Recycling of nutrients, waste and water in urban and peri-urban agriculture:
Date: 2013-03-05 07:57:31 User: Eshetu Bekele
Recycling of organic waste as compost is a sustainable approach : (i) for the use of the growing amount of agro-industrial by-products, (ii) to enhance the soil fertility and increase the food production, (iii) to reverse the impact of climate change by stabilizing soil organic matter and sequestering additional C in to the soil.

Measuring the respiration (CO2 release), biochemical chacterstics and the molecular composition of the composts and compost-soil-mixtures by pyrolysis-mass spectrometry reaveled Composting of organic waste led to an increased cation exchange capacity and of exchangeable macronutrient elements. specfically in a tropical Nitisol significantly increase in the concentration of the Ca is postively corrolated with the avilability of P in soil- compost mixtures. furtermore The data from the compost incubation experiments provide clear evidence that a short thermophilc compositing phase is sufficient to sanitize coffee pulp waste and/or fruit waste and to get the maximum C sequestration in soil.
- The broad application of this evidence in developing countries contributes to (i) solving an urgent waste disposal problem, (ii) increasing the SOM content with all related benefits, and (iii) recycling plant nutrients that were previously taken up from the soil. It may have considerable economic implications because the composting periods can be greatly reduced from 6 to 8 months to three weeks.
Date: 2013-03-05 09:54:48 User: Reagan Mudziwap
I totally agree with the above statements. I am currently marketing technology that can convert organic waste into fertiliser. This technology reduces the composting time from 6 months to 24 hours and it has been proven that it also sterilises the fertilisers. I am also working on conversion of organic waste into electricity and i think to a greater extent it is viable. Lastly i have tried recycling waste water using technologies native to Zimbabwe and the results are very encouraging.

You can contact me on
Date: 2013-03-05 19:30:37 User: anthony chika i
i will like participate, please how can i register ?
Date: 2013-03-08 12:32:18 User: Marielle Dubbel
Dear Chika. Since your are posting on the forum it seems that you are already registered?! If you are interested in participating in the Forum discussion please go to the SUPURBFOOD webpage on and create an account. You can then access the Forum page at: Marielle
Date: 2013-03-08 12:33:26 User: Marielle Dubbel
Dear Reagan
Thank you for your post. Please share more information on the technologies that you mention. We are specifically looking to hear from you on most successful business models and their marketing potential, what bussiness model and financial models are applied? Are the technologies promoted by an NGO? By a small or medium sized enterprise? To whom are the products sold (eg the compost or the electricity)? Is the bussiness making a profit or not? What were success factors or problems overcome? Where did you get the organic waste to compost? What was the role played by other actors like the government? Thank you, Marielle Dubbeling, RUAF
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