WCW Summer Crossword

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Across
  1. 3. the positive electrode of an electro dialysis cell
  2. 4. a grouping of membrane modules and a high pressure pump
  3. 5. a reduction in water mass transfer caused by materials in the water, often caused by silts or colloids
  4. 7. Activated Sludge the returned of settled material, the sludge, to the head of the aeration system to re-seed the new wastewater entering the tank sludge (R.A.S.).
  5. 9. Sludge The process involves air or oxygen being introduced into a mixture of screened, and primary treated sewage or industrial wastewater (wastewater) combined with organisms to develop a biological floc which reduces the organic content of the sewage
  6. 10. the process of reversing the flow of water either across or through a medium or a membrane
  7. 12. type of lagoon used where there is insufficient energy provided by the aeration equipment to keep the sludge in suspension and solids settle to the lagoon floor.
  8. 13. the negative electrode of an electro dialysis cell
  9. 14. a condition of unequal flow distribution in a filter bed
  10. 15. litre one million litres of water
  11. 18. The movement of water into and through a soil which can affect sewage collection systems.
  12. 21. the rate of water flow across the membrane surface area
  13. 22. a measure of the ability of a water to neutralize acids
  14. 24. the reference name of an arrangement of process treatment equipment & pumps in parallel to another identical set of the same equipment
  15. 25. silt density index
  16. 26. A holding and/or treatment pond to promote the biological treatment of wastewaters
  17. 27. destruction or removal of all viable organisms
  18. 28. an opening in a membrane or filter matrix
  19. 29. the step in the treatment process that removes grit and other solids through a screening process followed by a period of settlement
  20. 31. dissolved organic carbon
Down
  1. 1. temperature the temperature of the surroundings
  2. 2. a membrane element combined with the membrane element housing
  3. 5. influent or source water into a water treatment process
  4. 6. granular activated carbon
  5. 8. activated sludge Excess sludge removed from the treatment process (W.A.S) to keep the ratio of biomass to food supplied in the wastewater in balance, and is further treated by digestion prior to disposal.
  6. 10. Any class of microscopic single celled organisms that reproduce by fission or by spores. Often characterized by round, rod-like, spiral or filamentous bodies.
  7. 11. the process of removing dissolved gases from water
  8. 16. water confined in permeable sand layers between rock or clay
  9. 17. water treatment equipment that uses sodium based ion exchange resin principally to remove calcium and magnesium cations.
  10. 19. the dissection of a membrane element to investigate the causes for unsatisfactory performance.
  11. 20. clean in place
  12. 23. name of the index that is used to determine whether water is acidic or scale forming
  13. 30. liquor The combination of wastewater and biological mass.