THE RESEARCH OF WASTEWATER IMPACT ON CONCRETE STRUCTURES IN THE SEWERAGE SYSTEM OF A PHARMACEUTICAL ENTERPRISE
DOI:
https://doi.org/10.15421/jchemtech.v34i1.336046Keywords:
pharmaceutical wastewater; chemical corrosion of concrete; sewage; ecology; filtration.Abstract
The relevance of the study is to determine the chemical composition of wastewater and its impact on the technical condition of the sewage system. Aim. The aim of the work was to investigate the chemical composition of wastewater and its effect on reinforced concrete structures of the sewage system. Methods. X-ray diffractometric, colorimetric, fluorimetric, gravimetric, titrimetric. Results. The study of the chemical composition of wastewater showed a shift in pH to the alkaline side, the suspension of dry substances in water was above the norm in the fourth sample by 5.3 %, in the fifth – by 36.3 %; the dry residue in the first sample by 31.3 %, in the second – by 20.2 %, in the third – by 13.9 %, in the fourth – by 9.3 % and in the fifth – by 27.4 %. The content of ammonium nitrogen was higher in the fourth experimental sample by 52.3 %, and in the fifth by 54.1 %. The level of nitrite ions in the first sample was higher by 9.1 %, in the second by 6.0 %, in the third and fifth by 42.4 %, and in the fourth by 36.4 %; the increase in nitrate ions in the first sample was by 11.1 %, in the second by 21.6 %, in the third by 16.0 %, in the fourth by 19.5 %, and in the fifth by 22.4 %. Conclusions. The implemented measures to reduce wastewater pollution were effective and reduced the load on concrete sewage structures. The scientific novelty of the results obtained lies in the field study of wastewater from a settling well of a pharmaceutical enterprise before and after preventive measures.
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