The ISO 11261 standard, published by the International Standards Organization (ISO), provides a method for determining the total nitrogen (ammonium-N, nitrate-N, nitrite-N, and organic N) content of a soil. Nitrogen in NN-bonds and NO-bonds is only partially determined. This standard applies to all types of soil.
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In our country, this standard has been published by the Turkish Standards Institute (TSE) with the following title: TS 8337 ISO 11261 Soil quality - Total nitrogen determination - Improved Kjeldahl method.
While treatment sludge is applied to the fields, sludge is accepted as an organic source containing plant nutrients. Nitrogen and phosphorus content of sludges is very valuable in terms of agriculture when comparing farm manures with treated sludge. On the other hand, the potassium value is quite low. It has been observed that the content of elements such as nitrogen, phosphorus, potassium, calcium, iron and zinc of the cultivated plants increased with the treatment sludge applied to the soil.
Depending on the activities of the facility that produces the sewage sludge, it may contain substances such as organic compounds, acids, alkalis, metal salts, phenols, oxidizers, sulfates, hydrocarbons, oils, organophosphorus, and nitrogen.
In the test, analysis, measurement and evaluation studies carried out in our organization, national and international standards and applicable legal regulations are complied with and reliable and impartial results are obtained. These studies are based on the latest technological equipment, trained and experienced staff and modern methods. Among the numerous tests carried out in this context, there are also treatment sludge nitrogen determination services (TS 8337 ISO 11261).
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