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On-site waste water treatment in Sydingosby

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  1. Abstract.
  2. Introduction.
  3. Description of the curent one site treatment.
    1. The different buildings.
    2. The current one-site system.
    3. The one-site system problem.
    4. Calculations of the amount and composition of the different fractions of the organic waste and wastewater generated.
  4. Urine diversion system and open sand filter.
    1. The urine diversion system.
    2. The whole system.
  5. Conclusion.
  6. References.

The project site is a farm located in Sydingösby. The Gunnarsson family is living here. Carina and Stefan have two children. Stefan works at the farm while Carina works at SLU. This site has already a system for waste treatment, but it is not satisfying and not sustainable. Actually it does not permit a good reduction of BOD, nitrogen or phosphorus coming from the waste, and does not offer good recycling of the nutrients. Moreover the family has planned to build a guest apartment, and need to install toilets in the honey room. Thus maybe some of the existing parts of the current one-site system need to be re-dimensioned. And a new system has to be installed to fulfill the aims of BOD, N and P removal. In the first part we are going to describe the site, the current one-site system and the problems which occur. Then we are going to analyze in three other parts three possibilities to improve the waste treatment: the urine diversion, the composting, and the sand filter. We will after that conclude with the system seems to be, according to us, the best choice.

[...] Which means that the installation of the WME-DS toilet reduces the blackwater by 5 times (currently equal to 136865 So we have in average 75 L of black water produced each day. When the guest house will be rent the maximal consumption will be 5*10+5*10= 100 L/day. Concerning the greywater, as we have calculated previously, it is about 273.8 m3 per year. So in average 0.75 m3 are produced each day with a maximum reach during the rent of the guest room equal to 1 m3 per day if 100 L are used per person per day. [...]

[...] The water economy will be more than 50% Finally two WME-DS will be installed in the first and second flour of the house. The guest room will be also equipped with the same toilet model. Concerning the Honey annexe a conventional toilet should be used, we think to reuse the current toilet of the residential house. Figure The Wost Man Ecology toilet The pipe system Some considerations have to be taken in account. First of all metal pipe are prohibited for such installation because of the high corrosive potential of the urine. [...]

[...] DESCRIPTION OF THE CURRENT ONE-SITE TREATMENT 3 I The different buildings 3 I The current one-site system 3 I The one-site system problem 4 I Calculations of the amount and composition of the different fractions of the organic waste and wastewater generated 4 II. URINE DIVERSION SYSTEM AND OPEN SAND FILTER 4 II The urine diversion system 5 II The whole system 10 II Conclusion 11 II References 11 III. THE COMPOSTING SOLUTION 11 III Urine diversion with dry-toilets 11 III The composting itself 12 III The treatment of the other waste 13 IV. [...]

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