{"id":7429,"date":"2022-02-01T09:48:00","date_gmt":"2022-02-01T08:48:00","guid":{"rendered":"https:\/\/peru-rabbit-439936.hostingersite.com\/?p=7429"},"modified":"2022-09-30T08:46:00","modified_gmt":"2022-09-30T07:46:00","slug":"performance-of-a-two-stage-partial-nitritation-anammox-system-treating-the-supernatant-of-a-sludge-anaerobic-digester-pretreated-by-a-thermal-hydrolysis-process","status":"publish","type":"post","link":"https:\/\/lifezerowastewater.eu\/en\/performance-of-a-two-stage-partial-nitritation-anammox-system-treating-the-supernatant-of-a-sludge-anaerobic-digester-pretreated-by-a-thermal-hydrolysis-process\/","title":{"rendered":"Performance of a two-stage partial nitritation-anammox system treating the supernatant of a sludge anaerobic digester pretreated by a thermal hydrolysis process"},"content":{"rendered":"\t\t
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Abstract<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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A two-stage system (partial nitritation (PN) and anammox processes) was used to remove nitrogen from the dewatering liquor originating from the thermal hydrolysis\/anaerobic digestion (THP\/AD) of municipal WWTP sludge. Two strategies were tested to start up the PN reactor: 1) maintaining a fixed hydraulic retention time (HRT) and increasing the ammonium loading rate (ALR) by decreasing the feeding dilution ratio and 2) feeding undiluted dewatering liquor and gradually decreasing the HRT. With diluted feeding, the reactor performance had destabilization episodes that were statistically correlated with the application of high specific ammonium (>\u00a00.6\u00a0g NH4<\/sub>+<\/sup>-N\/(g TSS\u00b7d)) and organic (>\u00a00.7\u00a0g COD\/(g TSS\u00b7d)) loading rates. The second strategy allowed stable PN reactor operation while treating ALR up to 4.8\u00a0g NH4<\/sub>+<\/sup>-N\/(L\u00b7d) and demonstrating that dilution of THP\/AD effluents is not required. The operating conditions promoted the presence of free nitrous acid levels (>\u00a00.14\u00a0mg HNO2<\/sub>-N\/L) inside the PN reactor that inhibited the proliferation of nitrite oxidizing bacteria.<\/p>

Batch activity tests showed that the inhibitory effects of organic compounds present in the THP\/AD dewatering liquor on the ammonia oxidizing bacteria activity can be removed in the PN reactor. Thus, aerobic pretreatment would not be necessary when two-stage systems are used. The PN reactor effluent was successfully treated by an anammox reactor.<\/p>

An economic analysis showed that using two-stage systems is advantageous for treating THP\/AD dewatering liquor. The implementation of an aerobic pre-treatment unit is recommended for WWTPs capacities higher than 5\u00b7105<\/sup>\u00a0<\/span>inhabitants equivalent when one-stage systems are used.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Para acceder al art\u00edculo completo, dir\u00edjase al siguiente link:<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Abstract A two-stage system (partial nitritation (PN) and anammox processes) was used to remove nitrogen from the dewatering liquor originating from the thermal hydrolysis\/anaerobic digestion (THP\/AD) of municipal WWTP sludge. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118],"tags":[],"class_list":["post-7429","post","type-post","status-publish","format-standard","hentry","category-technical-articles"],"yoast_head":"\nPerformance of a two-stage partial nitritation-anammox system treating the supernatant of a sludge anaerobic digester pretreated by a thermal hydrolysis process - Life Zero Waste Water<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lifezerowastewater.eu\/en\/performance-of-a-two-stage-partial-nitritation-anammox-system-treating-the-supernatant-of-a-sludge-anaerobic-digester-pretreated-by-a-thermal-hydrolysis-process\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Performance of a two-stage partial nitritation-anammox system treating the supernatant of a sludge anaerobic digester pretreated by a thermal hydrolysis process - Life Zero Waste Water\" \/>\n<meta property=\"og:description\" content=\"Abstract A two-stage system (partial nitritation (PN) and anammox processes) was used to remove nitrogen from the dewatering liquor originating from the thermal hydrolysis\/anaerobic digestion (THP\/AD) of municipal WWTP sludge. 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