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2021-07-20
影响生物除臭的因素有哪些?
生物除臭工艺所采用的各种微生物都有其最大生化处理量,对同一生化处理塔而言,进气的臭气浓度在一定范围内,生物膜上的微生物能有效地降解臭气物质。适当提高进气流量可以增加臭气物质在生物塔内填料间复杂的空隙中发生湍流,从而增大了气体的混合强度,即随着进气臭气浓度的增高,填料的体积负荷也增大,臭气去除率几乎不受影响。
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影响生物除臭的因素有哪些?
Date﹕2021-07-20|Source:Eclear Environmental

生物除臭工艺所采用的各种微生物都有其生化处理量,对同一生化处理塔而言,进气的臭气浓度在一定范围内,生物膜上的微生物能有效地降解臭气物质。适当提高进气流量可以增加臭气物质在生物塔内填料间复杂的空隙中发生湍流,从而增大了气体的混合强度,即随着进气臭气浓度的增高,填料的体积负荷也增大,臭气去除率几乎不受影响。

但当进气流量超过一个临界值时,由于臭气物质与生物膜接触时间缩短,生物膜无法充分吸附和降解臭气物质,即处理量超过了微生物的代谢极限值,此时净化率反而降低。而且由于有些臭气物质还是微生物生理代谢的抑制物,臭气浓度过高可能还会抑制微生物的生长。因此在处理恶臭气体时,应根据具体情况,调整进气流量,实现气体充分混合和完全吸附的平衡。

生物除臭

为了保证生化处理塔中生物滤床的长期运行,必须定期向其添加营养物。在生物滤池的启动和稳定运行阶段,营养物质的供应对其生物活性有很大的影响,丰富的营养可以让微生物大量繁殖,提高净化率。但生物滤床表面的微生物密度过高,过多细胞分泌物覆盖在生物膜表面时,净化率反而会受到影响。具体的添加量与添加频率可参考恶臭气体中的碳质量分数并结合实际运行情况来确定。一般情况下营养液(主要养分为氮、磷)根据所需去除总烃的量,按总烃:氮:磷 = 100:5:1的比例进行配置。

一级生物污水池加盖除臭滤床采用氮磷营养液进行洗涤,营养液的循环量按5mh进行,并定期更换新鲜营养液。同时,需要定期检查喷嘴是否正常喷水,如有堵塞需及时清除杂物。而二级生物除臭系统采用上海羿清环保联合大学实验室联合开发的生物菌种和填料,系统不设循环洗涤系统,只需根据填料的干湿情况,人工定期喷淋,生物填料的更换周期为35a

上海羿清环保生产的生物除臭设备能够有效处理恶臭气体,而且不会产生二次污染,受到业内人士的一致好评。

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