Biological Trickling Filter Deodorization Process Characteristics And Mathematical Model Study

The need to control and treat Odor pollution has become an urgent environmental and medical concern. Odor control often is more difficult than normal air pollution control. Biological technologies are cost effective and have no secondary pollution. Compared with the current control technologies (e.g. absorption, adsorption and incineration), biological technogies are in favor of treating Odor gases with low concentrations and high flux. The major air-phase biological reactors are biofilters, biotrickling filters, and bioscrubbers.There are many problems about Odor pollution of Wastewater Treatment Plants and pumping station. This dissertation studies the idiographic case about Wastewater Treatment Plants, reviews the characteristic about every deodorization technique, invents the efficiency complex deodorization technique with biofilm process, ensures technique parameter by experimentation.This dissertation studies Odor treatment for Publicly Owned Treatment Works, researches deodorization technique by Biofilm Processes. Granule Activated Carbon (GAC) is padding for this Biofilm Processes. The Odor composes ammonia gas, VOCs and H2S. The Odor consistency is more than 600,000. The ammonia gas consistency is 200ppm. VOCs consistency is 6.5ppm. The H2S consistency is 32ppm. The experimentation result indicates that Biofilm Processes treat mix gas well.The startup time of GAC Biofilm Processes is 6 day. For a long time, GAC Biofilm Processes wipes off ammonia gas with biologic effect. The temperature and the gas consistency affect treatment effects less. The wipe percent is more than 97% in winter with enough settle time. With in 3.7ppm VOCs, the wipe percent is more than 85% by controled logically in winter. With in 100ppm H2S, the average wipe percent is more than 97%. The highest wipe percent is more than 99% of H2S. GAC Biofilm Processes has adaptability about consistency fluctuating.For a long time running, GAC Biofilm Processes wipes off Odor very well. The exit Odor consistency could be down 30. GAC Biofilm Processes could adapt leave unused. The compressive stress down is up with gas filtration speed expediting. The compressive stress down is up with circulatory liquid entered. As gas filtration speed less 130m/h, circulatory liquid filtration speed 0.8 m/h, the compressive stress down is less than 600Pa/m.Biofilm model study is very lag for air pollution at present. Aimed to model multiple substrate removal in biofilm, The study accepted the theory of steady-state-biofilm kinetics and coupled substrate utilization kinetics to biofilm growth kinetic. This dissertation studies deodorization model and GAC wipe-percent model by the experiment.