Recent Changes

Thursday, May 3

  1. page Wastewater edited New! Report from July 2017 sludge technology workshop {Final Report - WASTE DISPOSAL IN EMERGENC…
    Report from July 2017 sludge technology workshop

    Results from the research on Vermicomposting
    {Sourcing of Worms for Large Scale Vermicomposting.pdf}
    Testing effectiveness worm and terra preta toilet, June 2014
    to India.
    The results of the first phase of the worm research trial, a questionnaire sent to various worm suppliers in South Africa, indicate that the South African worm industry has the capacity to supply over 3,000 kg per month or over 36,000 kg of live worms per year. Allowing for the number of non-responses to the questionnaire it is thought that this figure could be significantly higher and potentially double these figures.
    The current monthly supply of worms has the potential to process the faecal sludge from an average sized humanitarian camp (population of 11,400). Three thousand kg of worms have the ability to process the faecal waste from 15,000 people daily, around 4 tonnes per day. Through the companies’ projections it can be seen that there is the potential to increase production to over 11,000 kg of worms per month or over 132,000 kg per year. This could support processing of around 15 tonnes of faecal waste per day. Furthermore the worms processing the waste would multiply, in ideal condition their mass could double approximately every 60 days; these worms could be harvested and used in other camps. Another option would be to establish an independent worm farm for these systems. From these results it can be concluded that the South African worm industry currently has the capacity to supply worms for humanitarian settings and this capacity could be quickly increased to meet larger demands.
    {Bioadditive.jpg} .
    Testing bio-additives in Malawi
    aqueous solution.
    Unfortunately, preliminary results of the Co-Lice have not shown any impact of sludge volume. Trials for the NVH cocktail began in late August 2014. Results on solids and pathogen removal were not as high as expected. It is probably that tampering with the materials during transport and customs clearance may have resulted in reduced performance. The IFRC is currently planning new trials of the NVH septic tank and ‘cocktail’ in 2015.
    The IFRC has utilized small scale water treatment units for decades. While the units are often expensive and complicated to operate, they are able to produce water of high quality and can be dispatched and set up very quickly. Package wastewater treatment plants like those used in military outposts are far less common and much higher in price and complex than considered feasible for the humanitarian context. Furthermore, it was assumed that package units would receive more research and development interest and funding from other sources and that the ESP’s resources were better spent on mass scale, simple designs. However, when a known supplier of water treatment plants approached the IFRC with a design for a package heat treatment unit for faecal sludge which was designed and priced for the humanitarian context it was hoped that it might be possible to serve both mass and specialized contexts.
    The development of the Hygienizer was much slower than previously hoped. Expectations that it might be used to treat human waste in Ebola treatment centres were unmet due to severe production delays.
    human waste.
    William Carter
    Senior Officer, Water, Sanitation and Emergency Health Unit (WatSan/EH)
    (view changes)
    12:30 am

Monday, June 19

  1. page Waste Treatment Workshop edited Workshop information: Background documents {ESP Final Project Report June 2015 v2 (1) (1).pdf} …
    Workshop information:
    Background documents
    {ESP Final Project Report June 2015 v2 (1) (1).pdf}
    {AQA Hygieniser Field report March 2016 v2 DRAFT.PDF}
    {140408 Namisu Flexigester Transportation and Installation Report #1.pdf}
    {Vermicomposting for Sludge Treatment (1).pdf}
    {IFRC Waste Transfer Tank Prototype Erection Guide.pdf}

    (view changes)
    7:38 am

Monday, February 27

  1. page Non Stick Latrine Slab edited ... Ideally, the surface of a latrine slab should be made in such a way that faeces does not 'stic…
    Ideally, the surface of a latrine slab should be made in such a way that faeces does not 'stick' to it. That would reduce the volume of water needed for cleaning the slab. This 'non-sticky material could be applied as a special coating.
    § ResearchResearch the feasibility
    Activities undertaken
    A desk survey of existing films and coatings has been carried out along with an assessment of the possibilities to apply the films/coatings to latrine slabs including raised latrine.
    A non-sticky coating would be a good alternative since coatings can be applied later on, even when the latrine slab is at location in the field. Besides, a coating can also apply on other relevant parts, not only for the slab. These coatings are promising according to the suppliers (easy to apply, durable, etc.) however this should be tested since these are subjective sources. Testing is an elaborate and costly affair and currently outside the financial means of ESP. We advise to follow the results of the different researches done by K.K. Nag and by in the framework of the Bill and Melinda Gates Foundation (BMFG) ‘Reinvent the toilet challenge’.
    K.K. Nag research. K.K. Nag is the producer of the Nag Magic slab. They have ordered ‘ultra ever dry’ to test out. See:
    the findings.
    Non-sticky sprays from several different companies were found in a market research: WaterBeader, NeverWet, Hydrobead & Ultratech.
    Tell us your idea!
    products or ideas or would like to become involved in the 'non-sticky' coating projectideas, please get
    Jan Spit, Adviser Sanitation
    WASTE advisers on urban environment and development
    tel: + 31 182 52 26 25
    mob: +31 6 57 99 78 74
    (view changes)
    7:18 am