城市有机废弃物厌氧发酵沼液絮凝处理及其肥效研究
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摘要
文章利用聚合氯化铝(PAC)和聚丙烯酰胺(PAM)对厌氧发酵沼液进行絮凝处理,以絮凝率和COD去除率为评价指标,在单因素试验基础上,采用Box-Behnken响应面法,研究PAC投放量、PAM投放量和沼液pH值对絮凝率和COD去除率的影响,并建立数学模型,获得沼液处理的最优条件,最后开展沼液肥效的研究。研究结果表明:当沼液的pH值为6.92,PAC的投放量为912 mg/L,PAM的投放量为21.36 mg/L时,沼液絮凝率和COD去除率达到最大,分别为47.96%和45.1%,总氮去除率为51.1%,总磷去除率为44.3%,氨氮去除率为60.3%;处理后的沼液在低浓度下可促进辣椒幼苗的生长,而未处理的沼液对辣椒幼苗的生长有很强的抑制作用。
The digested slurry was treated with polyaluminium chloride(PAC) and polyacrylamide(PAM).The digested slurry flocculation ratio and COD removal ratio were used as evaluation indexes.Based on the single factor test,the Box-Behnken response surface method was used to study the effects of PAC dosage,PAM dosage and pH of the digested slurry on flocculation ratio and COD removal ratio,and established a mathematical model to obtain optimal conditions for the slurry treatment,then tested the fertilizer effect.The results showed that when the pH was 6.92,the dosage of PAC was 912 mg/L,and the dosage of PAM was 21.36 mg/L,the flocculation ratio and COD removal ratio reached the maximum,which were 47.96% and 45.1%,respectively.The total nitrogen removal ratio was 51.1%,the total phosphorus removal ratio was 44.3%,and the ammonia nitrogen removal ratio was 60.3%.The treated slurry can promote the growth of pepper seedlings at low concentration,while the untreated slurry has a strong inhibitory effect on the growth of pepper seedlings.
The digested slurry was treated with polyaluminium chloride(PAC) and polyacrylamide(PAM).The digested slurry flocculation ratio and COD removal ratio were used as evaluation indexes.Based on the single factor test,the Box-Behnken response surface method was used to study the effects of PAC dosage,PAM dosage and pH of the digested slurry on flocculation ratio and COD removal ratio,and established a mathematical model to obtain optimal conditions for the slurry treatment,then tested the fertilizer effect.The results showed that when the pH was 6.92,the dosage of PAC was 912 mg/L,and the dosage of PAM was 21.36 mg/L,the flocculation ratio and COD removal ratio reached the maximum,which were 47.96% and 45.1%,respectively.The total nitrogen removal ratio was 51.1%,the total phosphorus removal ratio was 44.3%,and the ammonia nitrogen removal ratio was 60.3%.The treated slurry can promote the growth of pepper seedlings at low concentration,while the untreated slurry has a strong inhibitory effect on the growth of pepper seedlings.
引文
[1]魏泉源.规模化沼气工程沼液、沼渣减量化及资源化利用研究[D].北京:北京化工大学,2014.
[2]江浩,沈怡,聂红,等.鸡粪与玉米秸秆的干式厌氧发酵实验研究[J].可再生能源,2018,36(5):639-643.
[3]Zirkler D,Peters A,Kaupenjohann M.Elemental composition of biogas residues:Variability and alteration during anaerobic digestion[J].Biomass&Bioenergy,2014,67:89-98.
[4]Abubaker J,Risberg K,Pell M.Biogas residues as fertilisers-effects on wheat growth and soil microbial activities[J].Applied Energy,2012,99:126-134.
[5]隋倩雯,董红敏,朱志平,等.沼液深度处理技术研究与现状应用[J].中国农业科学导报,2011,13(1):83-87.
[6]贺清尧,冉毅,刘璐,等.生物质灰致沼气氮磷脱除研究[J].农业机械学报,2017,48(1):237-244.
[7]冯一伟,柴涛.酸化-复合絮凝法预处理煤化工废水[J].环境工程学报,2016,10(3):1310-1316.
[8]Zheng H L,Sun X P,He Q.Study on Synthesis and Trapping Property of Dithiocarbamates Macromolecule Heavy Metal Flocculant[J].Journal of Applied Polymer Science,2008,110(4):2461-2466.
[9]刘占孟,叶鑫,聂发辉.复合絮凝剂处理冬季低温低浊水的效果及其微观形态[J].中国给水排水,2016,32(3):61-65.
[10]颜东方,贠建民.马铃薯淀粉废水生产微生物絮凝剂菌株筛选及其营养条件优化[J].农业工程学报,2013,29(3):198-206.
[11]马江雅,施军,杨志程,等.响应面法优化PAC与CPAM复配处理模拟废水[J].过程工程学报,2017,17(1):130-137.
[12]魏欢欢,刘庆玉,郎咸明,等.基于响应面法优化反渗透技术去除沼液COD研究[J].中国沼气,2016,34(2):24-29.
[13]刘猛,龙惟定.夏季工况双层皮玻璃幕墙综合传热系数计算模型[J].同济大学学报(自然科学版),2009,37(1):1403-1408.
[14]李建,刘庆玉,郎咸明,等.响应面法优化沼液预处理玉米秸秆条件的研究[J].可再生能源,2016,34(2):292-297.
[15]关正军,王新志,杨一盈.藻类生物絮凝剂对沼液的絮凝效果研究[J].农业机械学报,2017,48(5):290-303.
[16]谷士艳,于美玲,寇巍,等.猪粪与餐厨废弃物混合厌氧消化工艺优化研究[J].可再生能源,2015,33(2):308-313.
[17]Watson M A,Tubic A,Agbaba J.Response surface methodology investigation into the interactions between arsenic and humic acid in water during the coagulation process[J].Journal of Hazardous Materials,2016,312:150-158.
[2]江浩,沈怡,聂红,等.鸡粪与玉米秸秆的干式厌氧发酵实验研究[J].可再生能源,2018,36(5):639-643.
[3]Zirkler D,Peters A,Kaupenjohann M.Elemental composition of biogas residues:Variability and alteration during anaerobic digestion[J].Biomass&Bioenergy,2014,67:89-98.
[4]Abubaker J,Risberg K,Pell M.Biogas residues as fertilisers-effects on wheat growth and soil microbial activities[J].Applied Energy,2012,99:126-134.
[5]隋倩雯,董红敏,朱志平,等.沼液深度处理技术研究与现状应用[J].中国农业科学导报,2011,13(1):83-87.
[6]贺清尧,冉毅,刘璐,等.生物质灰致沼气氮磷脱除研究[J].农业机械学报,2017,48(1):237-244.
[7]冯一伟,柴涛.酸化-复合絮凝法预处理煤化工废水[J].环境工程学报,2016,10(3):1310-1316.
[8]Zheng H L,Sun X P,He Q.Study on Synthesis and Trapping Property of Dithiocarbamates Macromolecule Heavy Metal Flocculant[J].Journal of Applied Polymer Science,2008,110(4):2461-2466.
[9]刘占孟,叶鑫,聂发辉.复合絮凝剂处理冬季低温低浊水的效果及其微观形态[J].中国给水排水,2016,32(3):61-65.
[10]颜东方,贠建民.马铃薯淀粉废水生产微生物絮凝剂菌株筛选及其营养条件优化[J].农业工程学报,2013,29(3):198-206.
[11]马江雅,施军,杨志程,等.响应面法优化PAC与CPAM复配处理模拟废水[J].过程工程学报,2017,17(1):130-137.
[12]魏欢欢,刘庆玉,郎咸明,等.基于响应面法优化反渗透技术去除沼液COD研究[J].中国沼气,2016,34(2):24-29.
[13]刘猛,龙惟定.夏季工况双层皮玻璃幕墙综合传热系数计算模型[J].同济大学学报(自然科学版),2009,37(1):1403-1408.
[14]李建,刘庆玉,郎咸明,等.响应面法优化沼液预处理玉米秸秆条件的研究[J].可再生能源,2016,34(2):292-297.
[15]关正军,王新志,杨一盈.藻类生物絮凝剂对沼液的絮凝效果研究[J].农业机械学报,2017,48(5):290-303.
[16]谷士艳,于美玲,寇巍,等.猪粪与餐厨废弃物混合厌氧消化工艺优化研究[J].可再生能源,2015,33(2):308-313.
[17]Watson M A,Tubic A,Agbaba J.Response surface methodology investigation into the interactions between arsenic and humic acid in water during the coagulation process[J].Journal of Hazardous Materials,2016,312:150-158.
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