The nitrogen and phosphorus supply in a lowland rain forest with a nutrient-rich soil was investigated by means of the leaf N/P quotient. It was hypothesised a high N and P supply to the forest ecosystem with a N and P rich soil. Total N and extractable P were determined in the surface (10 cm) soil of three plots of the forest. Total N was analysed by the Kjeldahl method, and P was extracted wi...

Conventional wastewater treatment processes are challenged by the need to effectively reduce pollutant loads before disposal or reuse, as composition and concentration of contaminants in brewery change with time. This results variation oxidation-reduction potential (ORP) affluent. Hence, current study is aimed at application ORP a real-time tool monitor quality. Other physicochemical parameters...

The publications on Kjeldahl’s method for determining nitrogen that have appeared since Kjeldahl’s (1) original paper in 1883 perhaps outnumber those on any other analytical method in the same period of time.1 The diversity of papers is attributable to the immense usefulness of the method, to its need for modifications for applications to various types of organic and inorganic compounds, and to...

Constructed wetlands are gaining increased attention for treatment of nonpoint sources of water pollution. Although constructed wetlands have been utilized for wastewater treatment in warm climates, their performance in cold climates has been questioned. A surface-flow wetland, designed to treat 2.65 m super(3) d super(-1) of milkhouse wastewater, was constructed on the University of Connecticu...

The established Kjeldahl technique for estimating nitrogen (King and Wooton, 1956) was employed using a Markham still and standardized sulphuric acid and sodium hydroxide with phenolpthalein as indicator. Urinary nitrogen was estimated on 1 ml aliquots. For faeces and food 10-20 g aliquots of homogenate previously prepared with a Silverson mixer were weighed and digested on the macro scale. The...