【摘要】：采用化學(xué)沉淀-分散劑法制備改性硅酸鈣(modified calcium silicate,MCS),以進(jìn)一步提高養(yǎng)殖廢水厭氧處理過程中同步脫碳除磷能力。首先,本研究采用沉淀溶解理論解析MCS磷吸附特性機(jī)理,再將MCS投加到厭氧反應(yīng)裝置中,并通過測定污泥的顆粒粒徑、表面EPS和Zeta電位變化,以深入探討MCS對厭氧污泥特性的影響。結(jié)果表明:MCS與磷酸鈣的沉淀轉(zhuǎn)化能力最強(qiáng),平衡常數(shù)K值高達(dá)7.8×105,而且發(fā)生的吸附沉淀反應(yīng)不受其他離子的干擾;MCS投加到反應(yīng)裝置中,污泥顆粒平均粒徑和D80累計(jì)粒徑增幅分別達(dá)到72.46%和72.97%、EPS量增加了約11%、Zeta電位值由-19.8 m V降到了-3.6 m V,因此MCS投加到反應(yīng)器中不僅增大了污泥的顆粒粒徑,還可縮短了污泥顆粒化的時(shí)間并增強(qiáng)污泥的活性。
[Abstract]:Modified calcium silicate (modified calcium silicate,MCS) was prepared by chemical precipitation-dispersant method in order to further improve the ability of simultaneous decarbonization and phosphorus removal in anaerobic treatment of aquaculture wastewater. Firstly, the mechanism of phosphorus adsorption of MCS was analyzed by precipitation dissolution theory, and then MCS was added to the anaerobic reactor. The particle size of sludge, the change of surface EPS and Zeta potential were measured. The effect of MCS on anaerobic sludge was studied. The results show that the precipitation and transformation ability of MCS and calcium phosphate is the strongest, the equilibrium constant K is up to 7.8 脳 10 ~ 5, and the adsorption precipitation reaction is not interfered by other ions. When MCS was added to the reactor, the average particle size of sludge and the cumulative diameter of D80 increased by 72.46% and 72.97%, respectively, and the Zeta potential decreased from -19.8 MV to -3.6 MV, respectively. Therefore, the addition of MCS to the reactor not only increased the particle size of sludge, but also shortened the time of sludge granulation and enhanced the activity of sludge.
【作者單位】： 江南大學(xué)環(huán)境與土木工程學(xué)院;無錫市錫山區(qū)環(huán)境保護(hù)局;江蘇省水處理技術(shù)與材料協(xié)同創(chuàng)新中心;
【基金】：江蘇省自然科學(xué)基金資助項(xiàng)目(BK2012558) 江蘇省高�？蒲谐晒a(chǎn)業(yè)化項(xiàng)目(JHB2011-29) 科技部水體污染控制與治理科技重大項(xiàng)目(2011ZX07301-002)
【分類號(hào)】：X713

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