Optimization of the Proportion of the Activated Sludge Irradiated with Low-Intensity Ultrasound for Improving the Quality of Wastewater Treatment

2010 ◽  
Vol 215 (1-4) ◽  
pp. 621-629 ◽  
Author(s):  
Beizhen Xie ◽  
Hong Liu
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Low Intensity ◽  
Low Intensity Ultrasound

Nitrification and mass balance with a membrane bioreactor for municipal wastewater treatment

1996 ◽  
Vol 34 (1-2) ◽  
pp. 129-136 ◽  
Author(s):  
Fan Xiao-Jun ◽  
Vincent Urbain ◽  
Yi Qian ◽  
Jacques Manem
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Membrane Bioreactor ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Rate Coefficients ◽  
Nitrification Rate ◽  
Municipal Wastewater Treatment ◽  
Effluent Quality

The overall performance of the Membrane Bioreactor (MBR) process for municipal wastewater treatment was studied to determine the characteristics of activated sludge under different Sludge Retention Times (SRT) and Hydraulic Retention Times (HRT). The experiment lasted over a period of 300 days, which included 4 runs. The effluent quality of the MBR process in terms of COD and suspended solids, was excellent under all conditions tested. Specific nitrification rates of the activated sludge were measured at steady state in each run. Similar maximum nitrification rate values were obtained through batch experiments with either only NH4Cl or raw wastewater as substrate. Mass balances of the process in terms of COD, nitrogen and inorganic suspended solids were made, and it was found that 28%, 42%, and 48% of influent COD were converted into activated sludge at SRTs of 20, 10, and 5 days, respectively. The COD/VSS ratio of the activated sludge seems to be dependent on mass loading rate. The estimated true yield and decay rate coefficients of the activated sludge were 0.61 kgCOD/kgCOD and 0.050 d−1, respectively. In the completely aerobic system, nitrogen balances were always close to 100%.

scholarly journals Organic, nitrogen, and phosphorus removal in hospital wastewater treatment using activated sludge and constructed wetlands

2021 ◽  
Vol 896 (1) ◽  
pp. 012076
Author(s):  
V Hanny ◽  
A M Rizal ◽  
Nasuka
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Constructed Wetlands ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Appropriate Technology ◽  
Integrated System ◽  
Hospital Wastewater ◽  
Nitrogen And Phosphorus

Abstract Due to COVID-19 pandemic, hospital becomes the main and critical facility in any countries. This has also negatively affected the environment, as the wastewater discharged was also increased. Wastewater treatment plant in the hospital will also be affected as there will be fluctuations in volume and quality of wastewater. Hence there is an urgency to choose the appropriate technology as main solution and to improve existing wastewater treatment plant. We will report the performance of integrated system of activated sludge and constructed wetlands applied in a hospital wastewater treatment plant. Both technologies were chosen because they are simple, cheap, and highly effective technologies for wastewater treatment. Activated sludge was able to reduce organic, ammonia, and phosphat content significantly. However, the quality of effluent was still not able to meet the regulation. Application of constructed wetlands as finishing treatment was able to improve the quality of effluent to meet the standard and resulted in BOD, COD, ammonia, and phosphate of 25 mg/L, 24.18 mg/L, <0.01 mg/L, and 0.46 mg/L, respectively. Hence it can be concluded that the integration of activated sludge and constructed wetlands can be an appropriate and effortless treatment system for low-strength wastewater to meet a strict quality standard.

scholarly journals Microscopic Analysis of Activated Sludge in Industrial Textile Wastewater Treatment Plant

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Katarzyna Paździor ◽  
Lucyna Bilińska
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Microscopic Analysis ◽  
Textile Wastewater ◽  
Biotic Index ◽  
Filamentous Microorganisms ◽  
Textile Wastewater Treatment

AbstractThe relationship between a quality of activated sludge microbiota and wastewater treatment plant (WWTP) operational stability has been defined in the past few decades. However, this dependence is not so clear in the case of industrial wastewater treatment. In this article, a very specific example of industrial textile wastewater treatment plant (ITWTP) is analyzed. Textile effluents are well known as highly contaminated wastewater containing many biodegradable compounds. Microscopic analysis included flocs morphology examination, attempts to evaluate the Sludge Biotic Index (SBI), and identification of dominant filamentous microorganisms. Routine operational control of ITWTP covered pH, temperature, redox potential, dissolved oxygen and COD measurements. The average ecosystem existing in the described ITWTP differed significantly compared to municipal WWTPs. The flocs were smaller and irregular. Filamentous bacteria did not cause foaming although filaments index reached 4. Nostocoida limicola I dominated with significant amounts of type 0041 and type 021N. The evaluation of SBI was impossible as the most of protozoan was in the form of cysts. The overall microbiota diversity correlated with COD removal in activated sludge unit of ITWTP.

scholarly journals OPTIMALISASI IPAL GEDUNG ARIOBIMO DENGAN MODIFIKASI PROSES LUMPUR AKTIF DAN BIOFILTER

2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Setiyono Setiyono
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Treatment Plant ◽  
Domestic Wastewater ◽  
Quality Standards ◽  
Activated Sludge Process ◽  
Treatment Technology ◽  
Process Modification ◽  
Domestic Wastewater Treatment

Ariobimo building, now has a domestic wastewater treatment plant which is equipped with the system re-use. At first, the process of wastewater treatment technology using activated sludge process, while the system re-use of wastewater using a combination of chemical-physical processes, namely the process of coagulation-flocculation followed by sedimentation, filtration and adsorption last with. Because this process is not optimal, then this WWTP outlet and the quality of its water re-use can not meet the expected quality standards. After the improvement of the existing activated sludge process, the quality of this WWTP outlet can meet the quality standards of waste discharges. While the process of coagulation-flocculation is replaced with biofilter process using  honey comb tube media, the quality of the effluent can meet water quality standards. Keywords :Domestic wastewater,process modification,  water reused. 

scholarly journals Quality of the Performance of the Wastewater Treatment Plant in the City of Hoceima, Morocco

2019 ◽  
Vol 9 (1) ◽  
pp. 2345-2348
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Low Load ◽  
Reduce Emissions ◽  
The City ◽  
Vital Resource

Renewable freshwater is a vital resource for life. Today, economic development goes hand in hand with the increase in consumption and the emergence of problems of availability or quality. The wastewater is treated in a wastewater treatment plant (Step) was late to reduce emissions and improve the protection of ecosystem quality. This study is the objective of ' exploring the cleansing station performance. The results show that the station ' Hociema by low load activated sludge allows eliminates bout 30 % to 70% for BOD5 . Nevertheless, the chemical oxygen demand is eliminated between 56% and 73% , and the COD/BOD5 ratio shows the biodegradable nature of the effluents that can be treated by a biological system, ie activated sludge treatment. from the city of Hoceima performing

scholarly journals Using high frequency and low-intensity ultrasound to enhance activated sludge characteristics

2019 ◽  
Vol 54 ◽  
pp. 274-280 ◽  
Author(s):  
Parviz Mohammadi ◽  
Nasim Karami ◽  
Ali Akbar Zinatizadeh ◽  
Farzaneh Falahi ◽  
Nasrin Aghamohammadi ◽  
...  
Keyword(s):  
Activated Sludge ◽  
High Frequency ◽  
Sludge Characteristics ◽  
Low Intensity ◽  
Low Intensity Ultrasound
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