Abstract: | :In the pulp making processes, organic and mineral compounds are released in waste water discharged from different process stages. The paper shows the research carried out to set the types of pollutants specific to chemical and paper pulp making. The content in suspensions, CODCr, BOD5, pH, fixed residue and its content of organic substances, the content of sulphates, sulphites, ammonia nitrogen and chlorides were determined on process stages and values of pollution indices were calculated (kg pollutant/t pulp). In both production processes, the effluent with the highest load is from cooking-washing due to losses of waste liquors and non-recovery of lignosulphonic draff. |
