Sökning: onr:"swepub:oai:DiVA.org:ltu-15882" >
Biodegradation of B...
Biodegradation of Biosolids Under Aerobic Conditions : Implications for Cover Materials for Sulfide Mine Tailings Remediation
-
- Nason, Peter (författare)
- Univ Waterloo, Dept Earth & Environm Sci
-
- Jia, Yu (författare)
- Department of Environment and Raw Material, Greenland Institute of Natural Resources
-
- Maurice, Christian (författare)
- Luleå tekniska universitet,Geovetenskap och miljöteknik
-
visa fler...
-
- Alakangas, Lena (författare)
- Luleå tekniska universitet,Geovetenskap och miljöteknik
-
- Öhlander, Björn (författare)
- Luleå tekniska universitet,Geovetenskap och miljöteknik
-
visa färre...
-
(creator_code:org_t)
- 2015-04-28
- 2016
- Engelska.
-
Ingår i: Mine Water and the Environment. - : Springer Science and Business Media LLC. - 1025-9112 .- 1616-1068. ; 35:3, s. 273-282
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Sewage sludge residue (biosolids) was investigated for its potential as a long-term tailings cover. Biosolids may prevent oxygen diffusion into underlying sulfide tailings through microbial aerobic biodegradation of organic matter. Biosolids were investigated at laboratory-, pilot-, and field-scale using analysis of total organic matter (TOM) mass reduction and O2, CO2, CH4 concentrations to quantify the biodegradation rate. A 156-day, open microcosm experiment, in which the loss of biosolids mass over time at differing temperatures, mimicking ambient (20–22 °C), mesophilic (34 °C), and thermophilic (50 °C) conditions, indicated that TOM biodegradation was best in the mesophilic temperature range, with 14.8, 27.2, and 26.7 % mass depletion at ambient, mesophilic, and thermophilic conditions, respectively. The data was correlated to field-scale data that evaluated biodegradation rates via decreasing O2 and increasing CO2 concentrations. Field biodegradation rates were less than laboratory rates because lower mean annual temperatures (0.6–0.7 °C) diminished microbial activity. A calibrated model indicates that 20 % of a field application of biosolids will degrade within 2 years. However, the rate declines with time due to exhaustion of the most readily degradable organic fraction. If biodegradation cannot be maintained, the long-term effectiveness of biosolids as a covering material for mine tailings remains a concern.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Nyckelord
- Applied Geology
- Tillämpad geologi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas