REDUCTION OF THE LEVEL OF TECHNOGENIC HAZARD NEGATIVE EFFECT OF SEDIMENTS OF URBAN WASTE WATER ON THE ENVIRONMENT WITH HUMIC SUBSTANCES
Dushkin Stanislav
National University of Civil Defence of Ukraine, Kharkiv, Ukraine
https://orcid.org/0000-0002-9345-9632
DOI: 10.52363/2522-1892.2021.2.11
Keywords: technogenic safety, sewage sludge, humic substances, carbon-alkali reagent, peat, heavy metals, ultrasound, flocculant
Abstract
The article discusses the issues of reducing the level of technogenic safety of the negative impact of urban wastewater sludge on the environment by removing heavy metals using humic substances.
It is noted that the technogenic and ecological problem requires an urgent solution through the formation of new effective methods of treatment (neutralization and dehydration) and further disposal of urban wastewater sludge. Silt sites are a source of pollution of soil, groundwater and surface water object and air.
A new method for removing heavy metals from municipal wastewater sludge using humic substances has been developed. It was found that humic substances have a sorption capacity in relation to heavy metals. As a reagent for removing heavy metals from urban wastewater sludge, it is proposed to use the product of processing lignite and peat with alkali using a carbon-alkali reagent, which makes it possible to reduce the concentration of heavy metals to such concentrations that the sludge can be used as fertilizer in agriculture.
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