{"id":"S85123548","label":"Sludge bulking","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85123548","normalized_label":"sludge bulking","broader":["http://id.loc.gov/authorities/subjects/sh85120462","http://id.loc.gov/authorities/subjects/sh85120516"],"aliases":["Activated sludge bulking","Bulking of activated sludge","Bulking of sewage sludge","Bulking sludge"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85123548","provider":"lcsh","revision":"65444f6dbf10e499","taxonomy_revision":"f050b5d4780b1289","title":"Sludge bulking","url":"/topics/S85123548","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"903042387163612740","address_version":"morton4x16-v1","coordinates":[0,20,19335,28672],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}