scholarly journals Agro-Environmental Rationale of Sewage Sludge Processing and Application

2020 ◽  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Crop Yields ◽  
Conservation Agriculture ◽  
Fulvic Acids ◽  
Black Soil ◽  
Point Of View ◽  
Total Carbon ◽  
Mineral Fertilizers ◽  
Organic Mineral

Conservation agriculture is becoming a priority for Ukraine as well as for many countries of the world. It is a known fact that high content of heavy metals in the soil impairs fertility and carries the risk of crops translocation. An agroecological effect of obtaining and applying organic-mineral fertilizers has been insufficiently studied so far. The purpose of the work is to determine possibilities to produce new organic-mineral fertilizers based on sewage sludge with enhanced adsorbing properties, to establish their agroecological efficiency. Methods. Field, laboratory-analytical, statistical-mathematical. Results. From the agroecological point of view, the production process of organic-mineral fertilizers based on the sewage sludge of Kharkiv is justified. It allows us to expand functional capabilities of reagents, enhancing adsorbing properties of heavy metals. It is proved the advantage of organic-mineral fertilizers over the traditional ones on chernozem typical. After fertilization, the content of total carbon in the soil increased, the content of humic acids increased by 1,5 – 2,8 times, fulvic acids – by 1,1 – 1,7 times, the total sum of humic substances – by 1,3 – 2,1 times compared with no fertilizer option. It is established that application of organic-mineral fertilizers promotes blocking of heavy metals in soil and prevents translocation to plant. Maximum yields of corn were obtained after the local application of granular organic-mineral fertilizers – the yield increase was 41% compared to the control, after introduction of bulk fertilizers – 32% compared to the control. Profit was $ 23 -36 per hectare. Conclusions. The process of organic-mineral fertilizers production on the basis of sewage sludge in Kharkiv is substantiated from the agro-ecological point of view. Agroecological and agrochemical efficacy of sewage sludge use as compared to organic and mineral fertilizers applied in equivalent doses separately was established on the typical heavy loam chernozem. After introduction of organic-mineral fertilizers based on sewage sludge a significant increase in the concentration of trace elements and heavy metals was found in the black soil but these indicators did not exceed the established maximum permissible concentrations. The implementation of the proposed technology will reduce bioavailability of heavy metals and their mobility in the soil which, in turn, impedes their accumulation in products. It is expected to increase soil fertility, crop yields and obtain environmentally friendly and safe products due to the stable composition of innovative fertilizers.

scholarly journals Regulatory and technological prerequisites of the use of sewage sludge for the production of organic fertilizers

2020 ◽  
pp. 162-170
Author(s):  
R. Edgecock ◽  
V. V. Bratishko ◽  
I. V. Zinchenko ◽  
S. H. Karpus ◽  
D. O. Milko ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Raw Materials ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Raw Material ◽  
Organic Fertilizers ◽  
Mineral Fertilizers

Annotation Purpose. Summarize the regulatory and technological requirements for the production of organic (organo-mineral) fertilizers on the base of sewage sludge. Methods. Analysis and generalization of the requirements of regulatory documents on the management of organic waste and their use as raw materials for the production of organic fertilizers and soil improvers. Results. The current legislative, departmental and regulatory documentary base in Ukraine concerning the treatment of sediment resulting from biological sewage treatment at municipal wastewater treatment plants for its further use in agriculture as fertilizers is analysed. Indicators are identified and analysed to determine the possibility, feasibility, efficiency and scope of organic fertilizers produced using sewage sludge. The analysis of changes in the content of organic matter and total nitrogen in the sewage sludge during its storage at the sewage treatment plant sites is presented. The technological feasibility of using sludge of different shelf life in composting production has been determined. Conclusions 1. The regulatory framework of Ukraine contains a sufficiently complete list of indicators that should be met by organic raw materials (sewage sludge) for further use as organic fertilizers. Some of these indicators – bio security and heavy metals content – can be improved in the composting process of fertilizers. 2. Fresh sediment, as well as sediment accumulated in the last late autumn and winter periods, is of main value for use as a raw material in the production of organic fertilizers. 3. The use in the production of compost sludge stored on sludge sites for a period of half a year or more requires special control of the process of decontamination. In this case, it is advisable to use additional means of wastewater decontamination. Keywords: heavy metals, manure, humus, decontamination, composting, organic fertilizers, sewage sludge.

Current situation and future possibilities for the sewage sludge valorization

2014 ◽  
Vol 9 (4) ◽  
pp. 566-574 ◽  
Author(s):  
U. Ballabio ◽  
T. Vollmeier
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Thermal Treatment ◽  
Efficient Solution ◽  
Environmental Problems ◽  
Current Situation ◽  
Point Of View ◽  
Phosphorus Recovery ◽  
Topical Issue ◽  
Sludge Disposal

Thermal treatment is an efficient solution for the sewage sludge disposal, able to deal with the environmental problems related to some harmful elements inside sludge itself, as heavy metals, hormones, pharmaceutical derivates etc. This presentation wants to show the several reliable technologies available today, able to fulfil the requirements for efficiency and cheapness. Other solutions with interesting potentialities are now in a research phase, and they show promising future possibilities of application also from the point of view of the environmental acceptability related to these technologies. In addition to the solutions for the sludge thermal treatment, it will be shown the issue of the phosphorus recovery from sewage sludge, a topical issue that will influence the choices for the sludge disposal in the next years.

scholarly journals Opportunities regarding the use of technologies of energy recovery from sewage sludge

2021 ◽  
Vol 3 (9) ◽  
Author(s):  
Anca Maria Zaharioiu ◽  
Felicia Bucura ◽  
Roxana Elena Ionete ◽  
Florian Marin ◽  
Marius Constantinescu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Energy Recovery ◽  
Alternative Fuels ◽  
Point Of View ◽  
List Type ◽  
Pyrolysis Oil ◽  
Pyrolysis Process ◽  
Pyrolysis Gas ◽  
Bio Oil

Abstract Based on the global need to efficiently eliminate highly produced amounts of sewage sludge, alternative technologies are required to be practically developed. Reduction of sewage sludge waste quantities with energy recovery is the most important and modern practice, with least possible impact on the environment. Appropriate technologies for treating and disposal sewage sludge are currently considered: incineration, gasification and pyrolysis. The main products generated during the pyrolysis process are bio-gas, bio-oil and bio-residue, providing sustainable fuels/ biofuels and adsorbents. Compared to other disposal methods of sewage sludge, pyrolysis has advantages in terms of the environment: waste in small quantities, low emissions, low level of heavy metals. From a technological point of view, pyrolysis is the most efficient in relation to its final products, pyrolysis oil, pyrolysis gas and solid residue that can be transformed into CO2 adsorbent with the help of chemical and thermal activation processes. The incineration process of sewage sludge has a number of disadvantages both environmentally and technologically: organic pollutants, heavy metals, toxic pollutants and ash resulting from combustion that needs a disposal process. A comparison of different types of sewage sludge elimination for the energy recovery is described in the present paper. Article Highlights Sewage sludge is a waste in increasing quantities, which requires disposal and energy recovery, in a clean way for the environment. The pyrolysis process of sewage sludge is the cleanest method of its recovery. Pyrolysis products, bio-oil, syngas and biochar, can be used as alternative fuels to fossil fuels. The pyrolysis process of the sewage sludge is the most advantageous from the point of view of the obtained products and of the environment, in comparison with the incineration and gasification processes.

scholarly journals Yield and biometry of fertilized sugar cane with organomineral fertilizer of sewage sludge and biostimulant

2020 ◽  
Vol 36 (5) ◽  
Author(s):  
Emmerson Rodrigues De Moraes ◽  
Reginaldo De Camargo ◽  
Regina Maria Quintão Lana ◽  
Matheus Henrique Madeiros ◽  
Felipe Garcia Menezes ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Soil Fertility ◽  
Sugar Cane ◽  
Large Scale ◽  
Mineral Fertilizer ◽  
Point Of View ◽  
Mineral Fertilizers ◽  
Mineral Fertilization ◽  
Sugarcane Stem ◽  
Increase Crop Yield

The dependence of mineral fertilizers, increasingly, has brought concern facing the increased demand and because it is a non-renewable mineral resource. The organic fertilization, exclusively, it is impractical in large scale, however, the combination of organic and mineral sources have already proved to be feasible, both from the point of view of nutrition of plants as well as in the aspect of recycling of urban and industrial waste by agriculture. This research had as objective to determine the efficiency of aorganomineral fertilizer formulated on the basis of sewage sludge in substitution of mineral fertilizer in the cultivation of sugar cane in environments with different levels of soil fertility. An experiment was conducted in greater soil fertility, in the Institute Federal Goiano– Campus, Morrinhos-GO, Brazil. The other, less soil fertility, was implanted in the ethanol industry Tijuco Valley, located in Rio do Peixe, district of Prata-MG, Brazil. The experimental design was randomized blocks in a factorial 5 x 2 +1 being five doses, with and without a biostimulant plus an additional with mineral fertilization, in four replications. The doses were in function of fertilization recommendation of planting and coverage for each environment, consisting of: 100 % of the mineral source and percentage 0; 60; 80; 100 and 120 % of organomineral fertilizer. We evaluated the productivity, tillering, diameter and height of stem in Prata-MG the different percentages of the fertilization of planting favored and increased productivity, height and stem diameter of sugar cane; the use of biostimulants not contributed to increase crop yield. In Morrinhos-GO, the different percentage of planting fertilization did not increase the productivity, tillering, height and diameter of the sugarcane stem; the use of biostimulants increases the productivity yield of sugarcane. Organomineral fertilizer based on biosolids is similar to fertilization with mineral fertilizer in environments.

scholarly journals The role of highly silicious rocks in increasing productivity and obtaining ecologically-safe agricultural products

2020 ◽  
Vol 17 ◽  
pp. 00137
Author(s):  
Alevtina Kulikova ◽  
Andrei Kozlov ◽  
Nikolai Zakharov ◽  
Evgeny Yashin ◽  
Natalya Khairtdinova
Keyword(s):  
Heavy Metals ◽  
Crop Yields ◽  
Black Soil ◽  
Agricultural Products ◽  
Middle Volga Region ◽  
Yield Increase ◽  
Siliceous Rocks ◽  
Ulyanovsk Region ◽  
Cultivation Technology

The paper presents results of long-term research on effectiveness of application of highly-siliceous rocks (diatomite and zeolite) in crop cultivation technology in the conditions of leached black soil of the Middle Volga region. Crop yields and content of heavy metals (Zn, Cu, Pb, Cd, Ni) in products are given in two variants: control and variant with introduction of the highly-siliceous rocks into the soil. It has been established that diatomite from Inza deposit and zeolite from Yushanskiy deposit of Ulyanovsk region are highly effective non-traditional fertilizers due to a complex positive effect on the "soil-plant" system. Thus, the yield increase of sugar beet roots amounted to 6.4 t/ha (+23 %) when diatomite was introduced into the soil at the dose of 5 t/ha, barley – 0.93 t/ha (+52 %), spring wheat – 0, 67 t/ha (+42 %). Highly-siliceous rocks with a highly developed specific surface area, possessing unique physicochemical properties, contribute to production of ecologically safe products. At the same time, the intake of heavy metals in agricultural products for some crops and metals decreased by more than 2 times.

Basic investigation on the chemical forms of heavy metals in a sewage treatment plant

2000 ◽  
Vol 42 (9) ◽  
pp. 159-165 ◽  
Author(s):  
H. Morita ◽  
H. Tsuboi
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Energy Resource ◽  
Point Of View ◽  
Raw Material ◽  
Chemical Forms ◽  
Basic Study

Sewage sludge mainly consists of organic matter, and it is rich in nutrients. Therefore, sewage sludge is beneficial as an energy resource and as a raw material for fertilizer. However, heavy metals in it are the obstacle to utilization of sludge. This study was conducted in order to know the chemical forms of heavy metals and their behavior in a sewage treatment plant as a basic study for development of technology to reduce heavy metals in sludge. Chemical methods and biological methods, such as extraction using acid, bacteria leaching, are applied to reduce heavy metals. In using these methods, the efficiency depends on the chemical forms of heavy metals. From this point of view, factors, which affect the chemical forms of heavy metals, were investigated through the survey at some plants of different conditions. Besides, experiments on the anaerobic digestion process, in which the chemical forms of heavy metals were expected to change, were conducted. As the results of these studies, it was found that the chemical forms of heavy metals and their behavior vary according to the species of heavy metals. In comparison of zinc (Zn), copper (Cu) and nickel (Ni), Cu was found to be changed most easily into a stable chemical form such as carbonate and sulfide. Zn was the second to Cu in its tendency to be stabilized. As for Ni, the tendency was further less than Zn.

scholarly journals ACTIVITY OF NITROGEN FIXATION IN LUCERNE AGROCENOSES AND PRODUCTIVITY OF CULTURE UNDER INFLUENCE OF FERTILIZERS AND MICROBIAL PREPARATION

2017 ◽  
Vol 25 ◽  
pp. 43-49
Author(s):  
L. V. Tsentilo
Keyword(s):  
Nitrogen Fixation ◽  
Crop Residues ◽  
Nitrogenase Activity ◽  
Mineral Fertilizer ◽  
Crop Productivity ◽  
Black Soil ◽  
Mineral Fertilizers ◽  
Atmospheric Nitrogen ◽  
Organic Mineral ◽  
Microbial Preparation

In a long field experiment on common black soil, the influence of various fertilization systems and presowing bacterization of seeds on the activity of symbiotic nitrogen fixation in lucerne agrocenoses and crop productivity was studied. Stimulation of the process of fixation of atmospheric nitrogen was observed when mineral fertilizers were used in the doses not exceeding N60P60K60, when they were introduced in the year of sowing. High rates of nitrogenase activity were noted in conditions of aftereffect of manure, compost, organic mineral fertilizer (manure + N30P30K30), as well as systematic use of crop residues in the crop rotation. The plant mass in above variants was characterized by high protein content. At the same time, the greatest influence on protein synthesis was provided by the use of a microbial preparation. The combination of ecologically acceptable agricultural backgrounds with presowing bacterization of lucerne seeds ensured the obtaining of parameters of crop productivity.

scholarly journals Soil Quality and Crop Yields, After Utilization of Sewage Sludge on Agricultural Land, in the Moldavian Plain, Romania

2012 ◽  
Vol 45 (1) ◽  
pp. 5-18 ◽  
Author(s):  
C. Ailincăi ◽  
G. Jităreanu ◽  
D. Bucur ◽  
Despina Ailincăi
Keyword(s):  
Sewage Sludge ◽  
Soil Quality ◽  
Agricultural Land ◽  
Crop Yields ◽  
Agricultural Research ◽  
Zinc Content ◽  
Mineral Fertilizers ◽  
Research Station ◽  
Organic Carbon Content ◽  
Winter Rape

Soil Quality and Crop Yields, After Utilization of Sewage Sludge on Agricultural Land, in the Moldavian Plain, Romania Investigations conducted at the Podu-Iloaiei Agricultural Research Station, Iaşi County, have studied the influence of different sewage sludge rates on yield quality and quantity and soil agrochemical characteristics. Trials were set up in a five year-crop rotation, winter rape-wheat-maize-sunflower-wheat. Sewage sludge was applied every 2 years at rates of 20, 30, 40 and 60 t/ha, with different mineral fertilizer rates, differentiated according to the growing plant. The Cambic Chernozem used for experiments had a clayey-loam texture (410 g clay, 310 g loam and 280 g sand), a weakly acid reaction and a mean supply with mobile phosphorus and a very good one with mobile potassium. Applying rates of 30 t/ha sewage sludge has resulted in the accumulation of mobile phosphate stock in soil of 57 mg/kg and the microelement content, mobile forms from soil, was of 7.9 mg/kg at Cu, 1.4 mg/kg at B, 6.8 mg/kg at Zn and 186 mg/kg at manganese. The combined use of mean rates of mineral fertilizers (N100P80), together with 40 t/ha sewage sludge has resulted in improving soil chemical characteristics and getting yield increases in winter rape of 1854 kg/ha (108 %). After 8 years since the application of a rate of 30 t/ha sewage sludge, soil pH has increased 0.4 units, while phosphorus and potassium content from soil has increased by 30 and 52 mg/ kg soil, respectively. Sewage sludge from the Iaşi Water Treatment Station, which was applied every two years at rates of 20 and 30 t/ha, has determined the increase in the organic carbon content from soil by 2.9 g/kg (18%) and 4.4 g/kg (28%), respectively, compared to the unfertilized variant. The copper and zinc content from grains in wheat and maize crops, fertilized with 30 t/ha sewage sludge, was by two-four times higher, compared to the unfertilized control.

scholarly journals Fertilizer effects on some biochemical characteristics of Helianthus tuberosus l

2019 ◽  
Vol 26 (01) ◽  
pp. 79-84
Author(s):  
Bayarmaa D ◽  
Khureltogoo Kh ◽  
Odgerel B
Keyword(s):  
Control Sample ◽  
Point Of View ◽  
Mineral Fertilizers ◽  
Helianthus Tuberosus ◽  
Biochemical Characteristics ◽  
Tuber Protein ◽  
Organic Mineral ◽  
Mineral Mixtures ◽  
Positive Effect ◽  
Control Samples

In this research, we purposed to study some biochemical characteristics and effects of fertilizers on the accumulation of inulin polysaccharides in the tubers of Helianthus tuberosus L. For this purpose, three types fertilizers of organic, organic-mineral complex and mineral mixed pellets were used, and the inulin polysaccharide content was determined optical density using spectrophotometer in 285 nm light range. The content of the inulin polysaccharide was the highest in control sample to 31.0% and the lowest in mineral mixed pellets fertilizer to 9.9%. From this point of view, mineral mixtures fertilizer negatively affect the accumulation of inulin is polysaccharide. Protein analysis results shows that two variants with mineral-containing fertilizers give more protein content to control samples, particularly, leaf proteins are 5.08% and 4.21% and the tuber protein is 2.79% and 2.37%. It is proved that mineral fertilizers have a positive effect on protein synthesis. Булцуут цэцгийн (helianthus tuberosus l) биохимийн зарим үзүүлэлтэд бордооны нөлөө Хураангуй: Бид энэ удаа Булцуут цэцгийн биохимийн зарим үзүүлэлт болон булцуун дахь инулины полисахаридын хуримтлалд бордооны үзүүлэх нөлөөг судлах зорилго тавилаа. Үүний тулд 3 төрлийн буюу органик, органик-эрдэс нийлмэл, эрдэсхолимог үрлэн бордоонуудаар булцуут цэцгийг бордож ургуулан инулины полисахаридын агууламжийг 285 нм гэрлийн мужид оптик нягтыг нь спектрофотометр ашиглан тодорхойлсон. Инулины полисахаридын агууламж нь хяналтын хувилбар дээр хамгийн өндөр буюу 31.0%, харин эрдэс бордоо хэрэглэсэн хувилбар дээр хамгийн бага буюу 9.9% байв. Эндээс дүгнэхэд эрдэс холимог үрлэн бордоо нь инулины полисахаридын хуримтлалд сөргөөр нөлөөлж байгааг харуулж байна. Харин булцуу болон навчиндуургийн агууламж тодорхойлсон дүнгээс харахад хяналттай харьцуулахад органик-эрдэс нийлмэл бордоогоор бордсон хувилбарт навчны уураг 5.08%, булцууны уураг нь 2.79%, эрдэс холимог үрлэн бордоотойд 4.21%, 2.37%-иар тус тус илүү байна. Энэ нь эрдэс бордоо уургийн нийлэгжилтэнд эерэг нөлөөтэй болохыг харуулж байна. Түлхүүр үг: Инулин, уураг, эслэг, шим тэжээлийн элемент

scholarly journals Research of the Process of Obtaining Organo-Mineral Fertilizer Based on Nitrogen Acid Decomposition of Non-Conditional Phosphorites of Central Kyzylkumes and Poultry Cultivation Waste

2019 ◽  
Vol 8 (12) ◽  
pp. 2260-2265
Keyword(s):  
Material Balance ◽  
Mineral Fertilizer ◽  
Fulvic Acids ◽  
Water Soluble ◽  
Mineral Fertilizers ◽  
Optimal Parameters ◽  
Bird Droppings ◽  
Organic Mineral ◽  
Full Rate ◽  
Nitrogen Phosphorus

The article presents the results of decomposition of substandard phosphorites at a non-full rate of nitric acid (10-50% of stoichiometry on CaO), followed by its processing by bird droppings in various ratios. The optimal parameters for obtaining organic mineral fertilizers are determined, the technological scheme is given and the material balance is calculated, the possibility of obtaining nitrogen-phosphorus-humus fertilizers based on substandard phosphorites and bird droppings is shown, by composition (wt.%): P2O5 total - 6.53; Р2О5 acceptable - 4.04; СаО total - 17.12; N - 4.21; organic matter - 28.38; humic acids - 9,12, fulvic acids - 5,25, water-soluble organic substances - 4,2; pН – 5,93.

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