Badri ’s Questions
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Badri posted a question Ozone based ground water treatment 2 years ago
Ozone is an oxidant used for the treatment of contaminated groundwater. But it is hazardous to human health, causing respiratory problems. In such a case, how is the oxidant kept in check?
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Badri posted a question What is bioconversion of biomass to mixed alcohol fuels? 2 years ago
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Through bioconversion of biomass to a mixed alcohol fuel, more energy from the biomass will end up as liquid fuels than in converting biomass to ethanol by yeast fermentation.The process involves a biological/chemical method for converting any biodegradable material (e.g., urban wastes, such as municipal solid waste, biodegradable waste, and sewage sludge, agricultural residues such as corn stover, sugarcane bagasse, cotton gin trash, manure) into useful chemicals, such as carboxylic acids (e.g., acetic, propionic, butyric acid),ketones (e.g., acetone, methyl ethyl ketone, diethyl ketone) and biofuels, such as a mixture of primary alcohols (e.g., ethanol, propanol, n-butanol) and/or a mixture of secondary alcohols (e.g., isopropanol, 2-butanol, 3-pentanol).
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Badri posted a question Pathogen removal from run off water 2 years ago
Pathogens like Salmonella and parasitic worms could be present in nonpoint source runoff, and can be a source of disease if they enter drinking water supplies. Can someone tell me how this can be prevented?
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Coliform bacteria may also be present in runoff. These bacteria are a commonly used indicator of water pollution, but not an actual cause of disease. Pathogens tend to contaminate runoff due to poorly managed livestock operations; one way to keep it contaminant free is by keeping the septic systems in check, and proper handling of pet waste.
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Wont this be more useful for power generation from waves?
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Badri posted a question Ways to bring down chemical oxygen demand 2 years ago
Some samples of water contain high levels of oxidizable inorganic materials which may interfere with the determination of chemical oxygen demand (COD). Because of its high concentration in most wastewater, chloride is often the most serious source of interference. How can this be avoided?
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Prior to the addition of other reagents, mercuric sulfate can be added to the sample to eliminate chloride interference. It forms mercuric chloride compound when the inorganic chloride is eliminated.
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Badri posted a question Different types of starches are used for bio plastic production. Which one of them is ideal for blending with petro chemical based thermoplastic? 2 years ago
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Starch blends are produced by processing destructurized starch (TPS), chemically modified starch or sometimes even native starch in combination with petrochemical or inorganic compounds into a homogenous material. Native starch is a rarity though for blending purposes.
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Badri posted a question I heard about a new Atmospheric Pressure Plasma Liquid Deposition (APPLD) technology. Could someone elaborate the process 2 years ago
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Plasma enhanced coating processes are well known as a route to well adhered, conformal, high performance coatings. These processes deliver industrial coatings without the need for solvent, surfactant and drying ovens. Atmospheric Pressure Liquid Deposition Operates at atmospheric pressure and ambient temperature and allows the use of a wide range of liquid precursors delivering high coating rates onto flexible substrates.
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Badri posted a question Phosphorous removal from waste water 2 years ago
Phosphorus removal is important as it is a limiting nutrient for algae growth in many fresh water systems. Are there any efficient technologies to remove the phosphorous from wastewater?
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Phosphorus can be removed biologically in a process called enhanced biological phosphorus removal. In this process, specific bacteria, called polyphosphate accumulating organisms (PAOs), are selectively enriched and accumulate large quantities of phosphorus within their cells (up to 20 percent of their mass). When the biomass enriched in these bacteria is separated from the treated water, these biosolids have a high fertilizer value.
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Badri posted a question How are regenerated cellulosic polymers obtained from linters? 2 years ago
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Linters are short cotton fibers which contain up to 95% pure cellulose together with small amounts of proteins, waxes, pectins, and inorganic impurities. Due to relatively high cellulose concentration and very low competing impurities, linters are one of the simplest of feedstock's that could be used for production of cellulosic polymers. Cellulose from the linters is subjected to grinding, followed by strong alkali treatment, which usually is caustic soda. The addition of alkali to the cellulose causes ripening and depolymerization. The addition of carbon di sulfide to the depolymerized cellulose, results in cellulose xanthane which then gets converted to viscose. The viscose is then extruded in an acid bath to generate cellulosic fibers or cellulosic polymers.
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Badri posted a question Improvisation in Open Pond Designs 2 years ago
Open ponds apparently are the favourite among many algal producers. It is comparatively cheap and easy to operate. However it has some obvious disadvantages. How can we improvise and minimise these disadvantages? Is it possible to make small innovations and increase their efficiency?
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The use of open pond has a long list of drawbacks and a small innovation can't make any difference at all in the productivity of open ponds. However innovatively you modify your open pond, at the end of the day it is an open pond. It is the same open pond that is going to have the two greatest problems - evaporation and contamination.
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Vaish 2
years ago
Answer this question / Share a linkFor worker safety, site that is using ozone as the oxidant must test ozone levels in the air periodically. All oxidants must be stored properly so that they do not decompose and workers must ensure that they do not have skin contact with any of the oxidants.