Evaluation of Biodegradable Trash Bags in Household Waste Composting¹

Yang, S.R., J.C.Huang¹and S.N. Huang²

1、  Horticulturist and assistant, respectively, Tainan District Agricultural Improvement Station,COA.350,Setion 1,Linshen Road,Tainan,70125.Taiwan,Republic of China

2、  Director, Food and Agriculture Department, Council of Agriculture, Executive Yun. 37 Nan-hi Road, Taipei, 100 Taiwan, R.O.C

3、  E-mail：sryang@mail.tndais.gov.tw.；jchuang@mail.tndais.gov.tw.

Summary

In Taiwan , municipal solid waste is composted of 17.9-25.7﹪of organic household wastes and 17.8-20﹪ of used plastics. In order to decrease the amount of regular plastics, the household wastes were collected and biodegradable trash bags were used in composting for recycling of organic materials. This process can reduce environmental pollution, and improve physical and chemical properties of soil.

The Mater-Bi biodegradable films（NF01U，50﹪ starch and 50﹪ PCL）, a product of Novamont , Italy, was used in the composting experiment at Tainan DAIS in 2000. Biodegradable trash bags were incorporated with household wastes and then, fermented at a wastage composting site of organic farm for 3 months. All of the biodegradable trash bags degradade completely 44 days after composting. Organic compost obtained from the fermented tank incorporated with household and biodegradable trash bags was good in quality (except a little more in moisture) compared to controls treatment. Organic compost also was good in growth for leafy vegetables.

Key words：Biodegradable trash bags, Household, Composting

Fig 1. Temperature of fermented tank incorporated with biodegradable trash bags & household during composting period

Fig 2. Moisture of fermented tank incorporated with biodegradable trash bags & household during composting period

Table 1. Analysis of organic matters incorporated with household ＆ biogegradable trash bags

*： Mater-Bi biodegradable trash bag ( 0.03mm in thickness ,white in colour )

   Period:21/9/2000-27/12/2000

Table 2. Macro-elements content of organic matters incorporated with household ＆ biodegradable trash bags

Table 3. Micro-elements content of organic matters incorporated with household ＆ biodegradable trash bags

Table 4. Growth of Pai-tsai grown in orgranic matters incorporated with household ＆ biodegradable trash bags

*：Means within each column followed by the same letter are not significantly different at 5﹪level

**：Mater-Bi biodegradable trash bag ( 0.03mm in thickness ,white in colour )

Planting-harvesting:22/2/2001-13/3/2001

Table 5. Macro-elements content of Pai-tsai grown in organic matters incorporated with household ＆ biodegradable trash bags

*&** See footnote of Table 4

Table 6. Micro-elements content of Pai-tsai grown in organic matters incorporated with household and biodegradable trash bags

*&** See footnote of Table 4

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