肠衣是家畜的大、小肠经刮制而成的坚韧半透明薄膜，主要用作填充香肠和灌肠的外衣；羊肠衣还可制成肠线，供制作网球拍线、弓弦、乐器弦线和外科缝合线等。中国是世界上肠衣最大生产国，其产量约占全世界肠衣产量的80％，其中猪肠衣多产于华东和华中。江苏如皋市目前有400多家肠衣生产加工企业，年产成品肠衣25万桶（50~200L/桶），产量和出口量均占全国1/3以上。肠衣的加工主要包括以下步骤：扯肠清污→入缸浸泡→刮肠净洗→配扎肠把→灌水检查→肠衣的腌制（盐渍肠衣法、干制肠衣法）→肠衣的包装与贮藏运输等。 The casing is a large, shaven, shaven, translucent film made of livestock and is used primarily as a tunic for sausage and enemas. The casing can also be made into a bowel line for making tennis racket lines, bowstrings, instrument strings and surgical sutures. China is the world's largest producer of the casing, which produces about 80 percent of the world's casing production, which is found in east and central China. There are more than 400 casing manufacturing enterprises in jiangsu province, with a yearly production of 250, 000 barrels (50 ~ 200L/barrels), which account for more than 1/3 of the country's output and exports. Casing processing mainly includes the following steps: Victoria intestinal clean-up to immerse into the cylinder, scraping the intestinal net - irrigation check - to match Mr Im washing casing of pickled (salted casing, dried casing) and the packing of the casing and storage transportation, etc. 肠衣加工废水主要来源于肠衣灌水分路工序，据推算我国肠衣加工废水排放量为2250～7500t/d。由于大部分肠衣生产加工企业属作坊式生产，各企业清洁生产水平参差不齐。一般认为，肠衣废水中粗蛋白占8%~10％，氯化物质量浓度约为900~40000mg/L，CODCr为600~20000mg/L。总体而言，肠衣废水超标排放现象严重。为杜绝环境污染，必须将肠衣加工废水进行集中处理，使其达标排放。 It is estimated that the discharge of the waste water of the casing is 2250 ~ 7500t/d. Due to the fact that most of the production and processing enterprises in the intestine are manufactured, the level of clean production is uneven. It is generally believed that the amount of crude protein in the casing is 8 ~ 10% and the concentration of chloride is about 900 ~ 40000mg/L, and the CODCr is 600 ~ 20000mg/L. Overall, excessive discharge of the casing waste water is serious. In order to prevent environmental pollution, the waste water from the casing must be processed and discharged.