Experimental investigation of particle number reduction in turbocharged GDI engines

Introduction (problem statement and relevance). Now it is difficult to imagine the automotive industry without constant improvement of the power plant. This is due to the constant tightening of environmental standards, so in environmental standards Euro 6 there is a limit of the countable concentration of particulate matters. To meet the Euro 6 environmental standard, vehicle manufacturers use catalytic converters, and gasoline particle filters (GPF). These methods of reducing the emissions of the exhaust gas are quite common, but they also have a limitation on the service life. The use of only catalytic converters and GPF may not be sufficient to meet the Euro 7 standards in the future. So, there is a need to reduce emissions with exhaust gases by improving the combustion process.The purpose of work is to investigate the combustion process of a turbocharged gasoline direct injection engine to reduce particulate matter by increasing the injection pressure and optimizing the injection timing. Methodology and research methods. The studies are of an experimental nature, the reliability of the data is confirmed by the use of modern measuring equipment and post processing of the measured data. Scientific novelty and results. The fuel injection parameters, which have a significant influence on the particulate matter formation and oxidation are defined.Practical significance. The recommendations to reduce particulate matter formation and to meet the requirements of the future Euro standards are given.

Analysis of the Possibilities for Improving the Environmental Legislation of Kazakhstan

The study describes the results of a study of environmental problems that limit socio-economic development in Kazakhstan. Changes in legislation, management decisions, and strengthening of control over compliance with environmental standards are proposed. The article examines the gaps in the legislative regulation of environmental safety and the policy at the national level. The recommendations outlined in the research will create conditions for ensuring a higher level of environmental protection, introduce a more effective system for the prevention and control of pollution and waste management, which will inevitably lead to a significant step-by-step improvement in the quality of the environment in the medium and long term, and as a result - to reduce the levels of morbidity and mortality, loss and decrease in the working capacity of the population caused by environmental pollution. Such positive social consequences will help reduce the losses in GDP associated with the above factors.

Conflict of Interest Between Regulatory Agencies on Telecommunication Sector And Consequences of Improper Telecommunication Mast Installation in Nigeria

This paper examines various laws governing telecommunication installations in Nigeria with a view to addressing the perceived shortcomings in the laws. While the National Environmental Standards Regulatory and Enforcement Agency Act (NESREA Act) and the National Communications Commission (NCC Act) have been enacted to solve the problems associated with the effects of telecommunication mast installation in public places, the outcome of these laws seem inadequate for failure to provide effective means of enforcing same. The study considered the provisions of NESREA Act which is the principal Law enacted for ensuring that environ- mental standards are maintained and protected in Nigeria and the provisions of NCC Act which is the law that establishes the principal body which regulates telecommunication installations in Nigeria as well as other legislations. While NESREA in its Regulation provided for a setback of 10 metres, the NCC Act provided for a setback of 5 metres, which often conflicts and put victims at disadvantage and also conflict between the two regulatory bodies. It was observed that serious environmental hazards are linked to installation of tele- communication masts within/close to residential premises. Among these are leukemia, cancer, cracks on the buildings, pollution, such as water, land and air. The problems also include telecommunication masts falling on buildings and sometimes death due to sub- standard materials used in the installation as against the stated standard by the controlling regulatory bodies.

EXPERT SYSTEM FOR SHIP RECYCLING

Ship recycling has been considered as a low technology industry. It has been established that there are more than a dozen stake holders in ship recycling having their own interests and roles. Apart from this, most of the ship recycling activities are carried out with poor infrastructure support and without adhering to proper safety and environmental standards. A Knowledge-based support is the need of the hour for improving the status of ship recycling industry. Knowledgebase support in the form of a computer based expert system encompassing entire ship recycling activities is considered as a very useful step in this direction. This paper presents the need for a user friendly expert system for ship recycling process. Two important functions of the expert system have been presented, one for the Administrators, the stake holders at the helm of the ship recycling affairs and second one for the Users, who execute the actual dismantling have been presented.

Comparative characteristic of atmospheric air quality on the right-bank and left-bank parts of Ulyanovsk

The investigation was carried out on the basis of analysis of data from stationary monitoring stations for atmospheric pollution during two-year period (2020-2021) and the city's zoning scheme. As a result of the investigation priority pollutants were identified for the right-bank and left-bank parts of Ulyanovsk. According to the list of priority pollutants, a number of prospective sources of these emissions were identified. Key words: stationary observation posts, priority pollutants, pollution sources, mobile posts, environmental standards.

Phosphorus Retention of a Permeable Reactive Barrier Surpassed by an Unvegetated Artificial Pond

An artificial pond bisected by a phosphorus (P) retentive permeable reactive barrier (PRB) alongside Forrest Highway, Coolup, Western Australia was designed to remove P from farmland runoff. The pond bed was made of subsoil and road construction materials likely to have a relatively high P sorption capacity, and there was no vegetation in the bed of the pond. Flow through the pond was intercepted by the PRB, constructed from a mixture of sand, coarse crushed limestone, and bauxite residue (with 10% phospho-gypsum). The effectiveness of P removal and the impact of the PRB was measured by comparing the concentration of contaminants immediately either side of the PRB with established standards, and against background levels in runoff from surrounding farmland. Using coarse limestone to increase flow through the PRB failed where permeability was insufficient to avoid overtopping of the PRB and the wall had to be lowered to allow by-pass and avoid collapse. The PRB was effective in removing total P (TP); however, the influent TP concentration was low (mean 0.19 mg L -1 ) because most P entering from farmland was retained in the shallow pond upstream of the PRB. Despite this, TP removal by the PRB was 53% (2009–2012). Occasionally, in spring when the pond was stagnant and anaerobic, P was released from the PRB. This minor P release coincided with a minor release of iron, consistent with anaerobic conditions found in the PRB. Although not designed to do so, the shallow pond upstream of the PRB reduced the TP concentration from farmland by 85% (mean 1.26 mg L -1 down to 0.19 mg L -1 ), mainly by reducing filterable reactive P concentration. Some elements (arsenic, cobalt, conductivity, fluoride, manganese, molybdenum, pH, selenium, uranium and vanadium) were increased by flow through the PRB, but were low relative to surrounding waters and environmental standards

Reverse Osmosis Treatment of Wastewater for Reuse as Process Water—A Case Study

The aim of this work was to purify mixed wastewater from three different production processes in such a manner that they could be reused as process water. The maximum allowed concentrations (MAC) from the Environmental Standards for emissions of substances released into surface water were set as target concentrations. Wastewaters contained solid particles, sodium, aluminium, chloride, and nitrogen in high amounts. Quantitatively, most wastewaters were generated in the production line of alumina washing. The second type of wastewater was generated from the production line of boehmite. The third type of wastewater was from regeneration of ion exchangers, which are applied for feed boiler water treatment. The initial treatment step of wastewater mixture was neutralisation, using 35% HCl. The precoat filtration followed, and the level of suspended solids was reduced from 320 mg/L to only 9 mg/L. The concentrations of ions, such as aluminium, sodium and chlorides remained above the MAC. Therefore, laboratory reverse osmosis was applied to remove the listed pollutants from the water. We succeeded in removal of all the pollutants. The concentration of aluminium decreased below 3 mg/L, the sodium to 145 mg/L and chlorides to 193 mg/L. The concentration of nitrate nitrogen decreased below 20 mg/L.

Heat recovery in the refrigeration equipment of dining cars

The paper investigates the major parameters of the existing refrigeration equipment of dining cars, as well as analyzes the latest trends in the development of refrigeration equipment, taking into account the changing requirements of legislation and environmental standards. Besides, it compares several systems with different refrigerants. Finally, our study introduces the possibilities of exploiting a transcritical system with heat recovery.

Mining Corruption and Environmental Degradation in Indonesia: Critical Legal Issues

<div><table cellspacing="0" cellpadding="0" align="left"><tbody><tr><td align="left" valign="top"><p class="AbstractText">Indonesia has enacted mining law, environmental protection law, and a number of rules addressing mining and environmental issues. However, the establishment of these numerous laws and regulations has not resulted in a decline in corruption cases and environmental degradation. In fact, government officials are frequently lenient with mining industry owners who fail to follow good environmental standards. This is critical since Indonesia has spent the last two decades attempting to resolve corruption and environmental challenges. This study describes specific instances of mining and environmental law confusion resulting from corrupt activities. The study takes a normative legal approach. Resources have been gathered through examinations of mining and environmental laws and regulations, as well as reports by multiple authorities that track the same subject. The study demonstrates how prior Indonesian mining law policy acknowledged regional governments as mining authorities. The policy has caused widespread mining corruption, particularly in the area of business permits, involving regional political leaders and the private sector. The irresponsibility of regional political elites has jeopardized the environment and ecosystem. It is also an echo of overlapping legislation and authorities in the mining and environmental sectors.</p></td></tr></tbody></table></div>