Table 1.

Polyhydroxybutyrate (PHB) producing abilities of mixed cultures of Bacillus spp. on GM2 medium^a

Bacillus co-culture (BC)b	Incubation period (h)
	24			48				72
	DCMc (mg/l)	PHB		DCM (mg/l)	PHB		DCM (mg/l)		PHB
		mg/l	% DCM		mg/l	% DCM			mg/l	% DCM
6BC1	265	40	15.1	315	150	47.6	320		140	43.8
5BC1	300	100	33.3	430	230	53.5	485		225	46.4
5BC2	410	105	25.6	685	230	33.6	710		235	33.1
4BC1	385	110	28.6	530	250	47.2	560		240	42.9
4BC2	250	95	38.0	410	205	50.0	435		195	44.8
4BC3	220	75	34.1	445	190	42.7	475		200	42.1
3BC1	235	90	38.3	430	185	43.0	490		190	38.8
2BC1	210	120	57.1	380	230	60.5	430		235	54.7
2BC2	265	105	39.6	445	220	49.4	485		210	43.3

Values are based on three sets of experiments. The standard deviation was less than 5 %

^aTotal volume of feed: 200 ml of GM2 media supplemented with 1 % (w/v) glucose

^b Bacillus co-culture for PHA production (See Table S1 for details)

^cDry cell mass