【摘要】：污泥是污水處理過(guò)程中產(chǎn)生的固體廢物,污泥調(diào)質(zhì)是改善污泥脫水性能,降低污泥水分的重要方法,對(duì)實(shí)現(xiàn)污泥的減量化、資源化有重要意義。本論文探討了污泥調(diào)質(zhì)與機(jī)械脫水的主要影響因素,結(jié)論如下:采用真空抽濾實(shí)驗(yàn)探討了基于半焦的污泥調(diào)質(zhì)與機(jī)械脫水的影響因素,通過(guò)污泥比阻測(cè)試、掃描電子顯微鏡(SEM)分析、紅外光譜分析(FT-IR)和ζ電位測(cè)試分析揭示了基于半焦的污泥調(diào)質(zhì)與機(jī)械脫水的機(jī)理。實(shí)驗(yàn)結(jié)果表明:當(dāng)半焦粒徑為75-200μm,添加量為1.5 g半焦·(100 mL)-1污泥(含水率98.49%)時(shí),云南褐煤在500℃下熱解的半焦對(duì)污泥調(diào)質(zhì)與機(jī)械脫水效果較好;經(jīng)半焦調(diào)質(zhì)污泥的機(jī)械脫水泥餅含水率、脫水時(shí)間分別由原污泥的76.02%、124 s降低至61.14%、75 s,半焦對(duì)污泥調(diào)質(zhì)與機(jī)械脫水有顯著效果;污泥機(jī)械脫水泥餅含水率與半焦質(zhì)量參數(shù)(O/C、H/C、BET比表面積、孔容)呈現(xiàn)良好的相關(guān)關(guān)系。半焦對(duì)污泥調(diào)質(zhì)與機(jī)械脫水的機(jī)理主要表現(xiàn)在半焦能作為骨架結(jié)構(gòu)顯著改善污泥的脫水性能,降低ζ電位的絕對(duì)值,消弱污泥的親水性能以及對(duì)污泥的吸附作用。通過(guò)真空抽濾實(shí)驗(yàn)研究了化學(xué)調(diào)理劑種類、添加量及化學(xué)調(diào)理劑混配比對(duì)污泥調(diào)質(zhì)與機(jī)械脫水效果的影響。對(duì)活性污泥,單一絮凝劑PAFC和PAC對(duì)污泥調(diào)質(zhì)與機(jī)械脫水的效果較好,混配時(shí),用0.03 gPAFC和1 mL CPAM對(duì)100 mL污泥(含水率97.08%)進(jìn)行調(diào)質(zhì),真空抽濾后污泥的含水率最低,用0.06 gPAC和3 mL CPAM對(duì)100 m L污泥(含水率97.08%)進(jìn)行調(diào)質(zhì),污泥比阻和抽濾時(shí)間最小;對(duì)消化污泥,FeCl3對(duì)污泥調(diào)質(zhì)與機(jī)械脫水的效果最好,用1.2 gFeCl3和5 mLCPAM對(duì)100 mL污泥(含水率90.5%)進(jìn)行調(diào)質(zhì),真空抽濾污泥的含水率最低,用1.5 gFeCl3和15 mLCPAM對(duì)100 mL污泥(含水率90.5%)進(jìn)行調(diào)質(zhì),污泥比阻和抽濾時(shí)間最小。通過(guò)熱解和真空抽濾實(shí)驗(yàn),研究了污泥熱解產(chǎn)物——污泥活性炭(SSBC)對(duì)污泥調(diào)質(zhì)與機(jī)械脫水效果的影響,結(jié)果表明,污泥活性炭對(duì)污泥進(jìn)行調(diào)質(zhì)不僅能改善污泥機(jī)械脫水效果,還能提高污泥熱值;對(duì)污泥進(jìn)行調(diào)質(zhì)時(shí),其粒徑為75μm以下、添加量為2.0 g·(100 m L)-1污泥時(shí),污泥脫水效果較好;污泥調(diào)質(zhì)與機(jī)械脫水對(duì)比試驗(yàn)表明,污泥活性炭是一種良好的污泥脫水調(diào)理劑。通過(guò)對(duì)污泥酸堿度、溫度的調(diào)控,探究了pH、溫度對(duì)污泥調(diào)質(zhì)與機(jī)械脫水效果的影響。結(jié)果表明,污泥偏弱酸性時(shí),污泥調(diào)質(zhì)與機(jī)械脫水效果更好,隨著堿度增大,污泥脫水性能變差,其中,FeCl3對(duì)污泥調(diào)質(zhì)與機(jī)械脫水效果受pH(pH=6.5~8.5)變化的影響較小;對(duì)于半焦和FeCl3,污泥溫度越高,污泥調(diào)質(zhì)與機(jī)械脫水效果越好,對(duì)于PFS,污泥溫度為40℃時(shí),其對(duì)污泥調(diào)質(zhì)與機(jī)械脫水效果相對(duì)較好。
[Abstract]:Sludge is a solid waste produced in the process of sewage treatment. Sludge conditioning is an important method to improve sludge dewatering performance and reduce sludge moisture. It is of great significance to realize sludge reduction and reuse. The main influencing factors of sludge conditioning and mechanical dewatering are discussed in this paper. The conclusions are as follows: the influence factors of sludge conditioning and mechanical dewatering based on semi-coke are discussed by vacuum filtration experiment, and the specific resistance of sludge is measured. Scanning electron microscope (SEM) (SEM), infrared spectroscopy (FT-IR) and 味 potential analysis revealed the mechanism of sludge conditioning and mechanical dewatering based on semi-coke. The results showed that when the diameter of char was 75-200 渭 m and the amount of sludge was 1.5g (100 mL) -1 sludge (water content 98.49%), the pyrolysis of Yunnan lignite at 500 鈩，

本文編號(hào)：2218044