农业现代化研究2024，Vol.45Issue(1)：165-175,11.DOI:10.13872/j.1000-0275.2024.0014
不同环境温度下猪场沼液絮凝工艺参数的优化研究
Optimization of flocculation process parameters of pig farm biogas slurry at different ambient temperatures
摘要
Abstract
Flocculation is an efficient and cost-effective technology for treating pig farm biogas slurry,with its effectiveness being significantly influenced by environmental temperature.In order to study the influence of ambient temperature on flocculation efficacy and processing parameters of biogas slurry in a pig farm,this study optimized the flocculation process parameters under three distinct temperature conditions(low:2～9℃,medium:11～17℃,and high:29～36℃)through indoor simulation tests,aiming to explore the best flocculation effect and optimal process parameter values.The results showed that with the increase in ambient temperature,the smaller the optimal value of flocculant dosage and stirring speed,as well as the larger the optimal value of pH;furthermore,the best flocculation effect was achieved under medium temperature conditions,surpassing those at low and high temperatures.The optimal values of the dosage of polyaluminum chloride(PAC),the dosage of polyacrylamide(PAM),the pH value,and the stirring speed under three ambient temperature conditions are as follows:low temperature(7.24 g/L,96.91 mg/L,6.41,381.84 r/min),medium temperature(5.12 g/L,77.61 mg/L,7.22,322.29 r/min),and high temperature(2.93 g/L,21.99 mg/L,8.38,287.62 r/min).Compared with the original process,the cost of flocculant can be reduced by 6.57 Yuan/t,14.33 Yuan/t,and 20.88 Yuan/t,respectively.It was verified that the removal rates of total phosphorus,total nitrogen,and turbidity corresponding to the optimal process could reach more than 82.58%,86.81%,and 51.86%.These findings provide scientific guidance for the flocculation treatment of pig farm biogas slurry under varying ambient temperatures.关键词
猪场沼液/响应面法/絮凝/环境温度/工艺参数优化Key words
pig farm biogas slurry/response surface method/flocculation/ambient temperature/process parameter optimization分类
资源环境引用本文复制引用
方轲,王辉,尹令实..不同环境温度下猪场沼液絮凝工艺参数的优化研究[J].农业现代化研究,2024,45(1):165-175,11.基金项目
湖南省战略性新兴产业科技攻关与重大科技成果转化项目(2020NK2003) （2020NK2003）
国家自然科学基金项目(41471185). Scientific and Technological Breakthroughs in Strategic Emerging Industries and Commercialization of Research Findings Project of Hunan Province(2020NK2003) （41471185）
National Natural Science Foundation of China(41471185). （41471185）
