发展制糖工业
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糖,虽然不像盐一般,为人类生存所必须,却是人类饮食生活当中一项非常重要而且昂贵的农产加工品。更多小说ltxs520.com事实上,即便在工业革命后,制糖业一直是一项非常赚钱的产业。中国唐代初期,糖是贡品,只有皇室能够尝到,唐中叶以后,才日渐走向民间。宋代的工商业颇为繁华,据记载城市当中已经有“诸般糖作坊”,《东京梦华录》卷二中“州桥夜市”就有“素签沙糖、鸡头穰沙糖”等小吃的记载,“饮食果子”里则有“西川乳糖、狮子糖”等等甜点。不过,即便如此,糖或者甜品还是非常昂贵的东西。石越知府杭州,组织官民船队贸易高丽、日本。糖,无疑为高利润产品之一。东北亚,尤其是日本不产糖,糖价贵如天。贩糖于高丽、日本,更重要的是,当时世界上并没有白砂糖。你先前提到要让石越主管工商发展经济政策,而书评区好像很多人觉得应该要多发展一些科技,两相结合下,我想到制糖工业。稍稍改良制糖工艺,似为可行,而且也真的可以做到大规模生产喔!如果采取国营糖厂的方式,甚至可以以兵养兵。
根据粤闽台一带的气候,二月植蔗,九月起开始陆续采收,十一、二月为制糖场开工之时。四川也是中国产糖大省,但因为气候略冷,所以要等到植蔗期要推迟到三、四月间,而制糖一般是农历春节前后,春节前制成的糖,叫冬班糖,春节后制成的,叫做春班糖。湘赣两浙亦可种甘蔗,只不过地理略逊前四省。宋季,台湾尚未入版图,所以制糖业主要集中川闽粤。
不过,糖场一年只开工两至三个月,时间很短,若设场常川雇工制糖,所费不赀,所以中国制糖都是小规模农户合资生产的,或者富户雇用临时工来生产,单一产量较小。所以我就假想公家出资兴建煮糖器具,养役使牛马,当可形成大规模官营事业,而人力来源就用邻近驻军,让当地驻军进驻糖场,工作两月,贩糖所得,足以养千百倍之兵。一年当中另有十个月的时间可供操练,所养耕牛骡马又能让军队平日役使之用,我个人认为是个可行的方法。
以下略略说明工业革命以前甘蔗制糖的方法:甘蔗的栽植有所谓的“春植”、“秋植”和“宿根”三种。“春植”顾名思义是春天栽种的甘蔗,来年就可采收;第一次采收后的甘蔗根部留置在土壤内(留头),让其发芽生长谓之“宿根”,它相当于“春植”,一年后就可采收;至于“秋植”,则是七月到十月这段时间种的甘蔗,当年不能采收,必须拖个一年半左右。
古时采收甘蔗满辛苦,全是人工采收后,“揽蔗根仔”(清除不需的蔗叶、泥土、根部的须须等),接着捆绑,然后用牛车运送到制糖工场。甘蔗采收运送到工厂后,略略清洗,然后送进“石车”(压榨机)压榨,石车是由两个花岗石制成的圆柱形石磨制成,以牛拉石磨,甘蔗从两个圆柱石磨中夹碾而过取得蔗汁,并产生蔗渣。手工业时代,压榨比较不彻底,只压榨一次,无法将蔗髓当中的糖汁都榨取出来,浪费蛮多有用资源的,适度增加压榨次数,可以增加产量。不过在兽力时代,后续压榨恐怕要用更重的石磨,因此拉磨的牛只数目恐怕也要多一点。根据文献记载,两个石磨组成的石车,需要12到13头牛来拉磨,如果多用一组且更重的石车,会需要超过此数的牛只。
蔗汁加热后,加入石灰净化,让杂质沉淀,取得较清澈的甘蔗汁,称为“清净汁”。然后将清净汁煮至羹状,沾之会黏手时,一边冷却一边以木棒搅拌,使糖浆能均匀结晶成颗粒状,即俗称黑砂糖或红糖的赤糖。烹煮时会有杂质浮沫产生,以木瓢捞出,冷却沉淀后可作为养猪饲料,或拿来酿酒。
一般来说,双磨石车制造黑糖,若全凭兽力与人力,每日大概可以处理5000公斤的甘蔗,并于当日内煮成黑糖。这并不包括采收、前期清理和运送所需的时间,那是蔗农的事情。
唐宋时期,蔗糖的大块结晶体—冰糖被发明,最早记述造冰糖技术的是南宋期间遂宁人王灼的《糖霜谱》记述了四川遂宁、广汉、内江等五郡产冰糖,以遂宁为冠,如琥珀珍玉。苏东坡过金山寺时曾写了一首诗赠予遂宁和尚圆赞,有“冰盘荐琥珀,何似糖霜美”之句。遂宁当时制糖霜的工艺大致如下:十月至十一月,先将蔗汁制成沙糖。然后再把沙糖溶化,把溶化后的糖浆注入插着竹梢排的漆瓮中。到春节后,糖浆开始结晶。到五月,结晶不再增大,此时将精结晶取出放在烈日下晒干,就是糖霜。当时的这种糖霜,紫色者为上品,浅白色者为下品,与今之冰糖不同。
明代以前,中国只有这种黑砂糖或者前述冰糖,所谓白糖其实并不白,只比黑糖颜色略淡,而且精制过程相当费时并且昂贵。《泉南杂志》中有如下记载:“用甘蔗汁煮黑糖,烹炼成白。劈鸭卵搅之,使渣滓上浮”,方法是把黑糖放进锅中,用水溶化,然后把锅烧开,糖水滚动,浮沫升起,撇掉浮沫,咸鸭蛋打碎后放入糖水中搅拌,把许多杂质裹在里面,把它撇掉,杂质就减少了一些。就这样,一直煮下去,再煮再撇,直到没有浮沫升起为止。
真正精制白砂糖的技术要到明嘉靖年中,才被偶然发现。根据《天工开物》中的记述如下:“去孔中塞草,用黄泥水淋下,其中黑滓入缸内,溜内尽成白霜。最上一层厚五寸许,洁白异常,名曰西洋糖,下者稍黄褐。”实际上的做法是取出赤糖中颗粒大而完整、比较不干净的颗粒,装入漏斗状的陶缸中,淋上一遍又一遍的黄泥水,使黑渣顺孔流出,上层的糖自然变白,愈上层愈洁白,就是白糖。所以利用这种方式可以取出上层的白砂糖,中层的黄砂糖,下层的褐砂糖。
至于流出的黑色残渣则称为糖蜜,可用来酿造酒。酿出的酒之过滤后,兑上以米酿造而成的米酒,即可饮用或作为料理用酒。兑米酒比例大概是米酒六,糖蜜酒四。
而蔗汁加石灰沉淀后的泥浆称为“滤泥”,含有大量有机质,养分颇高,是极佳的肥料。蔗渣是甘蔗压榨过程中所残余的废弃物,为了节省燃料支出,糖厂予以回收晒干后当柴火煮糖,甘蔗枝叶与蔗皮也是主要燃料来源。基本上,制糖燃料无须外求。事实上,往往因为蔗渣太多,而将多余蔗渣当堆肥使用。但蔗渣是可以拿来制造纸浆的,甚至制成蔗渣板,作为建材隔版使用。
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