Dehydration of bael pulp in to powder form is a challenging operation, mainly due to the sticky issue of bael pulp and caking of powder during handling and storage. To overcome on this problem maltodextrin MD (drying aid) and tricalcium phosphate, TCP (anti caking agent) were added to the bael pulp at four levels along with control and dried in a mechanical drier into thin layer at 58 ± 2 °C for 12 h, to obtain a moisture content of 4–5 % in dehydrated pulp. The dehydrated bael pulp was grounded in a laboratory powder mill and sieve with 30 mesh sieve. The powder was packed in 150gauge PP, 400gauge LDPE and 200gauge HDPE pouches and was stored at low temperature (7 °C) and ambient condition (18–35 °C) up to 6 months for storage study. The powder was evaluated for its quality characteristics in respect of acidity, sugars, antioxidant, phenol, ascorbic acid, non- enzymatic browning (NEB) before packaging and during storage. The amount of MD and TCP required to reduce powder stickiness and caking were optimized on the powder properties. The amount of MD (0.25 kg per kg dry bael solids) and TCP (0.15 kg per kg dry bael solids) with the values of degree of caking (19.24 %) and stickiness point temperature (45.4 °C) were found to be optimum for reducing the powder stickiness, caking and nutritional parameters. The adsorption isotherm of bael powder was found to be type-II sigmoid and 200 g HDPE as packaging material followed by storage at low temperature were selected as best process.
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机译：将Bael纸浆脱水成粉末形式是一项具有挑战性的操作，主要是由于Bael纸浆的粘性问题以及在处理和存储过程中粉末的结块。为了克服这个问题，将麦芽糊精MD（干燥助剂）和磷酸三钙，TCP（抗结块剂）与对照一起以四个含量添加到了贝尔纸浆中，并在机械干燥机中于58±2°C下干燥成薄层，保持12 h，在脱水纸浆中获得4-5％的水分含量。将脱水的贝尔纸浆在实验室粉末磨中研磨并用30目的筛子筛分。将粉末包装在150规格的PP，400规格的LDPE和200规格的HDPE袋中，并在低温（7°C）和环境条件（18-35°C）下保存长达6个月，以进行存储研究。在包装之前和储存期间，就粉末的酸度，糖，抗氧化剂，苯酚，抗坏血酸，非酶褐变（NEB）评估了其质量特性。降低粉末粘性和结块所需的MD和TCP量在粉末性能上进行了优化。发现对于结块度（19.24％）和粘性点温度（45.4°C）值，MD（0.25 kg / kg干贝尔固体）和TCP（0.15 kg / kg干贝尔固体）的量最适合降低粉末的粘性，结块和营养参数。发现贝尔粉末的吸附等温线为II型乙状结肠，并选择200g HDPE作为包装材料，然后低温储存为最佳工艺。
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