scholarly journals Valorisation of sewage sludge humic compounds in the aspect of its application in natural environment

2021 ◽  
Vol 47 (1) ◽  
Author(s):  
Monika Jakubus ◽  
Ewa Bakinowska ◽  
Erika Tobiašová
Keyword(s):  
Sewage Sludge ◽  
Natural Environment ◽  
Humic Compounds

scholarly journals ECOLOGICAL-HYGIENIC ASSESSMENT OF PRODUCTION WASTE FOR THE USE IN ROAD CONSTRUCTION

2019 ◽  
Vol 96 (4) ◽  
pp. 309-313
Author(s):  
N. V. Rusakov ◽  
L. A. Alikbayeva ◽  
O. N. Mokrousova ◽  
G. I. Chernova
Keyword(s):  
Sewage Sludge ◽  
Natural Environment ◽  
Road Construction ◽  
Production Waste ◽  
Multicomponent Mixtures ◽  
The Baltic Sea ◽  
Percentage Content ◽  
Waste Production ◽  
The Baltic ◽  
The City

The purpose of the study is to make a comprehensive ecological and hygienic assessment of production waste - ferromanganese nodules of the Baltic sea and ash from sewage sludge for compliance with the use as road material. Material and methods. The study was executed in accordance with the applicable guidelines. Results. Waste production of Manganese - Ferruginous Sands, and ash from the incineration of sewage sludge in the city of St. Petersburg represent complex multicomponent mixtures of substances with different percentage content of metals (manganese, iron, silicon, phosphorus, aluminum, cadmium) and their compounds which seem to be low-hazard wastes (IV class of danger) to the natural environment.

scholarly journals Adsorption treatment of sewage sludge from heavy metals

2020 ◽  
Vol 12 (5) ◽  
pp. 285-291
Author(s):  
A.M. Nazarov ◽  
I.O. Tuktarova ◽  
A.A. Kulagin ◽  
L.Kh. Araslanova ◽  
V.A. Archipenko
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Power Plants ◽  
Thermal Power ◽  
Field Tests ◽  
Thermal Methods ◽  
Sodium Humate ◽  
Humic Compounds ◽  
Processing Plants ◽  
Adsorption Treatment

Introduction. Because of urban development the volume of municipal and industrial wastewater are growing. Along with them the amount of sewage sludge (SS) also increases. Millions of tons of SS are currently accumulated on the territory of the Russian Federation and contain various pollutants, including heavy metals (HM). In this regard, the search for effective methods of SS treatment from HM is an urgent problem. The main methods of SS treatment are drying, dehydration, thermal methods, UV and microwave wave treatment. These kinds of disinfection eliminates many pathogenic microorganisms, but they are quite expensive and not effective against HM. Reagent methods include SS disinfection with quicklime (CaO). However, decontamination requires large doses (up to 30%) and it is also ineffective against HM. Humic-mineral reagent are more effective, they are based on crushed caustobiolites, their cleaning capacity from HM is 19–87%. Methods and materials. The authors have previously shown the effectiveness of wastewater treatment from HM using sorbents based on dolomite, quartzite, and waste from mining and processing plants. Therefore, a method for SS treatment from HM using sorbents based on dolomite, humates, and CS containing CaCO3 and humic compounds was proposed. In this regard, a method was proposed for SS treatment from HM using three types of sorbents based on: 1) waste of thermal power plants (TPP) – conditioned sludge (CS) containing CaCO3 up to 68% and humic compounds up to 12% – sorbent 1 (S1); 2) dolomite – Mg and Ca carbonate in a composition with sodium humate (25%)– sorbent 2 (S2); 3) modified dolomite with sodium humate (1%) – sorbent 3 (S3). Results and discussion. In laboratory experiments, the cleaning capacity of SS was studied using a dolomite-based sorbent modified with humate (1%). In field tests, a decrease in the concentration of HM in SS was studied with the use of sorbents based on CS and the complex sorbent dolomite-humate (75:25). The cleaning capacity of SS from HM increases in the series: sorbents based on waste from TPP – CS containing CaCO3 and humates (cleaning capacity E = 4.8–48.6% for dried SS and 29.3–53.3% for dehydrated SS) < sorbent based on a composition of dolomite with humate (E = 65.1–92.1% for dried and 56.6–89.4% for dehydrated SS) < a dolomite-based sorbent modified with humate (E = 90.8–99.9%). Conclusions. The maximum cleaning capacity is shown by a dolomite-based sorbent coated with a nano- and micro- sized layer of sodium humate.

scholarly journals Impact of thermal treatment of mixtures of sewage sludge and plant material on selected chemical properties and Vibrio fischeri response

2017 ◽  
Vol 24 (3) ◽  
pp. 443-455
Author(s):  
Krzysztof Gondek ◽  
Agnieszka Baran ◽  
Monika Mierzwa-Hersztek ◽  
Michał Kopeć
Keyword(s):  
Trace Elements ◽  
Sewage Sludge ◽  
Thermal Treatment ◽  
Vibrio Fischeri ◽  
Chemical Properties ◽  
Effect Of Temperature ◽  
Plant Component ◽  
Plant Materials ◽  
Humic Compounds ◽  
Two Temperature

Abstract The aim of the research was to evaluate the effect of temperature during the treatment process as well as the effect of adding plant materials to sewage sludge on selected chemical properties and Vibrio fischeri response. The mixtures were placed in a chamber furnace, under airless conditions. Two temperature procedures were applied: 300 and 600ºC; the exposure time in both cases was 15 minutes. Thermal treatment of sewage sludge without a plant component is not well-founded and may cause an increase in concentration of trace elements. Using the temperature of 300ºC caused significantly lower changes in the contents of total forms of trace elements than using the temperature of 600ºC. The metals extracted from the studied mixtures were not toxic for the Vibrio fischeri. In the case of the fractional composition of humic compounds, thermal treatment of mixtures of sewage sludge and plant materials is not beneficial in terms of labile fractions, but it had a beneficial effect on stabilizing the durable bonds between C compounds in those mixtures.

Random isn't real: How the patchy distribution of ecological rewards may generate “incentive hope”

2019 ◽  
Vol 42 ◽  
Author(s):  
Laurel Symes ◽  
Thalia Wheatley
Keyword(s):  
Natural Environment ◽  
Random Distribution ◽  
Spatiotemporal Distribution ◽  
Patchy Distribution ◽  
Distribution Of Resources

AbstractAnselme & Güntürkün generate exciting new insights by integrating two disparate fields to explain why uncertain rewards produce strong motivational effects. Their conclusions are developed in a framework that assumes a random distribution of resources, uncommon in the natural environment. We argue that, by considering a realistically clumped spatiotemporal distribution of resources, their conclusions will be stronger and more complete.

Extreme self-sacrifice beyond fusion: Moral expansiveness and the special case of allyship

2018 ◽  
Vol 41 ◽  
Author(s):  
Daniel Crimston ◽  
Matthew J. Hornsey
Keyword(s):  
General Theory ◽  
Biological Markers ◽  
Natural Environment ◽  
Relevant Dimension ◽  
Special Case

AbstractAs a general theory of extreme self-sacrifice, Whitehouse's article misses one relevant dimension: people's willingness to fight and die in support of entities not bound by biological markers or ancestral kinship (allyship). We discuss research on moral expansiveness, which highlights individuals’ capacity to self-sacrifice for targets that lie outside traditional in-group markers, including racial out-groups, animals, and the natural environment.

Philosophy and the Natural Environment

1994 ◽  
Author(s):  
Robin Attfield ◽  
Andrew Belsey
Keyword(s):  
Natural Environment

Measurement of some topographical aspects of smoking in the natural environment.

1983 ◽  
Author(s):  
Roy W. Pickens ◽  
Steven W. Gust ◽  
Philip M. Catchings ◽  
Dace S. Svikis
Keyword(s):  
Natural Environment
Sign in / Sign up

Export Citation Format

Share Document