以生物濾床去除堆肥場臭味之研究

本研究藉由濾床模型與實場生物濾床，探討提升堆肥場脫臭效率之方法。濾床模型試驗分四組，分別為調濕木屑濾床（SW）、調濕生物濾床（BW）、木屑濾床（SD）、生物濾床（BD）等，其平均氨氣去除率為92%、98%、76%、89%，以調濕生物濾床（BW）顯著較佳（P＜0.05），其濾料pH值保持在7.5以下，水分在35%以上，銨氧化菌亦能增殖。實場採用具調濕塔之生物濾床，進氣中氨氣含量濃度為30-1300μ1/L，平均濃度為260μ1/L，氨氣總去除率為99.9%，臭味之去除率為96%。以濾料3300公斤之脫臭槽比較，木屑與生物濾床操作成本分別為99與30元／天，使用生物濾床較木屑脫臭槽具有較高經濟效益。

關鍵字

生物濾床；脫臭；堆肥

並列摘要

The odourous gas emitted from composting plant was used to study the deodor efficiency by four pilotscale and a full-scale biofilters. The four treatments of pilot-scale biofiltration were sawdust filter with a humidifier (SW), biofilter with a humidifier (BW), sawdust filter without a humidifier (SD) and biofilter without a humidifier (BD). The ammonia removal rates by these treatments were 92%, 98%, 76%, and 89%, respectively. The biofilter with humidifier had highest efficiency in keeping the pH under 7.5, moisture content over 35%, and allowing ammonia oxidizing bacteria (AOB) to continue to grow. Therefore, the biofilter with humidifier was set up in full-scale composting plant. The results showed the average ammonia concentrations of the inlet gas were 260 μL/L ( 30-1300 μL/L) and the ammonia and odour removal rates were 99.9 % and 96 %. Evaluation on the biofiltration systems with 3,300 kg of packing materials showed the operation cost of the sawdust filter without humidification and the biofilter with humidification were 99 and 30 NT dollars/day, and the latter was more economical and efficient.

並列關鍵字

Biofilter ； Deodour ； Compost

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