scholarly journals Šedá vodní stopa jako ukazatel udržitelného vypouštění odpadních vod – případová studie Povodí Ohře

Entecho ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 12-18 ◽  
Author(s):  
Libor Ansorge ◽  
Lada Stejskalová ◽  
Jiří Dlabal ◽  
Jiří Kučera
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Sustainability Assessment ◽  
Water Footprint ◽  
Wastewater Treatment Plants ◽  
Ammonia Nitrogen ◽  
Municipal Wastewater Treatment ◽  
Grey Water ◽  
Municipal Wastewater Treatment Plants ◽  
Assimilation Capacity

Cíle udržitelného rozvoje OSN požadují mimo jiné i zlepšit kvalitu vody snížením jejího znečišťování, zamezením vyhazování odpadů do vody a minimalizací vypouštění nebezpečných chemických látek do vody. Jedním z nástrojů, který lze využít pro posouzení udržitelnosti vypouštění znečištění do vod je vodní stopa. V článku je popsána analýza šedé vodní stopy velkých komunálních čistíren v povodí Ohře. Pro analýzu byly vybrány komunální čistírny odpadních vod uvedené státním podnikem Povodí Ohře ve zprávách vodohospodářské bilance. Byla stanovena asimilační kapacita toku pro jednotlivé znečišťující látky hlášené provozovateli čistíren odpadních vod pro účely vodohospodářské bilance, spočtena šedá vodní stopa látek vstupujících na čistírnu odpadních vod (produkované znečištění) a vypouštěných do recipientů v odpadní vodě. Posouzení udržitelnosti bylo provedeno k dlouhodobému průměrnému průtoku recipientem. Analýza ukázala, že asimilační kapacita vodních toků je nejvíce vytěžována vypouštěním celkového fosforu a amoniakálního dusíku. Zároveň z analýzy vyplynulo, že čistírny odpadních vod, až na výjimky, čistí vodu dostatečně a asimilační kapacita vodního toku nebývá vyčerpána. ----------- The Sustainable Development Goals (SDGs), adopted by all United Nations Member States in 2015, call, among others, for the improvement of water quality by reducing water pollution, avoiding waste disposal in water and minimizing hazardous chemicals discharge into water. One of the tools that can be used for the sustainability assessment of pollution discharge into water is the water footprint. The paper calculates the grey water footprint of large municipal wastewater treatment plants in the Ohře River basin, located in the Czech Republic. Municipal wastewater treatment plants listed by the state-owned enterprise Povodí Ohře in Water Balance Management reports were selected for the analysis. The receiving body assimilation capacity for individual pollutants was determined and the grey water footprint at the inlet and outlet of the WWTP was calculated. Subsequently, the sustainability assessment of the WWTP discharges were carried out and related to the long-term average flow rates in the receiving water body. The analyses showed that the assimilation capacity of the watercourse is mostly utilized by the discharge of total phosphorus and ammonia nitrogen. The analysis also showed that (with some exceptions) the wastewater treatment plants treat water sufficiently and the assimilation capacity of the watercourse is not exhausted.

scholarly journals Environmental and Energy Assessment of Municipal Wastewater Treatment Plants in Italy and Romania: A Comparative Study

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1611 ◽  
Author(s):  
Daniela Fighir (Arsene) ◽  
Carmen Teodosiu ◽  
Silvia Fiore
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Greenhouse Gas ◽  
Municipal Wastewater ◽  
Sustainability Assessment ◽  
Wastewater Treatment Plants ◽  
Ghg Emissions ◽  
Energy Performance ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plants

Municipal wastewater treatment plants (MWWTPs) are essential infrastructures in any urban context, but they may be considered as a potential source of greenhouse gas (GHG) emissions and should be coherent with European Union (EU) policy on energy efficiency. This study presents a sustainability evaluation of four Italian and Romanian MWWTPs in terms of energy efficiency and greenhouse gas emissions using Energy Performance and Carbon Emissions Assessment and Monitoring (ECAM) tool software. The obtained results indicated that biogas recovery improved energy performances, while the largest contributions in terms of GHG emissions were in all cases caused by energy consumption and methane produced during wastewater treatment. The Romanian plants exhibited higher GHG emissions, compared to the Italian plants, mainly because of the different values of national conversion factors for grid electricity (0.41 kg CO2/kWh for Italy and 1.07 kg CO2/kWh for Romania). Two scenarios aimed at enhancing the overall sustainability were hypothesized, based on increasing the serviced population or energy efficiency, achieving significant improvements. A sustainability assessment of MWWTPs should be adopted as a useful tool to help water utilities to introduce low-energy, low-carbon management practices as well as being useful for policy recommendations.

A study about the use of chemicals in conventional tertiary treatment. Performances comparison of three municipal wastewater treatment plants and pilot plant experiences

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
A. Iborra-Clar ◽  
J.A. Mendoza-Roca ◽  
A. Bes-Pií ◽  
J.J. Morenilla-Martínez ◽  
I. Bernácer-Bonora ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Pilot Plant ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Wastewater Reclamation ◽  
Valencian Region ◽  
Municipal Wastewater Treatment Plants

Rainfall diminution in the last years has entailed water scarcity in plenty of European regions, especially in Mediterranean areas. As a consequence, regional water authorities have enhanced wastewater reclamation and reuse. Thus, the implementation of tertiary treatments has become of paramount importance in the municipal wastewater treatment plants (WWTP) of Valencian Region (Spain). Conventional tertiary treatments consist of a physico-chemical treatment of the secondary effluent followed by sand filtration and UV radiation. However, the addition of coagulants and flocculants sometimes does not contribute significantly in the final water quality. In this work, results of 20-months operation of three WWTP in Valencian Region with different tertiary treatments (two without chemicals addition and another with chemicals addition) are discussed. Besides, experiments with a 2 m3/h pilot plant located in the WWTP Quart-Benager in Valencia were performed in order to evaluate with the same secondary effluent the effect of the chemicals addition on the final water quality. Results showed that the addition of chemicals did not improve the final water quality significantly. These results were observed both comparing the three full scale plants and in the pilot plant operation.

Nanofiltration of endocrine disrupting compounds

2003 ◽  
Vol 3 (5-6) ◽  
pp. 321-327 ◽  
Author(s):  
M. Gallenkemper ◽  
T. Wintgens ◽  
T. Melin
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Endocrine Disrupting Compounds ◽  
Municipal Wastewater Treatment ◽  
Water And Wastewater Treatment ◽  
Wide Range ◽  
Endocrine Disrupting ◽  
Municipal Wastewater Treatment Plants ◽  
Set Up

Endocrine disrupting compounds can affect the hormone system in organisms. A wide range of endocrine disrupters were found in sewage and effluents of municipal wastewater treatment plants. Toxicological evaluations indicate that conventional wastewater treatment plants are not able to remove these substances sufficiently before disposing effluent into the environment. Membrane technology, which is proving to be an effective barrier to these substances, is the subject of this research. Nanofiltration provides high quality permeates in water and wastewater treatment. Eleven different nanofiltration membranes were tested in the laboratory set-up. The observed retention for nonylphenol (NP) and bisphenol A (BPA) ranged between 70% and 100%. The contact angle is an indicator for the hydrophobicity of a membrane, whose influence on the permeability and retention of NP was evident. The retention of BPA was found to be inversely proportional to the membrane permeability.

Experience from 10 Years Advanced Wastewater Treatment – Technology and Results

1982 ◽  
Vol 14 (1-2) ◽  
pp. 121-133
Author(s):  
C Forsberg ◽  
B Hawerman ◽  
B Hultman
Keyword(s):  
Wastewater Treatment ◽  
Urban Population ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Municipal Wastewater Treatment ◽  
Treatment Technology ◽  
Removal Efficiencies ◽  
Municipal Wastewater Treatment Plants ◽  
Operational Modes ◽  
Polluted Waters

Experience from advanced municipal wastewater treatment plants and recovery of polluted waters are described for the last ten years in Sweden. Except in municipalities with large recipients, the urban population is served by treatment plants with combined biological and chemical treatment. Most of these plants are post-precipitation plants. Several modified operational modes have been developed in order to improve the removal efficiencies of pollutants and to reduce the costs. Results are presented on the recovery of specially investigated lakes with a lowered supply of total phosphorus and organic matter.

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