Alkaline solubilization of excess mixed sludge and the recovery of released phosphorus as magnesium ammonium phosphate.
Bioresour Technol
; 249: 783-790, 2018 Feb.
Article
em En
| MEDLINE
| ID: mdl-29136933
ABSTRACT
The alkaline solubilization of excess mixed sludge was investigated and subsequently the released phosphorus was recovered as magnesium ammonium phosphate (MAP). Considerable and rapid release of glycogen and protein was encountered after alkaline addition into the sludge. Only 45.0% of sludge cells were destructed after 240â¯min treatment in R1 while the corresponding ratio was 96.1% in R3 according to the release of DNA. Non-apatite inorganic phosphorus (NAIP) in the alkaline treated sludge decreased due to the dissolution of Al(OH)3 and AlPO4, which was the dominant reason for phosphorus release. Soluble orthophosphate (SOP) in the supernatant of alkaline treated sludge could be recovered quickly with the recovery efficiency of 84.6% within 5â¯min and about 53-55% of P participated in MAP reaction, producing large amounts of acicular crystals.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esgotos
/
Estruvita
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article