Wastewater sludge disposal in the claydite construction product

Abstract

In environmental concern this paper relates to waste management, that is becoming a global challenge. The raw base municipal wastewater sludge (WSS) is submitted by crude types: excess activated sludge (EAS), deposit allocated precipitation at mechanical treatment stage, or also dehydrated mixture of the listed kinds of deposits. Claydite is an effective and rather popular material in the construction industry. The choice of sub-standard clay raw material of an overburden bench of Kalinovo- Dashkovskiy deposit, closely to the city of Serpukhov is provided by a location of opencast on close distance from wastewater treatment plant. As the additive to the specified raw material was chosen small-dispersed WWS with sludge from surface storm drains (SSD), which is poorly investigated. This allowed to specified traditional technology and to improve production light porous claydite, ecologically pure product. Claydite application is possible in production of light concrete on porous aggregate (filler) of the marks up to 600-700 with reduced thermal conductivity up to 0.175 W/m°C. Such a claydite-concrete manages to be received specially working with granulometry of aggregate, utilizing claydite-sand or wastage of dust-ablation. The design for real conditions with productivity 135 thousand M3/year showed the economical substantiation of mentioned claydite production based the identification of power reduction on 25.8% and specific fuel reduction on 25.7 – 38.0% in comparison with traditional values of claydite production.