A FIELD-SCALE SURFACE AERATION SYSTEM TO REDUCE ODOR GENERATION

作者：Dong C^*; Zhu J; Miller C F

来源：Transactions of the ASABE, 2009, 52(2): 615-620.

• BOD reduction
• Field-scale
• Odor control
• Surface aeration
• Swine manure
• VFAs

A field-scale surface aeration system was tested from mid-June to mid-October in this study. About 0.14 ha (1/3 acre) of the liquid manure storage was surface-aerated continuously for four months, with the unaerated portion as the control. The aeration system consisted of a venturi air injector module, a 1.1 kW centrifugal pump, and a distribution frame made of PVC pipes. The results indicated that the solids removal efficiencies were 39.64% for TVS and 16.55% for TS after four months of aeration, while the ratio of TVS to TS decreased from about 49% to 31%. In the first seven weeks, the BOD removal efficiency was lower than 20% (9% on average) but increased linearly from 21.5% to 86.5% during the rest operating time. The VFA removal efficiency increased from 5% at the beginning to 85% at the end of the experiment, with the VFA level in the aerated liquid manure was reduced to below 230 mg/L. The linear coeffcient between BOD and VFAs was 0.87. The results show that a DO level lower than 0.5 mg/L can still be effective in controlling odor The electricity cost for running the surface aeration system was estimated at $0.21 per pig finished.

• 出版日期2009-4