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1
Content available Ocena składu fizyczno-chemicznego osadów ściekowych pochodzących z komunalnej oczyszczalni ścieków
Milik J., Pasela R., Szymczak M., Chalamoński M.
Rocznik Ochrona Środowiska
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2016
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Tom 18, cz. 2
579--590
EN
Municipal sewage sludge are a by-product of waste water treatment. The problems of sludge associated with the development of sludge require urgent solutions. Municipal sewage sludge may be used in agriculture in two forms: processed and unprocessed if they are stabilized and comply with acceptable levels of heavy metals and sanitation indicators and include the relevant product quantities of organic compounds and fertilizing nitrogen, phosphorus and potassium. Composition and quantity of sludge produced in the wastewater treatment process is different and depends on several parameters such as quality of waste water and processes for their purification. The presents shows an assessment of the physical and chemical sludge from sewage treatment plants selected and the results of research and analysis for the sludge collected from said object. Analysis of the results was carried out for possibilities to use sewage sludge for agricultural purposes. Sewage sludge derived from a sewage treatment plant mechanical-biological stabilization of sludge anaerobic digestion with a capacity of 26,400 m3. per day. The sediment samples were collected in the period from January to September 2015 year with a two-month interval. Attempts were subjected to microwave mineralization in a closed system in aqua regia. The heavy metal concentrations determined with a spectrophotometer Coupled Plasma emission ICP-OES Perkin-Elmer Optima 8000 detecting elements P, Ca, Mg, Pb, Cd, Hg, Ni, Zn, Cu, Cr. The collected sediment were determined: pH, dry weight of sediment, organic matter (marked as loss on ignition at 550 ° C), total nitrogen (Kjeldahl) and ammonium nitrogen. The results were compared with the limit values according to the law. It has been shown that the predominant heavy metals present in the sludge was copper and zinc, mercury was not detected. The value of organic matter sludge tested ranged from 49.36 to 63.15% of dry matter. The content of heavy metals in sediments was measured by reference to the existing provisions governing the use of natural sewage sludge. The contents of heavy metals were low and did not exceed the limit values in sewage sludge for their use in agriculture and land reclamation. The studied sediments were stable nature. The results indicate the good properties of the sludge, which can be used as organic fertilizer. It has been shown that the sludge produced in the study treatment did not exceed in any case permissible concentrations of heavy metals specified for sewage sludge used for agricultural purposes. The annual average content of heavy metals in the study period remained at a similar level. Understanding the composition of the physico-chemical sludge waste is the basis for the decision over their processing, use or disposal. The precipitate may be disposed by using thermal methods for combustion of solid comprising 90% of dry matter.
2
Content available remote Usuwanie farmaceutyków ze ścieków
Buntner D., Żabczyński S., Miksch K.
Chemik
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2007
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Vol. 60, nr 2
120-124
PL
W artykule dokonano przeglądu literatury o zanieczyszczaniu środowiska farmaceutykami oraz sposobami ich usuwania ze ścieków. Przedstawiono dane liczbowe o skuteczności ich oczyszczania z wykorzystaniem osadu czynnego i zaawansowanych technologii. Ponieważ żadna z przedstawionych metod nie jest w stanie usunąć wszystkich zanieczyszczeń, bardzo istotne jest głębsze poznanie zachowania i wpływu tych substancji na środowisko.
EN
This article presents a review of available information of the occurrence, fate and effects of pharmaceuticals on the environment, as well as characterization of the main groups of PhACs and their removal rates during wastewater treatment: a) in technologies based on the activated sludge processes and b) in advanced technologies. Additionally, the comparison of the efficiency of pharmaceuticals removal in wastewater treatment processes was presented. However, there is no single technology which would be able to remove all emerging compounds, therefore further investigation is needful.
3
Transport rurociągami zagęszczonych osadów ściekowych w oczyszczalniach ścieków
Sęk J., Kiljański T., Szewczyk J.
Inżynieria i Aparatura Chemiczna
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2006
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Nr 4s
125-126
EN
Rheological properties of concentrated sludge both raw and after fermentation were investigated. They were found to be shear- -thinning fluids obeying the power-law. The influence of a dry mass content in the sludge in the range of 3.2% to 6.2% and of the addition of flocculant applied in the treatment process was investigated. The nomogram was specified for a prediction of the pipeline diameter in sludge transport at a given concentration and volumetric flow rate.
4
Sorpcja emulsji za pomocą włóknin polipropylenowych
Sęk J.
Inżynieria i Aparatura Chemiczna
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2006
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Nr 4s
123-124
EN
Imbibition of polypropylene cloth was investigated using oil and kerosene in water emulsions with different concentrations of inner phase. Microscopic photographs revealed that no phase separation occurred during sorption. It was found also that the cloth used was hydrophobic but the velocity of sorption processes were dependent on the dispersed phase concentration and on liquid used as internal phase.
5
Modyfikacja struktur sieci wodnych z zastosowaniem algorytmu alokacji strumieni zintegrowanego z systemem ekspertowym
Gabriel U., Szaniawska D.
Inżynieria i Aparatura Chemiczna
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2006
|
Nr 5s
39-42
6
Oczyszczanie ścieków w sekwencyjnym reaktorze półciąglym
Szewczyk K. W., Shao Y.
Inżynieria i Aparatura Chemiczna
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2005
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Nr 4s
103-104
EN
Results of laboratory investigation of wastewater treatment in a sequencing fed-batch reactor are presented. It has been shown that COD and nitrogen concentrations decreased in the reactor.
7
Content available remote Badania procesu elektrochemicznego rozkładu mocznika na elektrodzie grafitowej
Piotrowski J., Simka W., Krząkała A.
Chemik
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2005
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Vol. 58, nr 6
376-378
PL
Przedstawiono badania procesu elektrochemicznego rozkładu mocznika na elektrodzie grafitowej.
EN
The investigations on the process of anodic decomposition of the urea on the graphite electrode have been presented.
8
Oczyszczanie ścieków pochodzących z przemysłu meblarskiego
Gniady J., Hehn Z.
Chemia i Inżynieria Ekologiczna
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1998
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Vol. 5, nr 1-2
41-44
PL
Przedstawiono charakterystyk odpadów powstających podczas produkcji mebli oraz propozycję ich utylizacji.
EN
Specifications for the wastes generated in the production of furniture have been provided as well as sugested method for their utilization.
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