Open AccessDishwashing detergents and their effects on respiration inhibition of activated sludge
Author(s) -
Vendula Klimantová,
Helena Raclavská,
Jana Bouchalova
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/444/1/012026
Subject(s) - sewerage , activated sludge , environmental science , sewage treatment , microorganism , wastewater , waste management , chemistry , environmental chemistry , pulp and paper industry , environmental engineering , biology , engineering , bacteria , genetics
Nowadays, many households in the Czech Republic have a dishwasher. Their use releases the remnants of the dishwashing detergents used therein into the sewerage network. These substances affect the activity and also the lifetime of microorganisms in wastewater treatment plants (WWTP). Research is focused on respiration inhibition of microorganisms contained in activation sludge from WWTP and their affected by dishwashing detergents. In view of Regulation No 259/2012 of the European Parliament and of the Council concerning the limitation of the total phosphorus content of dishwashing detergents (into force on 1 January 2017), there have been significant changes in the structure of these detergents. The article describes the effect of selected dishwashing detergents on respiratory inhibition of activation sludge from a large municipal WWTP Ostrava and a small municipal WWTP Michálkovice. Both of these WWTPs are owned by OVAK (Ostrava waterworks and sewerage). Subsequently, the research is focused on the comparison of obtained results. The highest variation in values were measured for sample 3, where the inhibition measured when testing a sludge from a large WWTP differed by up to 60% from that measured when testing a sludge from a small WWTP. The research also evaluates possible causes of respiration inhibition of microorganisms when testing specific sample solution.