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Composting toilet and greywater practice workshop

Composting toilet and greywater practice workshop. WCOWMA 2016. Introductions. Ian Ralston ROWP Eng.L Ed Hoeppner ROWP. Workshop content. Overview Composting toilets Walk through of Manual standards Example sizing and selection Greywater systems Walk through of Manual standards

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Composting toilet and greywater practice workshop

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  1. Composting toilet and greywater practice workshop WCOWMA 2016

  2. Introductions • Ian Ralston ROWP Eng.L • Ed Hoeppner ROWP

  3. Workshop content • Overview • Composting toilets • Walk through of Manual standards • Example sizing and selection • Greywater systems • Walk through of Manual standards • Example sizing and selection • Example sizing of residual organic matter onsite burial

  4. Purpose of the Manual • Standards and guidelines • Filing approach For: • Non water borne waste management • Greywater systems • Seasonal diversion systems • Source separation systems

  5. Filing under the SSR • Composting toilet systems • On site burial of composting toilet residual organic matter • Greywater systems • Seasonal diversion systems for greywater sub surface irrigation

  6. Manual approach • Based on SPM, does not repeat SPM • Split to standards and guidelines • Separate rationale • Performance objectives • Appendices • EMPHASIS ON OPTIONS

  7. Manual layout • Part A Introduction • Part B Standards • Composting Toilets • Greywater systems • Part C Guidelines • Sections parallel Part B • Part D Appendices

  8. MCTGP Source separated waste systems

  9. Typical sanitary drainage and sewerage systems • Water closets for human waste • Plumbing fixtures • Combined sanitary drainage system • To onsite sewerage system • No intentional recycling of resources

  10. Composting toilets • Composting toilets for human waste • Urine diversion or leachate • Plumbing fixtures • Greywater • Intentional recycling of some resources

  11. MCTGP Composting toilets

  12. A composting toilet system

  13. B-1 Standard sections • Procedure • System purpose and objectives • System capacity • System selection • Specification and installation • Residual organic matter processing • Discharge of residual organic matter • Maintenance

  14. B-1.2 Procedure • Similar to SPM • Minimum steps for planning, filing, construction, final filing • Clarifies “DDF” • Uses SPM equivalent DDF to determine cut off for ROWP practice

  15. B-1.3 System purposes and objectives • Similar to SPM objectives for systems • Important to support alternative solution • System must meet primary purposes

  16. Primary purposes • Safely collect and contain human waste • Manage odors and prevent vector or human access during storage • Manage leachate and safely discharge leachate or diverted • Provide for safe and practical management of residual organic matter.

  17. Secondary objectives (e.g.) • Volume or mass reduction • Stabilization for transport • Stabilization and sanitizing for onsite “discharge”

  18. B-1.4 System capacity • Volume of excreta • Volume of bulking agents • Volume of leachate or diverted urine

  19. B-1.5 System selection • To meet the primary objectives • To meet the secondary objectives • Record rationale = how it meets

  20. B-1.6 Specification and installation • Page 30 • Similar to SPM II-6 standards tables • Some performance specifications • Several tables • Table B-3 (general) applies to all

  21. Table B-3

  22. Table B-3

  23. Table B-3

  24. B-1.7 Residual organic matter processing • Page 33, tables, application based on fate of residuals • Incineration • Curing • Sanitizing • pH adjustment • Urea and ammonia sanitizing

  25. Stages of composting

  26. Solvita • Test kit for measuring CO2 and Ammonia

  27. Solvita Test Jar

  28. Moisture and Temperature

  29. B-1.8 Discharge of residual organic matter • Page 37 • Off-site discharge • On-site burial • On-site surface discharge (professional), in guideline

  30. On-site burial • Processing standards • Quality standards • Monitoring standards • AP involvement • Intended to meet SPM performance standards

  31. Site and soil evaluation per SPM

  32. Consider maintenance plan and ROWP involvement

  33. B-1.9 Maintenance • Page 40 • Health and hygiene (handling) • Maintenance plan • Minimum maintenance standards table

  34. MCTGP Selecting and sizing a composting toilet system

  35. Stepwise procedure (Part B-1) • Define objectives: • Primary objectives • Determine discharge method • Site use and waste characterization • Site and soil evaluation (if needed) • System selection, specification, size • Discharge and maintenance • Documentation

  36. Example system • 2 bedroom house, 100 sqm floor area • 3 occupants • Owner objectives defined

  37. Define Objectives (page 28)

  38. Primary purposes • Safely collect and contain human waste • Manage odors and prevent vector or human access during storage • Manage leachate and safely discharge leachate or diverted urine • Provide for safe and practical management of residual organic matter.

  39. Secondary objectives • Diversion of urine for fertigation use • Stabilization and sanitizing for On site burial

  40. Discharge • Determine discharge method • Leads to requirements for system and process

  41. Characterize Wastes • SPM equivalent DDF (from SPM) • 1000 L/day • System capacity (page 29)

  42. B-1.4 System capacity • Volume of excreta • Volume of bulking agents • Volume of leachate or diverted urine

  43. Bulking agent • Minimal for urine diverting system • Urine diversion efficiency (C-1.4.2.2) • Other systems, C-1.4.4 (page 57):

  44. To Worksheet

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