ANALYSIS OF RECYCLING APPLICATION AND RISK CONTROL OF BOTTLE WASHING WASTEWATER IN CHINESE BAIJIU INDUSTRY
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摘要: 为保障白酒包装洗瓶废水的安全高效再生利用,分析了废水水质特征,识别出不同再生利用途径的风险类型和主要风险因子,提出了管控措施建议。结果表明,洗瓶废水污染水平较低,污染物浓度略高于相应水质标准,悬浮物(SS)、有机物和微生物等是主要风险因子,其引发的再生利用主要风险包括食品安全危害、由微生物生长导致的健康风险危害、磨损、堵塞和损坏设备等方面。不同再生利用途径的保护对象不同、关注的特征污染物不同,是导致风险差异的主要原因。去除悬浮物是洗瓶废水再生利用风险管控必要措施,去除有机物和营养物质、控制细菌数是不同途径的风险管控要点。洗瓶废水宜用于农业利用,其次用于工业冷却、洗涤及生产、城市杂用、景观环境和洗瓶工艺。结合泸州案例提出了洗瓶废水再生利用策略和管控措施。未来应着眼于洗瓶废水再生利用风险全过程控制,拓宽废水再生利用途径,并将其融于城市水生态循环梯级利用模式中。研究的相关信息可为洗瓶废水的安全再生利用提供理论依据和技术参考。Abstract: To guarantee the safe and efficient recycling of bottle washing wastewater for the Chinese baijiu industry, wastewater characteristics were analyzed, the risk types and factors of different recycling pathways were identified, and then the control methods also were proposed.Resultsdemonstrated that bottle washing wastewater was with a low level of contamination, and the concentration of pollutants was slightly higher than the corresponding water quality standard. Suspended solids, organic matters, and bacteria were the main risk factors, which could trigger some risks for each recycling situation, such as food safety, health risks from microorganisms, nozzles clogging and damaging equipment, etc. The main reason for the differences in risk is that different recycling pathways have different protection targets and focus on different characteristic pollutants. Suspended solids removal was the necessary control measure for bottle washing wastewater recycling. Removal of organic matters and nutrients, and control of bacterial counts were the key control points for each situation respectively. Bottle washing wastewater should be reused for agriculture irrigation as a priority, followed by industrial cooling, washing and production, miscellaneous use in cities, environmental use in landscapes, and reuse in bottle washing processes. The strategies and measures for bottle washing wastewater reuse for Luzhou were proposed. In the future, we should focus on the full process control of the risk of recycling bottle washing wastewater, broaden the ways of wastewater recycling, and integrate it into the urban water ecological cycle cascade utilization. This paper can provide the theoretical basis and technical reference for the safe recycling of bottle washing wastewater.
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Key words:
- bottle washing wastewater /
- recycling application /
- risk /
- control
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