Aeration Method Research Articles

Rational budgeting approach as a nutrient management tool for mixed crop-swine farms in Korea.

ObjectiveDue to rapid economic return, mixed crop-swine farming systems in Korea have become more intensive. Intensive farming practices often cause nutrient surpluses and lead to environmental pollution. Nutrient budgets can be used to evaluate the environmental impact and as a regulatory policy instrument for nutrient management. This study was conducted to select a nutrient budgeting approach applicable to the mixed crop-swine farms in Korea and suggest an effective manure treatment method to reduce on-farm nutrient production.MethodsIn this study, we compared current and ideal gross nutrient balance (GNB) approaches of Organisation for Economic Co-operation and Development and soil system budget (SSB) approach with reference to on-farm manure treatment processes. Data obtained from farm census and published literature were used to develop the farm nutrient budgets.ResultsThe average nitrogen (N) and phosphorus (P) surpluses were approximately 11 times and over 7 times respectively higher in the GNB approaches than the SSB. After solid-liquid separation of manure, during liquid composting a change in aeration method from intermittent to continuous reduced the N and P loading about 50% and 47%, respectively. Although changing in solid composting method from turning only to turning+aeration improved the N removal efficiency by 30.5%, not much improvement in P removal efficiency was observed.ConclusionAlthough the GNB approaches depict the impact of nutrients produced in the mixed crop-swine farms on the overall agricultural environment, the SSB approach shows the partitioning among different nutrient loss pathways and storage of nutrients within the soil system; thus, can help design sustainable nutrient management plans for the mixed crop-swine farms. The study also suggests that continuous aeration for liquid composting and turning+aeration for solid composting can reduce nutrient loading to the soil.

Effect of intermittent aeration mode on nitrogen concentration in the water column and sediment pore water of aquaculture ponds

Nitrogen in pond sediments is a major water quality concern and can impact the productivity of aquaculture. Dissolved oxygen is an important factor for improving water quality and boosting fish growth in aquaculture ponds, and plays an important role in the conversion of ammonium-nitrogen (NH4+-N) to nitrite-nitrogen (NO2−-N) and eventually nitrate-nitrogen (NO3−-N). A central goal of the study was to identify the best aeration method and strategy for improving water quality in aquaculture ponds. We conducted an experiment with six tanks, each with a different aeration mode to simulate the behavior of aquaculture ponds. The results show that a 36 hr aeration interval (Tc = 36 hr: 36 hr) and no aeration resulted in high concentrations of NH4+-N in the water column. Using a 12 hr interval time (Tc = 12 hr: 12 hr) resulted in higher NO2−-N and NO3−-N concentrations than any other aeration mode. Results from an 8 hr interval time (Tc = 8 hr: 8 hr) and 24 hr interval time (Tc = 24 hr: 24 hr) were comparable with those of continuous aeration, and had the benefit of being in use for only half of the time, consequently reducing energy consumption.

Orbitally Shaken Single-Use Bioreactor for Animal Cell Cultivation: Fed-Batch and Perfusion Mode.

Increasing the cultivation volume from small to large scale can be a rather complex and challenging process when the method of aeration and mixing is different between scales. Orbitally shaken bioreactors (OSBs) utilize the same hydrodynamic principles that define the success of smaller-scale cultures, which are developed on an orbitally shaken platform, and can simplify scale-up. Here we describe the basic working principles of scale-up in terms of the volumetric oxygen transfer coefficient (kLa) and mixing time and how to define these parameters experimentally. The scale-up process from an Erlenmeyer flask shaken on an orbital platform to an orbitally shaken single-use bioreactor (SB10-X, 12 L) is described in terms of both fed-batch and perfusion-based processes. The fed-batch process utilizes a recombinant variant of the mammalian cell line, Chinese hamster ovary (CHO), to express a biosimilar of a therapeutic monoclonal antibody. The perfusion-based process utilizes either an alternating tangential flow filtration (ATF) or a tangential flow filtration (TFF) system for cell retention to cultivate an avian cell line, AGE1.CR.pIX, for the propagation of influenza A virus, H1N1, in high cell density. Based on two example cell cultivations, processes outline the advantages that come with using an orbitally shaken bioreactor for scaling-up a process. The described methods are also applicable to other suspension cell lines.

Effect of aeration method on organic matter degradation and ammonia emission of composting in a laboratory-scale reactor

Maintaining proper aerobic conditions is a crucial factor in composting. Positive aeration (PA, blowing) has been widely applied but diffuses the odorous exhaust gas to the atmosphere. Negative aeration (NA, suction) enables to minimize the gas diffusion, but NA has scarcely been applied mainly because there has been no clear answer about the advantage in the organic matter degradation rate in this system. The air in the PA flows from the higher temperature zone (inside the pile) to the lower temperature zone (the top of the pile), while the air in the NA flows in the opposite direction. We hypothesized that the water vapor and NH3 gas produced in the high-temperature zone of PA was more likely to be transported and absorbed/adsorbed in the lower temperature zone than that of NA, which could influence microbial activity during composting. This study quantitatively evaluated the effect of two aeration methods on organic matter degradation during composting. We examined the effect of absorption/adsorption of NH3 on the compost by preventing the compost from drying. We found that PA indeed tended to accumulate more NH3 than NA but did not show large differences, consequently having little influence on the organic matter degradation.

Recovery of Ni(II) from real electroplating wastewater using fixed-bed resin adsorption and subsequent electrodeposition

Effective recovery of high-value heavy metals from electroplating wastewater is of great significance, but recovering nickel ions from real electroplating wastewater as nickel sheet has not been reported. In this study, the pilot-scale fixed-bed resin adsorption was conducted to recover Ni(II) ions from real nickel plating wastewater, and then the concentrated Ni(II) ions in the regenerated solution were reduced to nickel sheet via electrodeposition. A commercial cation-exchange resin was selected and the optimal resin adsorption and regeneration conditions were investigated. The resin exhibited an adsorption capacity of 63 mg/g for Ni(II) ions, and the average amount of treated water was 84.6 bed volumes (BV) in the pilot-scale experiments. After the adsorption by two ion-exchange resin columns in series and one chelating resin column, the concentrations of Ni(II) in the treated wastewater were below 0.1 mg/L. After the regeneration of the spent resin using 3 BVof 4% (w/w) HCl solution, 1.5 BV of concentrated neutral nickel solution (>30 g/L) was obtained and used in the subsequent electrodeposition process. Using the aeration method, alkali and water required in resin activation process were greatly reduced to 2 BV and 3 BV, respectively. Under the optimal electrodeposition conditions, 95.6% of Ni(II) in desorption eluent could be recovered as the elemental nickel on the cathode. The total treatment cost for the resin adsorption and regeneration as well as the electrodeposition was calculated.

ОЦІНКА ЯКОСТІ ВОДИ ПІДЗЕМНИХ ДЖЕРЕЛ ВОДОПОСТАЧАННЯ РІВНЕНСЬКОЇ ОБЛАСТІ

Проаналізовано показники якості артезіанської води з свердловин,розташованих в різних населених пунктах Рівненщини; окресленотенденції якісного стану підземних артезіанських горизонтів; обґрунтовано рекомендації щодо водопідготовки залізовмісних вод.Наведено фізико-хімічний склад води з підземних горизонтів різних населених пунктів Рівненщини.

The Characteristics of Carbon, Nitrogen and Sulfur Transformation During Cattle Manure Composting-Based on Different Aeration Strategies.

This study aimed to investigate the characteristics of gaseous emission (methane—CH4, carbon dioxide—CO2, nitrous oxide—N2O, nitric oxide—NO, hydrogen sulfide—H2S and sulfur dioxide—SO2) and the conservation of carbon (C), nitrogen (N), and sulfur (S) during cattle manure composting under different aeration strategies. Three aeration strategies were set as C60, C100, and I60, representing the different combinations of aeration method (continuous—C or intermittent—I) and aeration rate (60 or 100 L·min−1·m−3). Results showed that C, N, S mass was reduced by 48.8–53.1%, 29.8–35.9% and 19.6–21.9%, respectively, after the composing process. Among the three strategies, the intermittent aeration treatment I60 obtained the highest N2O emissions, resulting in the highest N loss and greenhouse gas (GHG) emissions when the GHG emissions from power consumption were not considered. Within two continuous aeration treatments, lower aeration rates in C60 caused lower CO2, N2O, NO, and SO2 emissions but higher CH4 emissions than those from C100. Meanwhile, C and N losses were also lowest in the C60 treatment. H2S emission was not detected because of the more alkaline pH of the compost material. Thus, C60 can be recommended for cattle manure composting because of its nutrient conservation and mitigation of major gas and GHG emissions.

Phytoremediation of tofu wastewater using Eichhornia crassipes

The tofu industry in Indonesia is generally dominated by small industries so that the wastewater produced is not properly managed. The tofu industries generally produce wastewater from the washing, pressing, and molding process. Phytoremediation can be used as an alternative solution for tofu wastewater remediation process because of its advantages as a cost-effective, efficient, and eco-friendly technology. This research used parallel reactor with circulation flow. Eichhornia crassipes with 1500 gram/compartment was used as the growing medium. The variables used in this study is the phytoremediation treatment and phytoremediation time. Phytoremediation treatment variations used anaeration and aeration methods for 10 days. The results of this study showed that the effectiveness of the average decrease in the two treatments; (1) anaeration treatment could reduce BOD 59.84%, COD 58.95%, TSS 86.79% and ammonia 25.43%, (2) aeration treatment could reduce BOD 80.67%, COD amounting to 78.28%, TSS 65.79% and ammonia 49.79%. Percentage of absorption of pollutant levels (BOD, COD, TSS, ammonia) in tofu wastewater increases with increasing phytoremediation time and number of compartments. According to the effectiveness value, aeration treatment was the most effective treatment in reducing the levels of tofu wastewater pollutants.

Effect of Biochar on Ammonia Volatilization in Saline-Alkali Soil

In order to investigate the effect of biochar on NH3 volatilization in saline-alkali soils of the Yellow River Delta, continuous laboratory incubation was conducted. Firstly, the recovery rate of NH3 volatilization by an improved aeration method was determined, the effects of fertilizer particles and aqueous fertilizer solution on NH3 volatilization were then compared. Finally, the effects of biochar species, application amount, and fertilizer type on NH3 volatilization rate and total amount were explored. The results showed that the average recovery rate of NH3 reached 100.30% using ammonium sulfate as the nitrogen source. With the same rate of nitrogen application, the volatilization of NH3 decreased by 60.29% in the treatment with urea as the aqueous solution compared to the treatment with urea particles, and decreased by 61.40% in the treatment with an ammonium sulfate aqueous solution compared to the treatment with ammonium sulfate particles. Compared with the control treatment (without the addition of biochar and with the addition of ammonium sulfate solution), the addition of 0.5% biochar derived from 300℃ rice biochar (RB-300), 600℃ rice biochar (RB-600), 300℃ cotton biochar (CB-300), and 600℃ cotton biochar (CB-600) reduced the total volatilization of NH3 by 18.68%, 16.16%, 9.35%, and 8.26% respectively. The volatilization rate of NH3 was at its highest within two days of fertilization, which accounted for 53.80%-64.02% of the total volatilization. After the addition of the biochar, volatilization of NH3 decreased at first and then increased in proportion to an increase in biochar content. Therefore, adding a small amount of biochar before field fertilization, combined with the integrated management of water and fertilizer, can effectively reduce NH3 volatilization and improve nitrogen use efficiency.

Disease suppressiveness of agricultural greenwaste composts as related to chemical and bio-based properties shaped by different on-farm composting methods

On-farm composting is suitable to recycle agricultural biomasses in mature and stable organic matter that can be applied to improve the general soil conditions, such as physical, chemical, hydro-physical, texture, and refresh the provided ecosystem services for human well-being. Quality compost have a high potential in sustaining plant health through disease suppressiveness mechanisms against soil-borne pathologies; however, this property needs to be standardized. In this work, leafy vegetable/chipped energy cardoon residues have used as common starting feedstock in three comparative composting piles differentiated for the aeration method (passive, active and manual turning). Compost from both passively and actively aerated static piles showed higher suppressive properties against Lepidium sativum damping-off caused by Rhizoctonia solani and Sclerotinia minor. The enhanced suppressiveness was found associated to increased population levels of fungi and bacteria, combined with larger microbial activity and catabolic diversity. Compost community levels of physiological profiles were distributed within PCA biplots according to the gradient of suppressiveness and, putatively, their C-food bioavailability degree. The observed differences in stimulation and selection of microbiota may be related to specific molecular compost features. The two suppressive compost revealed either a distinct lipid composition, assessed by thermochemolysis and to the preservation of readily biodegradable molecules by lignocellulosic components, as detected in NMR analyses. Findings indicate the relevance of on-farm composting methods in shaping compost suppressive functions and give new information about the provisioning of bio-based products for sustainable plant disease management.

Dynamic aeration for improved oxygen mass transfer in the wastewater treatment process

Wastewater treatment is responsible for about 1% of the total electric energy consumption in developed countries. The dynamic aeration method, which applies oscillations to the gas flow, shows a high potential for increase of oxygen mass transfer and energy efficiency of the biological wastewater treatment process. We investigated the mass transfer of pulsed aeration modes in comparison to constant flow aeration in a test geometry in a numerical study. The effects of flow rate, pulsation frequency, bubble size and injection depth on mass transfer were studied. Gas was pulsated with a square wave pattern in on/off mode for the application in aeration basins of wastewater treatment plants. A geometry with up to 4 m aeration depth was investigated. The air supply was pulsed with frequencies in the range of 0.1–4 Hz. An increase of oxygen mass transfer rate by up to 24% is determined compared to continuous aeration. Moreover, comparable mass transfer rates are achieved for lower gas mass flow rates during pulsation. Thus, air demand in compression and energy consumption can be reduced when dynamic aeration is applied. The oxygen transfer efficiencies derived from the simulations are in good agreement with the experimental results from Alkhalidi et al. (2016).

Aeration and Shear Stress Are Critical Process Parameters for the Production of Oncolytic Measles Virus.

Oncolytic Measles virus is a promising candidate for cancer treatment, but clinical studies have shown that extremely high doses (up to 1011 TCID50 per dose) are required to effect a cure. Very high titers of the virus must therefore be achieved during production to ensure an adequate supply. We have previously shown that Measles virus can be produced in Vero cells growing on a Cytodex 1 microcarrier in serum-containing medium using a stirred-tank reactor (STR). However, process optimization and further process transfer or scale up requires the identification of critical process parameters, particularly because the use of STRs increases the risk of cell damage and lower product yields due to shear stress. Using a small-scale STR (0.5 L working volume) we found that Measles virus titers are sensitive to agitator-dependent shear, with shear stress ≥0.25 N m−2 reducing the titer by more than four orders of magnitude. This effect was observed in both serum-containing and serum-free medium. At this scale, virus of titers up to 1010 TCID50 mL−1 could be achieved with an average shear stress of 0.1 N m−2. We also found that the aeration method affected the virus titer. Aeration was necessary to ensure a sufficient oxygen supply to the Vero cells, and CO2 was also needed to regulate the pH of the sodium bicarbonate buffer system. Continuous gassing with air and CO2 reduced the virus titer by four orders of magnitude compared to head-space aeration. The manufacture of oncolytic Measles virus in a STR can therefore be defined as a shear-sensitive process, but high titers can nevertheless be achieved by keeping shear stress levels below 0.25 N m−2 and by avoiding extensive gassing of the medium.

Study on the purification effect of aeration-enhanced horizontal subsurface-flow constructed wetland on polluted urban river water.

The issue of urban river pollution has attracted great attention due to high concentrations of ammonia nitrogen (NH4+-N) and low concentrations of dissolved oxygen (DO) in polluted water bodies. In order to investigate the effects of aeration-enhanced horizontal subsurface-flow constructed wetlands on polluted river water, unaerated aeration (NA), continuous aeration (CA), and intermittent aeration (IA) constructed wetlands were established. The purification effects of the wetland on various pollutants and the form of effluent nitrogen, influences of temperature on the removal rates of pollutants, the change of redox potential-oxidation reduction potential (ORP)-and the difference of dissolved oxygen (DO) between influent and effluent were investigated. The results indicated that aeration enhancement can improve the purification efficiencies of chemical oxygen demand (COD) and NH4+-N in constructed wetlands. The purification efficiencies of TN in IA and CA constructed wetlands were 91.9% and 53.7%, respectively, indicating that IA is the optimized aeration method for removal of various pollutants in wetlands. Changes of DO and ORP in effluent under IA and CA suggested improvement of aeration on the water environment. Meanwhile, DO was more sensitive to temperature compared with ORP. Additionally, a study of the nitrogen content in effluent suggested that the aeration method had a significant influence on the nitrogen content in effluent. The removal rates of both NH4+-N and TN degraded as the temperature dropped. The results also demonstrated that the removal rate of NH4+-N under aeration condition was more sensitive to temperature than that under NA condition and the effect of temperature on the removal rate of NH4+-N was greater than that of TN.

Effect of pure oxygen aeration on extracellular polymeric substances (EPS) of activated sludge treating saline wastewater

This study aimed to investigate the effects of pure oxygen aeration on extracellular polymeric substances (EPS) of activated sludge treating saline wastewater in a sequencing batch reactor (SBR). Activated sludge with pure oxygen aeration was more effective for TOC removal than that with air aeration when salinities were less than 3.0%. The soluble microbial products (SMP) concentrations with pure oxygen aeration were higher at low salinities (0.5%, 1.0%), while the opposite occurred at high salinities (2.0%, 3.0%, 4.0%). The EPS concentrations of the two aeration methods were similar when salinities were at 0.5% and 1.0%, while higher amount of total EPS would be produced in pure oxygen aeration reactor when the salinities were above 2.0% (p＜0.05). The fluorescence peaks in both loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS) of activated sludge with pure oxygen aeration at 3.0% salinity were attributed to tryptophan PN-like substances and humic acid-like substances. The sludge volume index (SVI) showed linear correlations with EPS (R2 = 0.9057), PN (R2 = 0.9741) and PS (R2 = 0.8833) at 3.0% salinity, respectively. In pure oxygen aeration system, SVI was more sensitive with EPS and PN, which may worsen settling performance of the sludge.

Effect of Air Hole Diameter in Circular Conduits for Air Injection

The oxygen concentration in water is a prime indicator of the water quality for human life aquatic biota. The physical process of oxygen transfer or oxygen absorption from the atmosphere acts to replenish the used oxygen. This process is called re-aeration or aeration. Many hydraulic structures are used for aeration. Gated conduit aeration is a method of aeration that has become popular in recent years. In this study, the effect of air hole diameter in circular conduits for air injection was investigated. It is observed that increment in the diameter of air hole caused a rise in Qa/Qw. Additionally, results proved that the diameter of air hole plays an important role in the air injection of circular conduits. Moreover, a regression equation is obtained for air injection rate. For this aim, genetic expression programming, a recently developed artificial intelligence technique, is used. The model equation showed high correlation coefficient and low minimum square error value.

On a new calculation method of sludge mixture aeration and mixing processes in the aeration tanks of the wastewater biological treatment stations

AbstractThis paper provides the results of theoretical and experimental research of sludge mixture aeration and the mixing processes in the aeration tanks. For the oxygen mass transfer process in the dynamic two‐phase water–air system formed during aeration, equations were obtained to determine the depletion coefficient of the gas phase in an emerging air bubble, KD, and the change in the dissolved oxygen concentration in the liquid phase, taking this coefficient into account. For the mixing process using an air‐distribution device, the equation was obtained to determine the velocity of the ascending water–air mix stream formed over this device. The proposed equations allow for the optimization of the design and operation of the pneumatic aeration systems used in wastewater biological treatment stations.

Treatment of Shallow Groundwater Quality for Non-potable Use: A Case Study in Parit Raja, Batu Pahat, Johor

Groundwater becomes an alternative water resource to meet up the demand of clean water in our country. Unfortunately, several contaminants could present in groundwater make it unsafe for domestic used and drinking water purpose. Therefore, groundwater should be treated to acceptable level before it can be consumed for further use. The aim of this study was to improve the groundwater quality in terms of physical parameters and bring it within the acceptable level using simple and economical aeration and filtration methods. Gravel, ceramic and charcoal were used as filter materials. The removal efficiency was determined from the calculated percentage removal of the tested parameters. Based on the results, groundwater showed improvement in its physical quality with percentage removal of turbidity, BOD and COD at 92%, 73% and 79%, respectively. Parameter pH also showed good improvement from slightly acidic to neutral range. However, TDS gave different results. With the exception of TDS, all parameters comply with the Malaysia’s standard of raw and drinking water quality set by Ministry of Health.

Study on Nitrification Characteristics of Livestock Wastewater Treated With SBR

By coupling intermittent characteristics of livestock wastewater and intermittent operation of SBR, the feasibility of using intermittent aeration to reduce energy consumption of livestock wastewater treatment facilities was studied. SBR was utilized to treat livestock wastewater pretreated by the anaerobic process. A systematic study of the start-up of nitrification in SBR using the novel aeration method and the influence of aeration rate and aeration time on nitrification performance was carried out. The results showed that the removal of NH4+-N could be achieved under different operating conditions. DO concentration was the dominant factor affecting the nitrification process. Under the operation condition of stage 3 (i. e. aeration rate 0.8 L/min, temperature 25 °C, aeration time 12 h). Because of the lack of carbon source, the removal rate of TN decreased, and a certain degree of accumulation of NO3--N occurred. Through monitoring the DO, pH and Eh, the results indicated that the Eh curves varied irregularly. However, DO and pH in one operating cycle showed obvious patterns and corresponded well with the nitrification process, so they could be used as real-time control parameters to control the nitrification aeration process.

Processing Of Tofu Industrial Liquid Waste With Aeration And Adsorption Combined Methods In Reducing Levels Of Bod, Cod And Tss In Tofu Industry Pela Mampang, Mampang Prapatan Sub-District - South Jakarta 2018

Liquid waste from tofu production is generated from the washing, boiling, pressing and molding process. Liquid waste disposal from tofu production have temperature of 37-45°C, turbidity of 535-585 NTU, TSS, ammonia of 23.3-33.5 mg/L, BOD of 6000-8000 mg/l and COD of 7500-8400 mg/l. One of the techniques for the liquid waste processing from tofu production is aeration and adsorption. The purpose of this research is to know the combination of aeration and adsorption method in decreasing of BOD, COD and TSS in tofu wastewater at Pela Mampang tofu factory in Mampang subdistrict, South Jakarta in 2018. This research type is quasi experiment research, with research design of One Group Pre Test and Post Test Design. The sample of this research is tofu wastewater at Pela Mampang tofu factory in Mampang subdistrict, South Jakarta in 2018 with replication 5 times in each variation of contact time 20 minutes, 40 minutes, 60 minutes, 80 minutes and 100 minutes with observation parameters are BOD, COD and TSS. The results of the initial examination of BOD were 6244 mg/l, COD 33800 mg/l, and TSS 7100 mg/l. After being treated with a combined method of aeration and adsorption the BOD levels decreased to 4300.4 mg/l, COD 19283.6 mg/l, and TSS 5246.6 mg/l. There is a significant relationship between the time of treatment and reduction of BOD levels by 56.8%, while COD and TSS have no significant relationship.

COMPARATIVE INDICATORS OF IRON AND MANGANESE CONTENT IN THE HAIR OF WOMEN LIVING IN THE NORTHERN REGION WITH DIFFERENT TREATMENT OF DRINKING WATER

Aim: to study the concentration of Fe and Mn in the hair of women living in the cities of Khanty-Mansiysk Autonomous Region (KHMAO) with different treatment of drinking water. Methods. The ultimate composition of hair of 106 women (average age 38,9+11,3 g) - residents of the Northern region, not employed in the manufacturing sector was studied. 50 of them lived in the cities of Nefteyugansk and Nyagan and 56 - in the cities of Surgut and Khanty-Mansiysk. In the cities of Surgut and Khanty-Mansiysk underground water undergoes non chemical treatment, iron removal by the method of deep aeration and decontamination on UV irradiation installations. In the cities of Nefteyugansk and Nyagan water from artesian wells is decontaminated only by baclor. Results. The women living in the cities of Nefteyugansk and Nyagan had significantly higher (p < 0,001) and higher than reference values of Fe (82,3 + 11,4 mkg/g - the norm 7-40) and Mn (11,3 + 1,9 mkg/g - the norm 0,15-2,0) concentrations in the hair compared to women living in cities with high-quality purification of drinking water: Fe (23,6 + 2,2 mkg/g) и Mn (3,1 + 0,2 mkg/g). Iron, getting in to the organism with other pollutants (dietary Fe excess is not negative) also shows the properties of the immunosuppressant. Manganese is considered to be vital and at the same time a toxic element with mutagenic activity and tendency for accumulation. We can assume the best resistance to the adverse effects of oxidative stress in women-residents of KHMAO cities with optimal treatment of drinking water. Conclusions: To correct the microelement status of the Northern region population it is necessary to carry out more research of the environmental objects (in particular water) on the content of heavy metals, pay special attention to quality control of drinking water, and to use the method of microelement status determination of the hair chemical composition as an additional method of assessment of the internal body environment.