本文選題：脫水污泥　切入點(diǎn)：沙化土　出處：《水土保持學(xué)報(bào)》2017年01期 　論文類型：期刊論文

【摘要】：為探究城市生活污水處理廠脫水污泥作為土地改良劑對(duì)沙漠化土壤的改良效果,確定合適的污泥摻混量,試驗(yàn)以離心脫水污泥與沙漠表層土壤按污泥摻混量為5%,10%,15%,20%,25%,30%,35%充分摻混,以土壤物理指標(biāo)、營養(yǎng)指標(biāo)為考察指標(biāo),研究不同污泥摻混量對(duì)沙土的改良效果,并與3種適于耕作土壤平行對(duì)比。試驗(yàn)表明沙土經(jīng)污泥摻混后,隨著污泥摻混量的增大,其土粒密度、土壤容重降低;污泥摻混量與土粒密度和土壤容重呈負(fù)相關(guān),相關(guān)系數(shù)可達(dá)-0.99,-0.89,而土壤孔隙度增加,呈正相關(guān)(r=0.79),當(dāng)污泥摻混量大于10%后,污泥摻混量對(duì)土壤容重、孔隙度的改良效果減緩;改良沙土中有機(jī)物含量、含水率隨污泥摻混量增加呈線性增加(r0.99),持水能力與污泥摻混量呈顯著正相關(guān)(r=0.99)。改良沙土較對(duì)比土壤有更強(qiáng)的保水能力;氮、磷元素含量和污泥投加量呈顯著正相關(guān)(r0.95),污泥摻混量為15%~25%時(shí),改良沙土氮磷含量均接近對(duì)比土壤含量,污泥摻混對(duì)土壤全鉀含量改善不大,但能有效提高土壤有效鉀含量。污泥摻混量為10%~25%時(shí),改良沙漠化土壤的理化性質(zhì)接近對(duì)比適宜耕作土壤。
[Abstract]:In order to investigate the improvement effect of dewatered sludge from municipal sewage treatment plant on desertification soil as a land improvement agent and determine the appropriate amount of sludge mixing, the experiment used centrifugal dewatered sludge and desert surface soil to mix the sludge with the surface soil of the desert. Taking soil physical index and nutrition index as the investigation index, the improvement effect of different sludge mixing amount on sandy soil was studied, and it was compared with three kinds of suitable tillage soil. The experiment showed that the sand soil was mixed with sludge, with the increase of sludge mixing amount. The soil particle density and bulk density of soil decreased, the sludge mixing amount was negatively correlated with soil particle density and soil bulk density, and the correlation coefficient could reach -0.99- 0.89, while the soil porosity increased, which was positively correlated with soil bulk density. When the sludge mixing amount was more than 10%, the sludge mixing amount had a positive correlation with soil bulk density. The content of organic matter and moisture content in improved sandy soil increased linearly with the increase of sludge content, and the water holding capacity was significantly positively correlated with sludge content. The improved sandy soil had stronger water retention capacity than that of the control soil, and nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, nitrogen, There was a significant positive correlation between phosphorus content and sludge dosage. When the amount of sludge was 15 ~ 25, the content of nitrogen and phosphorus in improved sandy soil was close to the contrast soil content, but sludge mixing had little effect on soil total potassium content. But it can effectively increase the available potassium content in the soil. When the sludge mixing amount is 10 ~ 25, the physical and chemical properties of the improved desertification soil are close to that of the suitable tillage soil.
【作者單位】： 沈陽建筑大學(xué)遼河流域水污染防治研究院市政與環(huán)境工程學(xué)院;
【基金】：沈陽建筑大學(xué)學(xué)科涵育項(xiàng)目(XKHY2-116);沈陽建筑大學(xué)青年基金項(xiàng)目(2015010);沈陽建筑大學(xué)博士后基金(SJZUBSH201625) 國家水體污染控制與治理科技重大專項(xiàng)(2014ZX07202-011) 遼寧省教育廳科學(xué)研究項(xiàng)目(LJZ2016028)
【分類號(hào)】：S156;S141.6

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 王磊;香寶;蘇本營;方廣玲;胡鈺;潘麗波;王s，

本文編號(hào)：1588400