Microbiological Evaluation of the Effectiveness of Sewage Sludge Sanitization with Solar Drying Technology

Table 1

Applicable reference methods of municipal sewage sludge research [11].

Number	Parameter	Method
(1)	pH	Electrometric determination in water solution
(2)	Dry matter content	Drying at 105°C, weighing
(3)	Organic substance content	Roasting at 600°C, weighing
(4)	Total nitrogen content	Mineralization in acid pH with addition of catalyst
(5)	Ammonium nitrogen content	Distillation of ammonia and determination with spectrophotometric method
(6)	Total phosphorus content	Mineralization to phosphorus (V) and determination with spectrophotometry
(7)	Calcium and magnesium content	Mineralization with acid mixture and determination with atomic spectrometry
(8)	Heavy metal content: lead, cadmium, mercury,; nickel, zinc, copper and chromium	Atomic absorption spectroscopy after mineralization in aqua regia or concentrated acids