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不一样的污染,一样的焦虑:从垃圾分类看农业土壤污染

2019-06-28 16:46:43 来源:农机网原创 作者:四夕 阅读量:47403 评论

导读:在这个轰轰烈烈的高考月,上海人却高唱“我们不一样!”,生活日常就是搜索“XX是什么垃圾”。近日,#快被垃圾分类逼疯的上海居民#话题登上微博热搜榜。截至26日17点,阅读量已超2.4亿,讨论量超7.5万。还有网友调侃:“感觉上门收垃圾的人可以像外卖快递员一样火一下,找个合适的就业商机,以及要不要快速出版一批垃圾分类手册呢?”

  【农机网 编辑视角】在这个轰轰烈烈的高考月,上海人却高唱“我们不一样!”,生活日常就是搜索“XX是什么垃圾”。近日,#快被垃圾分类逼疯的上海居民#话题登上微博热搜榜。截至26日17点,阅读量已超2.4亿,讨论量超7.5万。还有网友调侃:“感觉上门收垃圾的人可以像外卖快递员一样火一下,找个合适的就业商机,以及要不要快速出版一批垃圾分类手册呢?”
 
  垃圾围城:城市光鲜背后的焦虑
 
  事实上,前阵子开播的新一季真人秀综艺《奔跑吧》期就将“垃圾分类”这个热点话题推上了热搜。节目中,“跑男”团遇到的个考验就是现在逼疯上海居民的“垃圾分类”,此后,他们还体验了餐厨垃圾清运及厨余垃圾二次分拣工作,参观了焚烧发电厂。
 
  节目中公布了一系列数据,我们每人每天差不多要产生1.2公斤垃圾;杭州市现在一天的垃圾生产量三到四年就可以把一个西湖填满;从2007年到2019年不到12年的时间里,杭州已经填埋了1700多万吨垃圾,原本预计使用24年的填埋体积,12年就被填满了;杭州市只有的一个垃圾填埋场,那里填满之后,杭州市将没有地方进行垃圾填埋处理;如果没有垃圾填埋场,只需一个星期,杭州市的垃圾就会覆盖所有街道;而我们能做的,就只有等它们自己慢慢降解。
 
  而这仅仅只是一个城市的数据,可以说全国乃至*垃圾增长状况的冰山一角。随着城市化进程的加快,垃圾这个城市代谢的产物成为制约城市发展的瓶颈,世界上许多城市都曾面临“垃圾围城”的局面,城市光鲜背后的垃圾焦虑与日俱增。
 
  净土保卫战:“看不见硝烟的战争”
 
  说到城市污染,农业土壤污染对人类的危害性同样可怕。作为传统农业大国,传承数千年的农业形态在日常生活中占据着重要地位,但是土壤污染问题却因其隐蔽性、滞后性、累积性、不均匀性、不可逆转性和长期性等特点长期困扰着我们。在“蓝天、碧水、净土三大保卫战”中,早在1984年和1987年,我国水污染防治法、大气污染防治法就先后出台,但是土壤污染防治阀却是姗姗来迟的原因也正是在此。
 
  当前我国的土壤污染来源主要包括大气中的有害气体、生活污水和工业废水、化肥农药的大量使用、生物残体和牲畜排泄物以及一些农用地膜和工业、生活固体废弃物等。据相关报道,目前我国受重金属污染的耕地面积近2000万公顷,工业“三废”污染耕地1000万公顷,污水灌溉的农田面积已达330多万公顷,受农药污染的耕地达到1300-1600万公顷。
 
  解救土壤污染:多种农业机械成防治利器
 
  针对土壤污染防治外源污染隔离、灌溉水净化、低积累品种筛选应用、水肥调控、土壤调理、替代种植、秸秆回收利用等技术,小编有以下农业机械推荐:
 
  秸秆还田机器:以玉米秸秆处理利用为重点,大力推进秸秆肥料化、饲料化、燃料化、原料化、基料化利用。多地推进使用秸秆机械化发展,提出大力推广大中型拖拉机、秸秆粉碎还田机、打捆机、秸秆压块(粒、棒)机、秸秆捡拾机、秸秆储运车、秸秆打包机、拆包机、秸秆炭化设备、免耕播种机、带切碎装置的联合收割机、旋耕机水田驱动耙、驱动圆盘犁、免耕灭茬机等农业机械。
 
  施肥施药机:国家大力推广有机肥替代化肥技术,加快推进畜禽养殖废弃物及农作物秸秆资源化利用,实现节本增效、提质增效。主要农业机械有:大型喷药机、静电弥雾机、精量变量喷药机、植保无人飞机、水肥一体机、水药一体机、水药肥一体机等。
 
  残膜回收设备:地膜覆盖栽培技术有着良好的控温保墒作用,但同时也带来了严重的“白色污染”,残膜回收机具是保障地膜回收利用的重要手段。主要农机:多功能铺膜机、残膜回收机、土壤清理机、土壤修复机、厚地膜回收机等。
 
  废弃物处理设备:探索畜禽粪污有效储存、收运、处理、综合利用全产业链发展的有效模式能够防止有害成分通过畜禽养殖废弃物还田对土壤造成污染。主要设备包括:病死畜禽无害化处理设备、沼液沼渣抽排设备、固液分离机、沼气处理设备以及其他废弃物处理设备等。
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