客户专栏|10月29日,2021年

食品和饮料行业如何减少用水?

By Emily Newton

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食品和饮料生产和加工消耗大量的水 - 两者都是各种清洁,冷却和公用事业的必备材料。随着气候变化和干旱威胁到现有的水源,企业和消费者正在更加关注大量用途的行业。

通过最佳实践,创新技术和过程变更的合适组合,食品和饮料(F&B)行业的企业可以识别效率低下,并显着降低其耗水量。

Growing Water Scarcity Encourages Efficient Water Usage

业界对水的不断变化的态度背后有两个主要因素。

首先是在整个美国和大部分世界中越来越多的干旱患病率。加州在过去几年中经历了一些最糟糕的干旱。专家认为气候变化可能会使它们更严重,1推动种植者减少工业用水并发现低效现象。

干旱,如野火,野火的淘汰效果也令人鼓舞的是更多保守的水。

在美国之外,情况看起来类似 - 世界人口的五分之一2住在水资源稀缺的地区和四分之一的脸部缺水。专家预测,在未来几年内,这种危机可能会变得更糟。结果,水价可能会上升。

为什么企业正在研究用水管理的新策略

At the same time, growing consumer awareness of companies’ environmental stewardship also has industry leaders reevaluating F&B water consumption that contributes to scarcity3.消费者,尤其是年轻消费者,比以往任何时候都更加关注企业如何使用资源,并优先考虑可持续的做法。

有证据表明消费者愿意花费溢价4在被认为是环保或绿色生产的商品上。这鼓励企业将可持续性作为公司的优先事项。

此外,水是F&B生产的必要投入。减少耗水剂可以通过降低废水处理成本直接和间接地拯救企业资金。新利在线国际

All this means there is a significant opportunity for F&B businesses that can reduce their water consumption.

效率低下的关键领域

根据a、B、F三个关键的造纸行业用水领域5来自Haskell。

The largest is clean-in-place (CIP), the automated cleaning of process equipment with minimal human intervention, which consumes half of all non-product water used in F&B plants.

Heat exchange, in the form of cooling towers, accounts for around 16 percent of F&B water usage, and the remaining consumption is split among various cleaning and utility demands.

通常,在某个中,这些区域中的所有三个都效率低于某种程度。

水Inefficiencies In CIP Systems

CIP was adopted as a way to streamline cleaning and sanitation in F&B plants. Before the advent of CIP, these processes were often labor-intensive, unsafe, inconsistent, and required plant-wide shutdowns, impacting productivity.

Adoption of CIP has improved plant uptime and worker safety. However, inefficiencies in CIP processes generate significant amounts6of water waste.

在典型的CIP卫生过程中,水用于提供初始和最终冲洗,以及在使用苛性碱和酸清洗剂之间进行冲洗。每一个阶段都是浪费的机会。水也可能因设备过大或通过管道从CIP装置输送到正在清洁的工艺设备而流失。

水Inefficiencies In Cooling Towers And Miscellaneous F&B Equipment

冷却塔使用水的蒸发性能来实现高效的热交换。一些冷却塔水分损失是不可避免的 - 在可能无法挽救过程中蒸发的东西。

However, suspended and dissolved solids in cooling tower water can reduce efficiency — increasing the amount of water necessary for them to function properly.

在某些情况下,老化设备也可能导致问题。某些设施,由于其年龄或维护实践,有大量泄漏。维修,更换和有效维护可以帮助这些设施最小化由于泄漏而导致的水损。

识别和减少耗水量和浪费

In addition to identifying key areas of water consumption, the Haskell paper also recommends process changes manufacturers can put into place to reduce usage by up to 50 percent.

想要减少用水量的企业应该从审计当前用水开始。这将提供有关企业用水方式的基本信息。存在各种策略,但有效的审计通常采用全厂方法。他们根据从运营开始到运营结束的总投入和产出来评估消耗。

该审计策略将帮助企业识别与生产过程无直接关系的水过度消耗。例如,场地绿化有时可能是一个重要的消费来源,简单的改变可以减少这些绿化实践7。Treated wastewater or grey water can be used to irrigate site plants.

Allowing grass to grow taller can also reduce the amount of water it needs, as it provides shade that reduces soil water evaporation.

虽然大部分水消耗可能来自CIP,冷却和效用的三个挑战领域,但识别其他耗水领域可以帮助企业最大限度地减少废物。

Reducing Inefficiencies In CIP Systems

用耗材的CIP单位和管道的设计可以显着影响系统性能和效率。例如,超大管道和CIP单位远离他们清洁的公用事业可以不必要地增加系统用水量。

产品回收系统还可以帮助企业最小化耗水量,即使CIP单位是不切实际的。

Flow, temperature, turbidity, and conductivity sensors can form the foundation of a recovery system that minimizes the length of each CIP rinse phase. It can divert product, product-water mixtures and water into separate networks, allowing for reuse and repurposing as livestock feed.

These sensors may also produce valuable process data that can be used to improve models or identify system inefficiencies.

在某些情况下,一次性设备可能允许企业消除完全清洁的需求。然而,这可能意味着浪费塑料,金属和其他材料。结果,这可能并不总是是植物中的水过度公报的理想溶液。

Reducing Inefficiencies In Cooling Towers And Miscellaneous Utility Processes

虽然企业无法恢复因蒸发而损失的损失,但改善的冷却塔水过滤可以减少植物冷却所需的水。

工厂管理人员还可以实施从废物流中重新捕获有价值的组件的系统。这些组件的分离或重新捕获有助于业务恢复价值并节约用水。

例如,携带脂肪和蛋白质的废物流可以用微滤膜过滤,以回收这些成分。蛋白质可以作为产品成分回收,而脂肪不会释放到城市垃圾系统。这种过滤还可以实现更大的现场水重复利用,这通常是将消耗降至最低的最佳方式之一。

Best Practices Can Optimize F&B Industry Water Usage

While food and beverage manufacturing consumes a large amount of water, best practices and equipment changes can help plant owners reduce site consumption.

Rearranging CIP units, upgrading cooling tower filtration and investing in systems that can recapture waste products may help businesses conserve water. Even small changes to site management — like using greywater to irrigate site landscaping — may help a company minimize water waste.

Emily Newton is an industrial journalist. She regularly covers stories for the utilities and energy sectors. Emily is also Editor-in-Chief ofRevolutionized

工具书类

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