Study on treating municipal sewage with SBR strengthened by EM

EM(EffectiveMicroorganisms)是由光合细菌、酵母菌、乳酸菌和放线菌等为主的80多种有益微生物复合培养而成的一种新型微生物活菌剂。本文着重研究将EM菌液引入SBR工艺中，构建高效EM-SBR生物反应器，研究新型高效EM-SBR反应器与普通SBR反应器在有机物降解和脱氮除磷功能方面的差别，以及污泥龄、EM投加量、进水中有毒物质等对出水水质的影响。试验采用5个SBR反应器做平行对比试验，分别为：1#——传统SBR，2#~5#——分别添加EM菌液0.1‰、0.5‰、1‰、5‰，试验水样为实际生活污水。试验结果表明：（1）5个SBR反应器对COD的平均去除率都在80%以上，并且相...EM(Effective Microorganisms) is a new kind of micro-organism-activated reagent, which is composed mainly by photosynthetic bacteria, microzyme, lactobacillus, and other effective bacteria. The important point studied in this paper is EM addition to the SBR, setting up high- efficient EM-SBR reactor, effect of EM addition to the SBR on the removal speed and removal rate of COD, total nitrogen, tota...学位：工学硕士院系专业：海洋与环境学院环境科学与工程系_环境工程学号：2122005130224

Adsorption Characteristics of Arsenic in Water by Cerous Hydroxide

研究了氢氧化铈对水中砷的吸附特性,结果表明:氢氧化铈对As(Ⅲ)和As(Ⅴ)均有良好的吸附效果,其吸附等温线能很好地用Langmuir方程描述。酸性条件下有利于As(Ⅴ)的吸收,而中性/微碱性条件下有利于As(Ⅲ)的吸收。氢氧化铈粉末粒径及共存离子对吸附效果影响甚微,通过TCLP测试可知吸附后的粉末对环境无二次污染。The adsorption characteristics of arsenic in water by cerous hydroxide were studied.The results showed that cerous hydroxide had well adsorption effect for trivalent arsenic and pentavalent arsenic.The adsorption isotherms fitted very well for Langmuir equation.It was more suitable to adsorb pentavalent arsenic in an acidic condition,whereas adsorb trivalent arsenic in neutrality/slightly alkaline conditions.The adsorption effect of particle diameter and the coexisted ions of cerous hydroxide were feeble.The powder after adsorption did not have secondary pollution to environment by TCLP test.福建省自然科学基金计划项目(D0510005

Content and partitioning and study on removal technology of heavy metals in tentative dredged sediments of Xiamen western harbor

着重研究了厦门西海域拟疏浚物中重金属的含量和赋存形态,探讨了化学试剂浸提和曝气法去除重金属的可行性,为建立后续的去污染方案提供科学依据。厦门西海域拟疏浚物枯洪两季沉积物中重金属含量变化不大,枯季稍高于洪季。从经济角度考虑,选用C2H2O4、(nH4)2C2O4、EdTA作为浸提剂结合曝气和TClP翻转实验对厦门西海域代表性拟疏浚物样品(X5站位)进行了重金属去除试验。结果表明,几种溶剂中,C2H2O4的效果最好;在相同溶剂条件下,对多数重金属元素,曝气处理可以有效地提高去除率。Total content and partition of heavy metals in the tentative dredged sediments of Xiamen western harbor were studied with the aim to development of conventional decontamination technology.The chemical extraction repair heavy metals polluted soil used the chemical medicament to exchange hydronium,dissolve(in acid or alkali) and complexation.The variety of content of heavy metals in Xiamen western harbor is not evident between dry season and rain season,content of heavy metals in dry season is comparatively higher.This experiment consider from economical,choose ammonium oxalate,oxalic acid and EDTA as the chemical medicament,combining aeration and TCLP upturning,carry though attempt on removing the heavy metals of X5 sample station of Xiamen western harbor.The results showed that the effect of oxalic acid is the best of several chemical medicaments.Using the same chemical medicament,remove the heavy metals much more effective with aeration for most heavy metals

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