The main objectives of this research were twofold: a) to evaluate the performance of a low-temperature pilot-scale upflow anaerobic sludge blanket (UASB) reactor during the treatment of a chocolate-processing industry wastewater (CIW) with high soluble chemical oxygen demand; and b) to evaluate the performance of two thermal conditioning devices (TCDs) for bioenergy recovery through the in-situ biogas use. For 275 days, the UASB reactor was operated at low temperature (17–19 °C), short hydraulic retention time (6.2 h) and variable total organic loading rate (OLR^T) and soluble organic loading rate (OLR^S) (10.3 ± 2.9 kg-COD_Τ/m³/d and 7.9 ± 2.2 kg-COD_S/m³/d, respectively). The produced biogas was burned in-situ with two TCDs, which mainly consisted of an insulated combustion chamber, a heat exchanger and a Bunsen burner. The OLR^T and OLR^S removal efficiencies were 59.5 ± 13.6% and 71.4 ± 13.2%, respectively, whereas the biogas production was in the range of 119–834 L/d. In-situ burning of the produced biogas with the TCDs increased the influent temperature between 0.8 and 5.8 °C, which improved the biogas production of the UASB reactor. The CIW energetic potential was calculated based on the UASB reactor operational parameters, the calorific value of methane in biogas and the daily CIW production (90 m³) of the studied factory. The estimated CIW energetic potential (13.59 MJ/m³_CIW) represents a sustainable source of energy, which could be enough to satisfy the power consumption of 25–42 households in Toluca Valley Metropolitan Area, Mexico.

这项研究的主要目的是双重的：a）在处理具有高可溶性化学需氧量的巧克力加工业废水（CIW）的过程中，评估低温中试规模上流厌氧污泥层（UASB）反应器的性能; b）评估两个热调节装置（TCD）通过现场沼气利用进行生物能回收的性能。在275天中，UASB反应器在低温（17–19°C），较短的水力停留时间（6.2 h）和可变的总有机负荷率（OLR ^T）和可溶性有机负荷率（OLR ^S）（10.3± 2.9公斤-COD _Τ /米³ / d和7.9±2.2千克COD_小号/米³/ d）。产生的沼气用两个TCD现场燃烧，这两个TCD主要由绝热燃烧室，热交换器和本生灯组成。OLR ^T和OLR ^S的去除效率分别为59.5±13.6％和71.4±13.2％，而沼气产量在119–834 L / d的范围内。用TCD现场燃烧产生的沼气可将进水温度提高到0.8至5.8°C，从而改善了UASB反应器的沼气产量。根据UASB反应器的运行参数，沼气中甲烷的热值和所研究工厂的日CIW产量（90 m ³）计算出CIW的高能势。估计的CIW能量潜力（13.59 MJ / m ³ _CIW）代表一种可持续的能源，足以满足墨西哥Toluca谷都会区25至42户家庭的用电量。