scholarly journals Application of UV absorbance and electron-donating capacity as surrogates for micropollutant abatement during full-scale ozonation of secondary-treated wastewater

2021 ◽  
pp. 117858
Author(s):  
Nicolas Walpen ◽  
Adriano Joss ◽  
Urs von Gunten
Keyword(s):  
Full Scale ◽  
Treated Wastewater ◽  
Uv Absorbance

Contamination level of four priority phthalates in North Indian wastewater treatment plants and their fate in sequencing batch reactor systems

2016 ◽  
Vol 18 (3) ◽  
pp. 406-416 ◽  
Author(s):  
Khalid Muzamil Gani ◽  
Ankur Rajpal ◽  
Absar Ahmad Kazmi
Keyword(s):  
Wastewater Treatment ◽  
Sequencing Batch Reactor ◽  
Wastewater Treatment Plants ◽  
Batch Reactor ◽  
Full Scale ◽  
Treated Wastewater ◽  
Contamination Level

The contamination level of four phthalates in untreated and treated wastewater of fifteen wastewater treatment plants (WWTPs) and their fate in a full scale sequencing batch reactor (SBR) based WWTP was evaluated in this study.

Enhanced biological treatment of a residual oil processing plant wastewater by a membrane-bioreactor for effluent quality improvement in a Hungarian refinery

2009 ◽  
Vol 4 (1) ◽  
Author(s):  
I. Keresztényi ◽  
G. Kicsi ◽  
Cs. Dobolyi ◽  
Gy. Isaák
Keyword(s):  
Quality Improvement ◽  
Performance Test ◽  
Wastewater Reuse ◽  
Biomass Concentration ◽  
Full Scale ◽  
Treated Wastewater ◽  
Organic Loading Rate ◽  
Processing Plant ◽  
Dissolved Air Flotation ◽  
Treated Wastewater Reuse

A 160-day-long preliminary laboratory scale MBR treatment study and the performance test of a new 480 m3/day capacity full scale plant for quality improvement of effluent from a bitumen plant off-gas scrubbing followed by dissolved air flotation were conducted. Two testing periods were distinguished during the laboratory study, specifically the first with 100 days SRT and the second with 50 days SRT. To evaluate the possibility of the organic matter removal enhancement at the end of each testing period powdered activated carbon (PAC) treatment was carried out. The COD and oil & grease removal efficiency of the well acclimated MBR sludge was greater than 90% and 98%, respectively. The COD content of the treated wastewater during the full scale performance test period was reduced below 100 mg·L−1. To ensure an optimal treatment process, the organic loading rate should be kept in 1.5 – 3 kg COD m−3 d−1 range. and optimal biomass concentration of 10-15 g·L−1 should be ensured to reduce the cleaning frequency of the membrane ultrafilters. To avoid exceedance of compliance with respect to the discharge criteria, further treatment step(s) should be considered prior to any treated wastewater reuse.

Disinfection of tertiary wastewater effluent prior to river discharge using peracetic acid; treatment efficiency and results on by-products formed in full scale tests

2013 ◽  
Vol 68 (8) ◽  
pp. 1852-1856 ◽  
Author(s):  
Per Overgaard Pedersen ◽  
Erling Brodersen ◽  
David Cecil
Keyword(s):  
Peracetic Acid ◽  
Full Scale ◽  
Treated Wastewater ◽  
Decomposition Products ◽  
Sand Filter ◽  
E Coli ◽  
Log Reduction ◽  
Before And After ◽  
Full Scale Tests ◽  
P Removal

This is an investigation of chemical disinfection, with peracetic acid (PAA), in a tertiary sand filter at a full scale activated sludge plant with nitrification/denitrification and P-removal. The reduction efficiency of Escherichia coli and intestinal enterococci in the sand filter is reported. E. coli log reductions of between 0.4 and 2.2 were found with contact times from 6 to 37 min and with dosing from 0 to 4.8 mg L−1. The average log reduction was 1.3. The decomposition products, bromophenols, chlorophenols and formaldehyde and residual H2O2 were measured before and after the sand filter. The residual H2O2 concentration in the effluent was critical at short contact times and high dosages of PAA due to the discharge limit of 25 μg L−1. The other three products could not be detected at 0.1 μg L−1 levels. The chemical cost of PAA dosing is estimated to be 0.039 US$ m−3 treated wastewater.

Full-scale applications for both COD and nutrient removal in a CIRCOX® airlift reactor

2007 ◽  
Vol 55 (8-9) ◽  
pp. 107-114 ◽  
Author(s):  
C.T.M.J. Frijters ◽  
M. Silvius ◽  
J. Fischer ◽  
R. Haarhuis ◽  
R. Mulder
Keyword(s):  
Nitrogen Removal ◽  
Ammonia Removal ◽  
Full Scale ◽  
Airlift Reactor ◽  
Treated Wastewater ◽  
Reactor Technology ◽  
First Case ◽  
Biological Performance ◽  
Biofilm Development ◽  
Anammox Process

The airlift reactor technology has been successfully applied at full scale for both COD and nitrogen removal. In this study, the results of the biofilm development and biological performance of two full scale reactors are discussed. At Paulaner Brewery in Munich, the airlift reactor was applied for COD and ammonia removal of anaerobically treated wastewater. In the other case the airlift reactor was applied as a pretreatment of nitrogen removal by the Anammox process. Water from a Tannery company in Lichtenvoorde in the Netherlands, The Hulshof Royal Dutch Tanneries, was pretreated anaerobically for COD removal and aerobically to remove the sulphides as sulphur. In an airlift reactor the ammonia was partially oxidised to nitrite. In both cases the granular biomass developed well; the concentrations amounted to 250 ml/L and 500 ml/L respectively. In the first case, 4 kg/m3/day of COD was removed, the soluble concentration of COD was less than 250 mg/L. The nitrification to nitrate was nearly complete and amounted to 0.5 kg NH4-N/m3/day. In the second application, 50% of the ammonia (on average 0.45 kg N/m3/d) was nitrified to nitrite. This process was easily controlled by regulating the amount of air according to the nitrite and ammonia concentrations in the effluent. It can be concluded that in both cases the particular processes were very stable and easy to operate.

Sewage reuse for aquaculture after treatment in oxidation and duckweed pond

2007 ◽  
Vol 55 (11) ◽  
pp. 173-181 ◽  
Author(s):  
M.M. Ghangrekar ◽  
N. Kishor ◽  
A. Mitra
Keyword(s):  
Operating Cost ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Full Scale ◽  
Treated Wastewater ◽  
Uasb Reactor ◽  
Oxidation Pond ◽  
Treated Sewage ◽  
Natural Treatment ◽  
Duckweed Pond

The benefits of treating sewage by pond systems offer, through a simple and low-cost technology, social and commercial benefits, from the waste raw materials. The objective of this work was to demonstrate an effective treatment of the sewage by using natural treatment systems, and use of treated wastewater for aquaculture. The study was conducted for the sewage generated from the IIT Kharagpur campus. After characterization of the sewage, laboratory scale experiments were conducted for treatment using oxidation pond and duckweed pond. Survival and growth of fishes were observed in the experimental ponds using treated sewage. Based on the experimental results, full-scale treatment plant was designed to meet the aquaculture water quality. From the economics of the proposed full-scale plant, and utilization of the treated sewage for aquaculture, it is estimated that, the amount of Rs. 20,0000 can be generated every year. This amount recovered from the aquaculture will be more than the operating cost of the treatment plant, hence, making the operation of sewage treatment plant self sufficient. Use of a UASB reactor as the first stage treatment before sewage passes to the oxidation pond, can be a more attractive alternative because of less land requirement as compared to the oxidation pond alone, and additional land can be made available for aquaculture to increase revenue.

Ultraviolet Disinfection of Secondary Wastewater

1983 ◽  
Vol 18 (1) ◽  
pp. 115-128
Author(s):  
Garry Palmateer ◽  
Walter G. Cook ◽  
G. Elliott Whitby ◽  
Jan Maarschalkerweerd ◽  
Doug Huber ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Clostridium Perfringens ◽  
Full Scale ◽  
Fecal Coliforms ◽  
Treated Wastewater ◽  
Uv Disinfection ◽  
Ultraviolet Disinfection ◽  
Chlorine Disinfection ◽  
Pollution Indicator ◽  
Significant Mortality

Abstract A full-scale study involving the disinfection of secondarily treated wastewater with ultraviolet light was initiated to determine the efficacy of an ultraviolet device designed and engineered specifically for this purpose when operated in parallel with chlorine disinfection. Results consistently demonstrated the ability of the UV device to reduce pollution indicator bacterial levels to well below 2500 and 200 total and fecal coliforms, respectively per 100 ml as well as the more disinfectant resistant Clostridium perfringens. In caged fish-toxicity assays, no significant mortality was observed in the stream following UV disinfection; however, within 24 hours 100% mortality resulted from the chlorinated effluents.

Relationships between DBP concentrations and differential UV absorbance in full-scale conditions

2018 ◽  
Vol 131 ◽  
pp. 110-121 ◽  
Author(s):  
Nicolas Beauchamp ◽  
Olivier Laflamme ◽  
Sabrina Simard ◽  
Caetano Dorea ◽  
Geneviève Pelletier ◽  
...  
Keyword(s):  
Full Scale ◽  
Uv Absorbance

Catch basin inserts to reduce pollution from stormwater

2001 ◽  
Vol 44 (7) ◽  
pp. 23-34 ◽  
Author(s):  
S.-L. Lau ◽  
E. Khan ◽  
M. K. Stenstrom
Keyword(s):  
Los Angeles ◽  
The United States ◽  
Full Scale ◽  
Point Sources ◽  
Treated Wastewater ◽  
Oil And Grease ◽  
Santa Monica Bay ◽  
Santa Monica ◽  
Receiving Waters ◽  
Catch Basins

Stormwater contamination represents the largest source of contaminants to many receiving waters in the United States, such as Santa Monica Bay in Los Angeles, California. Point sources to these same waters generally receive secondary or better treatment before they are released, and they are usually discharged through outfalls that diffuse the wastewater plume to prevent it from contacting the shoreline. Stormwaters receive no treatment and reach the receiving waters through a variety of ways, but most enter through catch basins or inserts to storm drains that terminate at the beach or in shallow coastal areas. Under these conditions, the stormwater discharge may have greater impact on the quality and utility of the receiving water than the treated wastewater discharges. One method of reducing pollution is to equip catch basins with an insert that can capture pollutants. A number of commercially available devices exist but few have been evaluated by independent parties in full-scale applications. A series of tests using bench and full-scale devices under both laboratory and field conditions were conducted to evaluate their ability to remove trash and debris, suspended solids and oil and grease in stormwaters. The results presented in the paper should provide a basis for future insert development and application.

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