scholarly journals A Step Forward to the Characterization of Secondary Effluents to Predict Membrane Fouling in a Subsequent Ultrafiltration

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1975
Author(s):  
Anderson Alejandro Benites-Zelaya ◽  
José Luis Soler-Cabezas ◽  
Eva Ferrer-Polonio ◽  
José Antonio Mendoza-Roca ◽  
María Cinta Vincent-Vela
Keyword(s):  
Membrane Fouling ◽  
Wastewater Reuse ◽  
Treatment Plant ◽  
Secondary Effluent ◽  
Ann Model ◽  
Tertiary Treatment ◽  
Mediterranean Countries ◽  
Membrane Technique ◽  
Artificial Neural Network Ann ◽  
Main Components

Nowadays, wastewater reuse in Mediterranean countries is necessary to cover the water demand. This contributes to the protection of the environment and encourages the circular economy. Due to increasingly strict regulation, the secondary effluent of a wastewater treatment plant requires further (tertiary) treatment to reach enough quality for its reuse in agriculture. Ultrafiltration is a membrane technique suitable for tertiary treatment. However, the most important drawback of ultrafiltration is membrane fouling. The aim of this work is to predict membrane fouling and ultrafiltered wastewater permeate quality for a particular membrane, using the information given by an exhaustive secondary effluent characterization. For this, ultrafiltration of real and simulated wastewaters and of their components after fractionation has been performed. In order to better characterize the secondary effluent, resin fractionation and further membrane ultrafiltration of the generated fractions and wastewater were performed. The results indicated that hydrophobic substances were lower than hydrophilic ones in the secondary effluent. Supelite DAX-8, Amberlite XAD-4 and Amberlite IRA-958 resins were found not to be specific for humic acids, proteins and carbohydrates, which are the main components of the effluent organic matter. Two models have been performed using statistics (partial least squares, PLS) and an artificial neural network (ANN), respectively. The results showed that the ANN model predicted permeate quality and membrane fouling with higher accuracy than PLS.

Tertiary treatment of secondary effluent using ultrafiltration for wastewater reuse: correlating membrane fouling with rejection of effluent organic matter and hydrophobic pharmaceuticals

2019 ◽  
Vol 5 (4) ◽  
pp. 672-683 ◽  
Author(s):  
Fangshu Qu ◽  
Hao Wang ◽  
Junguo He ◽  
Gongduan Fan ◽  
Zhihui Pan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Membrane Fouling ◽  
Wastewater Reuse ◽  
Secondary Effluent ◽  
Water Reclamation ◽  
Tertiary Treatment ◽  
Effluent Organic Matter ◽  
Retention Efficiency

Permeability loss and the low retention efficiency of soluble organics significantly restrict the application of ultrafiltration (UF) for water reclamation.

scholarly journals Study on operating flux of plate ceramic membrane treating municipal secondary effluent of WWTP

2018 ◽  
Vol 53 ◽  
pp. 04030
Author(s):  
Shoubin Zhang ◽  
Jingxiu Zhong ◽  
Wenhai Jiao ◽  
Liping Qiu ◽  
Yuze Li ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Membrane Fouling ◽  
Ceramic Membrane ◽  
Water Flux ◽  
Wastewater Reuse ◽  
Treatment Plant ◽  
Secondary Effluent ◽  
Water And Wastewater Treatment ◽  
Critical Flux ◽  
Municipal Secondary Effluent

In recent years, plate ceramic membrane has been applied in the field of water and wastewater treatment successfully, because of its unique advantages. As an important parameter which can characterize properties of membrane, the water flux and critical flux of plate ceramic membrane treating municipal secondary effluent of Wastewater Treatment Plant(WWTP) were studied in this paper. And the flux change characteristics under different membrane pressure were obtained. The experimental results laid foundation for further exploring of mechanism of membrane fouling and related control techniques, and provided references for expanded application of plate ceramic membrane in wastewater reuse.

Textile Wastewater Reuse: Ozonation of Membrane Concentrated Secondary Effluent

1999 ◽  
Vol 40 (4-5) ◽  
pp. 99-105 ◽  
Author(s):  
A. Lopez ◽  
G. Ricco ◽  
R. Ciannarella ◽  
A. Rozzi ◽  
A. C. Di Pinto ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Acute Toxicity ◽  
Wastewater Treatment Plant ◽  
Textile Industry ◽  
Nonionic Surfactants ◽  
Wastewater Reuse ◽  
Treatment Plant ◽  
Textile Wastewater ◽  
Secondary Effluent ◽  
Complete Disappearance

Among the activities appointed by the EC research-project “Integrated water recycling and emission abatement in the textile industry” (Contract: ENV4-CT95-0064), the effectiveness of ozone for improving the biotreatability of recalcitrant effluents as well as for removing from them toxic and/or inhibitory pollutants has been evaluated at lab-scale. Real membrane concentrates (pH=7.9; TOC=190 ppm; CDO=595 ppm; BOD5=0 ppm; Conductivity=5,000 μS/cm; Microtox-EC20=34%) produced at Bulgarograsso (Italy) Wastewater Treatment Plant by nanofiltering biologically treated secondary textile effluents, have been treated with ozonated air (O3conc.=12 ppm) over 120 min. The results have indicated that during ozonation, BOD5 increases from 0 to 75 ppm, whereas COD and TOC both decrease by about 50% and 30 % respectively. As for potentially toxic and/or inhibitory pollutants such as dyes, nonionic surfactants and halogenated organics, all measured as sum parameters, removals higher than 90% were achieved as confirmed by the complete disappearance of acute toxicity in the treated streams. The only ozonation byproducts searched for and found were aldehydes whose total amount continuously increased in the first hour from 1.2 up to 11.8 ppm. Among them, formaldehyde, acetaldehyde, glyoxal, propionaldehyde, and butyraldehyde were identified by HPLC.

Application of two approaches to model chlorine residuals in Severn Trent Water Ltd (STW) distribution systems

1997 ◽  
Vol 36 (5) ◽  
pp. 317-324 ◽  
Author(s):  
M.J. Rodriguez ◽  
J.R. West ◽  
J. Powell ◽  
J.B. Sérodes
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Treatment Plant ◽  
Residual Chlorine ◽  
Ann Model ◽  
Order Model ◽  
First Order ◽  
Chlorine Decay ◽  
Artificial Neural Network Ann ◽  
Key Parameter

Increasingly, those who work in the field of drinking water have demonstrated an interest in developing models for evolution of water quality from the treatment plant to the consumer's tap. To date, most of the modelling efforts have been focused on residual chlorine as a key parameter of quality within distribution systems. This paper presents the application of a conventional approach, the first order model, and the application of an emergent modelling approach, an artificial neural network (ANN) model, to simulate residual chlorine in a Severn Trent Water Ltd (U.K.) distribution system. The application of the first order model depends on the adequate estimation of the chlorine decay coefficient and the travel time within the system. The success of an ANN model depends on the use of representative data about factors which affect chlorine evolution in the system. Results demonstrate that ANN has a promising capacity for learning the dynamics of chlorine decay. The development of an ANN appears to be justifiable for disinfection control purposes, in cases when parameter estimation within the first order model is imprecise or difficult to obtain.

Enhanced Performance of Ultrafiltration Membrane with Powdered Zeolite Addition for Secondary Effluent Treatment

2013 ◽  
Vol 838-841 ◽  
pp. 2712-2716
Author(s):  
Yong Tu ◽  
Yong Gang Bai ◽  
Yong Chen ◽  
Wei Jing Liu ◽  
Jun Xu ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Fluorescence Spectra ◽  
Municipal Wastewater ◽  
Three Dimensional ◽  
Treatment Plant ◽  
Ultrafiltration Membrane ◽  
Effluent Treatment ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Sem Images

The research on ultrafiltration membrane assisted by powdered zeolite for the treatment of secondary effluent from a municipal wastewater treatment plant was studied. The results show that membrane fouling rate is reduced by pre-coating the ultrafiltration membrane with powdered zeolite, and the treatment performance of secondary effluent is enhanced. UV-vis, three-dimensional excitation emission matrix (3D-EEM) fluorescence spectra and scanning electron microscopy (SEM) images for ultrafiltration were also discussed.

scholarly journals Advanced phosphorus removal via coagulation, flocculation and microsieve filtration in tertiary treatment

2017 ◽  
Vol 75 (12) ◽  
pp. 2875-2882 ◽  
Author(s):  
M. Langer ◽  
J. Väänänen ◽  
M. Boulestreau ◽  
U. Miehe ◽  
C. Bourdon ◽  
...  
Keyword(s):  
Phosphorus Removal ◽  
Treatment Plant ◽  
Mesh Size ◽  
Secondary Effluent ◽  
Tertiary Treatment ◽  
Mixing Conditions ◽  
Viable Option ◽  
Polyaluminum Chloride ◽  
Effluent Quality ◽  
Coagulation And Flocculation

The applicability of microsieve technology together with coagulation and flocculation for advanced phosphorus removal was investigated. A pilot unit including a microsieve with 10 μm mesh size was operated continuously with secondary effluent from Ruhleben wastewater treatment plant in Berlin. By applying a pretreatment of 0.07–0.09 mmol/L (as metal) coagulant and 1.5–2 mg/L cationic polymer, total phosphorus values below 80 μg/L were achieved. Coagulation with polyaluminum chloride (PACl) produced a better effluent quality compared to FeCl3, as less suspended solids and less residual coagulant were found in the microsieve effluent. In addition, the transmittance of UV radiation through the water was improved by using PACl. The produced amount of backwash water was always below 3% (on average 1.6%). Under optimized mixing conditions, polymer doses of 0.6 mg/L were possible without losses in water quality and filtration performance. Microsieving with chemical pretreatment is a viable option for high quality effluent polishing.

Evaluation of Treatment Schemes Appropriate for Wastewater Reuse in Greece

2013 ◽  
Vol 5 (2) ◽  
pp. 1-8
Keyword(s):  
Uv Radiation ◽  
Wastewater Treatment Plants ◽  
Wastewater Reuse ◽  
Quality Criteria ◽  
Stochastic Approach ◽  
Experimental Information ◽  
Treated Wastewater ◽  
Secondary Effluent ◽  
Wastewater Reclamation ◽  
Tertiary Treatment

The scope of this paper is the evaluation of wastewater reuse quality criteria and treatment specifications, appropriate to Greek conditions. The parameters that affect wastewater reuse criteria were taken into consideration, concerning among others reuse priorities, available treatment plants and effluent characteristics. The proposed wastewater reclamation criteria were verified by a series of lab-scale experiments, designed to study the feasibility and effectiveness of the following treatment schemes to produce treated wastewater suitable for reuse: a) disinfection of secondary effluent with UV radiation and chlorination and b) tertiary treatment and disinfection of wastewater with UV radiation and chlorination. The experimental data were analyzed using a stochastic statistical model that employs Monte Carlo simulation. The main scope of the stochastic approach was the regeneration of a greater set of data, based on the defined by the experimental information mathematical distribution of each parameter involved and the determination of relative probability distributions. Following this approach the standards proposed are realistic and feasible and in the case of restricted reuse can be readily achieved by the existing wastewater treatment plants in Greece. Even in the case of unrestricted reuse the additional treatment required can be achieved at a moderate cost, through upgrading of the existing plants with tertiary treatment.

scholarly journals Tertiary Treatment for Safely Treated Wastewater Reuse

2021 ◽  
Author(s):  
Nebil Belaid
Keyword(s):  
Membrane Fouling ◽  
Large Scale ◽  
Wastewater Reuse ◽  
Experimental Studies ◽  
Cross Flow ◽  
Treated Wastewater ◽  
Transmembrane Pressure ◽  
Tertiary Treatment ◽  
Quality Of Water ◽  
Total Process

The tertiary treatment of resulting water from a conventional biological treatment process is envisaged in the aim to obtain a high quality of water that can be reused for different purposes. This treatment is based on the integration of the membrane-based technologies in the total process of wastewater treatment. The experimental studies are carried out on a small pilot, equipped with different mineral membranes of micro and ultrafiltration. These membranes are used for the different tested processes (MF, MF-UF and cogulation-MF). The results obtained make it possible to attend a complete elimination of the total flora and an additional reduction of the other parameters such as turbidity, suspended matter, COD and BOD. Tests on a large scale are then carried out on a semi-industrial pilot, equipped with the same type of membranes. The optimization of the operating conditions made allow the obtaining under the conditions of transmembrane pressure 0.85 bar, a cross flow velocity of 2.25m/s and with ambient temperature a filtrate flux of about 200 L/hm 2. The coupling of a stage of coagulation in the membrane process allows the reduction of the effect of the membrane fouling and an improvement of 36% of the filtrate flux.

scholarly journals Review of Wastewater Reuse in the Mediterranean Countries, Focusing on Regulations and Policies for Municipal and Industrial Applications

2013 ◽  
Vol 15 (3) ◽  
pp. 333-350 ◽  
Keyword(s):  
Water Supply ◽  
Mediterranean Region ◽  
Wastewater Reuse ◽  
Treatment Plant ◽  
Specific Treatment ◽  
Industrial Applications ◽  
Reclaimed Wastewater ◽  
Local Conditions ◽  
Mediterranean Countries ◽  
The Mediterranean

The present paper reviews the wastewater reuse regulations, practices and applications of countries around the Mediterranean Region, particularly focusing on reuse practices for municipal and industrial uses. Water scarcity and water need is established in Mediterranean countries using international indexes for a cross-border comparison of water availability specifically for fresh water supply for municipal and industrial applications. Wastewater reuse criteria based on necessary, application specific, treatment output quality are presented. Data for each individual country is reviewed, and the regulations governing each country around reuse and applications are summarized, focusing, when appropriate, on the production and use of reclaimed wastewater for municipal and industrial applications. Also a critical overview of the guidelines and regulations governing these countries is presented. After considering multiple parameters associated with adoption of municipal and industrial wastewater reuse, such as water supply and scarcity, country and regional parameters, as well as possible applications, we note that adoption is accelerated in countries that have stronger economies and higher water needs. This development is fueled by favorable guidelines and regulations; conversely it is hindered by prohibitive guidelines and regulations. Wastewater reuse for municipal and industrial applications so far remains a whimsical game of culture, perception, religion, available technology and politics. An increasing trend in wastewater treatment plant construction and planning is seen in almost all the countries of the Mediterranean region. In addition, reuse water standards are in the process of being developed in a way that will clearly take into account the local conditions while reasonably safeguarding the public health. Wastewater reuse for municipal and industrial applications in Mediterranean countries remains at the beginning stages of adoption and the potential for improvement is open.

Advanced Treatment of Municipal Wastewater Effluent by Coagulation/Sedimentation and Chlorine Dioxide Disinfection

2011 ◽  
Vol 71-78 ◽  
pp. 2792-2796
Author(s):  
Li Hua Cheng ◽  
Ai Hua He ◽  
Xue Jun Bi ◽  
Qi Wang
Keyword(s):  
Chlorine Dioxide ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Treatment Plant ◽  
Secondary Effluent ◽  
Tertiary Treatment ◽  
Combination Process ◽  
E Coli ◽  
Chlorine Dioxide Disinfection ◽  
Selection Of

Due to increasing water scarcity, reclamation and reuse of the secondary effluent of wastewater treatment plant are widely concerned in many countries. Before reuse, the residual contaminant in the secondary effluent should be further removed to guarantee safe reuse. Coagulation/sedimentation and subsequent chlorine dioxide(ClO2) disinfection was adopted for tertiary treatment of secondary effluent. Selection of coagulant and optimization of tertiary treatment parameters were performed in this study. The results showed that coagulation could remove turbidity and total phosphours(TP) effectively. Polyaluminium chloride(PAC) was the most suitable coagulant. The optimal coagulation condition was as follows: PAC dosage of 10mg/L(measured as Al3+), reaction time of 20 min, settling time of 40 min, in this case, the average removal rate of turbidity, color, UV254, TP and TOC could reach to 58.2%, 22.8%, 18.2%, 60.6% and 22.2%, respectively. ClO2could inactive bacteria andE. colieffectively. ClO2could further remove UV254, color and TOC. In case of ClO2dosage of 5mg/L, the sterilization efficiency could reach 100%, and the removal rate of UV254, color and TOC was higher than 25%, 70% and 25%, respectively. In the optimal condition, the removal efficiency of residual contaminant by the combination process was as follows: UV254of 45.9%, color of 76.5%, TOC of 66.7%, turbidity of 61.9% and TP of 96.3%.

Sign in / Sign up

Export Citation Format

Share Document