The introduction of chemical contaminants present in theeffluent pulp and paper industry and reviews the methodsdetermine the extent of the degree of pollution of organiccompounds

In addition to lignin and its compounds, Wood extractives such as tannins, fatty acids, aromatic acids, terpenes and plant gums With the creation of the suspended organic matter, coloring and inorganic solids, in paper pulp production processes also play a major role in establishing biochemical contamination. These pollutants are mainly polar, hydrophobic, negatively ionic charged , high molecular weight and are containing functional groups, hydroxyl, carboxyl attached to the aromatic rings, alkenes bonds, organic- metal complexes, radicals free and quinonic buildings. The major pollutants in the water supplies of the paper industry originate of two important chlorinated compounds based on bleached processes unsaturated resin acids in pulp . Different measures designed to detect and measure the amount of organic pollutants in aqueous ,that the most important parameters is DO1 ،BOD2 ، COD3 ، TOD4 and TOC5Values obtained for the COD was between 5000 to 6000 that is representing highly concentrated wastewater and contaminated. The COD(total organic compounds in sewage) Most of the BOD is an indicator of biodegradation organic matter . So the ratio COD / BOD can beused as a criterion be considered for the biological degradation of the aquatic environment . Whatever this ratio is closer to 1,destructionof biological compounds was more and Fewer toxic effects may lead to . COD test for most organic compounds have shown goodagreement with the values of the TOD, However, the BOD value indicate lower values almost always . The reason for this is the lack of complete oxidation aqueous biological . Also comparison BOD data with TOC does not appropriate based on the equations and BOD5/TOC rate is always between 1/2 and 2 are variable

Keywords:

Paper industries , industrial effluents , lignin , chlorinated compounds , resin acids , BOD , COD , TOD