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.
Anim Sci J
; 88(10): 1636-1643, 2017 Oct.
Article
de En
| MEDLINE
| ID: mdl-28402014
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 PO43--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 P2 O5 content was approximately 10%. The nitrogen oxide (NOx-N) removal rate by sulfur denitrification increased to approximately 80% when the NOx-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.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Oxydes
/
Phosphore
/
Soufre
/
Couleur
/
Composés du calcium
/
Silice
/
Purification de l'eau
/
Bioréacteurs
/
Eaux usées
/
Azote
Limites:
Animals
Langue:
En
Journal:
Anim Sci J
Sujet du journal:
MEDICINA VETERINARIA
Année:
2017
Type de document:
Article
Pays d'affiliation:
Japon