The purpose of the study was to evaluate which method for emptying of septic tanks that contributed with the lowest particle content in outgoing water during the period of a year. The methods for emptying in the comparison was mobile dewatering using polymer, complete pump-out and mobile dewatering using mechanic separation. Within the study, wastewater was sampled from septic tanks third compartment, however, only from septic tanks that were dewatered using polymer. Samples were taken one time before emptying followed by five occasions after emptying. The results from those samples were compared to previously existing results from complete pump-out and mobile dewatering using mechanic separation. Due to differences in method for sampling, the comparison in the discussion was limited to; samples taken before emptying and two weeks after emptying from septic tanks that had been completely pumped-out and dewatered using mechanic separation. The samples taken before emptying showed the particle content after using the septic tanks for a year since the previous emptying. Based on those samples there were no significant difference between mobile dewatering using polymer and complete pump-out or between mobile dewatering using polymer and mobile dewatering using mechanic separation. Two weeks after emptying the lowest particle contents were found in septic tanks that had been completely pumped-out followed by the two dewatering methods.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:umu-149997 |
| Date | January 2018 |
| Creators | Ramström, Emma |
| Publisher | Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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