Dissertation > Excellent graduate degree dissertation topics show

Study on the Treatment of Wastewater from Sulfur Chemicals by Using Waste Stone Powder and Utilization of Its By-product

Author: ZhouChuanFu
Tutor: SuDaGen
School: South China University of Technology
Course: Materials Science
Keywords: marble polishing powder by-product gypsum cement retarder sulfur chemicals wastewater
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 72
Quote: 0
Read: Download Dissertation

Abstract


The new two stages treatment processing technology of sulfur chemicals wastewater by using marble polishing powder and lime, and the effect of the properties of by-product gypsum from the processing as the retarder of cement were studied in the paper by XRD and SEM. The results showed that:(1) The marble polishing powder which mainly contained calcium carbonate could partly replace the lime to neutrailize the wastewater of sulfur chemicals. In the processing of treatment of wastewater of sulfur chemicals by using the new two stages technology of marble polishing powder and lime, the pH value of water processed by the marble polishing powder in the first stage should be control at 4.8-5.5 was better; when the pH value of water neutrailized by the lime in the second stage was at 8.3-8.5, the contain of Fe2+ in the wastewater was very low, and the COD and the colority of the blow-down water could preferably come up to the standard.(2)The setting time of cement mixed–in by- product gypsum as retarder was close to those of the cement mixed–in dihydrate gypsum and the cement mixed–in by-product gypsum & dihydrate gypsum as retarder, because their SO3 dissolution rate in the CaO solution were close.(3)The strength of ordinary Portland cement mixed–in by-product gypsum as retarder was higher than that of the ordinary Portland cement mixed–in dihydrate gypsum as retarder, because the calcium carbonate in the by-product gypsum would participate in the hydration reaction and formed the calcium aluminum oxide carbonate hydrate, which was helpful to improve the cement strength during the cement hydrated reaction. And the strength of ordinary Portland cement mixed–in by-product gypsum & dihydrate gypsum as retarder was slightly higher than that of the ordinary Portland cement mixed–in dihydrate gypsum as retarder.(4)The saturation dosage point of MII naphthalene-type water reducing agent of cement mixed–in by-product gypsum was higher than that of the cement mixed–in dihydrate gypsum, the 5min Marsh time and 60min Marsh time were longer. The compatibility between cement mixed–in by-product gypsum & dihydrate gypsum and MII naphthalene-type water reducing agent was better than that of cement mixed–in by-product gypsum. Considering the setting time, the strength and the compatibility of MII naphthalene-type water reducing agent, the properties of the cement were better when we mixed by-product gypsum & dihydrate gypsum as cement retarder.The way of using the marble polishing powder as one of the material to neutrailize acidic wastewater of sulfur chemicals and using the by-product gypsum as the retarder of cement can save the resource and reduce the waste, and forms the regional distinctive the stone industry, sulfur chemicals industry and the cement industry circular economy industry chain.

Related Dissertations

  1. Studies on the Synthesis and Technology of Dipentaerythritol and Its Derivative,TQ223.164
  2. Study of the Treatment of Printing and Dyeing Wastewater Using a Pilot-scale Combined Process of Multi-stage Anaerobic Phases and Cross Flow Aerobic Sludge Reactor,X791
  3. Modification and Application of the Waste Fluorgypsum and the Treating of High Concentrations Fluoride Wastewater,X703
  4. Study on the Treatment of Coke Wastewater with Iron/Carbon/Fenton-biological Combination Processing,X784
  5. Preparation of One-dimensional Nano TiO2 and Study on the Decolorization of Dyeing Wastewater,TB383.1
  6. Selection and Optimization of Control Technics in CODCr and Colority of the Refined Cotton Wastewater Treatment Process in a Refined Cotton Enterprise in Rudong, Jiangsu Province,X791
  7. Experimental Study of Improved UASB Reactor Treatment of Organic Wastewater,X703
  8. Research on the Efficiency of Circle-Flow Constructed Wetland Process for Swine Wastewater Treatment and Zeolite Regeneration,X713
  9. The Effect and Influence Factors of Novel Loop Membrane Bioreactor for Treating the Cephalosporin Intermediate Wastewater,X787
  10. Treatment of Tannery Wastewater by Combined Process of Two-stage H/O and Ecological Pond: Study and Practice,X794
  11. Study on Advanced Oxidation Technology of Ozonation for Berberine Pharmaceutical Wastewater Treatment,X787
  12. Study on the Resource Utilization and Adsorbability of Silica Fume,X703
  13. Treatment of Rural Domestic Wastewater by Aerated Constructed Wetland,X703
  14. Research on the Modified Methods of Fly Ash for Ammonia-nitrogen Wastewater Treatment,X703
  15. Coking wastewater on various stages of processing and toxicity of corn embryo,X173;S513
  16. Corncob modified flocculant preparation and application of,X703.5
  17. Design of Intelligent Supervisory Control System for Wastewater Treatment,TP277
  18. Iron-based flocculant preparation and application of research,X703.5
  19. Study on Removal Characteristics of Dissolved Organic Matters from Bio-treated Effluent of Dye Wastewater by Activited Carbon Adsorption,X791
  20. Study on Treatment of Dye Wastewater by Combined Process Using Micro-Electrolysis and Fenton Oxidation of the Reaction Mechanism,X791
  21. Transformation and Implementation on Chemical Wastewater Treatment Control System,TP273.5

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
© 2012 www.DissertationTopic.Net  Mobile