Effect of thermal sludge processing on selected components of air quality in the vicinity of a wastewater treatment plant

Abstract

Wastewater treatment plants (WWTPs) generate considerable amounts of sewage sludge. The thermal sludge treatment system (TSTS) is therefore one of the most important technological units of a WWTP. However, due to technological processes involved in thermal sludge treatment, specific chemical, physical and biological conditions may arise that can affect air quality both within the WWTP area and in its vicinity. This study uses data from experimental measurements taken in and around a WWTP to assess the impact of thermal sludge treatment on air quality. The selected facility is located in the Group Sewage Treatment Plant in the Lodz Agglomeration and serves a population of around one million. The concentrations of harmful gaseous substances, bacteria, fungi, particulate matter and thermal energy were investigated. The qualitative and quantitative characteristics of physical, chemical, and biological factors and their influence on air quality are presented.

The investigation of type and concentration of bio-aerosols in the air of surgical rooms: A case study in Shariati hospital, Karaj

“…Also, the resistance of gram-positive bacteria is much higher than gram-negative bacteria. These bacteria can survive under adverse environmental conditions as well as closed environments [31,32]. The fungal genera found in the operating room include Cladosporium, Aspergillus, and Penicillium.…”

Average Hourly Concentrations of Air Contaminants in Selected Urban, Town, and Rural Sites

“…Studies on air pollution focus not only on inhabited areas (Cichowicz et al 2017; Cichowicz 2018; Pérez et al 2010) but also on agricultural and undeveloped areas, which are used as background measurements (Hagenbjörk et al 2017; Putaud et al 2004; Zheng et al 2010). In many countries, including in Europe, air quality assessments use measurements performed by automatic measuring stations (Agudelo-Castaneda and Teixeira 2014; Malley et al 2018; Wielgosiński et al 2018) and air quality modeling (Cichowicz and Stelegowski 2018a; Inness et al 2013; Menut et al 2012). Usually, the average annual, seasonal, and monthly concentrations of air pollutants are analyzed (Cichowicz et al 2017; Guerreiro et al 2010; Malley et al 2018).…”

Catalytic Cracking of Heavy Crude Oil over Iron-Based Catalyst Obtained from Galvanic Industry Wastes

“…Since galvanic sludge wastes are hazardous due to their chemical composition, they need final treatment or disposal in a safe landfill. Worldwide the implemented skills are mainly: disposal in 2 of 13 soils, thermal treatments as pyrolysis/incineration [8][9][10][11], encapsulation [12], as a component of other solid materials [3,7,[13][14][15]. Similarly, some techniques as inertization of heavy metals present in this type of sludge have been studied [2].…”