Department of Environmental Science, School of Engineering and Technology, Central University of Haryana, Mahendergarh, Haryana, India.
Department of Environmental Science and Technology, Centre for Environmental Sciences and Technology, Central University of Punjab, Bathinda, Punjab, India.
Bioresour Technol. 2019 Feb;274:512-517. doi: 10.1016/j.biortech.2018.12.023. Epub 2018 Dec 10.
The aim of present work was to evaluate periodic changes in bakery industry sludge during vermicomposting. Six different blends of cow dung (CD) and bakery industry sludge (BIS) containing 10 to 50% of BIS were assessed in this study. Changes in physico-chemical parameters were evaluated at 21 days interval up to 105 days. Earthworms significantly increased NPK content and EC, while decreased pH, TOC and C: N ratio of BIS. After vermicomposting, TKN, TAP and TK contents increased 2.0-3.5, 1.2-1.9 and 1.2-1.4 times, respectively as compared to initial blends. A significant reduction (65.4-83.5%) in C: N ratio was observed in all blends. The concentrations of metals were found to be higher in the vermicomposts as compared initial blends. It was inferred that bakery industry sludge spiked with cow dung can be biotransformed into valuable manure employing earthworms.
本研究旨在评估堆肥过程中面包工业污泥的周期性变化。本研究评估了含有 10%至 50%面包工业污泥的六种不同比例的牛粪（CD）和面包工业污泥（BIS）混合物。在 105 天内，每隔 21 天评估一次物理化学参数的变化。蚯蚓显著增加了 BIS 的 NPK 含量和电导率，同时降低了 pH 值、TOC 和 C：N 比。堆肥后，TKN、TAP 和 TK 的含量分别比初始混合物增加了 2.0-3.5、1.2-1.9 和 1.2-1.4 倍。所有混合物中的 C：N 比均显著降低（65.4-83.5%）。与初始混合物相比，蚯蚓体内的金属浓度更高。可以推断，用牛粪强化的面包工业污泥可以通过蚯蚓转化为有价值的肥料。
