scholarly journals Advanced treatment of effluent extended aeration process using biological aerated filter (BAF) with natural media: modification in media, design and backwashing process

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Malakootian ◽  
Ali Toolabi ◽  
Saeed Hosseini
Keyword(s):  
High Efficiency ◽  
Treatment Plant ◽  
Hospital Wastewater ◽  
Optimal Method ◽  
Metal Grid ◽  
Before And After ◽  
The Media ◽  
Aeration Process ◽  
Aerated Filter ◽  
Natural Media

AbstractBiological aerated filters (BAFs) have high filtration efficiency due to their tolerance of hydraulic and organic shocks are suitable for the treatment of complex and sanitary wastewater. In this study, for the first time, natural media of date kernel from Bam city was used as the BAF reactor media, with a meshing sand filter separated by a standard metal grid from the natural filter section used at the end of the reactor. This can be considered an innovation in the media and filtration. Aeration in the related reactor with 160 cm height was performed bilaterally as up-flow and continuously by nozzles throughout the reactor media. In this work, the actual effluent of the hospital wastewater treatment plant was employed as the inflow wastewater to the reactor, and its organic and inorganic parameters were measured before and after the treatment by the BAF reactor. The backwashing process was also studied in three ways: bottom backwashing (TB), top backwashing (BB), and top and bottom backwashing (TBBS), to determine the amount of water consumed and to achieve the desired result. According to the results obtained in this study, the removal efficiencies of inorganic and microbial contaminants, amoxicillin and azithromycin were obtained as follows: BOD5: 98.48%, COD: 92.42%, $${\text{NO}}_{3}^{ - }$$ NO 3 - : 99.4%, P: 93.3%, Coliforms: 97%, Color: 42.8%, Turbidity: 95%, Sulphate: 30%, TSS: 98.9%, Amoxicillin: 20% and azithromycin: 13%. In the backwashing process, the amount of water consumed in these three TB, BB, and TBBS methods were obtained 300, 164, and 118 L, respectively, So, TBBS method was selected as the optimal method. Based on the results obtained in this study, it is concluded that the BAF process with natural date kernel has a high efficiency in removing organic and inorganic contaminants from hospital wastewater, also the concentration of most of the effluent parameters was less or in accordance with EPA standard.

Advanced Treatment of Effluent Extended Aeration Process Using Biological Aerated Filter (BAF) With Natural Media: Modification in Media, Design, and Backwashing Process

2021 ◽  
Author(s):  
Ali Toolabi ◽  
mohammad malakootian ◽  
saeed hosseini
Keyword(s):  
Treatment Plant ◽  
Optimal Method ◽  
Media Design ◽  
Metal Grid ◽  
Before And After ◽  
The Media ◽  
Aeration Process ◽  
Aerated Filter ◽  
First Time ◽  
Natural Media

Abstract Due to their tolerance of hydraulic and organic shocks, biological aerated filters (BAFs) have high filtration efficiency and are suitable for the treatment of complex and sanitary wastewater. In this study, for the first time, natural media of date kernel from Bam city was used as the BAF reactor media, with a meshing sand filter separated by a standard metal grid from the natural filter section used at the end of the reactor. This can be considered an innovation in the media and filtration. Aeration in the related reactor with 160 cm height was performed bilaterally as up-flow and continuously by nozzles throughout the reactor media. In this work, the actual effluent of the hospital wastewater treatment plant was employed as the inflow wastewater to the reactor, and its organic and inorganic parameters were measured before and after the treatment by the BAF reactor. The backwashing process was also studied in three ways: bottom backwashing (TB), top backwashing (BB), and top and bottom backwashing (TBBS), to determine the amount of water consumed and to achieve the desired result. According to the results obtained in this study, the removal efficiencies of inorganic and microbial contaminants, amoxicillin and azithromycin were obtained as follows: BOD5: 98.48%, COD: 92.42.8%, NO-3: 99.4%, P: 93.3%, Coliforms: 97%, Color: 42.8%, Turbidity: 95%, Sulphate: 30%, TSS: 98.9%, Amoxicillin: 20% and azithromycin: 13%. The TBBS method was selected as the optimal method. The effect of backwashing effluent return was evaluated on the results of the parameters. The concentration of most of the outflow parameters was less or in accordance with EPA agriculture standard 2012.

Advanced treatment of effluent extended aeration process using biological aerated filter with natural media: modification in media, design and backwashing process

2020 ◽  
Author(s):  
Mohammad Malakootian ◽  
Saeed Hosseini ◽  
Ali Toolabi
Keyword(s):  
Treatment Plant ◽  
Optimal Method ◽  
Metal Grid ◽  
Before And After ◽  
One Step ◽  
The Media ◽  
Return Method ◽  
Aeration Process ◽  
Aerated Filter ◽  
Natural Media

Abstract Due to their tolerance of hydraulic and organic shocks, biological aerated filters (BAFs) have high filtration efficiency and are suitable for the treatment of complex and sanitary wastewater. In this study for the first time, natural media of date kernel from Bam city was used as the BAF reactor media and, at the end of the reactor, a meshing sand filter separated by a standard metal grid from the natural filter section was used. This can be considered innovations in the media and filtration. In this work, the actual effluent of the hospital wastewater treatment plant was employed as the inflow wastewater to the reactor, and its organic and inorganic parameters were measured before and after the treatment by the BAF reactor. Reactor effluent measurement was studied in two steps. In one step, the effluent from the backwashing was returned to the reactor and, in the other step, effluents did not return to the reactor, the comparison of which showed that the backwashing effluent return method had more removal efficiency. The backwashing process was also studied in three ways: bottom backwashing (TB), top backwashing (BB), and top and bottom backwashing (TBBS), to determine the amount of water consumed and to achieve the desired result. Finally, the TBBS method was selected as the optimal method. The effect of backwashing effluent return was evaluated on the results of the parameters. Concentration of most of the outflow parameters was less or in accordance with EPA standard 2012.

Nutrient removal in reverse osmosis concentrates using a biological aerated filter

2014 ◽  
Vol 15 (2) ◽  
pp. 302-307 ◽  
Author(s):  
H. J. Choi
Keyword(s):  
Reverse Osmosis ◽  
Removal Efficiency ◽  
Nutrient Removal ◽  
Biochemical Oxygen Demand ◽  
High Efficiency ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Biological Aerated Filter ◽  
Aerated Filter ◽  
Ro Concentrate

The aim of this study is to employ a biological aerated filter (BAF) in the treatment of reverse osmosis (RO) concentrate received from reuse of treatment plant wastewater. Furthermore, the influence of chemical oxygen demand (COD)/N ratio on the nutrient removal was analyzed to find the detailed removal pathways of nutrients. The result was found to be high efficiency for biochemical oxygen demand removal (95.86%) compared to that of COD (88.95%) and suspended solids (81.12%). The total phosphorus (TP) (67.66%) and PO4-P (61.42%) removal efficiencies were relatively lower than that of total nitrogen (TN) (81.42%) and NO3-N (76.70%). This may be due to the fact that the biochemical oxygen demand (BOD)/TP ratio (8.01) was relatively low. Decreasing the COD/N ratio decreased TP and PO4-P removal efficiency. However, the removal efficiency of TN and NH4-N was increased from 47.60 to 64.54 and 54.17 to 73.72% with decreasing of COD/N ratio from 8.19 to 7.64, respectively. In addition, the denitrification rate and nitrification rate were increased from 211.8 to 301.0 mg/L d and 87.7 to 109.4 mg/L d, respectively, when COD/N ratios changed from 8.19 to 7.64. Therefore, in order to reuse the RO concentrate, the BAF process could effectively treat the RO concentrate.

scholarly journals Aeration Process in Bioreactors as the Main Energy Consumer in a Wastewater Treatment Plant. Review of Solutions and Methods of Process Optimization

Processes ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 311 ◽  
Author(s):  
Jakub Drewnowski ◽  
Anna Remiszewska-Skwarek ◽  
Sylwia Duda ◽  
Grzegorz Łagód
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
High Efficiency ◽  
Good Condition ◽  
Treatment Plant ◽  
Treatment Technology ◽  
Conventional Activated Sludge ◽  
Smart Control ◽  
Biological Decomposition ◽  
Aeration Process

Due to the key role of the biological decomposition process of organic compounds in wastewater treatment, a very important thing is appropriate aeration of activated sludge, because microorganisms have to be supplied with an appropriate amount of oxygen. Aeration is one of the most energy-consuming processes in the conventional activated sludge systems of wastewater treatment technology (may consume from 50% to 90% of electricity used by a plant), which makes it the most cost-generating process incurred by treatment plants. The paper presents the construction of aeration systems, their classification as well as parameters and factors that significantly affect the aeration process e.g., oxygen transfer efficiency, diffuser fouling, methods of dealing with diffuser fouling, diffuser selection. Additionally, there are briefly presented “smart control” systems in wastewater treatment and effect of application control strategy based on Supervisory Control and Data Acquisition system connected with the decrease in the energy consumption for aeration of bioreactors with activated sludge. It is noted that before the process is optimized, the system should be equipped with suitable metering devices. Only when relevant data is available, the improvements can be carried out. However, it’s important, that the operator should regularly maintain good condition and high efficiency of diffusers.

SINERGI ANTARA TRIPUSAT PENDIDIKAN ISLAM DI KECAMATAN NONGGUNONG KABUPATEN SUMENEP

Edupedia ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 1-11
Author(s):  
Zainol Huda
Keyword(s):  
High School ◽  
Junior High School ◽  
Junior High ◽  
Islamic Education ◽  
Report Cards ◽  
Educational Institutions ◽  
Before And After ◽  
New Students ◽  
The Media ◽  
Three Components

The responsibility of Islamic education cannot be carried out unilaterally. Ki Hajar Dewantara stated that it requires the cooperation of three components which called as tripusat pendidikan education (center of three in education), they are families, educational institutions, and society. Those three components are one unit and complement each other. This is what happened at MTs Zainur Ridla (Islamic Junior High School Zainur Ridla) and MTs. Bustanul Ulum (Islamic Junior High School Bustanul Ulum), both of them are in Nonggunong District, Sumenep Regency. The findings in this research indicate that student’s guardians in MTs Zainur Ridla and MTs Bustanul Ulum Nonggunong have awareness about the responsibility of Islamic education. Second, all teacher councils in those two Islamic Junior High School stated that educating responsibility was on their control with habituation for their students in the form of reciting Shalawat Nariyah, reciting short surahs before the lesson began, praying before and after the lesson, shaking hands with teacher councils when coming and going home. Third, the participation of the society in realizing the responsibility of Islamic education through the media and the tradition of Kompolan. Fourth, the pattern of cooperation between madrasah (school) and student’s guardians in the form of: Home visits, inviting student’s guardians, forming madrasah supporting body, and report cards. While the pattern of cooperation between madrasah and society is their involvement in PHBI (Commemoration Islamic Feast Day) activities, their involvement in camp activities, their involvement in accepting new students, and their involvement in enforcing the discipline and regulations at madrasah.

EFFICIENCY OF NEW HEMOSORBENT IN ACUTE AMITRIPTYLINE AND CYCLODOL POISONING

2020 ◽  
pp. 14-18
Author(s):  
A. M. Fomin
Keyword(s):  
Clinical Effect ◽  
High Efficiency ◽  
Initial Level ◽  
Synthetic Polymer ◽  
Complex Treatment ◽  
Direct Hemoperfusion ◽  
Selective Sorption ◽  
Positive Clinical Effect ◽  
Before And After

A complex treatment of a patient with acute amitriptyline and cyclodol poisoning using enterosorption, intestinal lavage and hemosorption on a new column with a synthetic sorbent is presented. A two-layer synthetic polymer column developed for the selective sorption of cytokines by direct hemoperfusion was used for hemosorption. Quantitative determinations of amitriptyline and cyclodol levels before and after the column, as well as before and after hemosorption have showed high efficiency of the sorbent to remove the toxicant from the blood. The use of 6-hour hemosorption allowed to reduce the level of amitriptyline from the initial level by more than 4 times and the level of cyclodol - by more than 3 times to therapeutic levels and to obtain a pronounced positive clinical effect in the complex treatment of a patient with severe poisoning.

Constructing Public Opinion and Manipulating Symbols: China's Press Cover-age of the Student Movement in 1989

1995 ◽  
Vol 72 (2) ◽  
pp. 412-425 ◽  
Author(s):  
Guo-Qiang Zhang ◽  
Sidney Kraus
Keyword(s):  
Content Analysis ◽  
Public Opinion ◽  
Chinese Communist Party ◽  
Student Movement ◽  
Dominant Ideology ◽  
Tiananmen Square ◽  
The Press ◽  
Before And After ◽  
The Media ◽  
The Military

This content analysis of Chinese newspapers before and after the Tiananmen Square protest examines the symbolic representation of the Student Movement of 1989 in China. The study reveals that top leaders manipulated symbols given to the media and that these symbols rigorously highlighted the dominant ideology of the Chinese Communist Party and isolated the movement participants. Officials attempted to legitimize the military suppression of the movement. The press construction of public opinion echoed the hegemonic process created and maintained by the party structure.

Application of Anoxic-Aerobic Biological Process for Treatment of Compositive Electroplating Wastewater

2012 ◽  
Vol 518-523 ◽  
pp. 2361-2365
Author(s):  
Yong Fu Guo ◽  
Wei Wu ◽  
Wen Cheng Huang ◽  
Hong Zhang ◽  
Yong Jian Liu ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Treatment Plant ◽  
National Standard ◽  
Municipal Wastewater Treatment ◽  
Emission Standard ◽  
Electroplating Wastewater ◽  
Nickel Chromium ◽  
Local Standard ◽  
Aerated Filter ◽  
Key Industries

In this paper, different physicochemical processes are used to remove heavy metals in electroplating wastewater containing nickel, chromium and fluorine. More, the three items of phosphate, NH4+-N and CODcr are also needed to be decreased to meet discharge standards. Based on the various characteristics of electroplating wastewater, biochemistry technologies are used to improve the effluent quality after pretreatment for actual origin wastewater. Anoxic reactor and biological aerated filter are employed as biological processes (A/O process) to decrease the effluent concentration of CODcr and NH4+-N. The results show that the system effluent meets the national standard of “Emission Standard of Pollutants for Electroplating” (GB 21900-2008), and NH4+-N item reaches the local standard of “Discharge Standard of Main Water Pollutants for Municipal Wastewater Treatment Plant & Key Industries of Taihu Area” (DB 32/1072-2007). The modified A/O process realizes a high denitrification removal of 80%, and the operation cost is only 2.67 Yuan/m3.

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