LITBK is accredited to testing of different characteristics of samples from sludge from urban and industrial wastewater treatment plants - sewage sludge;

LITBK performs testing of sewage sludge characteristics in accordance with the requirements of the Ordinance on the order and manner of utilization of sludge from wastewater treatment through their use in agriculture and the Ordinance on separate collection of bio-waste and treatment of biodegradable waste.

LITBK performs testing for characterization of sewage sludge as a fuel.

The test results are presented in a Test Report. If requested, test reports may include opinions and interpretations on how the results are used or recommendations for improving product results, as well as declaring conformity in accordance with the requirements of the applicable regulations.



Test method


Dry matter content

БДС EN 15934:2012, А

Water content

БДС EN 15934:2012, А

pH (H2O)

БДС EN 15933:2012

pH (CaCl2)

БДС EN 15933:2012

Specific electrical conductivity

СД CEN/TS 15937:2012

Total organic carbon content (ТОС)

БДС EN 15936:2012, т.10

Loss of ignition

БДС EN 15935:2012

Total nitrogen content

БДС EN 16168:2012

Soluble forms of nitrate nitrogen

БДС EN ISO 10304-1:2009

Soluble forms of ammonium nitrogen

БДС ISO 7150-1:2002


СД CEN/TS 16202:2013

Extractable forms of elements - Al, Sb, As, Ba, Be, Bi, B,V, Fe,

Hg,Cd, K/K2O, Ca/CaO, Co, Li, Mg/MgO, Mn, Cu, Mo,

Na, Ni, Pb, Se, Si, Ag, Sr, S, Tl, Ti, P/P2O5, Cr, Zn

БДС EN 16170:2016

Exchangeablephosphorus content

БДС ISO 11263:2002

Exchangeablepotassium, calcium and magnesium content

БДС ISO 11260:2018

Water soluble sulfates

БДС EN ISO 10304-1:2009

Moisture content

БДС EN ISO 18134-2:2017


Calorific value

БДС EN ISO 18125:2017


Ash content

БДС EN ISO 18122:2015


Total carbon, hydrogen, nitrogen content

БДС EN ISO 16948:2015


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