides adaptive practice to build students' grammar skills with respect to verb tense errors. The system displays a sentence to a user, and allows the user to identify the locations of verbs within the sentence and tenses of the identified verbs. The system reinforces correct designations of verbs using visual cues. If a user incorrectly identifies a term as a verb within a sentence, then the system displays information to help the user understand the nature of the incorrectly designated term. The system allows the user to determine whether the sentence includes a verb tense error and to select a particular verb in the sentence to replace in order to correct any verb tense error. The system allows the user to obtain help in correcting a verb tense error by providing optional tasks that step the user through the reasoning needed to correct the error. | 04-16-2015 |
Patent application number | Description | Published |
20090101598 | METHODS FOR REMOVING SUSPENDED SOLIDS FROM A GASIFICATION PROCESS STREAM - A method of removing suspended solids from a gasification process water stream includes, in an exemplary embodiment, providing a gasification process water stream containing process derived suspended solids, settling at least a portion of the suspended solids from the process water stream in a settling apparatus, providing a filter apparatus having a plurality of filter elements, and removing a portion of the settled solids from the settling apparatus. The method also includes precoating the filter elements with the settled solids removed from the settling apparatus, directing a portion of the process water stream from the settling apparatus to the filter apparatus, and filtering the portion of the process water stream directed from the settling apparatus through the precoated filter elements to remove suspended solids particles to form a filtrate. | 04-23-2009 |
20100089740 | METHOD AND SYSTEMS FOR PROCESSING WASTE WATER USING ZERO PROCESS WATER DISCHARGE - A method for processing wastewater is provided. The method includes pretreating a flow of the wastewater using at least one of a softening/clarification system, a sludge handling system, a filtration system, and an ammonia stripping system, evaporating the pretreated flow to produce at least a distillate and an evaporator brine; separating the evaporator brine to produce a liquid recycle stream and salt crystal mixture; and channeling the liquid recycle stream to a feed stream. The method eliminates the salt drying process that significantly reduces the costs of construction and operation of the standard zero process water discharge process. | 04-15-2010 |
20110108405 | GASIFICATION PLANT WITH TOTAL ZERO DISCHARGE OF PLANT PROCESS WATERS - In certain embodiments, a system includes a gasification system configured to output grey water. The system also includes a grey water zero liquid discharge (ZLD) system configured to receive the grey water and to generate a first stream of distillate. The grey water ZLD system comprises an ammonia stripping system. An amount of water into and out of the grey water ZLD system is approximately equal. | 05-12-2011 |
20140263045 | GASIFICATION WASTE WATER TREATMENT USING AIR SEPARATION UNIT OXYGEN - In one embodiment, a method includes gasifying a fuel source using a first oxygen stream supplied from an air separation unit (ASU), discharging a gasifier blowdown from a gasification and scrubbing system configured to gasify the fuel source, generating a grey water from the gasifier blowdown, and biologically treating the grey water in a reactor using a second oxygen stream supplied by the ASU. | 09-18-2014 |
Patent application number | Description | Published |
20090188867 | METHODS AND SYSTEMS FOR PROCESSING WASTE WATER - A method for processing wastewater is provided. The method includes concentrating a flow of the wastewater using a reverse osmosis process membrane, and evaporating the concentrated flow to produce at least distillate and solids. | 07-30-2009 |
20110186489 | GASIFICATION GREY WATER TREATMENT SYSTEMS - In one embodiment, a grey water treatment system includes an oxidation reactor for oxidizing grey water. The grey water treatment system also includes a biological reduction and precipitation system with microbes designed to remove one or more target components from the oxidized grey water. | 08-04-2011 |
20130270181 | SELENIUM REMOVAL USING CHEMICAL OXIDATION AND BIOLOGICAL REDUCTION - Selenium in the form of a reduced species such as selenocyanate is oxidized to produce an oxidized selenium species such as selenate or selenite, and then a biological reduction process is used to remove selenium from the oxidized selenium species. In an example, a chemical oxidant is added to a wastewater containing selenocyanate to produce selenate and selenite. The partially treated wastewater is then fed to a reactor containing a fixed media supporting a biofilm with selenium reducing organisms. The selenium in the selenate and selenite is reduced to an insoluble form of selenium, such as elemental selenium, which precipitates from the wastewater. | 10-17-2013 |
20140127089 | GASIFIER PREHEATER FUEL SYSTEM AND METHODS OF ASSEMBLING SAME - Gasifier preheater fuel and moderator injection apparatus, systems and methods are provided. A preheater distributor ring is securely mounted within the shell dome of a gasification vessel, for the selective discharge of preheat fuel and oxidizer into the vessel during preheating operations, or for the selective discharge of moderating agents into the vessel during normal gasification operations. | 05-08-2014 |
20150014142 | METHOD FOR PROCESSING WASTE WATER USING ZERO PROCESS WATER DISCHARGE - A method for processing wastewater is provided. The method includes pretreating a flow of the wastewater using at least one of a softening/clarification system, a sludge handling system, a filtration system, and an ammonia stripping system, evaporating the pretreated flow to produce at least a distillate and an evaporator brine; separating the evaporator brine to produce a liquid recycle stream and salt crystal mixture; and channeling the liquid recycle stream to a feed stream. The method eliminates the salt drying process that significantly reduces the costs of construction and operation of the standard zero process water discharge process. | 01-15-2015 |
Patent application number | Description | Published |
20090014313 | Low-energy extractive distillation process for dehydration of aqueous ethanol - An energy-efficient extractive distillation process for producing anhydrous ethanol from aqueous/ethanol feeds containing any range of ethanol employs an extractive distillation column (EDC) that operates under no or greatly reduced liquid reflux conditions. The EDC can be incorporated into an integrated process for producing anhydrous ethanol used for gasoline blending from fermentation broth. By using a high-boiling extractive distillation solvent, no solvent is entrained by the vapor phase to the EDC overhead stream, even under no liquid reflux conditions. The energy requirement and severity of the EDC can be further improved by limiting ethanol recovery in the EDC. In this partial ethanol recovery design, ethanol which remains in the aqueous stream from the EDC is recovered in a post-distillation column or the aqueous stream is recycled to a front-end pre-distillation column where the ethanol is readily recovered since the VLE curve for ethanol/water is extremely favorable for distillation. | 01-15-2009 |
20100276821 | VAPOR DISTRIBUTOR FOR GAS-LIQUID CONTACTING COLUMNS - A vapor distributor for use in atmospheric or vacuum columns includes a new design of vapor inlet device, or vapor horn, to provide superior mixing and distribution of a tangential first feed and a vertical second feed. New vapor inlet device has an inlet dividing the first feed into two portions, each flowing in respective housings in opposed circulation directions, and a plurality of vanes for redirection of vapor. Mixing and distribution of feeds by the vapor distributor is further enhanced by inclusion in vapor distributor of a mixer and vapor directing plates. | 11-04-2010 |
20110266134 | Low-Energy Extractive Distillation Process for Dehydration of Aqueous Ethanol - An energy-efficient extractive distillation process for producing anhydrous ethanol from aqueous/ethanol feeds containing any range of ethanol employs an extractive distillation column (EDC) that operates under no or greatly reduced liquid reflux conditions. The EDC can be incorporated into an integrated process for producing anhydrous ethanol used for gasoline blending from fermentation broth. By using a high-boiling extractive distillation solvent, no solvent, is entrained by the vapor phase to the EDC overhead stream, even under no liquid reflux conditions. The energy requirement and severity of the EDC can be further improved by limiting ethanol recovery in the EDC. In this partial ethanol recovery design, ethanol which remains in the aqueous stream from the EDC is recovered in a post-distillation column or the aqueous stream is recycled to a front-end pre-distillation column where the ethanol is readily recovered since the VLE curve for ethanol/water is extremely favorable for distillation. | 11-03-2011 |
20120118154 | Process and apparatus for removal of oxygen from seawater - A process and apparatus is provided for reduction of dissolved oxygen content in seawater from about 8 ppm in the feed seawater to about 10 ppb or less. Significant advantages are achieved by: use of a separator in horizontal alignment to provide high gas-liquid contacting area for separation and de-entrainment within the separator, thereby providing higher throughput; and heating seawater to at least 30° C. and up to 60° C., so as to enhance removal of oxygen from seawater; use of once-through fuel gas as stripping gas and its subsequent combustion for heating the seawater provides for high efficiency and reduction of fouling. The combination of these features allows the amount of residual oxygen in deoxygenated seawater to be reduced to below 10 ppb and as low as 2 ppb. | 05-17-2012 |