滴濾設施去除堆肥舍之氨氣及異味

本試驗利用添加銨氧化菌組（滴濾A組）與調控pH組（滴濾B組）之滴濾設施，在11、15及23秒氣體接觸時間（gas contact time, GCT）條件下，處理白肉雞墊料堆肥化過程產生之氨氣及異味。結果顯示堆肥溫度上升達65℃以上且可以維持3天，且產生高氨氣與異味濃度，氨氣與異味濃度在翻堆後隨堆積天數呈現下降趨勢。滴濾A組在GCT 15、23秒操作條件下獲得較高之氨氣去除效率，分別為94.8%、93.6%；異味去除效率為50.6%－75.6%，不同GCT條件下並無顯著差異。滴濾B組之氨氣去除效率在GCT11、15、23秒條件下無顯著差異；而控制pH為6時，氨氣去除效率95.5%，顯著較pH為7（84.9%）及8（74.6%）為佳；異味去除效率為50.4%－77.0%，在不同GCT及pH控制之操作條件皆無顯著差異。根據以上結果，對於雞糞墊料堆肥化散逸之氨氣與異味去除，建議以添加銨氧化菌之滴濾設施控制GCT在15秒以上或調控pH之滴濾設施控制pH為6。

關鍵字

白肉雞墊料；堆肥化；氨氣；異味

並列摘要

There were two trickling filters used in this study. Filter A was inoculated with ammonia-oxidizing bacteria. Filter B was pH controlled. The exhausted gases of broiler litter composting process were conducted to these two bio-trickling filters to reduce the NH3 and odor emission. The gas contact times (GCT) were set at 11, 15 and 23 seconds for both filters. The temperatures rose to more than 65℃ and was maintained for over 3 days during the composting process. A peak of the NH3 and odor emissions was observed with the thermophilic stage. The odor and ammonia concentrations of the exhausted gas significantly decreased when the piling days of compost increased. The ammonia removal efficiencies of filter A were 94.8% and 93.6% when the GCT was 15 and 23 seconds, respectively. The odor removal efficiencies were between 50.6% and 75.6%, and there was no significant difference among different GCTs. There was no difference on ammonia removal efficiencies among different GCTs for filter B. The ammonia removal efficiency was 95.5% when the pH was controlled at 6, that was significantly higher than those at pH 7 (84.9%) and pH 8(74.6%) . The odor removal rates ranged at 47.2% to 77.0%, and there was no difference among different GCTs and pH values. According to these results, a bio-trickling filter with GCT 15 seconds and a trickling filter with controlled pH at 6 were suggested to be utilized on the removal of ammonia and odor produced during the composting process of broiler litter.

並列關鍵字

Broiler litter ； Composting process ； Ammonia ； Odor

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