scholarly journals Experience in using phyto-structures for tertiary treatment of urban wastewater

2021 ◽  
Vol 937 (4) ◽  
pp. 042056
Author(s):  
Lidia Dolzhenko ◽  
Natalia Yudina

Abstract This paper considers the experimental biocenosis development for tertiary wastewater treatment with respect to the climate features of South of Russia. The plant species with advantaged biotechnical characteristics that acceptable for steppe environment are described. The growing season productivity of the highest aquatic vegetation for the phyto-structures first year exploitation is determined. The quantitative statistics for indicative microorganism populations is calculated. The data obtained allows to measure the ecological effectiveness of wastewater treating phyto-system and to develop a cheap and recyclable biocenosis for the inhabited localities with temperate continental climate.

2002 ◽  
Vol 36 (9) ◽  
pp. 2101-2106 ◽  
Author(s):  
Nathalie Vaillant ◽  
Fabien Monnet ◽  
Philippe Vernay ◽  
Huguette Sallanon ◽  
Alain Coudret ◽  
...  

2020 ◽  
Vol 21 (2) ◽  
pp. 25-40 ◽  
Author(s):  
A. Ennabili ◽  
M. Radoux

Nutrient absorption is a function, among others, aimed at macrophytes for wastewater treatment. In this work, Typha angustifolia, Phragmites australis, and Sparganium erectum were multi-annually compared in secondary and tertiary treatment of urban wastewater under Mediterranean climate. Phragmites shows higher growth in height and density during the vegetative period of 1.83-2.09 cm.d-1 and 29-49 times the planting density, respectively. Aerial biomass records 52.2-54.3, 38.1-41.0, and 19.4 t dw.ha-1 in Phragmites, Typha, and Sparganium in the same order. The underground biomass fluctuates depending on the rooting vigour from 1.45 t dw.ha-1 for Sparganium to 44.49 t dw.ha-1 for Phragmites in tertiary treatment. Nitrogen and phosphorus aerial mineralomasses are more important in Phragmites (787 kg N.ha-1) and Typha (107 kg P.ha-1) in secondary treatment. Phragmites is, by far, the most cumulative of N and P in its underground part. The N and P retention by the vegetated mesocosms apparently has overall relationship with N-NH4+ and P-PO43-. Compared to mesocosm input, Phragmites assimilates one’s maximum of 6.39% N in its aerial tissues and 7.86% P in the underground ones, whereas Typha records maxima of 14.8% N and 33.6% P in its aerial part with respect to corresponding mesocosm removal. ABSTRAK:Penyerapan nutrien adalah satu fungsi, antara lain, bertujuan untuk makrofit merawat sisa air. Kajian ini menggunakanTypha angustifolia, Phragmites australis dan Sparganium erectumbagi membandingkan pelbagai-jenis rawatan sekunder dan tertiar sisa air bandar pada iklim Mediterranean. Phragmites menunjukkan pertumbuhan tertinggi dalam ketinggian dan ketumpatandalam tempoh vegetatif iaitu 1.83-2.09 cm.d-1dan 29-49 kaliketumpatan penanaman, masing-masing. Rekod biojisim udara mencatatkan 52.2-54.3, 38.1-41.0, dan 19.4 t dw.ha-1 dalam Phragmites,Typha, dan Sparganium pada susunan sama. Biojisim bawah tanah berubah-ubah bergantung kepada kekuatanakar dari 1.45 t dw.ha-1 untuk Sparganium hingga 44.49 t dw.ha-1 untuk Phragmites dalam rawatan tertiar. Nitrogen dan Fosforus Mineralomassa udara adalah lebih penting untukPhragmites (787 kg N.ha-1) dan Typha (107 kg P.ha-1) dalam rawatan sekunder. Phragmites, setakat ini, paling kumulatif bagi N dan P pada bahagian bawah tanah. Pembendungan N dan P oleh mesokisme tumbuh-tumbuhan secara nyata berkaitan dengan N-NH4+ dan P-PO43-. Berbanding input mesokisme,Phragmites mengasimilasi maksimum pada N 6.39% tisu udara dan P 7.86% bahagian bawah tanah, manakala Typha mencatatkan maksima N 14.8% dan P 33.6% pada bahagian udara dengan penyingkiran mesokisme sepadan. ABSTRAK: Penyerapan nutrien adalah satu fungsi, antara lain, bertujuan untuk makrofit merawat sisa air. Kajian ini menggunakan Typha angustifolia, Phragmites australis dan Sparganium erectum bagi membandingkan pelbagai-jenis rawatan sekunder dan tertiar sisa air bandar pada iklim Mediterranean. Phragmites menunjukkan pertumbuhan tertinggi dalam ketinggian dan ketumpatan dalam tempoh vegetatif iaitu 1.83-2.09 cm.d-1 dan 29-49 kali ketumpatan penanaman, masing-masing. Rekod biojisim udara mencatatkan 52.2-54.3, 38.1-41.0, dan 19.4 t dw.ha-1 dalam Phragmites, Typha, dan Sparganium pada susunan sama. Biojisim bawah tanah berubah-ubah bergantung kepada kekuatan akar dari 1.45 t dw.ha-1 untuk Sparganium hingga 44.49 t dw.ha-1 untuk Phragmites dalam rawatan tertiar. Nitrogen dan Fosforus Mineralomassa udara adalah lebih penting untuk Phragmites (787 kg N.ha-1) dan Typha (107 kg P.ha-1) dalam rawatan sekunder. Phragmites, setakat ini, paling kumulatif bagi N dan P pada bahagian bawah tanah. Pembendungan N dan P oleh mesokisme tumbuh-tumbuhan secara nyata berkaitan dengan N-NH4+ dan P-PO43-. Berbanding input mesokisme, Phragmites mengasimilasi maksimum pada N 6.39% tisu udara dan P 7.86% bahagian bawah tanah, manakala Typha mencatatkan maksima N 14.8% dan P 33.6% pada bahagian udara dengan penyingkiran mesokisme sepadan.


2019 ◽  
Vol 135 ◽  
pp. 01055 ◽  
Author(s):  
Evgeniy Voitov ◽  
Yuri Skolubovich ◽  
Victor Kravchenko ◽  
Tamara Khalturina

The use of technical oxygen instead of air in biological treatment plants can increase their oxidizing ability. Bioreactor-clarifier is a new technical device for tertiary wastewater treatment with the use of oxygen. The design, operation principle and research results of the bioreactor-clarifier for tertiary treatment of urban wastewater are given The use of bioreactors-clarifiers for tertiary treatment of urban wastewater using dissolved technical oxygen allows intensifying the process of biochemical oxidation of organic substances in a contact weighed load and increasing the efficiency of wastewater treatment by BOD and other components.


Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1339
Author(s):  
Javier Bayo ◽  
Sonia Olmos ◽  
Joaquín López-Castellanos

This study investigates the removal of microplastics from wastewater in an urban wastewater treatment plant located in Southeast Spain, including an oxidation ditch, rapid sand filtration, and ultraviolet disinfection. A total of 146.73 L of wastewater samples from influent and effluent were processed, following a density separation methodology, visual classification under a stereomicroscope, and FTIR analysis for polymer identification. Microplastics proved to be 72.41% of total microparticles collected, with a global removal rate of 64.26% after the tertiary treatment and within the average retention for European WWTPs. Three different shapes were identified: i.e., microfiber (79.65%), film (11.26%), and fragment (9.09%), without the identification of microbeads despite the proximity to a plastic compounding factory. Fibers were less efficiently removed (56.16%) than particulate microplastics (90.03%), suggesting that tertiary treatments clearly discriminate between forms, and reporting a daily emission of 1.6 × 107 microplastics to the environment. Year variability in microplastic burden was cushioned at the effluent, reporting a stable performance of the sewage plant. Eight different polymer families were identified, LDPE film being the most abundant form, with 10 different colors and sizes mainly between 1–2 mm. Future efforts should be dedicated to source control, plastic waste management, improvement of legislation, and specific microplastic-targeted treatment units, especially for microfiber removal.


2021 ◽  
pp. 100059
Author(s):  
Lijiao Liu ◽  
Junjun Cao ◽  
Mehran Ali ◽  
Jiaxin Zhang ◽  
Zhaolong Wang

2020 ◽  
Vol 6 (1) ◽  
pp. 153-165 ◽  
Author(s):  
Nur Hafizah Ab Hamid ◽  
Simon Smart ◽  
David K. Wang ◽  
Kaniel Wei Jun Koh ◽  
Kalvin Jiak Chern Ng ◽  
...  

This study systematically explores the potential applications of forward osmosis (FO) membrane based technology in urban wastewater treatment and water reclamation for their techno-economic feasibility and sustainability.


2011 ◽  
Vol 223 (4) ◽  
pp. 1699-1712 ◽  
Author(s):  
J. Martín-Pascual ◽  
C. López-López ◽  
A. Cerdá ◽  
J. González-López ◽  
E. Hontoria ◽  
...  

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