本文選題：污泥　切入點：培養(yǎng)床　出處：《西南科技大學》2015年碩士論文　論文類型：學位論文

【摘要】：隨著城鎮(zhèn)污水處理量日益增加,作為污水處理伴生產物的污泥量亦愈來愈大。已有研究表明,污泥不合理處理處置會對地表水、大氣、土壤等造成嚴重污染。近年來,大量研究人員致力于污水處理技術的研發(fā)。本研究利用蚯蚓具有食腐性的特征處理污泥,探究“蚯蚓培養(yǎng)床處理污泥+處理后產物農用”的污泥處理處置方式,旨在實現污泥的綠色資源化。論文取得的主要研究成果如下:為了獲得較高的蚯蚓增殖量和較好的含污泥基質處理速率,優(yōu)化蚯蚓培養(yǎng)床條件參數如下:污泥中添加秸稈(混合質量比9:1);單次含污泥基質添加量為400g,每12天添加一次;培養(yǎng)床基質構成為1 0 c m底層土壤+5 c m緩沖基質+含污泥基質;以灰色土壤作底層土壤。通過觀察發(fā)現,蚯蚓活動能明顯改變含污泥基質外觀,將大塊的污泥分解成為以蚯蚓糞為主的細碎狀物質。且研究顯示,在培養(yǎng)床中接種蚯蚓能明顯提高培養(yǎng)床對含污泥基質中TN、TP、OM的去除率和對含污泥基質中細菌的滅活率。蚯蚓活動可改變培養(yǎng)床各層基質TN、TP的分布狀況。培養(yǎng)起始時,培養(yǎng)床各層基質中TN、TP分布相對均勻,至培養(yǎng)結束時,接種蚯蚓的培養(yǎng)床含污泥基質層和緩沖基質層中的TN、TP值較初始值降低,而底層土壤層的TN、TP值較初始值增加。使用添加蚯蚓糞的土壤作為種植基質,可促進青椒幼苗和鳳仙花幼苗的生長,且土壤中混合蚯蚓糞的比例越高幼苗生長狀況越好。較種植到一般土壤中的青菜種子,使用添加新鮮脫水污泥的土壤作為種植基質,會使青菜種子最終發(fā)芽率降低32.5%;使用添加蚯蚓糞的土壤作為種植基質,在研究進行的各個時間段內均能促進青菜種子的發(fā)芽,使其最終發(fā)芽率提高10.9%。
[Abstract]:With the increasing amount of sewage treatment in cities and towns, the amount of sludge which is associated with sewage treatment is becoming larger and larger. Some studies have shown that the unreasonable treatment of sludge will cause serious pollution to surface water, atmosphere, soil, etc. In recent years, A large number of researchers have devoted themselves to the research and development of sewage treatment technology. In this study, the characteristics of earthworms with scavenging property were used to treat sludge, and to explore the sludge treatment and disposal mode of "earthworm culture bed after sludge treatment after sludge treatment for agriculture". The main results of this paper are as follows: in order to obtain higher earthworm proliferation and better sludge substrate treatment rate, The optimized conditions of earthworm culture bed are as follows: adding straw (mixed mass ratio 9: 1), adding 400 g of sludge substrate once every 12 days; The substrate composition of culture bed was 10 cm bottom soil, 5 cm buffer substrate containing sludge, and gray soil as bottom soil. It was found that earthworm activity could obviously change the appearance of sludge containing substrate. Decompose a large chunk of sludge into a fine fragment of material dominated by earthworm dung. And studies have shown that, Inoculation of earthworms in the culture bed could obviously increase the removal rate of TNTTPOM and the inactivation rate of bacteria in the sludge containing substrate. Earthworm activity could change the distribution of TNTTP in each layer of the culture bed, and at the beginning of culture, the activity of earthworm could change the distribution of TNTTP in each layer of culture bed. The distribution of TNTP in each layer of the culture bed was relatively uniform. At the end of culture, the TNTP values in the substrates containing sludge and in the buffer substrates of earthworm inoculated in the culture bed were lower than the initial values. However, the TNN TP value of the bottom soil layer was higher than the initial value. Using the soil supplemented with earthworm dung as the planting substrate could promote the growth of green pepper seedlings and Impatiens chinensis seedlings. The higher the proportion of earthworm dung in the soil, the better the seedling growth condition. Compared with the vegetable seeds planted in the general soil, the soil supplemented with fresh dewatered sludge was used as the planting substrate. The soil supplemented with earthworm dung could promote the germination of green vegetable seeds and increase the final germination rate by 10.9%.
【學位授予單位】：西南科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X703;X174

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本文編號：1613848