硫化氢的强化分离及其对产酸脱硫生物反应系统的影响  

Idetified separation of sulfide hydrogen and its effect on an acidogenic sulfate-reducing reactor

作　　者：刘广民[1] 任南琪[1] 王旭[1] 王爱杰[1] 杜大仲[1] 陈鸣歧[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《环境污染治理技术与设备》2005年第2期16-19,共4页Techniques and Equipment for Environmental Pollution Control

基　　金：国家"863"高技术研究发展计划项目(2002AA601310);国家自然科学基金资助项目(50208006)

摘　　要：在完全混合式产酸脱硫生物系统中,利用负压抽提法强化H2S的气液分离,以NaOH溶液吸收H2S气体。抽提装置实现对H2S自动、连续抽提与吸收,在60mmH2O柱负压力范围分离出H2S的量与抽提压力呈线性正相关。抽提作用可促进SRB对碳源底物的转化,显著提高硫化物的气/液比例,增加系统中硫化物的转化率。抽提后硫化物的气/液比例(摩尔比)由0044上升到061、分离出的H2S在硫化物总生成量中的比例由42%增加到356%,硫化物转化率由平均494%提高至610%。抽提作用可以提高系统的硫酸盐去除率和酸碱缓冲能力,同时可以纯化和浓缩H2S。A negative pressure hydrogen sulfide extraction method is applied to a continuous stirred tank reactor (CSTR)——acidogenic sulfate-reducing reactor.Hydrogen sulfide produced in this system is separated through the way of being adsorbed by NaOH solution. The auto-controlled apparatus could automaticly extract and adsorb H_2S continuously. The experimental results showed that there is a linear correlation between the pressure and the amount of H_2S separated in the condition of 60 mm H_2O negative pressure. The functions of negative pressure extraction include accelerating the conversion rate of carbon substrate, increasing the proportion of hydrogen sulfide in gas-phase to that in liquid-phase, and increasing the conversion rate of hydrogen sulfide in the reactor as well. Comparing to non-extraction system, the proportion of hydrogen sulfide in gas-phase to that in liquid-phase increased from 0.044 to 0.61, the amount of H_2S produced increased from 4.2% to 35.6%, and sulfide conversion rate increased from 49.4% to 61.0%. Negative pressure extraction method could also increase sulfate removal rate, acid and alkalinity baffer capacity, and can purify and condense H_2S simultaneously.

关 键 词：抽提 转化率 后硫化 脱硫 摩尔比 分离 硫化物 完全混合式 去除率 SRB 

分 类 号：X703[环境科学与工程—环境工程] TQ330[化学工程—橡胶工业]