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首页> 外文会议>International Seminar on Fundamental and Application of Chemical Engineering >Anaerobic Digestion of Palm Oil Mill Effluent with Lampung Natural Zeolite as Microbe Immobilization Medium and Digested Cow Manure as Starter
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Anaerobic Digestion of Palm Oil Mill Effluent with Lampung Natural Zeolite as Microbe Immobilization Medium and Digested Cow Manure as Starter

机译：棕榈油磨削棕榈油厂的厌氧消化用灯天然沸石作为微生物固定化培养基和消化牛粪作为起动器

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摘要

Indonesia is well-known as the world's biggest palm oil producer with 32.5 million tons of annual production. Palm oil processing contributes to 60% wastewater, leading to environmental problem caused by excessive production of wastewater. This wastewater, i.e. Palm Oil Mill Effluent (POME), has high organic content (40,000-60,000 mg COD/L) which is potential for biogas production. However, its low pH value and long chain fatty acid content likely inhibit the anaerobic digestion. Porous media might reduce the inhibitory effect during POME digestion since the media act as both immobilization media for bacteria and as inhibitor adsorbent. Excessive amount of porous media might interfere with the nutrient consumption by microbes. There will be an optimum amount of porous media added, which depends on the wastewater characteristics. This research studied Lampung natural zeolite as immobilization media in digesting POME. The batch experiment was conducted for 40 days with different amount of natural zeolite, i.e. 0; 45; 100; and 200 g/g COD. Digested cow manure was used as the starter inoculum, considering the abundance of anaerobic bacteria therein. Zeolite addition was proven to accelerate COD reduction and stabilized the volatile fatty acid as the intermediate product of anaerobic digestion. The addition of natural zeolite up to 45 g/g COD is considered enough to increase the COD removal (85.695 %), maintain the methane content up to 50%, and enhance the bacteria activity. However, larger amount of natural zeolite lowered the methane production and COD reduction, which indicated nutrient adsorption on to the media and hence caused decreasing nutrient access by the microbes.
机译：印度尼西亚是世界上最大的棕榈油生产商，年产3250万吨。棕榈油加工有助于60％的废水，导致由过量生产废水引起的环境问题。该废水，即棕榈油磨流出物（Pome），具有高有机含量（40,000-60,000mg Cod / L），这是沼气生产的潜力。然而，其低pH值和长链脂肪酸含量可能抑制厌氧消化。由于介质作为细菌的固定介质和抑制剂吸附剂，因此多孔介质可能降低沼泽消化期间的抑制作用。过量的多孔介质可能会干扰微生物的营养消耗。将有最佳的多孔介质添加量，这取决于废水特性。本研究研究了灯天然沸石作为消化泥色的固定介质。分批实验以不同量的天然沸石进行40天，即0; 45; 100;和200克/克鳕鱼。消化的牛粪被用作起始的接种物，考虑到其中的厌氧细菌的丰富。被证明的沸石添加以加速COD COD和稳定挥发性脂肪酸作为厌氧消化的中间产物。添加天然沸石高达45克/克COD的鳕鱼被认为足以增加COD去除（85.695％），将甲烷含量保持高达50％，增强细菌活性。然而，大量的天然沸石降低了甲烷的产生和COD减少，这表明对介质的营养吸附，因此引起了微生物的营养物进入。

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