The effect of salinity was studied on the anaerobic treatment of raw, frozen seafood wastewater. A single‐stage of four organic loading rates (OLRs) ranging from 0.58 to 1.45 kg COD/m³.day and two stages of five OLRs in acidogenic reactors ranging from 0.29 to 2.31 kg chemical oxygen demand (COD)/m³.day were fed into laboratory‐scale bioreactors. The wastewater contained a COD of 1,735 mg/L with high salinity, sodium ion (Na⁺) and nitrogen (N) contents of 8.63 parts per thousand 5,071, and 165 mg/L, respectively. In the single‐stage operation, the COD and total volatile solids (TVS) removal reached maxima of 55 and 63%, respectively, at 0.58 kg COD/m³.day. In the two‐stage operation, the COD and TVS removal were 65 and 70% at the most appropriate OLR of 1.16 kg COD/m³.day. At this OLR, the highest CH₄ content and CH₄ yield obtained were not satisfactory at 26.62% and 71 L (reported at standard temperature and pressure)/kg COD removed, respectively. For both types of operation, the biogas did not contain sufficient methane (CH₄) in all tests at all OLRs. The salts, Na⁺, and N at the levels in this study did not upset the organic removal efficiency but did adversely affect CH₄ production. Two‐stage anaerobic operation could not prevent toxicity due to the characteristics of this wastewater.

中文翻译：

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冷冻海鲜废水的厌氧生物处理

研究了盐度对冷冻生海鲜废水的厌氧处理的影响。一个阶段的四个有机负荷率（OLR）为0.58至1.45 kg COD / m ³ .day，两个阶段的五个有机负荷率（OLR）为0.29至2.31 kg的化学需氧量（COD）/ m ³ .day被送入实验室规模的生物反应器。废水中的COD为1,735 mg / L，盐度高，钠离子（Na ⁺）和氮（N）的含量分别为8.63千分之5071和165 mg / L。在单级运行中，COD和总挥发性固体（TVS）的去除量分别为0.58 kg COD / m ^3时的最大值分别为55％和63％。。天。在两阶段操作中，最合适的OLR为1.16 kg COD / m ³ .day时，COD和TVS的去除率分别为65％和70％。在此OLR中，获得的最高CH ₄含量和CH ₄收率分别为26.62％和71 L（在标准温度和压力下报告）/ kg COD去除效果不令人满意。对于这两种类型的操作，在所有OLR的所有测试中，沼气均不含足够的甲烷（CH ₄）。盐，Na ⁺和N在本研究中的含量不会破坏有机去除效率，但会对CH _4的产生产生不利影响。由于该废水的特性，两阶段厌氧操作无法防止毒性。