摘要
在冬季低温(10.6℃)连续好氧-缺氧以及全泥龄的运行条件下,挂膜成熟后序批式生物膜工艺(SBBR)、投加填料SBR工艺和传统活性污泥法(CAS)工艺的污泥产率分别为0.171kgMLSS/kgCODremoved、0.207kgMLSS/kgCODremoved和0.315kgMLSS/kgCODremoved。三个工艺中SBBR工艺污水处理效果最佳,其对COD、NH4+-N的去除效果分别达到63.94%和85.36%。在冬季运行条件下,试验第10天和第25天在两种SBBR工艺中先后有大量轮虫和线虫等后生动物的滋生,导致出水中总磷(TP)的明显释放,后生动物的滋生有助于污泥的沉降性能的改善,在SBBR中后生动物的滋生有助于提高系统的硝化作用。
At continuously aerobic-anoxic conditions and with SRT of 47days, the yield rate of residual sludge by sequencing batch biofilm reactor （SBBR）, sequencing batch bioreactor with carriers and conventional activated sludge reactor （CAS） were 0.171kgMLSS/kgCODremoval, 0.207kgMLSS/kgCODremoval and 0.315kgMLSS/kgCOD removal respectively, with removal efficiency of CODcr and NH4^＋-N up to 63.94% and 85.36% of SBBR, which had the best removal efficiency in three reactors. On the 10th and 25th day, Rotifers and Nematode were found breeding in SBBR and SBR with carriers, which resulted in apparently releasing of TP into effluent, and the breeding of metazoan had improved the performance of sedimentation about the sludge. Metazoan breeding in SBBR will be helpful for improving the nitrification.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2008年第5期98-100,共3页
Environmental Science & Technology
关键词
污泥减量
序批式生物膜法
后生动物
sludge reduction
sequencing batch biofilm reactor （SBBR）
metazoan
