- 1. Why HydroThane anaerobic technologies?
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HydroThane, a company with more than 35 years of practical experience, has an excellent reputation and proven track record with industrial clients. The quality of our technologies combined with the excellence of our services makes us stand above our competitors.
- 2. Which COD loads can I treat in an ECSB / anaerobic reactor?
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Loading rates of the HydroThane STP® ECSB reactor are typically in the range of 15 – 35 kg COD/m3.day.
- 3. Which COD concentrations are treatable by means of anaerobic treatment?
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In our systems we can treat COD concentrations from ~1000 ppm up to 100000 ppm. HydroThane will be able to advise you which is the best and most economical solution for your wastewater.
- 4. What is the size of an anaerobic reactor?
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HydroThane can build anaerobic reactors from 50 m3 until 4500 m3. The size of the reactor depends on the water characteristics. Each reactor is specially designed for each client.
- 5. Is a HydroThane ECSB / anaerobic reactor easy to operate? Which parameters should I take into account?
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Yes. HydroThane reactors are fully automated! Operation is therefore very easy. The most important parameters to monitor in an anaerobic process are pH, temperature, nutrient dosing, biomass characteristics (organic content) and wastewater characteristics.
- 6. Which types of industries are suitable for anaerobic treatment of it effluents?
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Anaerobic treatment covers a big range of applications. HydroThane develops and supplies sustainable treatment processes for industrial applications, including breweries and beverage, chemical, pulp and paper, food, bioethanol, dairy and many more!
- 7. Are there organic compounds that cannot be treated by anaerobic technology?
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Almost all organic compounds can be treated by anaerobic digestion. For specific solutions do not hesitate to contact HydroThane.
- 8. What to do with solids in wastewater?
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Solids are an often occurring pollutant in wastewater. Solids, when consisting from organic material, can be taken out using screens or clarifiers and can be degraded in anaerobic solid waste digesters to produce biogas.
- 9. What is anaerobic biomass?
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Anaerobic biomass is biomass consisting out of a mixture of bacteria and structural solids that is able to degrade waste and/or wastewater in the absence of oxygen and produces biogas with a high methane content.
- 10. How fast does the granular biomass (anaerobic bacteria’s) grow?
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The granular biomass growth depends on the wastewater composition. Also, not all bacteria will grow in granules and will therefore be flushed out of the system. The net growth of granules is usually about 1-2% of the kg degraded COD per day.
- 11. What to do with surplus anaerobic sludge produced during the treatment process?
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Unlike Aerobic sludge, anaerobic sludge is of great value. Because the growth of anaerobic sludge is slow compared to aerobic sludge, it is more scarce. The biomass can be sold to others who may need it or can be kept in storage for later use.
- 12. What’s the lifecycle of granular biomass (anaerobic bacteria’s)?
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The lifecycle of the bacteria inside the granule differ from sort to sort. Additionally the certain components in wastewater could speed up this process. However, the lifecycle is not that important. The bacteria are constantly reproducing. Therefore the bacteria in your system are always “fresh”.
- 13. Why is granular biomass so effective?
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Granular anaerobic biomass is effective since it contains all bacteria for waste and/or wastewater degradation in one granule. When a certain substrate is presented to the granule, it will be absorbed and degraded step by step by different groups of bacteria contained in the same granule. It is like a highly productive “city” of bacteria that keep each other alive.
- 14. Why granular biomass could need external nutrient dosing?
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Bacterial cells are composed majority by Carbon, Oxygen, Nitrogen and Hydrogen but also some other micronutrients, such as, Phosphorous, Potassium, Sodium, Magnesium, Iron, Cobalt, etc. Sometimes there are not enough nutrients present in the wastewater to be treated. HydroThane developed special mixture of micronutrients to avoid any scarcity to the process.
- 15. Why are nitrogen and phosphorus so important for the anaerobic digestion process?
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Macro-nutrients -such as N and P- are essential for the growth of anaerobic bacteria. However, the nitrogen and phosphorus requirement for the anaerobic treatment of an industrial wastewater is only a fraction of the amount needed for aerobic processes (typically more than 10 times less).
- 16. What is biogas?
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Biogas is a mixture of gases that are produced when organic matter is broken down by anaerobic microorganisms, in a process called anaerobic digestion. Biogas is primarily composed by methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulfide (H2S), moisture and siloxanes.
- 17. Does anaerobic treatment reduce ecological footprint of industries?
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Yes. During anaerobic digestion biogas and biomethane is produced, which can be used to replace fossil fuels and therefore reduce emissions. Additionally green fertilizers can be produced and carbon is re-used which contributes to a negative carbon footprint.
- 18. What is the calorific value of methane?
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1 Nm3 of pure methane has an upper calorific value of 39.8 MJ (1000 Kcal = 4.18 MJ). When we don’t take in account the heat of condensation, the lower heating value (35.9 MJ/ Nm3 CH4), should be considered.
- 19. What is biogas used for? Where can biogas be used for?
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Biogas is useful for people and industry due to its high methane content. This biogas can therefore be used for heating purposes, running a gas engine to produce electricity or can provide gas to houses in your surroundings.
- 20. How much biogas can I expect from my wastewater?
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The amount of biogas produced from your wastewater is dependent on the composition of the wastewater and pH. However, the amount of methane, the most useful constituent of the biogas, is known. The methane production is 0.35 Nm3 per kilogram degraded COD.
- 21. What is H2S scrubbing?
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Depending on the wastewater’s composition, the biogas may contain toxic and corrosive H2S gas. Scrubbing of H2S is the removal of this gas which reduces toxicity and increases life expectancy of any equipment the biogas is used in.
- 22. Until what concentration can H2S content be reduced by means of a scrubber?
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Typically <100ppm H2S out. Lower values on special request.
- 23. How much caustic consumption can be saved by using a BCSP instead of a traditional chemical scrubber?
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Typically about 7 – 10 times less NaOH consumption than in a traditional caustic scrubber.
- 24. What kind of H2S scrubbers exist?
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There are several types of scrubbers on the market each for his own use. Most popular scrubbers used to this day are chemical (caustic) scrubbers, biological scrubber or a combination of both. The so-called biochemical scrubbers.