ANALYSIS OF PHOSPHORUS SPECIATION IN PRIMARY SLUDGE
IN THE ANNUAL CYCLE

Elżbieta Bezak-Mazur, Renata Stoińska, Bartosz Szeląg

Kielce University of Technology, Faculty of Environmental, Geomatic
and Energy Engineering, Department of Water and Wastewater Engineering
e-mail: bezak-mazur@o2.pl, Elżbieta Bezak-Mazur

Received:31.05.2017

© Bezak-Mazur E., Stoińska R., Szeląg B., 2017

Abstract. The objective of the research was to investigate phosphorus speciation in sewage sludge in order to determine the amount of the element that can be assimilated by plants after the application of sludge for nature-related purposes. Since the possibility of using sludge for such purposes is of considerable importance, this paper analyses the content of different phosphorus speciation forms (including the bioavailable ones) in primary sludge. The studies’ results indicate that the maximum share of mobile forms (Ca-EDTA+Na-EDTA) in primary sludge in the annual cycle amounts to merely 46 %. This confirms the observation that in the examined period the hardly-available, organic phosphorus forms are dominant (fractions H2SO4 and NaOH). Therefore, after the application of primary sludge for nature-related purposes, only a small portion of phosphorus included therein is assimilated by plants.

Key words: primary sludge, phosphorus speciation, application of primary sludge for nature-related purposes.

Кількість посилань 5

USING THE MODIFIED REDFIELD RATIO
TO ESTIMATE HARMFUL ALGAL BLOOMS

Kateryna Hushchyna, Tri Nguyen-Quang

Biofluids and Biosystems Modeling Lab (BBML)
Faculty of Agriculture, Dalhousie University, Canada
Tel: (902) 893-6711 Fax: (902) 893-1859
tri.nguyen-quang@dal.ca

Received: 25.06.2017

© Hushchyna K., Nguyen-Quang T., 2017

Abstract. Many waterbodies across Nova Scotia (Canada) have been experiencing algal blooms occurring in large numbers and diversity, without knowledge or understanding about their causes and effects. Algal blooms have appeared in Mattatall Lake (ML) and other lakes of the province in recent years. ML experienced severe algal blooms in 2013. During the fall of 2014, massive algal blooms appeared in ML, and persisted until late December 2014. The blooms have a pattern of being nontoxic in the summer and potentially toxic in the fall-winter season, with nutrients increasing on a monthly basis. This phenomenon is unusual as algal blooms have not been known to last until the winter season or coexist with icy conditions. The dominant species in this bloom was identified to be Anabaena planctonica (Dolicospermum planctonicum) with a cell count around 250 000 cells/mL, which may produce the neurotoxin Anatoxin-a. This cell count is approximately two and a half times higher than the alert level 2 guideline from World Health Organization’s drinking water standards (WHO, 2003).
The goal of this paper is to use an index (Modified Redfield Ratio, hereafter called MRR) to estimate the HAB occurrence the Mattatall lake (Nova Scotia, Canada), served as a pilot site for our pioneering systematic study in order to evaluate the recent bloom phenomena in the entire province of Nova Scotia.

Key words: Cyanobacteria, Harmful Algal Blooms (HAB), Modified Redfield Ratio (MRR), Mattatall lake.

Кількість посилань 11

WAYS TO MINIMIZE ENVIRONMENTAL HAZARDS FROM POLLUTION OF THE ENVIRONMENT IN THE ZONE
OF INFLUENCE OF THE HRYBOVYCHI LANDFILL

Myroslav Malyovanyy, Vira Sliusar, Andriy Sereda

Lviv Polytechnic National University, 12, S. Bandery Str., Lviv, 79013, Ukraine
mmal@lp.edu.ua, virashandrovych@ukr.net, seredaa92@gmail.com

Received:10.05.2017

© Malyovanyy M., Sliusar V., Sereda A., 2017

Abstract. The article analyzes the environmental risks of existing landfills in Ukraine (on the example of Hrybovytske landfill). The possible treatment technologies of the accumulated infiltrates were analysed and the successful application of infiltrates biological treatment technology in aerobic lagoons was confirmed. It was shown that the problem of introducing innovative technologies for solid waste management could be solved only by a complex approach: creating the conditions for technical and biological remediation of existing landfills and providing a system of measures with the aim of preventing environmental pollution.

Key words: environmental risks, landfills, infiltrates, aerobic lagoons, remediation, environmental.

Кількість посилань 11

INFLUENCE OF ARTIFICIAL ACID RAINS ON THE SOILS
OF DIFFERENT MECHANICAL COMPOSITION

Oksana Kovalchuk, Myroslav Malyovanyy, Olena Popovych, Nataliya Vronska

Lviv Polytechnic National University
12, S. Bandery Str., Lviv, 79013, Ukraine

Received: 28.06.2017

© Kovalchuk O., Malyovanyy M., Popovych O., Vronska N., 2017

Abstract. Acid rain influence determination created on the basis of sulfuric, nitric acids and their mixture on the chemical properties of soil substrates of different mechanical composition

Key words: Acid rains, soils, mechanical composition of soil, chemical properties

Кількість посилань 7

INVESTIGATION OF THE PROCESSES OF CHEMICAL (ACID) LABILIZING OF CLINOPTILOLITE

Volodymyr Troszkiy, Zoriana Hnativ, Vasyl Duleba, Tetiana Kriuchenko

Lviv Polytechnic National University, Institute of Chemistry and Chemical Technology,
12, S. Bandery Str., 79013, Lviv, Ukraine
e-mail: zoriana.y.hnativ@lpnu.ua

Received: 15.05.2017

© Troszkiy V. I., Hnativ Z. Ya., Duleba V. P., Kriuchenko T., 2017

Abstract. The results of research of the chemical activation process of clinoptilolite from Sokirnytskyi field are shown. As a result of the research, the effectiveness of the influence on zeolite hydrochloric and sulfuric acids are compared. It should be noted that the advantage is on the side of hydrochloric acid. It was established that the increase in the concentration of sulfuric acid and the time of zeolite processing leads only to the increase in the content of the amorphous phase. As a result of the experiment, optimal conditions for zeolite activation: reagent – hydrochloric acid, concentration of acid – 7 %, the processing time –
2 hours, phase ratio T:R – 1:2 were selected.

Key words: zeolite, acid activation, clinoptilolite, adsorbent.

Кількість посилань 11