PROCESS FOR BIOLOGICAL REMOVAL OF NITROGEN FROM WASTEWATER
A process is provided, comprising: (a) supplying ammonium-containing wastewater to a reactor containing granular sludge comprising granules having a core of anammox bacteria and an outer rim of ammonia oxidizing bacteria; (b) subjecting the wastewater to ammonium oxidation at a temperature between 5...
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| creator | LOTTI, Tommaso HENDRICKX, Tim Lucas George VAN LOOSDRECHT, Marinus Cornelis Maria KRUIT, Jans |
| description | A process is provided, comprising: (a) supplying ammonium-containing wastewater to a reactor containing granular sludge comprising granules having a core of anammox bacteria and an outer rim of ammonia oxidizing bacteria; (b) subjecting the wastewater to ammonium oxidation at a temperature between 5 to 25° C., a dissolved oxygen concentration between 0.4 mg/L to 4.0 mg/L, and a hydraulic retention time between 0.5 hours to 1.5 days, obtaining a nitrogen gaseous stream and a dispersion of granular and non-sludge in treated wastewater; and (c) separating the dispersion into a granular sludge stream and a stream of treated wastewater and non-granular sludge, and (d) recycling the granular sludge to the reactor while discharging the non-granular sludge, wherein the granular sludge has a reactor retention time at least ten times the hydraulic retention time, and wherein the retention time of non-granular sludge is no more than three times the hydraulic retention time. |
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(b) subjecting the wastewater to ammonium oxidation at a temperature between 5 to 25° C., a dissolved oxygen concentration between 0.4 mg/L to 4.0 mg/L, and a hydraulic retention time between 0.5 hours to 1.5 days, obtaining a nitrogen gaseous stream and a dispersion of granular and non-sludge in treated wastewater; and (c) separating the dispersion into a granular sludge stream and a stream of treated wastewater and non-granular sludge, and (d) recycling the granular sludge to the reactor while discharging the non-granular sludge, wherein the granular sludge has a reactor retention time at least ten times the hydraulic retention time, and wherein the retention time of non-granular sludge is no more than three times the hydraulic retention time.</description><subject>CHEMISTRY</subject><subject>METALLURGY</subject><subject>TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAKCPJ3dg0OVnDzD1Jw8vT38Xf3dHb0UQhy9fUPA9L-bgp-niFB_u6ufgpuQf6-CuGOwSGu4Y4hrkE8DKxpiTnFqbxQmptBwc01xNlDN7UgPz61uCAxOTUvtSTeNcDI0sLM1MzCydCYCCUAd90o6g</recordid><startdate>20170621</startdate><enddate>20170621</enddate><creator>LOTTI, Tommaso</creator><creator>HENDRICKX, Tim Lucas George</creator><creator>VAN LOOSDRECHT, Marinus Cornelis Maria</creator><creator>KRUIT, Jans</creator><scope>EVB</scope></search><sort><creationdate>20170621</creationdate><title>PROCESS FOR BIOLOGICAL REMOVAL OF NITROGEN FROM WASTEWATER</title><author>LOTTI, Tommaso ; 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(b) subjecting the wastewater to ammonium oxidation at a temperature between 5 to 25° C., a dissolved oxygen concentration between 0.4 mg/L to 4.0 mg/L, and a hydraulic retention time between 0.5 hours to 1.5 days, obtaining a nitrogen gaseous stream and a dispersion of granular and non-sludge in treated wastewater; and (c) separating the dispersion into a granular sludge stream and a stream of treated wastewater and non-granular sludge, and (d) recycling the granular sludge to the reactor while discharging the non-granular sludge, wherein the granular sludge has a reactor retention time at least ten times the hydraulic retention time, and wherein the retention time of non-granular sludge is no more than three times the hydraulic retention time.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY METALLURGY TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE |
| title | PROCESS FOR BIOLOGICAL REMOVAL OF NITROGEN FROM WASTEWATER |
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