Comparison of coagulation efficiency of natural coagulants exracted from different rural species

This study is concerned with the coagulation activity of extracts of various rural species. The aim is to ascertain if rural varieties affect coagulation activity. Contents of dry matter and nitrogen are specified in solid samples, and the content of soluble nitrogen is determined in the extracts. These data are used to calculate the efficiency of extraction of nitrogen- containing compounds. The coagulation activity is assessed by jar test using synthetic turbid water, of the initial pH 9and turbidity 35 NTU. The increment of organic matter concentration after the coagulation is also determined.