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Macroalgae management in coastal regions in the aspect of sustainable development strategy

100%

Dereszewska A., Cytawa S.

Annals of the Polish Association of Agricultural and Agrobusiness Economists

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2019

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tom 21

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nr 1

The article discusses the problem of excessive growth of one-year filamentous algae, contributing to the disturbance of ecological balance in the Puck Bay. The aim of the study is to estimate the possibility of restoring this balance through the use of macroalgae as a co-substrate for biogas and fertilizer production in the regional biological wastewater treatment plant (WWTP). Effectiveness of biogas production from aquatic plants, including free-floating filamentous algae, was examined. Tests have shown that the biogas potential of seaweed constitutes the level of 162 m3/Mg of organic dry solid substances of algae. It was estimated that using the summer intense algal growth, removing 65,000 Mg of algae, 800,000 m3 of biogas can be obtained from the area covering the inner Puck Bay. After biogas conversion, 2,320 MWh of electricity and 2,100 MWh of heat energy could be produced. Harvesting free-floating algae enables the annual removal of 100-150 Mg of phosphorus and 200-400 Mg of nitrogen from Puck Bay and, thus, reduces the level of its eutrophication. Macroalgae management at a certain stage of growth also prevents the presence of algae on beaches and contributes to the improvement of fishing conditions and boosts the tourism value of the region.

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Przetwarzanie agroodpadów w świetle gospodarki o obiegu zamkniętym

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Dereszewska A., Cytawa S.

Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu

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2017

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tom 19

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nr 6

Omówiono metody postępowania z odpadami rolniczymi w kontekście zasady maksymalnego obiegu zamkniętego dla związków organicznych. Przedstawiono koncepcję regionalnej gospodarki agroodpadami z uwzględnieniem istniejących rozwiązań technologicznych, w tym biogazowni rolniczych oraz biogazowni zlokalizowanych przy oczyszczalniach ścieków. Oszacowano potencjał biogazowy dla odpadów rolniczych współfermentowanych z osadem wstępnym oczyszczalni ścieków. Przedstawiono obieg azotu, fosforu i węgla w biogazowni przy oczyszczalni ścieków. Określono stopień recyklingu organicznego tych pierwiastków.

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Wplyw sezonowych zmian temperatury na wlasciwosci sedymentacyjne osadu czynnego

81%

Cytawa S., Medrzycka K., Tomczak-Wandzel R.

Ekologia i Technika

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2007

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tom 15

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nr 2

39-43

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The effect of anionic surfactant concentration on activated sludge condition and phosphate release in biological treatment plant

81%

Dereszewska A., Cytawa S., Tomczak-Wandzel R., Medrzycka K.

Polish Journal of Environmental Studies

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2015

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tom 24

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nr 1

This paper discusses the influence of a wide range of anionic surfactant concentrations on activated sludge. Linear alkylbenzene sulphonate (LAS) was chosen as an example of a commonly used anionic surfactant. The fate of the surfactant during biological treatment of wastewater was tested. The effect of surfactant on glucose and starch removal was studied. It has been found that in the case of glucose the removal was independent of LAS concentration, while in the case of starch it was incomplete at high surfactant loads (above 15 mg·(g·dss)⁻¹). The study established that surfactants can activate or inhibit microorganism activity, depending on surfactant concentration. LAS loads up to 3 mg·(g·dss)⁻¹ positively stimulate the removal of COD, phosphorus release and the respirometric activity of the sludge. LAS loads higher than 15 mg·(g·dss)⁻¹ inhibit respiration of activated sludge bacteria and decrease phosphorus removal. It also affects the morphology of activated sludge flocs, causing their fragmentation and lysis of protozoa cells.

Ograniczanie wyników

1 Annals of the Polish Association of Agricultural and Agrobusiness Economists

1 Ekologia i Technika

1 Polish Journal of Environmental Studies

1 Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu

4 Cytawa S.

3 Dereszewska A.

2 Medrzycka K.

2 Tomczak-Wandzel R.

1 2019

1 2017

1 2015

1 2007

Macroalgae management in coastal regions in the aspect of sustainable development strategy

Przetwarzanie agroodpadów w świetle gospodarki o obiegu zamkniętym

Wplyw sezonowych zmian temperatury na wlasciwosci sedymentacyjne osadu czynnego

The effect of anionic surfactant concentration on activated sludge condition and phosphate release in biological treatment plant