Biochemical Changes and Biological Origin of Key Odor Compound Generations in Pig Slurry during Indoor Storage Periods: A Pyrosequencing Approach

Table 3

Physiochemical analysis of pig slurry during different storage periods.

Parameters	1	2	3	4	5	6	7	8	9	10	11	13	14
BOD (mg/L)	37020	57060	56220	79740	86940	75780	73980	74340	99540	41460	29580	55260	33060
COD (mg/L)	13600	18400	21600	27200	31200	32000	22400	24000	32800	19200	10400	16000	12000
SS (mg/L)	13400	26500	22100	62700	76307.7	65301.2	29700	39500	64800	37200	7500	21600	8300
P2O5 (%)	0.145	0.260	0.235	0.330	0.440	0.400	0.280	0.215	0.325	0.135	0.100	0.235	0.135
TKN (%)	0.3	0.5	0.5	0.7	0.8	0.7	0.6	0.6	0.7	0.4	0.3	0.5	0.3
NH 4 -N(%)	0.1231	0.2348	0.2159	0.3293	0.3428	0.3371	0.2979	0.2414	0.3126	0.1420	0.1563	0.2371	0.1536
NO 3 -N(%)	0.00215	0.00210	0.00246	0.00187	0.00187	0.00186	0.00196	0.00215	0.00211	0.00208	0.00256	0.00212	0.00205
pH	5.8	5.9	5.8	6.0	5.9	6.0	6.0	6.0	6.0	6.0	6.3	6.0	6.0
Moisture (%)	95.90	94.42	94.59	91.35	88.31	89.36	93.57	93.60	89.27	94.57	97.47	92.73	97.30
OM (%)	2.733	3.983	3.930	6.499	9.557	8.785	4.627	4.764	8.815	3.998	1.401	5.653	1.545

BOD: biological oxygen demand; COD: biological chemical demand; SS: solid suspension; P₂O₅: phosphorus pentoxide; TKN: total Kjeldahl nitrogen; NH ₄ –N: total ammonium; NO ₃ –N: total nitrate, OM: organic matter.