Discfiltration and ozonation for reduction of nutrients and organic micro-pollutants from wastewater – a pilot study

2014 ◽  
Vol 9 (4) ◽  
pp. 475-482 ◽  
Author(s):  
J. Väänänen ◽  
F. Nilsson ◽  
J. la Cour Jansen ◽  
M. Hörsing ◽  
M. Hagman ◽  
...  
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Active Material ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Secondary Effluent ◽  
Effluent Water ◽  
Ozone Dose ◽  
Pollutants Removal ◽  
Micro Pollutants

The combination of coagulation/flocculation and discfiltration with ozonation to reduce nutrients and organic micro-pollutants in secondary effluent was studied in pilot scale at Lundåkraverket wastewater treatment plant in Landskrona, Sweden. With a chemical dose of 4 gAl3+/m3 and 1.5 g/m3 cationic polymer as active material effluent water quality with regards to total phosphorous (Tot-P), suspended solids and turbidity were 0.03, 2 mg/l and 0.5 Nephelometric Turbidity Units (NTU) in average. The effluent water quality was similar whether ozonation with an applied ozone dose of 2–9 gO3/m3 was performed prior to or after coagulation/flocculation/discfiltration. The results were corresponding to removal efficiencies for the coagulation/flocculation/discfiltration process of 94, 74 and 85% for Tot-P, suspended solids and turbidity, respectively. For organic micro-pollutants removal, it was found to be beneficial to perform coagulation/flocculation/discfiltration prior to ozonation as the ozone requirements were lowered for the dosing intervals applied. The removal was in the range of 38–98% depending on process configuration and ozone dose.

Experiment of Polyester Wastewater Treatment by Aerobic Membrane Bioreactor and an Engineering Application

2012 ◽  
Vol 518-523 ◽  
pp. 2130-2137
Author(s):  
Si Hao Lv ◽  
Hui Chang ◽  
Zhi Hui Liang ◽  
Yan Yan Zeng ◽  
Hong Bo Fan
Keyword(s):  
Water Quality ◽  
Pilot Study ◽  
Membrane Bioreactor ◽  
Suspended Solids ◽  
Loading Rate ◽  
Engineering Application ◽  
Full Scale ◽  
Effluent Water ◽  
Small Influence ◽  
Volumetric Loading

A pilot study was carried out to evaluate the application of aerobic submerged MBR in treating polyester wastewater and a full scale system in which MBR was adopted as the key aspect was put forward to treat the polyester wastewater of Zhuhai Yuhua Polyester co., Ltd., China. The pilot study revealed that HRT could be affected by the influent COD, and a HRT larger than 36h was proposed for treating polyester wastewater by MBR. Volumetric loading rate and sludge loading rate ranged in 0.7-2.0 kgCOD/m3•d and 0.09~0.24 kgCOD/ kgMLSS•d respectively were of small influence on the COD removal. DO in the range of 2.5-4.0 mg/L seemed to be optimal for avoiding limitations due to oxygen concentration and creating an effective turbulence. The modified full scale system which includes anaerobic digesting tank and MBR followed by a stabilization pond was verified to be effective to treat the polyester wastewater in the latest two years. The results illustrated that the effluent water quality could meet the discharge limits of water pollutants (DB 44/26-2001) which was established in Guangdong, China. Observed sludge yield of the system fluctuated between 0.10-0.18 gMLSS/gCOD and averaged at 0.137 gMLSS/gCOD. The membrane permeate at around 10 L/m2h, TMP of less than 0.7bar, and total mixed liquor suspended solids (MLSS) between 6-7g/L were suitable to operate the MBR.

Antimicrobial resistance of fecal indicators in disinfected wastewater

2011 ◽  
Vol 64 (12) ◽  
pp. 2352-2361 ◽  
Author(s):  
A. Luczkiewicz ◽  
K. Jankowska ◽  
R. Bray ◽  
E. Kulbat ◽  
B. Quant ◽  
...  
Keyword(s):  
Antimicrobial Agents ◽  
Treatment Plant ◽  
Tetracycline Resistance ◽  
Pilot Scale ◽  
Resistant Bacteria ◽  
Secondary Effluent ◽  
Fecal Indicators ◽  
Extended Spectrum Beta Lactamase ◽  
E Coli ◽  
Operation Conditions

The main objective of the study was to assess the potential of three systems (UV irradiation, ozonation, and micro/ultrafiltration) operated in a pilot scale in removal of antimicrobial-resistant fecal bacteria from secondary effluent of the local wastewater treatment plant (700,000 population equivalent). The effectiveness of the processes was analysed using the removal ratio of fecal indicators (Escherichia coli and Enterococcus spp.). The susceptibility of fecal indicators to antimicrobial agents important in human therapy was examined. Resistance to nitrofurantoin and erythromycin was common among enterococci and followed by resistance to fluoroquinolones and tetracycline. Resistance to high-level aminoglycosides and glycopeptides was also observed. E. coli isolates were most frequently resistant to penicillins and tetracycline. The extended-spectrum beta-lactamase-producing E. coli was detected once, after ozonation. Substantial attention should be paid to the E. coli and enterococci resistant to three or more chemical classes of antimicrobials (MAR), which in general constituted up to 15 and 49% of the tested isolates, respectively. Although the applied methods were effective in elimination of fecal indicators (removal efficiency up to 99.99%), special attention has to be paid to the application of sufficient disinfection and operation conditions to avoid selection of antimicrobial resistant bacteria.

scholarly journals Microplastics Removal from Treated Wastewater by a Biofilter

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1085 ◽  
Author(s):  
Fan Liu ◽  
Nadia Nord ◽  
Kai Bester ◽  
Jes Vollertsen
Keyword(s):  
Particle Number ◽  
Treatment Plant ◽  
Complete Removal ◽  
Pilot Scale ◽  
Particle Mass ◽  
Treated Wastewater ◽  
Secondary Effluent ◽  
Global Environmental Issue ◽  
Wwtp Effluent ◽  
Global Environmental

Microplastic (MP) pollution is a global environmental issue, and traditionally treated wastewater has been identified as a source of land-based microplastics into the aquatic environment. This study evaluated the performance of a pilot-scale biofilter to polish wastewater treatment plant (WWTP) effluent before it enters the environment. The filter was divided into four zones, allowing the concentration of microplastics to be followed through the filter. It was fed with secondary effluent from a conventional WWTP in Denmark. The raw effluent from the WWTP contained 917 items m−3 which corresponded to a mass concentration of 24.8 µg m−3. After the top layer of the biofilter, the concentration had decreased to a median value of 197 item m−3 and 2.8 µg m−3, indicating an overall removal efficiency of 79% in terms of particle number and 89% in terms of particle mass. We also observed a tendency that MP of larger size and higher particle mass were more likely to be retained. After the last filtration zone, all MP larger than 100 µm had been removed. The results of this study demonstrate that biofilters are able to lower the MP abundance in treated wastewater significantly, but a complete removal is not ensured, hence some MP, particularly small-sized ones, can still be discharged into the receiving environment.

Chemical monitoring strategy for the assessment of advanced water treatment plant performance

2010 ◽  
Vol 10 (6) ◽  
pp. 961-968 ◽  
Author(s):  
J. E. Drewes ◽  
J. A. McDonald ◽  
T. Trinh ◽  
M. V. Storey ◽  
S. J. Khan
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Reverse Osmosis ◽  
Pilot Plant ◽  
Monitoring Program ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Pilot Scale ◽  
Chemical Monitoring ◽  
Plant Operation

A pilot-scale plant was employed to validate the performance of a proposed full-scale advanced water treatment plant (AWTP) in Sydney, Australia. The primary aim of this study was to develop a chemical monitoring program that can demonstrate proper plant operation resulting in the removal of priority chemical constituents in the product water. The feed water quality to the pilot plant was tertiary-treated effluent from a wastewater treatment plant. The unit processes of the AWTP were comprised of an integrated membrane system (ultrafiltration, reverse osmosis) followed by final chlorination generating a water quality that does not present a source of human or environmental health concern. The chemical monitoring program was undertaken over 6 weeks during pilot plant operation and involved the quantitative analysis of pharmaceuticals and personal care products, steroidal hormones, industrial chemicals, pesticides, N-nitrosamines and halomethanes. The first phase consisted of baseline monitoring of target compounds to quantify influent concentrations in feed waters to the plant. This was followed by a period of validation monitoring utilising indicator chemicals and surrogate measures suitable to assess proper process performance at various stages of the AWTP. This effort was supported by challenge testing experiments to further validate removal of a series of indicator chemicals by reverse osmosis. This pilot-scale study demonstrated a simplified analytical approach that can be employed to assure proper operation of advanced water treatment processes and the absence of trace organic chemicals.

Study on Pharmaceutical Wastewater by SBBR

2013 ◽  
Vol 295-298 ◽  
pp. 1380-1383
Author(s):  
Lei Zhu ◽  
Song Liu ◽  
Xun Wang ◽  
Hong Jiao Song
Keyword(s):  
Water Quality ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Quality Standards ◽  
Raw Water ◽  
Effluent Water ◽  
Pharmaceutical Wastewater ◽  
Wastewater Quality ◽  
Quality Indexes

A pharmaceutical factory in Wuhan produces many pharmaceutical wastewaters every day. The wastewater raw water quality indexes are: the concentration of COD,BOD5, NH3-N,TP is 300,000mg/L, 200,000mg/L, 450mg/L,900 mg/L ; By the SBBR treatment, the effluent water quality indexes are:750mg/L,350mg/L,1.20mg/L,5mg/L,and the effluent water can accord with Wastewater quality standards for discharge to municipal sewers (CJ 343-2010) and be discharged after treatment in the sewage treatment plant by municipal sewers.

scholarly journals Effect of O3 Dose on the O3/UV Treatment Process for the Removal of Pharmaceuticals and Personal Care Products in Secondary Effluent

2019 ◽  
Vol 3 (2) ◽  
pp. 53 ◽  
Author(s):  
N. Evelin Paucar ◽  
IIho Kim ◽  
Hiroaki Tanaka ◽  
Chikashi Sato
Keyword(s):  
Municipal Wastewater ◽  
Treatment Process ◽  
Limit Of Detection ◽  
Personal Care Products ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Personal Care ◽  
Uv Treatment

A municipal wastewater treatment plant (WWTP) is a melting pot of numerous pharmaceuticals and personal care products (PPCPs) together with many other substances. The removal of PPCPs using advanced oxidation processes within a WWTP is one way to reduce the amount of PPCPs that potentially enter an aquatic environment. The aim of this study was to examine the effectiveness of the ozone (O3)/UV treatment process, especially, the effects of O3 dose and reaction time, on the removal of PPCPs in the secondary effluent of a WWTP. Experiments were conducted using a pilot-scale treatment process that consisted of two flow-through reactors connected in series. Each reactor was equipped with three 65 W lamps (UV65W). The experimental variables were ozone dosage (1, 2, 3, 4, and 6 mg L−1) and hydraulic retention time (HRT; 5 and 10 min). On the basis of the PPCP concentrations after O3/UV65W treatment and their limit of detection (LOD), 38 PPCPs detected in the secondary effluent were classified into 5 groups ranging from the category of “sensitive” to O3/UV65W or “unstable” in the O3/UV65W process to the category of “insensitive” to O3/UV65W or “very stable” in the O3/UV65W process.

Investigation of potential surrogate organisms and public health risk in UV irradiated secondary effluent

2003 ◽  
Vol 47 (9) ◽  
pp. 37-43 ◽  
Author(s):  
D. Simpson ◽  
J. Jacangelo ◽  
P. Loughran ◽  
C. McIlroy
Keyword(s):  
Public Health ◽  
Health Risk ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Acceptable Level ◽  
Uv Disinfection ◽  
Secondary Effluent ◽  
Indicator Organism ◽  
Indicator Organisms ◽  
Public Health Risk

Watercare's Mangere Wastewater Treatment Plant in Auckland, New Zealand treats sewage from a population equivalent of approximately 1,000,000. The treatment plant is currently undergoing a major upgrade, and as a part of this upgrade the largest UV disinfection plant in the world (at the time of award of the contract) is being constructed. Pilot scale investigations were undertaken at a purpose built facility. The pilot plant employed secondary treatment, sand filtration, UV disinfection and a number of low pressure membrane systems. Investigations at the facility focussed on attempting to identify relationships between potential surrogate indicator organisms (including enterococci, faecal coliforms, Clostridium perfringens spores and F-specific bacteriophage) and pathogenic organisms (including culturable human enteric viruses, bacterial pathogens and parasites). The aim of the study was to identify a suitable indicator organism and an associated effluent concentration that would ensure that an acceptable level of public health risk was maintained in the environment. The results showed that no suitable surrogate indicator organism could be found. However the results did indicate that a two tiered operating strategy, based on the concentration of enteroviruses present in raw sewage and an appropriate UV dose, would ensure that an acceptable level of public health risk was maintained in the environment.

scholarly journals Chemometric Assessment of Bulgarian Wastewater Treatment Plants’ Effluents

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4408
Author(s):  
Galina Yotova ◽  
Tony Venelinov ◽  
Stefan Tsakovski
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Surface Water ◽  
Suspended Solids ◽  
Treatment Plant ◽  
Surface Water Quality ◽  
Anthropogenic Sources ◽  
Multivariate Curve Resolution ◽  
Anthropogenic Activity ◽  
Wwtp Effluent

Surface water quality strongly depends on anthropogenic activity. Among the main anthropogenic sources of this activity are the wastewater treatment plant (WWTP) effluents. The discharged loads of nutrients and suspended solids could provoke serious problems for receiving water bodies and significantly alter the surface water quality. This study presents inventory analysis and chemometric assessment of WWTP effluents based on the mandatory monitoring data. The comparison between the Bulgarian WWTPs and previously reported data from other countries reveals that discharged loads from investigated WWTPs are lower. This is particularly valid for total suspended solids (TSS). The low TSS loads are the reason for the deviations of the typical calculated WWTP effluent ratios of Bulgarian WWTPs compared to the WWTPs worldwide. The performed multivariate analysis reveals the hidden factors that determine the content of WWTP effluents. The source apportioning based on multivariate curve resolution analysis provides detailed information for source contribution profiles of the investigated WWTP effluent loads and elucidate the difference between WWTPs included in this study.

Comparing heterotrophic and hydrogen-based autotrophic denitrification reactors for effluent water quality and post-treatment

2012 ◽  
Vol 12 (2) ◽  
pp. 227-233 ◽  
Author(s):  
Youneng Tang ◽  
Michal Ziv-El ◽  
Kerry Meyer ◽  
Chen Zhou ◽  
Jung Hun Shin ◽  
...  
Keyword(s):  
Water Quality ◽  
Packed Bed ◽  
Pilot Scale ◽  
Post Treatment ◽  
Biofilm Reactor ◽  
Effluent Water ◽  
Membrane Biofilm Reactor ◽  
Plate Counts ◽  
Biodegradable Dissolved Organic Carbon ◽  
The Impact

This work compares a pilot-scale H2-based membrane biofilm reactor (MBfR) and a pilot-scale packed-bed heterotrophic reactor (PBHR) for denitrification of nitrate-contaminated groundwater. The comparison includes the effluent water quality of the denitrification reactors (NO3−, NO2−, dissolved oxygen, SO42−, (biodegradable) dissolved organic carbon, heterotrophic plate counts (HPC), turbidity, NH4+, and pH), and the impact of post-treatment on water quality. At the same nitrate carrier-surface loading, effluent water quality was generally better directly from the MBfR than from the PBHR. However, post treatment including an ozone-contact tank and a post-filter brought the finished-water quality for both systems to roughly the same level, which met all drinking water standards except for HPC.

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