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Advanced treatment technique for swine wastewater using two agents: Thermally polymerized amorphous silica and hydrated lime for color and phosphorus removal and sulfur for nitrogen removal
Author(s) -
Hasegawa Teruaki,
Kurose Yohei,
Tanaka Yasuo
Publication year - 2017
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12803
Subject(s) - lime , phosphorus , effluent , sulfur , chemistry , nitrogen , denitrification , nuclear chemistry , wastewater , pulp and paper industry , materials science , environmental engineering , metallurgy , organic chemistry , environmental science , engineering
Abstract The efficacy of advanced treatment of swine wastewater using thermally polymerized, modified amorphous silica and hydrated lime (M‐ CSH ‐lime) for color and phosphorus removal and sulfur for nitrogen removal was examined with a demonstration‐scale treatment plant. The color removal rate was approximately 78% at M‐ CSH ‐lime addition rates of > 0.055 wt/v%. The PO 4 3 − ‐P removal rate exceeded 99.9% with > 0.023 wt/v%. pH of the effluent from the M‐ CSH ‐lime reactor increased with the addition rate till a maximum value of 12.7, which was effective in disinfection. The recovered M‐ CSH ‐lime would be suitable as a phosphorus fertilizer because the total P 2 O 5 content was approximately 10%. The nitrogen oxide ( NO x‐N) removal rate by sulfur denitrification increased to approximately 80% when the NO x‐N loading rate was around 0.1 kg‐N/ton‐S/day. It was suggested that the combination of the two processes would be effective in the advanced treatment of swine wastewater.