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Effects of water treatment residual addition on phosphorus in liquid dairy manure
Author(s) -
Meals Donald W.,
Fay James,
Barsotti Michael
Publication year - 2008
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.2008.tb09610.x
Subject(s) - manure , phosphorus , zoology , chemistry , liquid manure , alum , water treatment , agronomy , environmental science , environmental engineering , biology , organic chemistry
Treating livestock manure with drinking water treatment residuals (WTRs) can reduce soluble phosphorus (P) and decrease the risk of P losses from land‐applied manure. At the same time, such beneficial use could provide the water treatment industry with an economical alternative for management of its by‐products. A 10‐day experiment was conducted to assess the effect of addition of 1‐50% w/w alum‐based WTRs on the P content of liquid dairy manure. Reductions in manure‐soluble P concentrations of 6‐79% were achieved at doses ranging from 1 to 50%. Total P levels in manure were reduced by 9‐25% at WTR doses of 10‐50%. Most P reduction appeared to be achieved after 72 h following WTR addition. A WTR dose of 5‐10% could potentially achieve a 20‐30% reduction in soluble P content of liquid dairy manure; greater reductions in soluble P appear to be achievable with higher WTR doses.