The neglected ammonia leaching calcium in anaerobic granular sludge.

ABSTRACT: Previous researches have primarily emphasized the deleterious impacts of NH₄⁺ on anaerobic granular sludge due to its biotoxicity. Despite this, the role of NH₄⁺ as a monovalent cation in leaching multivalent Ca²⁺, thereby hindering granule formation and undermining its stability, remains underappreciated. This study investigated the potential of NH₄⁺ to leach Ca²⁺ from anaerobic granular sludges. The results indicated that a shock loading of NH₄⁺ at a concentration of 900 mg/L caused a Ca²⁺ leaching of 57.1 mg/L at pH 7.0. In an acidified environment (pH 5.0), the shock loading resulted in a Ca²⁺ release of 127.3 mg/L, a magnitude 5.24 times greater than the

SUBMITTER: Wen HQ 

PROVIDER: S-EPMC10719569 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature