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结合4万m3/d污水处理及回用工程的调试实践,对采用曝气生物滤池技术处理焦化尾水和钢厂杂排水的处理效果进行研究。结果表明:曝气生物滤池有一定的抗有机负荷冲击能力;对SS的去除效果好;进水有机负荷的大小是影响氨氮去除效果的一个重要因素;B/C是曝气生物滤池降解有机物效果好坏的重要因素。根据调试中实际操作情况确定:水反冲洗强度为5.83 L/(m2.s);气反冲洗强度为16 L/(m2.s);反冲洗周期为5 d,各反冲阶段时间分配:气洗时间为5 min,气水联合洗时间为3 min,水漂洗时间为5 min,反洗后,大约6 h出水恢复到反洗前的处理效果。
Combined with the commissioning practice of 40,000 m3 / d wastewater treatment and reuse engineering, the treatment effect of using aerated biological filter technology to treat coking tailwater and miscellaneous drainage of steel mills was studied. The results showed that aerated biological filter had a certain ability of resisting organic load impact, good effect of SS removal, and the size of organic load of water influent was an important factor affecting the effect of ammonia nitrogen removal. B / C was degraded by biological aerated filter An important factor in the effectiveness of organic matter. According to the actual operation conditions in the commissioning, the water backwashing intensity is 5.83 L / (m2.s); the backwashing intensity is 16 L / (m2.s); the backwashing period is 5 days; Air wash time was 5 min, gas-water combined wash time was 3 min, water rinse time was 5 min, after backwashing, about 6 h effluent returned to the pre-wash effect.