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节水小课堂|工业农业如何有效节水?

  • 2026-03-29 08:52:54
节水小课堂|工业农业如何有效节水?

节水小课堂

水,是生产发展的根基,工业制造的运转、农业作物的生长都离不开水资源的滋养在工业生产的流水线、农业耕种的田垄间,也藏着诸多被忽视的节水误区,看似常规的操作,实则造成了水资源的大量损耗。今天的节水小课堂聚焦工业与农业节水拆解两大领域的常见误区,教你用科学方法,让水资源在生产中发挥最大价值。

误区1:工业生产用水一次性使用,直接排放更省事

不少企业认为:“生产用水直接排放,省去处理环节,省时又省力,后续再引新水即可。”

工业用水的核心节水逻辑,在于循环与梯级利用,而非单次消耗。

工业生产中,不同工序对水质要求差异显著,冷却、清洗等环节的用水,经简单处理后可再次用于低水质要求的工序即使是高耗水环节产生的废水,经深度处理后也能实现回用。直接排放不仅浪费大量水资源,还增加了排污成本,而我国先进企业的工业废水回用率已能达到97%以上,循环冷却水利用率更是超98%[1]单次用水直接排放的方式,与高效节水的生产模式相悖。

推行“分质处理、梯级利用”,按工序水质需求调配用水

配套水循环处理系统,实现冷却用水、洗涤用水循环回用

沿海工业企业因地制宜开发海水淡化,替代淡水用于冷却等环节工业节水

误区2:工业节水只是更换设备,与生产工艺无关?

很多企业觉得:“只要换上节水设备,就能实现节水,生产流程没必要调整。”

错!工业节水是系统工程,设备升级需配合工艺优化,才能实现节水最大化。

单一更换节水设备,若生产工艺仍存在用水冗余,节水效果会大打折扣。比如蒸汽冷凝水若不做闭式回收,仅靠高效冷却设备,仍会造成大量水资源损耗而将工艺改革与热联合结合,优化生产流水线,再搭配节水设备,能实现能源与水资源的双重节约国家鼓励的工业节水工艺中,循环水电化学处理技术搭配工艺优化,可实现30%-80%的节水效果[2],远高于单一设备的节水能力。

✔️结合生产特点优化工艺流程,减少生产环节的无效用水

✔️将节水技术与生产工艺融合,如逆流漂洗替代顺流漂洗,降低洗涤耗水

✔️搭建智能用水监测系统,实时调控设备参数,减少蒸发与渗漏损耗

误区3:农业灌溉大水漫灌,浇得越透作物长得越好?

不少农户认为:“大水漫灌把地浇透,土壤水分足,作物肯定能高产,省得频繁浇水。”

大水漫灌的灌溉效率极低,还会造成水资源的严重浪费与土壤问题。

我国农业灌溉利用系数仅0.45,大水漫灌过程中,大量水分会通过渠道渗漏、深层渗透和地表蒸发流失,真正被作物根系吸收的水分不足一半且过度漫灌会导致土壤板结,作物根系缺氧,反而影响生长。滴灌、喷灌节水灌溉方式,能精准将水分输送至作物根区,滴灌比漫灌节水30%-50%,喷灌节水20%-30%,还能提升作物产量10%-20%[3]

✔️摒弃“浇地”思维,转为“浇作物”,采用滴灌、喷灌、管灌等节水灌溉技术

✔️根据作物生长阶段浇水,苗期浅浇,旺长期按需灌溉,避免盲目浇透

✔️铺设防渗渠道或管道输水,减少灌溉过程中的渗漏损耗 科学灌溉,既省水又增产,农业种植更高效

误区4:农业节水就是少浇水,减少灌溉次数就行?

很多农户下意识认为:“节水灌溉就是少浇几次水,降低用水量就达到目的了。”

错!农业节水的核心是提高水资源利用率,而非单纯减少灌溉水量。

节水灌溉是用最少的水量消耗,实现作物最大的产量收益,核心是减少水分的无效损耗,而非让作物处于缺水状态。

比如膜下滴灌技术,通过地膜覆盖减少水分蒸发,滴灌精准供水,既减少了总用水量,又能保证作物根系水分充足;而单纯减少灌溉次数,会导致作物缺水,反而降低产量。农艺措施与节水灌溉结合,如选用耐旱品种、施用保水剂,能进一步提升水资源利用效率。

✔️采用“小水勤浇”的微灌模式,仅湿润作物根区土壤,减少无效蒸发

✔️结合农艺措施,搭配耐旱品种、生物覆盖,提升土壤保水能力

✔️根据土壤墒情和作物需水规律科学灌溉,避免盲目浇水或刻意少浇 找对节水核心,科学管控灌溉,节水与高产可兼得

END

[1]人民日报-工厂车间节水有招(深阅读·加快建设节水型社会)https://paper.people.com.cn/rmrbwap/html/2024-10/17/nw.D110000renmrb_20241017_1-04.htm

[2]人民日报-工厂车间节水有招(深阅读·加快建设节水型社会)https://paper.people.com.cn/rmrbwap/html/2024-10/17/nw.D110000renmrb_20241017_1-04.htm

[3]【农民日报】现代灌溉装备助力高效节水农业加速发展——写在第37“中国水周” 之际

https://ifi.caas.cn/xwzx/mtbd/81a14b0f88e24f5ebe35832e824992c8.htm

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  1. CONNECT:[ UseTime:0.000761s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001476s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001346s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001830s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001678s ]
  6. SELECT * FROM `set` [ RunTime:0.002646s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001687s ]
  8. SELECT * FROM `article` WHERE `id` = 495876 LIMIT 1 [ RunTime:0.007342s ]
  9. UPDATE `article` SET `lasttime` = 1774822404 WHERE `id` = 495876 [ RunTime:0.008217s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000648s ]
  11. SELECT * FROM `article` WHERE `id` < 495876 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001245s ]
  12. SELECT * FROM `article` WHERE `id` > 495876 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001690s ]
  13. SELECT * FROM `article` WHERE `id` < 495876 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.020870s ]
  14. SELECT * FROM `article` WHERE `id` < 495876 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.014334s ]
  15. SELECT * FROM `article` WHERE `id` < 495876 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007754s ]
0.168292s