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首页> 外文期刊>Transactions of The Institution of Chemical Engineers. Process Safety and Environmental Protection, Part B >On-farm trials of practical options for hydrogen sulphide removal from piggery biogas
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On-farm trials of practical options for hydrogen sulphide removal from piggery biogas

机译：猪硫化物沼液中硫化氢去除的实际选择的农场试验

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摘要

Manure-derived biogas is increasingly used at Australian piggeries to produce heat and generate electricity. However, high concentrations of hydrogen sulphide (H2S) in piggery biogas is discouraging further use, because of a lack of practical, cost-effective H2S removal options. To address this issue, on-farm trials were conducted at two piggeries. One trial tested H2S oxidation; adding small amounts of air to biogas, upstream of a low-cost enhanced surface treatment vessel which was fabricated on-farm with intrinsic safety measures. Covered anaerobic pond (CAP) effluent provided a convenient, low-cost nutrient source for the biofilm of naturally-occurring microorganisms in the packed column. This treatment was effective, removing over 90% of the H2S in a single pass and reducing H2S concentrations from 4000ppm to <400ppm. Another trial tested chemisorption performance of natural, iron-rich red soil, mixed with a ground sugar cane mulch bulking agent, in comparison with cg5 commercial media (iron-oxide pellets). The red soil removed H2S, but had a substantially lower capacity (?2gS/kg red soil) than the cg5 (?200gS/kg media). Accordingly, red soil is unlikely to be feasible as a primary treatment medium, but may be useful for final polishing after an oxidation step has removed most of the H2S.
机译：植物源性沼气越来越多地用于澳大利亚猪猪以产生热量并发电。然而，由于缺乏实用，成本效率的H2S去除选项，猪猪沼气中的高浓度硫化氢（H2S）是令人沮丧的。为了解决这个问题，在两只猪肉中进行了农作物。一项试验测试H2S氧化;在低成本增强表面处理容器的上游增加了较少的空气，以固有的安全措施制造的低成本增强的表面处理容器。覆盖的厌氧池塘（帽）流出物为填充柱中天然存在的微生物的生物膜提供了方便的低成本营养源。该处理是有效的，在单次通过中除去超过90％的H 2 S，并将H 2 S浓度从400ppm降低至<400ppm。与CG5商业介质（铁氧化铁颗粒）相比，另一种试验性，富含铁富红色土壤的化学吸附性能，与煤甘蔗覆盖物混合。除去H2S的红壤，但比CG5（α2Gs/ kg培养基）具有基本上更低的容量（α/ kg红壤）。因此，红色土壤不太可能作为初级治疗介质可行，但在氧化步骤除去大部分H 2 S之后，可能可用于最终抛光。

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