Effects of different secondary biological treatment processes followed by flocculation and sand-filtration on subsequent DBPs control from sewage treatment plants

2019 ◽  
Vol 211 ◽  
pp. 81-89 ◽  
Author(s):  
Weixiao Qi ◽  
Hua Zhang ◽  
Ruiping Liu ◽  
Huijuan Liu ◽  
Jiuhui Qu
Keyword(s):  
Biological Treatment ◽  
Sewage Treatment ◽  
Sand Filtration ◽  
Sewage Treatment Plants ◽  
Treatment Processes

scholarly journals Distribution and Removal of Pharmaceuticals in Liquid and Solid Phases in the Unit Processes of Sewage Treatment Plants

2020 ◽  
Vol 17 (3) ◽  
pp. 687 ◽  
Author(s):  
Junwon Park ◽  
Changsoo Kim ◽  
Youngmin Hong ◽  
Wonseok Lee ◽  
Hyenmi Chung ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Biological Treatment ◽  
Sewage Treatment ◽  
Biofilm Reactor ◽  
Relative Distribution ◽  
Biological Processes ◽  
Sewage Treatment Plants ◽  
Treatment Processes ◽  
Mass Load ◽  
Removal Efficiencies

In this study, we analyzed 27 pharmaceuticals in liquid and solid phase samples collected from the unit processes of four different sewage treatment plants (STPs) to evaluate their distribution and behavior of the pharmaceuticals. The examination of the relative distributions of various categories of pharmaceuticals in the influent showed that non-steroidal anti-inflammatory drugs (NSAIDs) were the most dominant. While the relative distribution of antibiotics in the influent was not high (i.e., 3%–5%), it increased to 14%–30% in the effluent. In the four STPs, the mass load of the target pharmaceuticals was reduced by 88%–95% mainly in the biological treatment process, whereas the ratio of pharmaceuticals in waste sludge to those in the influent (w/w) was only 2%. In all the STPs, the removal efficiencies for the stimulant caffeine, NSAIDs (acetaminophen, naproxen, and acetylsalicylic acid), and the antibiotic cefradine were high; they were removed mainly by biological processes. Certain compounds, such as the NSAID ketoprofen, contrast agent iopromide, lipid regulator gemfibrozil, and antibiotic sulfamethoxazole, showed varying removal efficiencies depending on the contribution of biodegradation and sludge sorption. In addition, a quantitative meta-analysis was performed to compare the pharmaceutical removal efficiencies of the biological treatment processes in the four STPs, which were a membrane bioreactor (MBR) process, sequencing batch reactor (SBR) process, anaerobic–anoxic–oxic (A2O) process, and moving-bed biofilm reactor (MBBR) process. Among the biological processes, the removal efficiency was in the order of MBR > SBR > A2O > MBBR. Among the tertiary treatment processes investigated, powdered activated carbon showed the highest removal efficiency of 18%–63% for gemfibrozil, ibuprofen, ketoprofen, atenolol, cimetidine, and trimethoprim.

Analysis and occurrence of typical endocrine-disrupting chemicals in three sewage treatment plants

2010 ◽  
Vol 62 (11) ◽  
pp. 2501-2509 ◽  
Author(s):  
L. Y. Wang ◽  
X. H. Zhang ◽  
N. F. Y. Tam
Keyword(s):  
Biological Treatment ◽  
Endocrine Disrupting Chemicals ◽  
Sewage Treatment ◽  
Average Concentration ◽  
Gas Chromatography Mass Spectrometry ◽  
Wet Season ◽  
Physical Treatment ◽  
Sewage Treatment Plants ◽  
Treatment Processes ◽  
Endocrine Disrupting

Seven typical endocrine-disrupting chemicals (EDCs), including bisphenol A (BPA), 4-tert-octylphenol (OP), estrone (E1), estradiol (E2), 17α-estradiol (17α-E2), estriol (E3) and 17α-ethinylestradiol (EE2) in wastewater, were simultaneously determined with gas chromatography–mass spectrometry (GC–MS). Samples, including influents, effluents and wastewater of different unit processes, were taken seasonally from three different sewage treatment plants. The result showed that BPA and EE2 were the two main types of EDCs in all the samples. The average concentration of BPA were in the range of 268.1–2,588.5 ng l−1 in influents and 34.0–3,099.6 ng l−1 in effluents, while EE2 ranging from 133.1 to 403.2 ng l−1 and from 35.3 to 269.1 ng l−1, respectively. Seasonal change of EDCs levels in effluents was obvious between wet season and dry season. Besides, BPA and E3 could be effectively removed by the biological treatment processes (oxidation ditch and A2/O) with the unit removal of 64–91% and 63–100% for each compound, while other five EDCs had moderate or low removal rates. The study also proved that physical treatment processes, including screening, primary sedimentation and pure aeration, had no or little effect on EDCs removal.

scholarly journals Occurrence and Sources of Synthetic Musk Fragrances in the Sewage Treatment Plants and the Han River in Seoul, Korea

2020 ◽  
Author(s):  
Ju-Hee Hong ◽  
Jun-Yeon Lee ◽  
Hyun-Ju Ha ◽  
Jin-Hyo Lee ◽  
Seok-Ryul Oh ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Synthetic Musk ◽  
Han River ◽  
Treatment Processes ◽  
Musk Fragrances ◽  
Receiving Water

Levels of synthetic musk fragrances (SMFs) and various personal care products (PCPs) were measured in the Han River and its tributaries in Seoul, Korea. The most abundant SMF in all river and PCP samples was 4,6,6,7,8,8-hexamethyl-1,3,4,7-tetrahydrocyclopenta[g]isochromene (HHCB), followed by 1-(3,5,5,6,8,8-hexamethyl-6,7-dihydronaphthalen-2-yl)ethanone (AHTN), musk ketone (MK), and 1,1,2,3,3-pentamethyl-2,5,6,7-tetrahydroinden-4-one (DPMI). There was a significant correlation between the SMF concentration in the PCPs and the Han River samples. Moving from upstream to downstream in the Han River, the median SMF concentration was 6.756, 2.945, 0.304, and 0.141 μg/L in the sewage treatment plant (STP) influent, effluent, tributaries, and mainstream, respectively, implying that effective SMF removal was achieved during the sewage treatment process, followed by dilution in the receiving water. Four STPs using advanced biological treatment processes had removal efficiencies of 55.8%, 50.6%, 43.3% for HHCB, AHTN, and MK, respectively. The highest SMF concentrations in the tributaries were observed at locations close to the STPs. Our study confirmed that the main source of SMFs in the receiving water were sewage effluent containing untreated SMFs, which are largely originated from household PCPs, especially hair care products (e.g., shampoo) and perfumes.

Biological Waste Water Rehabilitation of Sugar Factories by Algocoenosis Correction

2017 ◽  
Vol 21 (3) ◽  
pp. 16-20 ◽  
Author(s):  
V.V. Kul’nev ◽  
V.I. Stupin ◽  
A.A. Borzenkov
Keyword(s):  
Waste Water ◽  
Biological Treatment ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Domestic Sewage ◽  
Total Water ◽  
Sewage Treatment Plants ◽  
Total Water Consumption

The article deals with theoretical and practical aspects of biological waste water rehabilitation of sugar factories by algocoenosis correction. This technology allows you to transfer domestic sewage treatment plant of filtration mode fields in the biological treatment ponds mode, significantly reducing the area of sewage treatment plants, thus improving the quality of treated waste water, which will, in turn, use them repeatedly reducing total water consumption.

scholarly journals Biodegradation of Sewage Wastewater Using Autochthonous Bacteria

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Purnima Dhall ◽  
Rita Kumar ◽  
Anil Kumar
Keyword(s):  
Biological Treatment ◽  
Suspended Solids ◽  
Bacillus Pumilus ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Total Suspended Solids ◽  
Inoculum Size ◽  
Sewage Treatment Plants ◽  
Treatment Facilities ◽  
Autochthonous Bacteria

The performance of isolated designed consortia comprisingBacillus pumilus, Brevibacterium sp, and Pseudomonas aeruginosafor the treatment of sewage wastewater in terms of reduction in COD (chemical oxygen demand), BOD (biochemical oxygen demand) MLSS (mixed liquor suspended solids), and TSS (total suspended solids) was studied. Different parameters were optimized (inoculum size, agitation, and temperature) to achieve effective results in less period of time. The results obtained indicated that consortium in the ratio of 1 : 2 (effluent : biomass) at 200 rpm, 35°C is capable of effectively reducing the pollutional load of the sewage wastewaters, in terms of COD, BOD, TSS, and MLSS within the desired discharge limits, that is, 32 mg/L, 8 mg/L, 162 mg/L, and 190 mg/L. The use of such specific consortia can overcome the inefficiencies of the conventional biological treatment facilities currently operational in sewage treatment plants.

Spatial and seasonal distribution of synthetic musks in sewage treatment plants of Shanghai, China

2012 ◽  
Vol 66 (1) ◽  
pp. 201-209 ◽  
Author(s):  
Wenjing Sang ◽  
Yalei Zhang ◽  
Xuefei Zhou ◽  
T. C. Zhang
Keyword(s):  
Sewage Treatment ◽  
Seasonal Distribution ◽  
Emerging Contaminant ◽  
Sewage Treatment Plants ◽  
Synthetic Musks ◽  
Treatment Processes ◽  
Usage Patterns ◽  
Different Seasons ◽  
Musk Xylene ◽  
Positive Correlations

As one kind of emerging contaminant, synthetic musks (SMs) are commonly used in varying amounts in many personal care products and have been detected in different environmental systems. Occurrence and fate of four common SMs [galaxolide (HHCB), tonalide (AHTN), musk xylene (MX) and musk ketone (MK)] were studied in different sewage treatment plants (STPs) of Shanghai, China among different seasons. Results showed that total dissolved concentrations of the four SMs were 536–3,173 ng/L in influent, 351–2,595 ng/L in effluent and 147–6,839 μg/kg dry weights in sludge. The SM concentrations varied with input sources, STP treatment processes, usage patterns, and different seasons or surveyed years of consumption. There was no significant removal of SMs in most of the sewage samples of the four STPs. Significant positive correlations were observed between concentrations of HHCB and AHTN (R2 = 0.9062, n = 12, p< 0.05), HHCB and MK (R2 = 0.7471, n = 8, p< 0.05), as well as AHTN and MK (R2 = 0.9321, n = 8, p< 0.05) in sludge samples.

scholarly journals Hydrodynamic and water quality modelling of Southern Evoikos Gulf, Greece

2013 ◽  
Vol 1 (2) ◽  
pp. 131-141
Keyword(s):  
Water Quality ◽  
Biological Treatment ◽  
Sewage Treatment ◽  
Water Quality Modelling ◽  
Sewage Treatment Plants ◽  
N Removal ◽  
Limiting Nutrient ◽  
Total Capacity ◽  
P Removal

A mathematical model is presented, consisting of a two-layer, finite difference hydrodynamic submodel and a compartmental water quality sub-model. The model is calibrated with field data. Then, it is applied to Southern Evoikos Gulf, an open coastal water body of particular ecological significance in the region of Attiki, in Greece. The application of the model aims at assessing the effect of three alternative treatment scenarios (i.e. biological treatment, biological treatment with N removal and biological treatment with N and P removal) performed in four sewage treatment plants (of a total capacity of 1,000,000 equivalent population) on the water quality of the Gulf. The calculations show that N is the limiting nutrient and its removal results in an improvement of the quality of the recipient, whereas the additional implementation of P removal has a rather limited impact.

CONDITION OF PRIMARY PRODUCERS COMMUNITIES IN THE AREA OF THE CITY OF UFA WASTEWATER BIOLOGICAL TREATMENT PLANTS’ DISCHARGE

2012 ◽  
Vol 2 (3) ◽  
pp. 59-64
Author(s):  
E. S KAREVA ◽  
G. A GULAMANOVA
Keyword(s):  
Biological Treatment ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Organic Pollution ◽  
Ecological Condition ◽  
Ecosystem Structure ◽  
Sewage Treatment Plants ◽  
Quantitative Characteristics ◽  
The City ◽  
Wastewater Biological Treatment

Prediction and assessment of ecological condition of watercourse receiving wastewater can be made with the use of a variety of methods including hydrobiological and some others.The article describes the study of wastewater effects on the degree of phytoplankton growing in the area within 500m up and down the Belaya River from the city wastewater treatment plant and Demsk sewage treatment plants of Ufa. Basic structural and quantitative characteristics of autotrophic plankton are analyzed. The degree of organic pollution according to indicator groups is identified. The estimation of one of the basic components of aquatic ecosystem structure is given.

New type of sludge density meter using microwaves for application in sewage treatment plants

1996 ◽  
Vol 33 (1) ◽  
pp. 53-60
Author(s):  
Seiji Yamaguchi
Keyword(s):  
Phase Difference ◽  
Sewage Treatment ◽  
Field Tests ◽  
Measuring Method ◽  
Microwave Measurement ◽  
Sewage Treatment Plants ◽  
Practical Applications ◽  
Treatment Processes ◽  
Wide Range ◽  
New Type

Sludge density is an important index for the control of sewage and sludge treatment processes. A new measuring method for sludge density, the microwave phase difference method, has been tested with a good correlation between density and phase difference. Comparison tests with conventional ultrasonic density meters have shown characteristics that are superior to the flow-through type and equivalent to the defoaming type. We developed a sludge density meter that uses this method and made long-term field tests on the sludge pipelines in sewage treatment plants. Results demonstrated a good correlation with the values that were obtained by manual analysis, with excellent linearity from low density of less than 1% to high density of about 30%. This new microwave measurement method is less affected by soil build-up and air bubbles, is able to measure a wide range of densities from low to high, and is capable of continuous measurement. It is a highly reliable measuring method for practical applications.

Behaviour of nonylphenol ethoxylates in sewage treatment plants in Japan – biotransformation and ecotoxicity

2000 ◽  
Vol 42 (7-8) ◽  
pp. 23-30 ◽  
Author(s):  
M. Fujita ◽  
M. Ike ◽  
K. Mori ◽  
H. Kaku ◽  
Y. Sakaguchi ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Estrogenic Activity ◽  
Sewage Treatment ◽  
Secondary Effluent ◽  
Nonylphenol Ethoxylates ◽  
Sewage Treatment Plants ◽  
Metabolic Intermediates ◽  
Average Value ◽  
Final Effluent ◽  
By Products

Behavior of nonylphenol polyethoxylates (NPnEOs, n; number of ethoxy units) in 40 full-scale sewage treatment plants (STPs) in Japan was studied. Primary effluent (PE), secondary effluent (SE) and final effluent (FE) samples were collected from the STPs, and NPnEOs, their metabolic intermediates and related halogenated derivatives were quantitatively analyzed. Parent NPnEOs (n=4–18) were detected at concentrations between 5.1 and 1035 μg/l with the average value of 296 μg/l in the PEs from all the STPs, indicating widespread pollution of NPnEOs in Japan. The analyses of SEs revealed that normal biological treatment can relatively efficiently remove NPnEOs, however, the biotransformation led to the formation of biologically-refractory metabolites like nonylphenol (NP), NPnEOs with shorter ethoxy chains (n=1–3; NP1-3EO) and nonylphenol carboxylic acids (NP1-3EC). Halogenated (chlorinated or brominated) NPnEOs and/or NPnECs (n=1–2), which are considered to be produced as by-products during the disinfection processes using chlorination, were also found in SEs and/or FEs from 25 STPs. The ecotoxicity assays showed that the metabolic intermediates of NPnEOs possess higher acute toxicity against Daphnia magna and estrogenic activity than the parent surfactant NPnEOs.

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