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Influence of Source Characteristics, Chemicals, and Flocculation on Chemically Enhanced Primary Treatment
Author(s) -
Neupane Dilli R.,
Riffat Rumana,
Murthy Sudhir N.,
Peric Marija R.,
Wilson Thomas E.
Publication year - 2008
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143007x221355
Subject(s) - turbidity , effluent , flocculation , chemistry , chemical oxygen demand , suspended solids , pulp and paper industry , total suspended solids , environmental chemistry , environmental engineering , sewage treatment , environmental science , wastewater , biology , ecology , engineering , organic chemistry
The overall objective of this research was to investigate various methods and parameters to increase the efficiency of chemically enhanced primary treatment (CEPT). The performance of CEPT was evaluated based on its efficiency of removal of nonsettleable solids (NSS). Some of the source characteristics that influenced NSS concentration included influent total suspended solids, influent turbidity, and influent total chemical oxygen demand. A higher concentration of the influent constituents led to a higher NSS concentration, suggesting that NSS represented a somewhat fixed fraction or percent of these influent constituents. The specific particle surface area (SPSA) was found to correlate with percent NSS in the effluent. A higher SPSA is a result of smaller‐sized nonsettleable colloidal particles, thus leading to an increase in percent NSS. In summary, there are several parameters that affect NSS, which could be used to control NSS to improve CEPT, as demonstrated by this study.