{"id":"https://openalex.org/W1995230538","doi":"https://doi.org/10.1016/0043-1354(89)90119-x","title":"A simple, conceptual mathematical model for the activated sludge process and its variants","display_name":"A simple, conceptual mathematical model for the activated sludge process and its variants","publication_year":1989,"publication_date":"1989-12-01","ids":{"openalex":"https://openalex.org/W1995230538","doi":"https://doi.org/10.1016/0043-1354(89)90119-x","mag":"1995230538"},"language":"en","primary_location":{"id":"doi:10.1016/0043-1354(89)90119-x","doi":"https://doi.org/10.1016/0043-1354(89)90119-x","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0043-1354(89)90119-x","pdf_url":null,"source":{"id":"https://openalex.org/S52566953","display_name":"Water Research","issn_l":"0043-1354","issn":["0043-1354","1879-2448"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-3","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Water Research","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5035465182","display_name":"Nandan Padukone","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I137902535","display_name":"North Carolina State University","ror":"https://ror.org/04tj63d06","country_code":"US","type":"education","lineage":["https://openalex.org/I137902535"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Nandan Padukone","raw_affiliation_strings":["Department of Chemical Engineering, North Carolina State University, Raleigh, NC 27695-7905 USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Chemical Engineering, North Carolina State University, Raleigh, NC 27695-7905 USA","institution_ids":["https://openalex.org/I137902535"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5019510757","display_name":"Graham F. Andrews","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I2800102766","display_name":"Idaho National Laboratory","ror":"https://ror.org/00ty2a548","country_code":"US","type":"facility","lineage":["https://openalex.org/I1325736334","https://openalex.org/I1330989302","https://openalex.org/I2800102766","https://openalex.org/I2801818860"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Graham F. Andrews","raw_affiliation_strings":["Biotechnology Unit, Idaho National Engineering Laboratory, P.O. Box 1625, Idaho Falls, ID 83415, U.S.A"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Biotechnology Unit, Idaho National Engineering Laboratory, P.O. Box 1625, Idaho Falls, ID 83415, U.S.A","institution_ids":["https://openalex.org/I2800102766"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":4660,"currency":"USD","value_usd":4660},"apc_paid":null,"fwci":1.1171,"has_fulltext":false,"cited_by_count":12,"citation_normalized_percentile":{"value":0.74103586,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":93},"biblio":{"volume":"23","issue":"12","first_page":"1535","last_page":"1543"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10564","display_name":"Wastewater Treatment and Nitrogen Removal","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/2310","display_name":"Pollution"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10564","display_name":"Wastewater Treatment and Nitrogen Removal","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/2310","display_name":"Pollution"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11781","display_name":"Wastewater Treatment and Reuse","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/2311","display_name":"Waste Management and Disposal"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T14249","display_name":"Water Quality Monitoring and Analysis","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/2311","display_name":"Waste Management and Disposal"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/activated-sludge-process","display_name":"activated sludge process","score":0.9549999833106995},{"id":"https://openalex.org/keywords/monod-equation","display_name":"Monod equation","score":0.9449999928474426},{"id":"https://openalex.org/keywords/cell-growth-kinetics","display_name":"cell growth kinetics","score":0.7519999742507935},{"id":"https://openalex.org/keywords/substrate-uptake","display_name":"substrate uptake","score":0.9139999747276306},{"id":"https://openalex.org/keywords/stirred-tank-reactor","display_name":"stirred tank reactor","score":0.527999997138977},{"id":"https://openalex.org/keywords/sludge-retention-time","display_name":"sludge retention time","score":0.8539999723434448},{"id":"https://openalex.org/keywords/extracellular-biopolymers","display_name":"extracellular biopolymers","score":0.9010000228881836},{"id":"https://openalex.org/keywords/flocculation","display_name":"flocculation","score":0.9700000286102295},{"id":"https://openalex.org/keywords/extended-aeration","display_name":"extended aeration","score":0.9869999885559082},{"id":"https://openalex.org/keywords/wastewater-treatment-modeling","display_name":"wastewater treatment modeling","score":0.44699999690055847}],"concepts":[{"id":"https://openalex.org/C2777730692","wikidata":"https://www.wikidata.org/wiki/Q815353","display_name":"Activated sludge","level":3,"score":0.7201482653617859},{"id":"https://openalex.org/C98045186","wikidata":"https://www.wikidata.org/wiki/Q205663","display_name":"Process (computing)","level":2,"score":0.641242265701294},{"id":"https://openalex.org/C148815931","wikidata":"https://www.wikidata.org/wiki/Q900689","display_name":"Flocculation","level":2,"score":0.6271681785583496},{"id":"https://openalex.org/C2777289219","wikidata":"https://www.wikidata.org/wiki/Q7632154","display_name":"Substrate (aquarium)","level":2,"score":0.5423574447631836},{"id":"https://openalex.org/C86922832","wikidata":"https://www.wikidata.org/wiki/Q381105","display_name":"Aeration","level":2,"score":0.5388398170471191},{"id":"https://openalex.org/C2775913793","wikidata":"https://www.wikidata.org/wiki/Q3030793","display_name":"Residence time (fluid dynamics)","level":2,"score":0.5291103720664978},{"id":"https://openalex.org/C2780586882","wikidata":"https://www.wikidata.org/wiki/Q7520643","display_name":"Simple (philosophy)","level":2,"score":0.48695239424705505},{"id":"https://openalex.org/C115540264","wikidata":"https://www.wikidata.org/wiki/Q2945560","display_name":"Biomass (ecology)","level":2,"score":0.4522098898887634},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.42641326785087585},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.38841548562049866},{"id":"https://openalex.org/C186060115","wikidata":"https://www.wikidata.org/wiki/Q30336093","display_name":"Biological system","level":1,"score":0.3713265061378479},{"id":"https://openalex.org/C97355855","wikidata":"https://www.wikidata.org/wiki/Q11473","display_name":"Thermodynamics","level":1,"score":0.33199140429496765},{"id":"https://openalex.org/C87717796","wikidata":"https://www.wikidata.org/wiki/Q146326","display_name":"Environmental engineering","level":1,"score":0.2956152558326721},{"id":"https://openalex.org/C57442070","wikidata":"https://www.wikidata.org/wiki/Q221275","display_name":"Sewage treatment","level":2,"score":0.2890892028808594},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.26285257935523987},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.22602063417434692},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.16005539894104004},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.15626955032348633},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.12569543719291687},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.11058276891708374},{"id":"https://openalex.org/C111472728","wikidata":"https://www.wikidata.org/wiki/Q9471","display_name":"Epistemology","level":1,"score":0.0},{"id":"https://openalex.org/C187320778","wikidata":"https://www.wikidata.org/wiki/Q1349130","display_name":"Geotechnical engineering","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0043-1354(89)90119-x","doi":"https://doi.org/10.1016/0043-1354(89)90119-x","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0043-1354(89)90119-x","pdf_url":null,"source":{"id":"https://openalex.org/S52566953","display_name":"Water Research","issn_l":"0043-1354","issn":["0043-1354","1879-2448"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-3","ki-jl-2","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Water Research","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":21,"referenced_works":["https://openalex.org/W588849380","https://openalex.org/W909537954","https://openalex.org/W1538630227","https://openalex.org/W1822743802","https://openalex.org/W1967323176","https://openalex.org/W1990034476","https://openalex.org/W2019596727","https://openalex.org/W2030635568","https://openalex.org/W2042297601","https://openalex.org/W2049204369","https://openalex.org/W2050906118","https://openalex.org/W2058981808","https://openalex.org/W2062062852","https://openalex.org/W2066408803","https://openalex.org/W2074072072","https://openalex.org/W2095996208","https://openalex.org/W2284613439","https://openalex.org/W2337724221","https://openalex.org/W2486189581","https://openalex.org/W2970070215","https://openalex.org/W6662628776"],"related_works":["https://openalex.org/W1968823012","https://openalex.org/W1596416297","https://openalex.org/W2058981808","https://openalex.org/W89603294","https://openalex.org/W2546874159","https://openalex.org/W1587147578","https://openalex.org/W2081834108","https://openalex.org/W2039559175","https://openalex.org/W2730234781","https://openalex.org/W2046861210"],"abstract_inverted_index":null,"counts_by_year":[{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2026-10-30T12:39:25.321706","created_date":"2016-06-24T00:00:00"}
