BASIS OF RATIONAL MUNICIPAL WASTE MANAGEMENT IN RURAL FARMSTEADS

The paper presents the most important problems of waste management in rural areas against the background of formal and legal requirements. It also includes quantitative and qualitative characteristics of waste generated in rural homesteads. Quantitative characterization was based on literature data and the results of the author’s own research, within which an indicator of the accumulation of waste in selected regions of Mazowieckie and Świętokrzyskie was determined. Accurate knowledge of the characteristics of the waste and its variation is the basis for planning and development of waste management. The collected data show clear evidence of a significant increase in both the rate of volume and weight, which depends on many factors, eg. the type of building, season etc. In addition, the basic principles of proper model of waste management, selective waste collection guidelines and principles of best practice of waste management in rural areas were presented

The Impact of Selected Sewage Treatment Methods on the Change in Parameters of Sewage Sludge Originating from Municipal Sewage Treatment Plants

Sewage sludge is produced in every sewage treatment plant and its properties depend on a number of factors. Type, origin and parameters of treated sewage and the applied treatment technology are the main factors influencing sludge properties. Produced sewage sludge can be submitted to treatment processes which condition its final use. For example sludge produced in small treatment plants, treating mainly domestic sewage, can be used for agricultural purposes. This paper presents the results of own research on the susceptibility of sludge originating from several municipal sewage treatment plants to selected treatment processes and changes in properties as a result of carried out processes. The obtained results confirm that the ultrasonic field as a physical method of sewage sludge modification is a factor intensifying the drainage processes. In most cases, the investigations have shown better results of the dewaterability of sludge treated with ultrasonic field in relation to raw sediments. For the tested sediments, it is justified to use the centrifugation process as a method of mechanical compaction

Methodical basis of the needs of water supply in rural areas in normal and special conditions

When calculating the balance of water supply, the purpose for which water is intended should be taken into account. Depending on them, the water quality parameters may vary. Rural and agricultural water demand covers the basic types of water demand, including the population's living and economic needs, animal husbandry, the needs of public utilities, the needs related to the operation of vehicles and machinery, workshops, machines and other purposes, including the own needs of the water pipes, fire-fighting etc. The level of demand is also closely related to the factors influencing the level of individual water consumption. Taking into account the deficiencies in formal and legal regulations, the binding regulations concerning the operation of water supply systems in special conditions have been presented so far. Elements of the benchmarking study on unit water demand indicators in normal and special conditions in rural areas have also been taken into account, guided by the principles and numerical indicators for the calculation of water demand for drinking and business purposes

The effect of sodium percarbonate dose on the reduction of organic compounds in landfill leachate

The paper discusses the issue of using classic Fenton’s reagent modification for pre-treatment of leachate from a landfill in Janczyce (Świętokrzyskie Voivodeship, Poland) – sodium percarbonate (2Na2CO3·3H2O2) was used as an alternative source of hydrogen peroxide, and hydrated iron sulphate ((II) FeSO4·7H2O) was the source of iron ions. The tests were carried out at initial process pH = 3, for different doses of the Fe2+ catalyst (ranging within 100÷5400 mgFe/L), and for mass ratio iron (II) to sodium percarbonate – 1:3. Three doses were selected after this stage, for which the following parameters were examined: the effect of initial process pH ranging between 2 and 4, the effect of oxidation process duration (30÷150 min.), and the effect of the ratio Fe2+ to sodium percarbonate (1:3, 1:5 and 1:7). The values of selected parameters (pH, COD, TOC) in leachates, both before and after the treatment process have been determined according to applicable standards. Completed tests have proven, inter alia, that the proposed implementation of the Fenton’s method with sodium percarbonate may be an effective alternative for hydrogen peroxide as an oxidiser; with an increasing dose of the 2Na2CO3.3H2O2, the improvement in landfill leachate remediation efficiency measured by decreasing TOC and COD values reaches certain extent only; the process modified with sodium percarbonate may be effective already at pH=4