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Title of Journal: Water Sci Technol

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Abbravation: Water Science and Technology

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IWA Publishing

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DOI

10.1016/0020-1790(91)90090-2

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ISSN

0273-1223

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Treatment of gypsum waste in a two stage anaerobic

Authors: Deswaef S Salmon T Hiligsmann S Taillieu X Milande N Thonart Ph Crine M
Publish Date: 1996/09/01
Volume: 34, Issue: 5-6, Pages: 367-374
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Abstract

The reduction of high concentrations of gypsum up to 110 kg/m3 is investigated in a two stage immobilised cell bioreactor The first stage is mainly colonised by a consortium of acidogenic bacteria and sulphate reducing bacteria oxidising volatile fatty acids with more than 2 carbons mainly butyrate and propionate The gypsum consumption rate is rather high 11 kg/m3day Most of acetate remains unconverted in this first stage It is partially converted in the second stage residence time 12 days which is predominantly colonised by acetate oxidising bacteria The gypsum consumption rate is much lower than in the first stage 3 kg/m3day With both stages it is possible to reach an almost complete conversion of gypsum with an overall capacity of 61 kg gypsum/m3day We propose also a very simple model to describe the different transformation rates It allows us to clearly identify the activity levels of the different types of sulphate reducing bacteria in both stages

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  1. Volatile organic compounds (VOC) at some sewage treatment plants in Poland
  2. Detection of F+ bacteriophage in large volumes of water by a membrane filter method (MFM)
  3. Estimation of the fate of microbial water quality contaminants in a South African river
  4. Removal of PCR inhibiting substances in sewage sludge amended soil
  5. A newly isolated fungus participates in the corrosion of concrete sewer pipes
  6. Chemical perception and behavioral response of freshwater fish to 2-methylisoborneol
  7. Use of wastewater for crop production under arid and saline conditions: yield and hygienic quality of the crop and soil contaminations
  8. DAF treatment of a reservoir water supply: comparison with in-line direct filtration and control of organic matter
  9. Multiple interactions in riverine biofilms - surfactant adsorption, bacterial attachment and biodegradation
  10. Treatment of primary-settled urban sewage in pilot-scale vertical flow wetland filters: comparison of four emergent macrophyte species over a 12 month period
  11. Wastewater treatment by stabilization pond: Marrakesh experiment
  12. Methanogenic activity and performance of UASB, DSFF and USFF reactors
  13. Challenges for the development of advanced constructed wetlands technology
  14. Transition of a lake to turbid state six years after biomanipulation: mechanisms and pathways
  15. Nonlinear and set-point control of the dissolved oxygen concentration in an activated sludge process
  16. The influence of currents on circular secondary clarifier performance and design
  17. Evaluation of serratia marcescens bacteriophage as a tracer and a model for virus removal in waste stabilisation ponds
  18. Vulnerability to diffuse pollution and average nitrate contamination of european soils and groundwater
  19. Case studies on preliminary treatment facilities at marine outfalls
  20. Methods for studying dissolved oxygen levels in coastal and estuarine waters receiving combined sewer overflows
  21. The practical use of wastewater characterisation in design
  22. Efficacy of a combined system of copper and silver and free chlorine for inactivation of Naegleria fowleri amoebas in water
  23. On the modelling of the dynamic propagation of biological components in the secondary clarifier
  24. Application of experimental research methodology to the study of nitrification in mixed culture
  25. Preliminary uncertainty analysis – a prerequisite for assessing the predictive uncertainty of hydrologic models
  26. Evaluation of the WHO nematode egg guidelines for restricted and unrestricted irrigation
  27. Principles and applications of dissolved air flotation
  28. Complete anaerobic digestion of activated sludge by combining membrane separation and alkaline heat post-treatment
  29. Dynamic simulation of sludge blanket movements in a full-scale rectangular sedimentation basin
  30. Rational design of packed saturators
  31. Towards managing catchment water utilisation for the Lake St Lucia ecosystem
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