Results of Adding Sludge Micropowder for Microbial Structure and Partial Nitrification and Denitrification in a Filamentous AGS-SBR Using High-Ammonia Wastewater

نویسندگان

چکیده

This work investigated the roles of sludge micropowder addition in microbial structure and partial nitrification denitrification (PND) an extended filamentous aerobic granular sludge-sequencing batch reactor (AGS-SBR) using high-ammonia wastewater. Type 1683 Acinetobacter with a high percentage became dominant filaments, remarkably shifted remained at low level, acting as framework for AGS recovery after addition. The volume index (SVI5) decreased from 114 to 41.7 mL/g, mixed liquid suspended solids (MLSS) extracellular polymers (EPS) both increased balanced 6836 mg/L 113.4 mg/g•MLVSS, respectively. COD NH4+-N were degraded certain degrees end. However, effluent NO2?-N accumulated peak value 97.6 on day 100 (aeration stage), then 45.3 development stirring supplemented SBR 160 (anoxic while influent always zero. Interestingly, influent/effluent NO3?-N zero throughout whole experiment. These results demonstrated that PND was successfully obtained this work. Sludge not only restrained filaments’ overgrowth, but also contributed realization carbon released. Citrobacter Thauera played essential role process wastewater treatment. Running condition, characteristic, important composition.

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ژورنال

عنوان ژورنال: Water

سال: 2023

ISSN: ['2073-4441']

DOI: https://doi.org/10.3390/w15030508