METHOD FOR PREPARING A SLURRY SAMPLE FOR ONLINE DETECTION OF ONE OR MORE NUTRIENTS AND A SLURRY TANKER OR TANK TRAILER WITH A SLURRY SAMPLING AND ONLINE NUTRIENT DETECTION SYSTEM

摘要

A method and system for preparing a slurry sample for online detection of one or more nutrients, in particular the content of ammonium N, total nitrogen (N), total phosphorus (P) and/or potassium (K) in a slurry contained in a tank (1) of a slurry tanker or tank trailer. The sampling and nutrient detection system comprises a slurry sample preparation and detection loop comprising a first sample preparation loop (2) with one or more pumps (3) for pumping slurry through the sample preparation loop (2) and a macerator (3) arranged in the sample preparation loop, e.g. integrated into the pump (3) for cutting or grinding particulates contained in the slurry. One or more means (4, 11) for diverting a sub flow of the macerated sample flow from the sample loop preparation (2) to the sensor loop (6). The sensor loop (6) comprises an inline nuclear magnetic resonance (NMR) sensor (7) for detecting the content of ammonium –nitrogen (N), total (Nitrogen) N, total phosphorous (P) and/or potassium (K) in slurry present in a slurry tanker or a truck tanker.