Seawater biofiltration pre-treatment system: comparison of filter media performance

2013 ◽  
Vol 52 (34-36) ◽  
pp. 6325-6332 ◽  
Author(s):  
A. Shrestha ◽  
S. Jeong ◽  
S. Vigneswaran ◽  
J. Kandasamy
Keyword(s):  
Treatment System ◽  
Filter Media ◽  
Media Performance ◽  
Pre Treatment

Performance of hybrid small wastewater treatment system consisting of jet mixed separator and rotating biological contactor

1997 ◽  
Vol 35 (6) ◽  
pp. 63-70 ◽  
Author(s):  
Yoshimasa Watanabe ◽  
Yoshihiko Iwasaki
Keyword(s):  
Wastewater Treatment ◽  
Electric Power ◽  
Hybrid System ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Treatment System ◽  
Municipal Wastewater Treatment ◽  
Wastewater Treatment System ◽  
Pre Treatment ◽  
Organic Particles

This paper describes a pilot plant study on the performance of a hybrid small municipal wastewater treatment system consisting of a jet mixed separator(JMS) and upgraded RBC. The JMS was used as a pre-treatment of the RBC instead of the primary clarifier. The treatment capacity of the system was fixed at 100 m3/d, corresponding to the hydraulic loading to the RBC of 117 L/m2/d. The effluent from the grid chamber at a municipal wastewater treatment plant was fed into the hybrid system. The RBC was operated using the electric power produced by a solar electric generation panel with a surface area of 8 m2 under enough sunlight. In order to reduce the organic loading to the RBC, polyaluminium chloride(PAC) was added to the JMS influent to remove the colloidal and suspended organic particles. At the operational condition where the A1 dosage and hydraulic retention time of the JMS were fixed at 5 g/m3 and 45 min., respectively, the average effluent water quality of hybrid system was as follows: TOC=8 g/m3, Total BOD=8 g/m3, SS=8 g/m3, Turbidity=6 TU, NH4-N=7 g/m3, T-P=0.5 g/m3. In this operating condition, electric power consumption of the RBC for treating unit volume of wastewater is only 0.07 KWH/m3.

scholarly journals An Overview of the Removal Phosphorus in Wastewater

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Norwardatun Abd Roni ◽  
◽  
Suraya Hani Adnan ◽  
Nuramidah Hamidon ◽  
Tuan Noor Hasanah Tuan Ismail ◽  
...  
Keyword(s):  
Critical Factor ◽  
Recycled Concrete ◽  
Filter Media ◽  
Column Studies ◽  
Recycled Concrete Aggregates ◽  
Al Content ◽  
Removal Capacity ◽  
Filter Materials ◽  
Pre Treatment ◽  
P Removal

The high levels of phosphorus (P) removal occurring through human activities contributes to Eutrophication. Therefore, it is important to understand the quantity of P flows of the different filter materials. This paper provides an overview on the different filter media used for P removal from wastewater also the conventional wastewater treatment system for phosphorus removal. The filter materials consist of natural materials, industrial by-products and man-made products. Most filters have been investigated in batch and column studies in laboratory. The results from these overview vary for every filters and recycled concrete aggregates (RCA) have demonstrated promising properties with regard to P removal capacity. The chemical composition of the adsorption media is a critical factor. Because phosphorus is removed via sorption and precipitation processes, Calcium (Ca), Iron (Fe) and Aluminium (Al) content is important in efficient P removal. Thus filter media should be selected very carefully. In such systems, appropriate pre-treatment will also allow for a longer lifetime of the filter media, by decreasing the risk of clogging and allowing one to use finer reactive filter media with higher sorption capacity. The usage of these alternatives filters materials will ease the environmental problems that are currently perceived globally.

Evaluation of Filter Media Performance

1961 ◽  
Vol 53 (11) ◽  
pp. 869-872 ◽  
Author(s):  
Sperry. Ehlers
Keyword(s):  
Filter Media ◽  
Media Performance

Mini pretreatment system integrated with micro pre-concentrator and micro GC column

Sensor Review ◽  
2017 ◽  
Vol 37 (2) ◽  
pp. 137-141 ◽  
Author(s):  
Yanni Zhang ◽  
Jianhai Sun ◽  
Xiaofeng Zhu ◽  
Jinhua Liu ◽  
Zhanwu Ning
Keyword(s):  
Design Methodology ◽  
Gas Mixtures ◽  
Treatment System ◽  
Gas Chromatograph ◽  
Content Type ◽  
Analytical Instruments ◽  
Portable Instruments ◽  
Pre Treatment ◽  
Walled Carbon Nanotubes ◽  
Limited Sensitivity

Purpose As the concentration of environmental samples was generally very low and existing analytical instruments had limited sensitivity, developing mini pre-treatment systems for effectively concentrating the components was very important and necessary. The purposed of this paper is to develop mini pretreatment system integrated with micro pre-concentrator and micro GC column. Design/methodology/approach In this work, a mini pre-treatment system integrated with a micro pre-concentrator and a micro gas chromatograph (GC) column was proposed. The micro pre-concentrator filled with single-walled carbon nanotubes as adsorbent materials was able to effectively concentrate the trace environmental sample, which dramatically improved the response of detectors. In addition, instead of conventional columns, micro GC columns were able to effectively separate gas mixtures, which are able to overcome low resolution and poor anti-interference ability of portable instruments. Findings The results demonstrated that the proposed pre-treatment system was able to concentrate the trace sample with a concentration factor of 15 and effectively separate the gas mixtures with a resolution over 1.5. Originality/value A mini pre-treatment system integrated with a micro pre-concentrator and a micro GC column was proposed.

Removing of Nano-Particles from Semiconductor Wastewater Using a Hybrid Treatment System

2012 ◽  
Vol 528 ◽  
pp. 71-74
Author(s):  
B. M. Yang ◽  
C. M. Kao ◽  
W. P. Sung ◽  
C. P. Yang ◽  
T. Y. Chen
Keyword(s):  
Treatment Process ◽  
Membrane System ◽  
Nano Particles ◽  
Treatment System ◽  
Wafer Fabrication ◽  
Particle Removal ◽  
Nano Particle ◽  
Ultra Filtration ◽  
Pre Treatment ◽  
Flocculation Process

Packaging process is one of the main manufacturing steps in the wafer fabrication industries. However, nano-particles would be produced during the packaging process. The produced nano-particle-contained wastewater has characteristics of dark color and high turbidity. Because the nano-particles would usually result in the clogging of the membrane filtration system when it is used for water treatment and reclamation, the application of a pre-treatment system is required to extend the membrane life. The objective of this study was to develop a pre-treatment system for packaging wastewater treatment before membrane system was applied for further water quality improvement. In this laboratory-scale study, a hybrid treatment system containing a chemical coagulation/flocculation followed by ultra-filtration (UF) membrane technology was developed for the wafer fabrication wastewater treatment. The chemical coagulation/flocculation unit was used as the pre-treatment process to improve the efficiency of the following ultra-filtration (UF) membrane system. The packaging wastewater was collected from a wafer fabrication factory and used to evaluate the feasibility of the coagulation/flocculation process on nano-scale particle removal. Results show that approximately 98% of turbidity could be removed at pH 7 when 2.2 mg/L of polyaluminum chloride (PAC) (used as coagulant) and 0.5 mg/L of polyacrylamide (cPAM) (used as flocculant) were added during the coagulation/flocculation process. Results indicate that the coagulation/flocculation is a feasible pre-treatment process for nano-particle removal before UF membrane is applied for further water purification. Results from this study will be helpful in designing a scale-up system for practical applications.

Biological pre-treatment system for ammonia removal from slightly contaminated river used as a drinking water source

2021 ◽  
Vol 147 ◽  
pp. 385-391
Author(s):  
Yi-Ju Wu ◽  
Yi-Wen Liu ◽  
Hai-Hsuan Cheng ◽  
Chih-Wen Ke ◽  
Tsair-Fuh Lin ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Source ◽  
Ammonia Removal ◽  
Treatment System ◽  
Drinking Water Source ◽  
Pre Treatment

scholarly journals A new optional recycled water pre-treatment system prior to use in the household laundry

2014 ◽  
Vol 476-477 ◽  
pp. 513-521 ◽  
Author(s):  
Zhuo Chen ◽  
Huu Hao Ngo ◽  
Wenshan Guo ◽  
Thi Thu Nga Pham ◽  
Richard Lim ◽  
...  
Keyword(s):  
Treatment System ◽  
Recycled Water ◽  
Pre Treatment

scholarly journals OPERATIONAL PERFORMANCE OF VERTICAL UPFLOW ROUGHING FILTER FOR PRE-TREATMENT OF LEACHATE USING LIMESTONE FILTER MEDIA

2013 ◽  
pp. 117-125
Author(s):  
Augustine Chioma Affam
Keyword(s):  
Steady Flow ◽  
Removal Efficiency ◽  
Flow Rate ◽  
Operational Performance ◽  
Main Experiment ◽  
Filter Media ◽  
Filtration Process ◽  
Optimum Treatment ◽  
Pre Treatment ◽  
Filtration Technique

This study was conducted to investigate the removal of COD, BOD, turbidity and colour from leachate using vertical upflow filtration technique. Limestone media with a density of 2554kg/m3 was crushed and graded in sizes of 4-8 mm, 8-12 mm and 12-18 mm. Trial runs were done before the main experiment at an interval of 24 h analysis. Leachate was between pH 7.94 to 8.12 before experiments but increased to pH 8.42 after the filtration process. Maximum headloss at steady flow rate 20mL/min was 0.5 cm. The optimum treatment was achieved with 4 – 8 mm, 8 – 12 mm & 12 – 18 mm media size in combination and removal efficiency was 22 to 81 %, 22 to 75 %, 32 to 86 %, and 36 to 62 % for BOD, COD, turbidity and colour respectively. Vertical upflow roughing filter can be used for pre-treatment of leachate before further treatment.

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