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首页> 外文会议>Residuals and biosolids conference >Managing an Ever-Changing Stream of Organic Materials for Co-Digestion at the Hermitage Municipal Authority - From Impounded Honey and Rotten Vegetables to Biogas Success
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Managing an Ever-Changing Stream of Organic Materials for Co-Digestion at the Hermitage Municipal Authority - From Impounded Honey and Rotten Vegetables to Biogas Success

机译：在冬宫市管理局管理有不断变化的有机材料流 - 从被扣除的蜂蜜和腐烂的蔬菜到沼气成功

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The Hermitage Municipal Authority ("Authority") completed upgrades at their Water Pollution Control Plant ("WPCP") in May 2014 which expanded wastewater treatment capacity and introduced a Two-Phase Anaerobic Digestion ("2PAD") complex to the current plant operations. This 2PAD complex optimized the solids handling train by further promoting biosolids stabilization, biogas recovery, and the generation of both heat and power. Biogas produced during the breakdown of Volatile Solids in the anaerobic digesters can be collected and be upgraded for several applications including combustion fuels for combined heat and power generation. Although waste activated sludge has been the traditional source of feedstock for the digesters, the Authority has vigorously pursued alternative feedstocks to improve biogas generation and yield. As part of the upgrades completed in May 2014, a liquid based food waste receiving facility was constructed and contains equipment used to puncture, squeeze, and separate liquid food waste from its packaging. The liquid food waste is then collected and conveyed into the 2PAD system for digestion. Deliveries of liquid based food waste to date have largely been liquid or powder and originate from local food manufacturers like Dean Dairy Foods and Joy Cone. Common deliveries included expired milk, yogurt, cottage cheese, cultured butter, half & half, heavy whipping cream, fruit punch, lemonade, iced tea, cake batter, flour, and sugar. While these products have led to increased biogas production through co-digestion and a valuable source of income for the Authority, the Authority felt they were only reaching a portion of the overall market and could expand further their operations with solid based food waste receiving. After completion of pilot testing and market exploration, the Authority constructed in the summer of 2016 a solid based food waste receiving facility and began processing a wider variety of feedstocks for co-digestion. These feedstocks have included vegetable trimmings and cuttings, raw meat, tortillas, black beans, ice cream, whole butter and butter packets, and unseparated food scrapings and trash from institutional cafeterias. With selection and operation of a turbo-separator, the Authority has maintained a high level of feedstock quality and been able to partner with recycling firms for packaging disposal. The Authority's success in handling this wide variety of feedstocks (liquid and solid) has been in part to equipment selection but largely from innovative operations to manage labor requirements with the value of the feedstock in biogas production. These innovations have allowed the Authority to process the food waste with very high organics recovery rates and positioned the Authority to economically compete with traditional food waste disposal methods such as landfilling and composting. These efforts, coupled with marketing of their services, have led the Authority to process food recalls from over twenty-six states and the verified destruction of counterfeit foreign honey seized by the US Treasury Department. This counterfeit honey destruction comprises over 6,000 barrels of honey in a rapid timeframe, with a market value more than 3mm US dollars. This paper will explore the types of feedstocks the Authority has successfully, and in some cases unsuccessfully, processed at the facility and techniques and methods the Authority has pioneered to efficiently handle the wide variety of changing feedstocks. Data will be presented on the increase in biogas production from the various feedstocks and the financial impact, both in tipping fees and in enhanced electrical generation. Biogas formation rates, accelerated by the 2PAD process will also be reviewed to see the impact of thermophilic digestion on the food waste.
机译：冬宫市管理局（“授权”）于2014年5月在水污染控制厂（“WPCP”）完成升级，扩大了废水处理能力，并向目前植物操作介绍了两相厌氧消化（“2PAD”）复合物。该2PAD复合体通过进一步促进生物溶解，沼气回收以及热量和功率的产生优化固体处理火车。可以收集在厌氧消化器中挥发性固体崩溃期间产生的沼气，并升级为几种应用，包括用于组合热和发电的燃烧燃料。虽然废物活化污泥是消化器的传统原料来源，但管理局积极追求替代原料，以提高沼气生成和产量。作为2014年5月完成的升级的一部分，构建了一种液体的食品废物接收设施，并含有用于从其包装中刺穿，挤压和分离液体食物废物的设备。然后收集液体食物废物并输送到2Pad系统中以进行消化。迄今为止迄今为止的液体食品废物的交付量主要是液体或粉末，源自当地食品制造商，如院长乳制品食品和喜悦锥。常见的交货包括过期牛奶，酸奶，奶酪，培养黄油，半左右，重型搅打奶油，水果拳，柠檬水，冰茶，蛋糕面粉，面粉和糖。虽然这些产品通过共同消化和管理局的有价值的收入来增加了沼气产量，但管理局认为他们只达到整体市场的一部分，并可以通过基于固体的食物废物接收来扩展其运营。在完成试点检测和市场勘探后，管理局于2016年夏季建造了基于固体的食物废物接收设施，并开始加工各种原料进行共消化。这些原料已包括蔬菜修剪和扦插，生肉，玉米饼，黑豆，冰淇淋，奶油整体奶油包，和未分离的食物碎屑和垃圾从机构食堂。随着涡轮分离器的选择和运营，管理局保持了高水平的原料质量，并能够与回收公司合作以进行包装处理。管理局在处理这各种原料（液体和固体）的成功已在部分设备的选择，但主要来自创新业务与沼气生产原料的价值来管理劳动力需求。这些创新允许有权通过非常高的有机物回收率来处理食物垃圾，并定位了经济竞争的权威，以与填埋和堆肥等传统食品废物处理方法竞争。这些努力加上他们的服务营销，导致从2009多个州的加工食品回忆以及由美国财政部扣押的假冒外国蜂蜜进行了验证的销毁。这种假冒蜂蜜破坏在快速的时间范围内包含超过6,000桶蜂蜜，市场价值超过3毫米美元。本文将探讨当局已成功的原料类型，在某些情况下，在设施和技术和方法中处理的情况下，该权限已开创有效处理各种变化的原料。将提出数据从各种原料和财务影响的沼气生产增加，无论是在划线费和增强的发电中。沼气形成率，2PAD过程加速加速，也将审查，以便看到嗜热消化对食物垃圾的影响。

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