What method of sewage treatment is better for gardening communities?

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Ecocentrum Ltd and Friends of the Baltic public organization together with active gardeners continue to study and discuss the effectiveness of different types of wastewater treatment facilities for individual houses in non-canalized areas.

On October 7, in Fauna gardening community of the Lomonosov District, a meeting with a specialist in servicing of local treatment facilities  was held.

Unlike simple septic tanks, where wastewater cleaning is carried out only due to sludge and additional filtration through the sand-gravel mixture, structures using aeration give a higher degree of cleaning (80-90% instead 50-60% in septic tanks). But in terms of eco-efficiency, dry compost toilet  is a champion, since not a single drop of toilet waste falls into natural waters, but is processed into fertilizers.

/sites/default/files/inline/images/%D0%A2%D1%83%D0%B0%D0%BB%D0%B5%D1%82%20%D1%82%D0%B5%D0%BA%D1%83%D1%89%D0%B5%D0%B5%20%D1%81%D0%BE%D1%81%D1%82%D0%BE%D1%8F%D0%BD%D0%B8%D0%B5.jpgIt is estimated that in the Leningrad region there are 3.5 thousand gardening communuties and more than 2 million gardeners. In the three summer months they produce more than 2,300 tons of nitrogen, 300 tons of phosphorus and more than 700 tons of potassium. In the absence of quality cleaning, toilet waste pollutes the soil, groundwater and surface water, contributing to the eutrophication of water bodies and the deterioration of the quality of drinking water in wells and boreholes.

In the Fauna gardening community, the dry toilet is already in operation for the second warm season, located on the gardening site and accessible to gardening board visitors. Over the entire period of operation, three buckets (84 liters) of solid waste were kept from entering the soil, which were placed in a specially installed composter for further conversion into fertilizer. For the season-2018, 11 cans (220 liters) of urine were collected. After a six-month aging in a closed canister, neutralized urine is used for irrigating nitrogen-loving crops.

A dry toilet and a composter are parts of a demonstration complex designed to inform visitors about the operation of a dry toilet and the importance of wastewater treatment.

 

 

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