PURIFICATION OF BIOGAS, AND METHOD OF RECOVERING PHOSPHORUS IN WASTE LIQUID

PROBLEM TO BE SOLVED: To provide a method of removing/recovering a phosphorous content included in waste liquid as phosphate, and removing hydrogen sulfide included in biogas obtained by methane fermentation, in methane fermentation treatment.SOLUTION: The method is used for removing hydrogen sulfid...

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Bibliographische Detailangaben
Hauptverfasser:	KURODA MASAKAZU, YUZAWA MEGUMI, KOMORI MASATO
Format:	Patent
Sprache:	eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL CHEMISTRY DISPOSAL OF SOLID WASTE FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR LIQUEFIED PETROLEUM GAS LUBRICANTS METALLURGY NATURAL GAS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES RECLAMATION OF CONTAMINED SOIL SOIL SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of removing/recovering a phosphorous content included in waste liquid as phosphate, and removing hydrogen sulfide included in biogas obtained by methane fermentation, in methane fermentation treatment.SOLUTION: The method is used for removing hydrogen sulfide in biogas and removing/recovering phosphorus in waste liquid, in methane fermentation treatment characterized by precipitating and removing phosphorus as iron phosphate by immersing a composite material of iron in waste liquid containing phosphorus generated by methane fermentation in methane fermentation treatment of organic waste, removing hydrogen sulfide in biogas as iron sulfide by bringing the suspension of the iron phosphate into contact with biogas including hydrogen sulfide generated by methane fermentation, and recovering a phosphoric acid solution generated there as a water-soluble phosphate by being reacted with calcium hydroxide and/or magnesium hydroxide.