scholarly journals Characterization and monitoring of 300 Area facility liquid waste streams: 1994 Annual report

10.2172/52809 ◽  
1995 ◽  
Author(s):  
R Riley ◽  
M Ballinger ◽  
E Damberg ◽  
J Evans ◽  
J Julya ◽  
...  
Keyword(s):  
Annual Report ◽  
Liquid Waste ◽  
Waste Streams

Algae biomass cultivation in nitrogen rich biogas digestate

2015 ◽  
Vol 72 (10) ◽  
pp. 1723-1729 ◽  
Author(s):  
I. Krustok ◽  
J. G. Diaz ◽  
M. Odlare ◽  
E. Nehrenheim
Keyword(s):  
Wastewater Treatment ◽  
Liquid Waste ◽  
Algal Growth ◽  
Significant Inhibition ◽  
Ammonium Concentration ◽  
Biomass Growth ◽  
Waste Streams ◽  
Algae Biomass ◽  
Biogas Digestate ◽  
Ammonium Tolerance

Because microalgae are known for quick biomass growth and nutrient uptake, there has been much interest in their use in research on wastewater treatment methods. While many studies have concentrated on the algal treatment of wastewaters with low to medium ammonium concentrations, there are several liquid waste streams with high ammonium concentrations that microalgae could potentially treat. The aim of this paper was to test ammonium tolerance of the indigenous algae community of Lake Mälaren and to use this mixed consortia of algae to remove nutrients from biogas digestate. Algae from Lake Mälaren were cultivated in Jaworski's Medium containing a range of ammonium concentrations and the resulting algal growth was determined. The algae were able to grow at NH4-N concentrations of up to 200 mg L−1 after which there was significant inhibition. To test the effectiveness of the lake water algae on the treatment of biogas digestate, different pre-cultivation set-ups and biogas digestate concentrations were tested. It was determined that mixing pre-cultivated suspension algae with 25% of biogas digestate by volume, resulting in an ammonium concentration of around 300 mg L−1, produced the highest algal growth. The algae were effective in removing 72.8 ± 2.2% of NH4-N and 41.4 ± 41.4% of PO4-P.

Fixation of Leachable Elements in Composite Waste Forms from North Dakota Lignite Coal Conversion Ash

1987 ◽  
Vol 113 ◽  
Author(s):  
D. J. Hasseti ◽  
D. F. Hassett
Keyword(s):  
North Dakota ◽  
Coal Gasification ◽  
Tap Water ◽  
Liquid Waste ◽  
Waste Incinerator ◽  
Leaching Tests ◽  
Waste Streams ◽  
Ettringite Formation ◽  
Batch Tests ◽  
Waste Forms

ABSTRACTComposite waste forms prepared using solid and liquid waste streams from an integrated coal gasification facility at Beulah, North Dakota, were evaluated for the potential leachability of select trace elements using batch tests. Cylinders were fabricated from seven blends of the solid components using liquid waste incinerator blowdown, multi-effect evaporator concentrate, or tap water. Individual waste forms and composites were leached using the same protocols. Both long term and short term leaching tests were used to evaluate these composite waste forms.Comparisons of measured concentrations of elements with values calculated from data on individual components were used to determine any change in leachability that may have occurred. These changes were expressed as a fixation factor, which is a term derived by dividing the calculated leachability by the measured concentrations from the actual leaching tests. Results from these experiments indicated that leachability of some elements could be lowered by the mixing of various solid and liquid waste streams. Ettringite formation is one possible mechanism responsible for fixation of several of the elements.

Glyphosate degradation by immobilized bacteria: laboratory studies showing feasibility for glyphosate removal from waste water

1992 ◽  
Vol 38 (9) ◽  
pp. 921-928 ◽  
Author(s):  
Michael A. Heitkamp ◽  
William J. Adams ◽  
Laurence E. Hallas
Keyword(s):  
Industrial Effluent ◽  
Liquid Waste ◽  
Industrial Effluents ◽  
High Volume ◽  
Waste Streams ◽  
Immobilized Bacteria ◽  
Production Wastes ◽  
Aminomethylphosphonic Acid ◽  
Low Levels ◽  
Glyphosate Degradation

To evaluate immobilized bacteria technology for the removal of low levels of glyphosate (N-phosphonomethylglycine) from aqueous industrial effluents, microorganisms with glyphosate-degrading activity obtained from a fill and draw enrichment reactor inoculated with activated sludge were first exposed to glyphosate production wastes containing 500–2000 mg glyphosate/L. The microorganisms were then immobilized by adsorption onto a diatomaceous earth biocarrier contained in upflow Plexiglas® columns. The columns were aerated, maintained at pH 7.0–8.0, incubated at 25 °C, supplemented with NH4NO3 (50 mg/L), and exposed to glyphosate process wastes pumped upflow through the biocarrier. Glyphosate degradation to aminomethylphosphonic acid was initially >96% for 21 days of operation at flows yielding hydraulic residence times (HRTs) as short as 42 min. Higher flow rate studies showed >98% removal of 50 mg glyphosate/L from the waste stream could be achieved at a HRT of 23 min. Glyphosate removal of >99% at a 37-min HRT was achieved under similar conditions with a column inoculated with a pure culture of Pseudomonas sp. strain LBr, a bacterium known to have high glyphosate-degrading activity. After acid shocking (pH 2.8 for 18 h) of a column of immobilized bacteria, glyphosate-degrading activity was regained within 4 days without reinoculation. Although microbial growth and glyphosate degradation were not maintained under low organic nutrient conditions in the laboratory, the low levels of degradable carbon (45–94 mg/L) in the industrial effluent were sufficient to support prolonged glyphosate-degrading activity. The results demonstrated that immobilized bacteria technology is effective in removing low levels of glyphosate in high-volume liquid waste streams. Key words: glyphosate, degradation, immobilized bacteria technology.

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