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Determination of the composter volume required for garden grass treatment

100%

Stejskal B.

Infrastruktura i Ekologia Terenów Wiejskich

2013

nr 2/IV

The paper presents results from an experiment focused on the establishment of total grass biomass amount grown in the house garden during the growing season and volume of the domestic composter required for biomass treatment. Grass in the experimental part of the garden (area 43.75 m2) was cut at regular intervals (1x2 weeks) during the growing season. The cut green biomass was mixed with wood shavings at a volume ratio of 3:1 and the mixed material was placed inside a home composter (volume 300 dm3). During the composting process, the blended biomass was mixed and aerated for 1x4 weeks. The total amount of grass biomass from the experimental plot was 44.8 kg; the amount of added wood shavings was 13.9 kg. The total volume of raw mixture (fresh) was nearly 370 dm3 but due to the composting process during the growing season, the volume of composted raw materials was reduced at the end of the growing season to about 168 dm3. The measured and calculated values show that the composter volume required for the treatment of grown-up and cut grass biomass per 1m2 of garden lawn is 3.83 dm3. Due to fluctuations of grass biomass production in individual years, it is recommended to increase the required composter volume to 4 dm3 per 1m2 of garden lawn.

Change of physical properties of biodegradable waste during decomposition

84%

Stejskal B.

Infrastruktura i Ekologia Terenów Wiejskich

2012

nr 1/IV

The article mentions results from changes of physical properties of composted material during the composting process. Composting conditions in compost pile were simulated in five vessels with volume of 90 m3 under home conditions. Composted material was variously modified (mixing and turning, moistening, adding fresh material) during the composting process. Temperature and oxygen concentration inside vessels were measured, as well as reduction in volume of compost material during time, pH and electric conductivity of selected compost. It appeared that the temperature of the compost material in small volume in the compost pile was lower than the requirement for hygienization of the composted material. The temperature higher than 50°C was measured only sporadically and already during the first week of the experiment temperatures inside the vessels corresponded with outside temperatures. Oxygen concentration in all vessels was sufficient to ensure the aerobic process during the entire period of the experiment. The lowest measured oxygen concentration was higher than 10 %. These low values were measured only during the first week of the experiment, during the following weeks the oxygen concentrations exceeded 15% only with small exceptions. Reduction in volume of the composted material highly depended on whether the compost material was mixed and turned during the course of the composting process. Mixed and turned composted material was reducing its volume significantly, quicker than the composted material not being mixed and turned. The effect of moistening on the composted material was not proved. Measured pH values and electric conductivity (EC) values of the compost material from selected vessel K2 (composted material being mixed and turned, moistened, fresh compost material was not added) showed values fully corresponding with a quality well-matured compost. The average pH value was 7.76 with a standard deviation of 0.04 and the average EC value was 1.79 mS.cm-1 with a standard deviation of 0.27.

Ograniczanie wyników

2 Infrastruktura i Ekologia Terenów Wiejskich

2 Stejskal B.

1 2013

1 2012

Wyniki wyszukiwania

Determination of the composter volume required for garden grass treatment

Change of physical properties of biodegradable waste during decomposition