作者:
Silva, Lucas de CarvalhoBernardelli, Jossy Karla BrasilSouza, Adelania de OliveiraLafay, Cíntia Boeira BatistaNagalli, AndréPassig, Fernando HermesKreutz, CristianeCarvalho, Karina Querne de
Civil Engineering Graduate Program Deputado Heitor de Alencar Furtado St 5000 Ecoville Paraná Curitiba81280-340 Brazil
Chemistry Academic Department Via do Conhecimento s/n - Km 01 Fraron Paraná Pato Branco85503-390 Brazil
Civil Construction Academic Department Deputado Heitor de Alencar Furtado St 5000 Ecoville Paraná Curitiba81280-340 Brazil
Chemistry and Biology Academic Department Deputado Heitor de Alencar Furtado St 5000 Ecoville Paraná Curitiba81280-340 Brazil
Environmental Academic Department Rosalina Maria dos Santos St 1233 Paraná Campo Mourão87301-899 Brazil
Removing phosphorus and endocrine-disruptors (EDC) is still challenging for low-cost sewage treatment systems. This study investigated the efficiency of three vertical-flow constructed wetlands (VFCW) vegetated with E...
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Removing phosphorus and endocrine-disruptors (EDC) is still challenging for low-cost sewage treatment systems. This study investigated the efficiency of three vertical-flow constructed wetlands (VFCW) vegetated with Eichhornia crassipes onto red clay (CW-RC), autoclaved aerated concrete (CW-AC), and composite from the chemical activation of autoclaved aerated concrete with white cement (CW-AAC) in the removal of organic matter, nutrients, and estrone, 17β-estradiol, and 17α-ethinylestradiol. The novelty aspect of this study is related to selecting these clay and cementitious-based materials in removing endocrine disruptors and nutrients in VFCW. The subsurface VFCW were operated in sequencing-batch mode (cycles of 48-48-72 h), treating synthetic wastewater for 308 days. The operation consisted of Stages I and II, different by adding EDC in Stage II. The presence of EDC increased the competition for dissolved oxygen (DO) and reduced the active sites available for adsorption, diminishing the removal efficiencies of TKN and TAN and total phosphorus in the systems. CW-RC showed a significant increase in COD removal from 65% to 91%, while CW-AC and CW-AAC maintained stable COD removal (84%–82% and 78%–81%, respectively). Overall, the substrates proved effective in removing EDC, with CW-AC and CW-AAC achieving >60% of removal. Bacteria Candidatus Brocadia and Candidatus Jettenia, responsible for carrying out the Anammox process, were identified in assessing the microbial community structure. According to the mass balance analysis, adsorption is the main mechanism for removing TP in CW-AC and CW-AAC, while other losses were predominant in CW-RC. Conversely, for TN removal, the adsorption is more representative in CW-RC, and the different metabolic routes of microorganisms, biofilm assimilation, and partial ammonia volatilization in CW-AC and CW-AAC. The results suggest that the composite AAC is the most suitable material for enhancing the simultaneous removal of organic ma
The use of motorcycles increased rapidly. Data from Yogyakarta Central Bureau Statistics showed from 2015 to 2019 the number of motorized vehicles increased by 8% every year. Motor vehicle air pollution comes from exh...
The use of motorcycles increased rapidly. Data from Yogyakarta Central Bureau Statistics showed from 2015 to 2019 the number of motorized vehicles increased by 8% every year. Motor vehicle air pollution comes from exhaust gases resulting from combustion. Becak Motorcycles are widely used in Yogyakarta and are usually used motorcycles with a long life. Hydrocarbons (HC) or unburned fuel and carbon monoxide (CO), were air-fuel control. This research was studied to determine the ability of palm shell activated charcoal to reduce CO, HC and noise. The 14 meshes sample diameter placed inside the tube from 24 meshes of stainless steels were prepared. The weight of activated charcoal of 10 grams, 20 grams and 30 grams were tried to reduce the In the exhaust of a 1984 Suzuki motorcycle with plate number AB 4194 CK, an exhaust extension was installed, then palm activated carbon was placed inside and the emission gases were measured. Stages 898 was used to test the emission. The smallest size could adsorb the largest emissions and noise. The weight of activated charcoal of 10 grams, 20 grams and 30 grams 14 meshes could reduce CO, HC and noise emission were 0.294 % to 0.616 %, 454 ppm to 798 ppm, -o.63 dB to 1.6 dB, respectively. The weight of activated charcoal of 10 grams, 20 grams and 30 grams 14 meshes saturated time were 270 seconds, 173 seconds and 299 seconds, respectively.
Cassava is an agricultural material that is considered as important raw resources in the industrial sector. The benefits are even greater after being modified using lactic acid bacteria. However, the mocaf industry of...
Cassava is an agricultural material that is considered as important raw resources in the industrial sector. The benefits are even greater after being modified using lactic acid bacteria. However, the mocaf industry often causes water and air pollution. environmental problems arise after the fermentation process. Determination problems with lightness, TDS (Total Dissolved Solid), conductivity and pH analysis are required to measure the impact to the environment. This research was used waste water from mocaf during 3 days fermentation. The wastewater had the highest color level (Lightness) on initial day of fermentation at 83.7±3.73 and then decrease along the day of fermentation at the averages of 65.2±2.0. The highest TDS was resulted from the mocaf wastewater at a value of 1218 ± 4.6 ppm which continued to decline until day 4. The conductivity and pH showed a decrease along the day of fermentation. As conclusion, physical characteristic of wastewater from mocaf production could be analyzed specifically and determined through color, TDS, conductivity, and pH.
Small-Scale Hydropower (SHP) had been important electric energy power source in Indonesia. Indonesia is vast countries, consists of more than 17.000 islands. It has large fresh water resource about 3 m of rainfall and...
Small-Scale Hydropower (SHP) had been important electric energy power source in Indonesia. Indonesia is vast countries, consists of more than 17.000 islands. It has large fresh water resource about 3 m of rainfall and 2 m of runoff. Much of its topography is mountainous, remote but abundant with potential energy. Millions of people do not have sufficient access to electricity, some live in the remote places. Recently, SHP development was encouraged for energy supply of the places. Development of global hydrology data provides opportunity to predict distribution of hydropower potential. In this paper, we demonstrate run-of-river type SHP spot prediction tool using SWAT and a river diversion algorithm. The use of Soil and Water Assessment Tool (SWAT) with input of CFSR (Climate Forecast System Re-analysis) of 10 years period had been implemented to predict spatially distributed flow cumulative distribution function (CDF). A simple algorithm to maximize potential head of a location by a river diversion expressing head race and penstock had been applied. Firm flow and power of the SHP were estimated from the CDF and the algorithm. The tool applied to Upper Citarum River Basin and three out of four existing hydropower locations had been well predicted. The result implies that this tool is able to support acceleration of SHP development at earlier phase.
The study of performance assessment based on problem based learning not only done in the field of technical vocational education but also in the health education, economic education, environmental education. The devel...
The study of performance assessment based on problem based learning not only done in the field of technical vocational education but also in the health education, economic education, environmental education. The development of performance assessment based on problem based learning is still rare in vocational schools. Using 2013 curriculum which is required to use 21st century learning strategies, one of which is Problem Based Learning (PBL). Performance assessment is said by its advocators to be more in line with instruction than multiple-choice tests. Performance assessment is seen as having a better possibility of measuring more complex skills and communication. This article aims to design based performance assessment based on problem based learning using design based research method. The validation used in this article is expert judgement. The result of the study revealed that the cronbach alpha valu for the entire measurment scale was 0.97. The cronbach alpha value is between 0.8 to 1.00. Therefore , design performance assessment based on problem based learning has a good reability. This article aims to find out how to design performance assessment based on problem based learning for students geomatics engineering. This article provide an overview of the development of design performance assessment based on problem based learning for vocational students.
On the implementation of the maintenance roads works in Nias, there has been no standardized system, in terms of work priority order. The purpose of this study was to determine the priority of strategic road order, wi...
On the implementation of the maintenance roads works in Nias, there has been no standardized system, in terms of work priority order. The purpose of this study was to determine the priority of strategic road order, with Analytical Network Process (ANP), which is based on technical criteria as the basis for determining the priority policy for development or maintenance of roads in Nias. As the results, several criteria based on stake holder judgment, which can be used as the basis for maintenance priority program of road, respectively are: accessibility 30.87%; regional connectivity 25.33%; movement needs 17.90%, regional strategic development purposes 13,49%, and road condition 12:42 %.
Kuala Namu International Airport started operating on July 25, 2013 to replace Polonia International Airport followed by the operation of airport train and bus as a public transport service mode. The purpose of the st...
Kuala Namu International Airport started operating on July 25, 2013 to replace Polonia International Airport followed by the operation of airport train and bus as a public transport service mode. The purpose of the study was to define the characteristic of airport train and bus users how they choose both of the transportation modes and to test the sensitivity, if one of the transportation attribute are changes. The data obtained through stated preference method was modelled by using binary logit and probit models. From these two models, the probability of using airport train and bus transportation can be known. The result of analysis showed the equations of the function of utility difference of airport train and bus: UKAB-BB = 2,606 − 0,028X1 − 0,007X2 − 0,014X3 − 0,016X4 + 0,044X5, where X1, (cost attribute), X2 (time attribute), X3 (headway attribute), X4 (access attribute) and X5 (service attribute)..
The function of the basement is to carry the weight of the upper structure into the soil and to resist lateral loads around the basement wall. One aspect of geotechnical engineering that often a problem in basement wa...
The function of the basement is to carry the weight of the upper structure into the soil and to resist lateral loads around the basement wall. One aspect of geotechnical engineering that often a problem in basement wall planning is the determination of lateral ground pressure in the basement wall due to earthquake which must be held by the basement wall. In this study, an analysis of the effects of local soil conditions due to dynamic loads is done through analysis of soil-structure interaction. The analysis is done by modeling the local soil with variations in basement depth and the adjacent basement distance to get the lateral pressure distribution due to dynamic load. The analyzed soil conditions are considered homogeneous at land sites SE (soft soil) with the dynamic load input from earthquake loads uses a 10% probability of exceedance in 50 years (500 years). The most influential parameter for soil displacement is the distance of the basement and then the depth of the basement. The most influential parameter on lateral forces is the depth of the basement followed by the distance of the basement.
The people of Aceh are well known as coffee drinkers. Therefore, a lot of coffee shops have been established in Aceh in the past decade. The growing of coffee shops resulting to large amounts of coffee waste produced ...
The people of Aceh are well known as coffee drinkers. Therefore, a lot of coffee shops have been established in Aceh in the past decade. The growing of coffee shops resulting to large amounts of coffee waste produced in Aceh Province that will become solid waste if not wisely utilized. The high carbon content in coffee underlined as background of this research to be utilized those used coffee grounds as bio-sorbent. The preparation of activated carbon from coffee grounds by using carbonization method that was initially activated with HCl was expected to increase the absorption capacity. The prepared activated carbon with high reactivity was applied to adsorb nitrite, nitrate and ammonia in wastewater outlet of PT. PIM wastewater pond. Morphological structure of coffee waste was analyzed by using Scanning Electron Microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The result showed that the adsorption capacity of iodine was equal to 856.578 mg/g. From the characterization results, it was concluded that the activated carbon from coffee waste complied to the permitted quality standards in accordance with the quality requirements of activated carbon SNI No. 06-3730-1995. Observed from the adsorption efficiency, the bio-sorbent showed a tendency of adsorbing more ammonia than nitrite and nitrate of PT. PIM wastewater with ammonia absorption efficiency of 56%.
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