濃稀分流對(duì)豬場(chǎng)糞污厭氧—好氧處理系統(tǒng)的影響
發(fā)布時(shí)間：2018-12-15 20:56
【摘要】：畜禽養(yǎng)殖糞污已經(jīng)成為環(huán)境污染的重要來(lái)源,其中又以豬場(chǎng)糞污所占比重最大,迫切需要經(jīng)濟(jì)、高效、可靠的處理利用技術(shù)。目前,豬場(chǎng)糞污處理利用主要存在兩大問(wèn)題,一是污水量大,升溫困難,沼氣發(fā)酵產(chǎn)氣效率低。二是沼渣沼液難以完全利用,沼液好氧后處理效果差。針對(duì)上述問(wèn)題,本論文在課題組前期研究的基礎(chǔ)上,緊密?chē)@“濃稀分流對(duì)豬場(chǎng)糞污厭氧-好氧處理系統(tǒng)的影響”展開(kāi)研究,得出以下結(jié)果:(1)在豬場(chǎng)糞污處理工程現(xiàn)場(chǎng)進(jìn)行了固液分離生產(chǎn)性試驗(yàn)。數(shù)據(jù)測(cè)試分析表明,糞污經(jīng)過(guò)固液分離后,COD、BOD5、TS、SS、TKN、TP去除10.03%、19.23%、6.90%、10.08%、14.14%、14.42%,NH3-N幾乎沒(méi)有去除。固液分離對(duì)濃稀分流沒(méi)有明顯的影響,對(duì)固液分離后的豬場(chǎng)糞污(固液分離液)再進(jìn)行濃稀分流,仍然能取得較好的分離效果。(2)考察了濃稀分流比對(duì)濃稀分流效果的影響。結(jié)果表明,通過(guò)濃稀分流,可將豬場(chǎng)糞污體積與物質(zhì)非均衡分配,大部分污染物和植物營(yíng)養(yǎng)物分配到體積少的濃污水中,隨著濃污水所占的比例增加,污染物在濃污水中的比例增加,相應(yīng)在稀污水中的比例減少。盡管濃污水體積只占總體積的10~30%,甲烷產(chǎn)量卻占原水甲烷產(chǎn)量的63.38%~76.61%。(3)考察了濃稀分流比對(duì)好氧后處理單元的影響。結(jié)果顯示,濃稀比2:8體系的好氧處理效果最好,COD去除率85.4%,出水COD濃度為256 mg/L左右;氨氮去除99%以上,出水氨氮保持在5 mg/L以下;曝氣結(jié)束時(shí)混合液pH值在7.0以上,處理系統(tǒng)運(yùn)行穩(wěn)定。濃稀比1:9體系效果次之。3:7體系的效果最差,COD只去除了56.9%,出水COD濃度高于946mg/L;氨氮去除95.0%左右,出水在30 mg/L以上;曝氣結(jié)束時(shí)pH值在7.0以下,處理系統(tǒng)運(yùn)行不穩(wěn)定。綜合考慮沼氣發(fā)酵效率和好氧階段處理效果,2:8是最合適的濃稀分流比例。(4)進(jìn)一步對(duì)SBR出水進(jìn)行了深度處理試驗(yàn),發(fā)現(xiàn)絮凝處理優(yōu)于氧化處理。最適絮凝劑組合為生石灰+PAM,適宜終濃度分別為800 mg/L,2 mg/L,在此條件下,絮凝處理出水COD濃度能降到83 mg/L,氨氮7.36 mg/L,TP 0.3 mg/L,色度16倍,達(dá)到《污水綜合排放標(biāo)準(zhǔn)》一級(jí)標(biāo)準(zhǔn),藥劑費(fèi)用為0.475元/t污水。(5)技術(shù)經(jīng)濟(jì)分析表明,濃稀分流工藝與Anarwia工藝對(duì)豬場(chǎng)糞污處理效果不相上下并顯著優(yōu)于傳統(tǒng)厭氧-好氧組合工藝。同時(shí),濃稀分離工藝顯著提高了沼氣發(fā)酵效率,其容積產(chǎn)氣率比傳統(tǒng)厭氧-好氧組合工藝和Anarwia工藝提高282%。盡管濃稀分流與Anarwia工藝對(duì)豬場(chǎng)糞污的處理成本接近,但是,濃稀分流工藝沼氣發(fā)酵罐體積比Anarwia工藝減少72.36%,工程總投資費(fèi)用節(jié)約23.27%。綜上所述,基于濃稀分流的厭氧-好氧組合工藝,既能改善沼氣發(fā)酵效率,又解決了沼液好氧后處理效果差的問(wèn)題,相對(duì)傳統(tǒng)厭氧-好氧組合工藝和Anarwia工藝來(lái)說(shuō),是一種更經(jīng)濟(jì)、高效、可靠的工藝。
[Abstract]:Livestock and poultry manure pollution has become an important source of environmental pollution, among which pig manure occupies the largest proportion, and the urgent need for economic, efficient, reliable treatment and utilization technology. At present, there are two main problems in the treatment and utilization of pig manure, one is the large amount of sewage, the difficulty of heating up, and the low efficiency of biogas fermentation. Second, the biogas residue biogas liquid is difficult to be fully utilized, and the aerobic treatment effect is poor. In view of the above problems, this paper, on the basis of the previous research by the research group, focuses on the effect of concentrated and dilute distribution on the anaerobic and aerobic treatment system of pig manure. The results are as follows: (1) A productive experiment of solid-liquid separation was carried out in the field of pig manure treatment project. Data test and analysis showed that after solid and liquid separation, COD,BOD5,TS,SS,TKN,TP removal of 10.03 and 19.23 and 6.90 and 10.08 and 14.14 and 14.42 NH _ 3-N were hardly removed. Solid-liquid separation has no obvious effect on concentrated and dilute separation, and the pig manure (solid-liquid separation) after solid-liquid separation is separated by concentrated dilute separation. A good separation effect can still be obtained. (2) the effect of the ratio of concentrated and dilute distribution on the effect of concentrated and dilute separation was investigated. The results showed that the volume and substance of pig manure could be disequilibrium distributed by concentrated and dilute distribution, and most of the pollutants and plant nutrients were distributed to the concentrated sewage with small volume, and the proportion of the concentrated sewage increased with the increase of the proportion of the concentrated sewage. The proportion of pollutants in the concentrated sewage increased, and the proportion in the dilute sewage decreased accordingly. Although the volume of concentrated sewage is only 1030% of the total volume, methane production accounts for 63.38% of the total volume of methane in raw water. (3) the effect of concentration and dilute diffluence ratio on aerobic aftertreatment unit was investigated. The results showed that the aerobic treatment effect was the best at 2:8, the removal rate of COD was 85.45.45 mg/L, the concentration of COD in effluent was about 256 mg/L, the ammonia nitrogen removal was over 99%, and the ammonia nitrogen in effluent was below 5 mg/L. At the end of aeration, the pH value of the mixed solution is above 7.0, and the treatment system is stable. The effect of 3:7 system was the worst, COD was only 56.9%, the effluent COD concentration was higher than 946 mg / L, ammonia nitrogen removal was about 95.0%, effluent water was more than 30 mg/L. At the end of aeration, the pH value is below 7. 0, and the operation of the treatment system is unstable. Considering the biogas fermentation efficiency and aerobic stage treatment effect, 2:8 is the most suitable concentration and dilute distribution ratio. (4) further advanced treatment experiment of SBR effluent was carried out, it was found that flocculation treatment was better than oxidation treatment. The optimum flocculant combination is that the optimum final concentration of lime PAM, is 800 mg/L,2 mg/L, respectively. Under this condition, the effluent COD concentration of flocculation treatment can be reduced to 83 mg/L, ammonia nitrogen 7.36 mg/L,TP 0.3 mg/L, chroma 16 times. The cost of medicament is 0.475 yuan / t sewage. (5) Technical and economic analysis shows that, The treatment of pig manure by Anarwia process and concentrated dilute separation process was comparable and superior to the traditional anaerobic aerobic combination process. At the same time, the biogas fermentation efficiency was significantly improved by the concentrated and dilute separation process, and the volumetric gas production rate was increased by 282% compared with the traditional anaerobic aerobic combination process and Anarwia process. Although the cost of treatment of pig manure by Anarwia process is close to that of Anarwia process, the volume of biogas fermenter of concentrated and dilute separation process is 72.36 less than that of Anarwia process, and the total investment cost of the project is 23.27% less than that of Anarwia process. To sum up, the anaerobic aerobic combination process based on concentrated and dilute distribution can not only improve the efficiency of biogas fermentation, but also solve the problem of poor effect of aerobic treatment of biogas liquid. Compared with the traditional anaerobic and aerobic combination process and Anarwia process, It is a more economical, efficient and reliable process.
【學(xué)位授予單位】：中國(guó)農(nóng)業(yè)科學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X713
本文編號(hào)：2381277
[Abstract]:Livestock and poultry manure pollution has become an important source of environmental pollution, among which pig manure occupies the largest proportion, and the urgent need for economic, efficient, reliable treatment and utilization technology. At present, there are two main problems in the treatment and utilization of pig manure, one is the large amount of sewage, the difficulty of heating up, and the low efficiency of biogas fermentation. Second, the biogas residue biogas liquid is difficult to be fully utilized, and the aerobic treatment effect is poor. In view of the above problems, this paper, on the basis of the previous research by the research group, focuses on the effect of concentrated and dilute distribution on the anaerobic and aerobic treatment system of pig manure. The results are as follows: (1) A productive experiment of solid-liquid separation was carried out in the field of pig manure treatment project. Data test and analysis showed that after solid and liquid separation, COD,BOD5,TS,SS,TKN,TP removal of 10.03 and 19.23 and 6.90 and 10.08 and 14.14 and 14.42 NH _ 3-N were hardly removed. Solid-liquid separation has no obvious effect on concentrated and dilute separation, and the pig manure (solid-liquid separation) after solid-liquid separation is separated by concentrated dilute separation. A good separation effect can still be obtained. (2) the effect of the ratio of concentrated and dilute distribution on the effect of concentrated and dilute separation was investigated. The results showed that the volume and substance of pig manure could be disequilibrium distributed by concentrated and dilute distribution, and most of the pollutants and plant nutrients were distributed to the concentrated sewage with small volume, and the proportion of the concentrated sewage increased with the increase of the proportion of the concentrated sewage. The proportion of pollutants in the concentrated sewage increased, and the proportion in the dilute sewage decreased accordingly. Although the volume of concentrated sewage is only 1030% of the total volume, methane production accounts for 63.38% of the total volume of methane in raw water. (3) the effect of concentration and dilute diffluence ratio on aerobic aftertreatment unit was investigated. The results showed that the aerobic treatment effect was the best at 2:8, the removal rate of COD was 85.45.45 mg/L, the concentration of COD in effluent was about 256 mg/L, the ammonia nitrogen removal was over 99%, and the ammonia nitrogen in effluent was below 5 mg/L. At the end of aeration, the pH value of the mixed solution is above 7.0, and the treatment system is stable. The effect of 3:7 system was the worst, COD was only 56.9%, the effluent COD concentration was higher than 946 mg / L, ammonia nitrogen removal was about 95.0%, effluent water was more than 30 mg/L. At the end of aeration, the pH value is below 7. 0, and the operation of the treatment system is unstable. Considering the biogas fermentation efficiency and aerobic stage treatment effect, 2:8 is the most suitable concentration and dilute distribution ratio. (4) further advanced treatment experiment of SBR effluent was carried out, it was found that flocculation treatment was better than oxidation treatment. The optimum flocculant combination is that the optimum final concentration of lime PAM, is 800 mg/L,2 mg/L, respectively. Under this condition, the effluent COD concentration of flocculation treatment can be reduced to 83 mg/L, ammonia nitrogen 7.36 mg/L,TP 0.3 mg/L, chroma 16 times. The cost of medicament is 0.475 yuan / t sewage. (5) Technical and economic analysis shows that, The treatment of pig manure by Anarwia process and concentrated dilute separation process was comparable and superior to the traditional anaerobic aerobic combination process. At the same time, the biogas fermentation efficiency was significantly improved by the concentrated and dilute separation process, and the volumetric gas production rate was increased by 282% compared with the traditional anaerobic aerobic combination process and Anarwia process. Although the cost of treatment of pig manure by Anarwia process is close to that of Anarwia process, the volume of biogas fermenter of concentrated and dilute separation process is 72.36 less than that of Anarwia process, and the total investment cost of the project is 23.27% less than that of Anarwia process. To sum up, the anaerobic aerobic combination process based on concentrated and dilute distribution can not only improve the efficiency of biogas fermentation, but also solve the problem of poor effect of aerobic treatment of biogas liquid. Compared with the traditional anaerobic and aerobic combination process and Anarwia process, It is a more economical, efficient and reliable process.
【學(xué)位授予單位】：中國(guó)農(nóng)業(yè)科學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X713
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 葛昕;李布青;丁葉強(qiáng);陳志龍;;沼液利用現(xiàn)狀和潛在風(fēng)險(xiǎn)分析[J];安徽農(nóng)業(yè)科學(xué);2012年30期
，本文編號(hào)：2381277
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