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Effect of Polyelectrolyte Treatments on Waste Strength of Snap and Dry Bean Wastewaters
Author(s) -
MOORE K. J.,
JOHNSON M. G.,
SISTRUNK W. A.
Publication year - 1987
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1987.tb06649.x
Subject(s) - chemistry , polyelectrolyte , turbidity , chitosan , cationic polymerization , phosphorus , mesophile , chemical oxygen demand , total dissolved solids , food science , bacteria , nuclear chemistry , polymer , wastewater , organic chemistry , environmental engineering , biology , environmental science , ecology , genetics
Processing waters from snap beans (SBW) and dry beans (DBW) were treated with 16 different cationic and anionic polyelectrolytes, singly and in combinations. None of the anionic and only two of the cationic polymers tested worked well for turbidity reduction. Treatments of SBW with Floculite 250 at 10–30 mg/L and of DBW with chitosan at 60–80 mg/L reduced turbidity (NTU) by 81 and 90%, chemical oxygen demand (COD) by 21 and 23%, total solids (TS) by 25 and 8%, suspended solids (SS) by 54 and 44%, dissolved solids (DS) by 22 and 0%, nitrate‐nitrogen by 0 and 39%, and total phosphorus by 74 and 18%, respectively. Total aerobic bacteria, coliform bacteria, and mesophilic bacterial spores were reduced by 68 and 20%, 81 and 90%, and 94 and 96% for SBW and DBW treatments, respectively.