文档介绍：Mine Water Environ (2013) 32:170–184
DOI -013-0218-8
TECHNICAL ARTICLE
Removal of Metals and Acidity from Acid Mine Drainage
Using Municipal Wastewater and Activated Sludge
Theresa A. Hughes • N. F. Gray
Received: 24 August 2012 / Accepted: 20 February 2013 / Published online: 5 March 2013
Ó Springer-Verlag Berlin Heidelberg 2013
Abstract Co-treatment of acid mine drainage (AMD) and 60–75 % for Mn. These empirical findings are useful for
municipal wastewater (MWW) using the activated sludge developing process design parameters in co-treatment
process is an innovative approach to AMD remediation that systems. Utilizing MWW and activated sludge to remediate
utilizes the alkalinity of MWW and the adsorptive prop- AMD can potentially reduce materials and energy
erties of the wastewater particulates and activated sludge requirements and associated costs.
biomass to buffer acidity and remove metals. The capacity
of these materials to treat AMD was investigated in batch Keywords Adsorption Á Co-treatment Á Neutralization Á
mode metal removal tests using high-strength synthetic Treatment Á Wastewater treatment plant
AMD (pH , Al 120–200 mg/L, Cu 18–30 mg/L, Fe
324–540 mg/L, Mn 18–30 mg/L, and Zn 36–60 mg/L).
Using material from a range of MWW treatment plants, the Introduction
performance of screened and settled MWW, activated
sludges with mixed liquor suspended solids (MLSS) con- Acid mine drainage (AMD) generated during the oxidation
centrations of and g/L, and return activated sludges of mineral surfaces exposed during mineral extraction
with and g/L MLSS were compared. Similar trends leads to the release of dissolved metals, sulfate, and
were observed for the MWW and activated sludges, with hydrogen ions (Stumm and Morgan 1981) into overlying or
removal efficiency generally decreasing in the order infiltrating waters and can severely degrade water quality
Al = Cu [ Mn [ Zn [ Fe. Trends in Fe remov