Activated sludge method dominates among the currently used biological wastewater treatment systems. The dynamic development of this technology implies need for research, most of which are carried out in laboratory conditions. Biolog system seems to be an effective tool that allows a quick assessment of microbial activity of activated sludge. The aim of this study was to verify Biolog® EcoPlates’ usage for comparing the functional and metabolic diversity of activated and excess sludge
Architecture, Civil Engineering, Environment , ISSUE 1, 119–126
The problem of a proper water management is not only the decreasing water resources in the world, the consumption of which exceeds possibilities of their renewal, but also deteriorating water quality to the extent preventing from natural self-cleaning processes. Due tothe above, it is extremely important to protect water resources, that are treated wastewater receivers. Removal of microorganisms found in sewage and sewage sludge is a significant problem of the 21st century.
Architecture, Civil Engineering, Environment , ISSUE 2, 57–63
The paper presents the evaluation of the possibility of the use of a biomass with high moisture content in a cogeneration plant with gas piston engine. The dried sewage sludge-derived syngas is used as a fuel. Sewage sludge are characterized by about 70 wt% of moisture content after the dewatering process. The drying process which is applied as the next step requires great amount of energy. For this reason the thermal integration of the drying process with a piston engine which produce a
Architecture, Civil Engineering, Environment , ISSUE 3, 147–152
During pregnancy, gallbladder disease is often due to gallstones and biliary sludge(1). Although gallbladder disease also occurs in men, a higher prevalence has been reported in women(2,3). Hossain et al.(4) reported that gall bladder diseases are four times more common in women than men. Likewise, Eze et al. reported a male-to-female ratio of 2.8:1 in the prevalence of these diseases(2). This gender predilection constitutes a risk during pregnancy, and it has been found that gall
Bukunmi Michael Idowu,
Stephen Olaoluwa Onigbinde,
Isaiah Uzezi Ebie,
Michael Temidayo Adeyemi
Journal of Ultrasonography , ISSUE 79, 269–275
Activated sludge system is the essential technology in use for municipal wastewater treatment plant. The system design for pollutants removal, safety analysis and experimentation relied upon an effective, straightforward and reliable model. However, most of the available models are too complex to use for control purposes either practically or via simulation. Therefore, vehement need for a simplistic and efficient model could not be avoided. This paper presents a simplified model structure for
N. A. Wahab,
Y. M. Sam,
International Journal on Smart Sensing and Intelligent Systems , ISSUE 3, 1167–1179
The use of low-calorific value gases is a way to gaseous fuels supply diversification. LCV gases present an application potential in various technologies e.g. reburning process. The experimental investigation of the reburning process in small scale coal-fired boiler using sewage sludge-derived syngas was carried out. The influence of the LCV gas stream on the nitrogen oxides emission reduction was analyzed. The emission reduction reached almost 30% with 11% gas share in thermal input.
Architecture, Civil Engineering, Environment , ISSUE 1, 127–132
Basing on the data provided by the Central Statistical Office, in 2016 the length of the sewerage network in Poland exceeded 154 thousand kilometers, with the number of connections to buildings being approx. 3.2 million. The volume of sewage discharged from households in 2016 amounted to 938.1 hm3. The generated municipal sewage is subjected to treatment processes in over three thousand treatment plants, of which 106 produce biogas from the fermentation of sewage sludge [1
Architecture, Civil Engineering, Environment , ISSUE 2, 131–140
popular processes in biological treatments are aerobic and anaerobic, they use microorganisms as a tool to treat organic industrial wastewater [5; 6]. Although both processes are necessaries in most complete wastewater treating system, anaerobic processprevail due to its advantages over aerobic:it requires no oxygen has a high load Chemical Oxygen Demand (COD), and minimizes sludge production Many types of industrial wastewater treatment systems could not operate well with the absence of anaerobic
Architecture, Civil Engineering, Environment , ISSUE 3, 145–151
generate heat and electricity, biogas should be cleaned. H2S is a colourless, flammable, malodorous and toxic gas. The main issues due to the high concentrations of H2 S in biogas are its corrosive action, which damages engines and the production of sulfur oxides (SOx ) due to H2 S combustion. The best ways to remove H2 S from biogas are the biological methods with the use of biofilters, biotrickling filters, bioscrubbers and using of activated sludge.
Architecture, Civil Engineering, Environment , ISSUE 1, 103–112
The efficiency of nitrification has a great influence on the effect of removing nitrogen from wastewater. Problems with the process are associated with reducing the age of activated sludge, lower temperatures of wastewater in aeration chambers, rapid changes in the amount and composition of wastewater containing toxic substances or inhibiting the oxidation of ammonia nitrogen. The research concerned the possibility of cultivation and storage of the nitrifying bacteria biomass, which could be
Architecture, Civil Engineering, Environment , ISSUE 1, 113–118
anthropogenic nitrogen compounds .
Therefore, it is commonly agreed that the wastewater treatment plants should be supplied with highly effective technologies of nitrogen removal . The innovative technologies to remove ammonia nitrogen, coming from sludge dewatering and thickening processes, in the sidestream processes are applied to increase efficiency of total nitrogen removal and to reduce its concentration in the treated wastewater discharged into the rivers.
The main application of
Architecture, Civil Engineering, Environment , ISSUE 4, 115–123
Architecture, Civil Engineering, Environment , ISSUE 3, 127–133
Sewage treatment system is a complicated nonlinear system with multi-variables, chemical reaction, biological process and altered loads, hard to describe mathematically. Thus prediction of the effluent quality parameters of sewage treatment plant has being a challenge. In this paper we adopt fusion of two BP networks to predict sewage quality parameters with a popular process Cyclic Activated Sludge System (CASS). We take use of SVM (support vector machine) to classify the input data into two
International Journal on Smart Sensing and Intelligent Systems , ISSUE 2, 909–926
Therefore, it is necessary to search for, study and technically implement new methods of wastewater treatment. New technologies and developments must not only ensure greater efficiency, but also take into account other factors such as energy intensity, the type of chemicals dosed or economic viability. The environmental impact, and in particular the management of by-products, is also a very important issue, which is becoming increasingly problematic especially in the case of sewage sludge
Architecture, Civil Engineering, Environment , ISSUE 3, 153–159
Wastewater and sewage sludge is a place of occurrence of the many microorganisms, including pathogenic and relatively pathogenic bacteria. Their number is subject to significant changes over time, and depends on many factors such as: type of wastewater flowing into the treatment plant, or the presence of substances that are a source of food for microorganisms. Wastewater allows microorganisms to enter other environments, such as receiver waters or soil. The type of pathogens
Architecture, Civil Engineering, Environment , ISSUE 3, 131–136
. 2015; Cai and Wang 2016). However, many pretreatment methods are not economically feasible and may produce toxic compounds such as furfural and phenolic compounds, which could inhibit hydrogen fermentation.
Complex substrates could be hydrolyzed in a non-sterile environment with mixed anaerobic consortia (like anaerobic sludge). They are the natural source of microorganisms with a wide range of hydrolytic and catabolic enzymatic activities (Gadow et al. 2012; Wang and Yin 2017). However
Polish Journal of Microbiology , ISSUE 1, 109–120
, industrial wastes carrying azo dyes must be pretreated prior to its disposal to the environment.
The physical and chemical effluent-treatment strategies, for example, adsorption, synthetic precipitation, and flocculation, are inefficient because of the prerequisite of strong foundation, high cost, and generation of secondary-sludge (McMullan et al. 2001). Given the disadvantages of chemical treatments, microbial remediation procedures have gained strong consideration during recent decades. Fungi turned
SEHAR AFSHAN NAZ,
HAFIZ RUB NAWAZ,
Polish Journal of Microbiology , ISSUE 2, 193–203