利用污泥烧制陶粒滤料的实验研究
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摘要
污泥的处理一直是水处理面临的一大难题,尤其是某些含难降解有机污染物或重金属的污泥.近年来,发现烧制陶粒是这类污泥处置与资源化利用的有效途径之一.以给水污泥、污水污泥和黏土为主要原料烧制陶粒滤料,考察了各主要因素(原料配比、预热温度、升温速率、焙烧温度和保温时间)对产品性能(表观密度、堆积密度和吸水率)的影响.结果表明:以3种原料烧制陶粒滤料是可行的,预热温度对陶粒滤料性能影响不大,原料配比、升温速率、焙烧温度和保温时间对陶粒滤料的性能有不同影响.
Sludge treatment has always been a major challenge for water treatment,especially for some sludge containing refractory organic pollutants or heavy metals.In recent years,it has been found that fired ceramsite is one of the effective ways to dispose and recycle such sludge.The waterworks sludge,sewage sludge and clay are taken as the main raw materials to sinter ceramsite filter material,and the effects of the main factors including the ratio of raw material,preheating temperature,heating rate,sintering temperature and holding time on the performance of the product such as apparent density,bulk density and water absorption in one hour are investigated.The results show that it is feasible to make ceramsite filter material with three kinds of raw materials,and the preheating temperature has little influence on the performance of ceramsite filter material.The ratio of raw materials,heating rate,sintering temperature and holding time have different influences on the performance of ceramsite filter material.
Sludge treatment has always been a major challenge for water treatment,especially for some sludge containing refractory organic pollutants or heavy metals.In recent years,it has been found that fired ceramsite is one of the effective ways to dispose and recycle such sludge.The waterworks sludge,sewage sludge and clay are taken as the main raw materials to sinter ceramsite filter material,and the effects of the main factors including the ratio of raw material,preheating temperature,heating rate,sintering temperature and holding time on the performance of the product such as apparent density,bulk density and water absorption in one hour are investigated.The results show that it is feasible to make ceramsite filter material with three kinds of raw materials,and the preheating temperature has little influence on the performance of ceramsite filter material.The ratio of raw materials,heating rate,sintering temperature and holding time have different influences on the performance of ceramsite filter material.
引文
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[2]张宏华,潘丽铭,潘永智.不锈钢行业铬镍污泥制砖的可行性研究[J].浙江工业大学学报,2013,41(3):295-299.
[3]郑小艳,胡艳军,严密,等.污水污泥高温热解残渣孔隙结构特性分析[J].浙江工业大学学报,2015,43(2):202-206.
[4]雷一楠.污水污泥烧制陶粒对重金属固化效果的试验研究[D].重庆:重庆大学,2009.
[5]陈伟,钱觉时,刘军,等.污水污泥页岩烧结制品的重金属固化与水环境浸出稳定性[J].硅酸盐学报,2012,40(10):1420-1426.
[6]HALLC J E.Sewage sludge production,treatment and disposal in the European Union[J].Water&environment journal,1995,9(4):335-343.
[7]张清敏,陈卫平,胡国臣,等.污泥有效利用研究进展[J].农业环境护,2000,19(1):58-61.
[8]XU G,ZOU J,LI G.Ceramsite made with water and wastewater sludge and its characteristics affected by SiO2and Al2O3[J].Environmental science&technology,2008,42(19):7417-7423.
[9]RILEY C M.Relation of chemical propertiesto the bloating of clays[J].Journal of the American ceramic society,1951,34(4):121-128.
[10]许国仁,部金龙,李圭白.污泥资源化新技术-轻质污泥陶粒的研制[J].城镇供水,2008(2):31-44.
[11]王征,郭玉顺.粉煤灰高强陶粒烧胀规律的试验研究[J].新型建筑材料,2002(2):10-14.
[12]樊树辉.轻质黏土陶粒烧成机理浅析[J].新型建筑材料,1991(2):35-37.
[13]唐小辉,赵力.污泥处置国内外进展[J].环境科学与管理,2005,30(3):68-71.
[14]杨国录,陈永喜,袁秀丽,等.广州市污泥处置技术方案及对策[J].武汉大学学报,2009,42(6):726-730.
[15]SAKTAYWIN W,TSUNO H,NAGARE H,et al.Advanced sewage treatment process with excess sludge reduction and phosphorus recovery[J].Water research,2005,39(5):902-911.
[16]MUN K J.Development and tests of lightweight aggregate using sewage sludge for nonstructural concrete[J].Construction&building materials,2007,21(7):1583-1588.
[17]迟培云,张连栋,钱强.利用淤积海泥烧制超轻陶粒研究[J].新型建筑材料,2002(3):28-30.
[18]杜欣,金宜英,张光明,等.城市生活污泥烧结制陶粒的两种工艺比较[J].环境工程学报,2007,1(4):109-114
[19]刘雨,赵庆良,郑兴灿.生物膜法污水处理技术[M].北京:中国建筑工业出版社,2000.