2. MATERIALS AND METHODS
2.1. Raw Material and Preparation of Slurry
The TLW as the biogas substrate was obtained from
four home industries on the center of tofu industry on
Indihiang. As much as 100 L of waste was taken,
homogenized, mixed and stirred. The paddy straw and
bamboo leaves were obtained from various locations on
the subdistrict of Tawang. The cabbage waste was
collected from Cilembang Market Center in
Tasikmalaya. The organic material (2.5 kg) was cut into
the size of 1cm2 before being mixed with 50 L of TLW.
2.2. Experimental Setup
The study was conducted to examine the treatments
of: (A) TLW as the control; (B) TLW+sheep dung; (C)
TLW+rice straw; (D) TLW+bamboo leave waste; (E)
TLW+cabbage waste. The treatments were arranged in
randomized experimental designs. The data were
analyzed by using analysis of variance (Anova) and
continued with the Duncan’s multiple different test
(Gomez and Gomez, 1984).