Concept of using small capacity sewage treatment plants and/or homestead adjacent waste water treatment units, working in a closed cycle process, as a way of using domestic sewage and other organic wastes as a fertilizer for growing plants
1996
Kurhanski, M. (Instytut Wlokien Naturalnych, Poznan (Poland))
Between the years 1982-94 a series of field and lysimeter experiment on the utilization of domestic sewage in a closed-cycle-process were carried out. The results of many years long experimental underground irrigation using a four steps sewage treatment plant, along with small single doses (of up to 10 mm) and annual doses of up to 600 mm was that a complete purification of waste water was achieved. The process included the following steps: mechanical cleaning, biological treatment, plant metabolism, composting of solid wastes. During the entire experiment with underground irrigation a 100 percent purification of sewage was obtained (without effluent). A very intensive plant growth with a high evapotranspiration coefficient was observed
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