Elkhart Environmental Processing Corp

Transcription

1 Tom Ferrero Elkhart Environmental Processing Corp

2 Overview o Why Odor Control? o Available Techniques o Biofilter Construction

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6 Safety o Corrosion Hydrogen Sulfide o Explosion Methane o Health Air borne disease

7 Odor Control Strategy o Iden?fy Sources of Odors Septage Receiving Area Screening and Grit Removal Equaliza?on Tanks Processing Dewatering Filtrate o Es?mate Degree of Control Required based on proximity of downwind receptors o Evaluate Op?ons o Select Appropriate Strategy o Design and Construct

8 Odor Control Strategy o Best Management Prac?ces Use quick-disconnect fiongs Avoid Free Fall of septage Provide washdown facili?es for spills Ven?late tanks to odor control system Everything inside!

9 Odor Control Strategy o Best Management Prac?ces

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11 Odor Control Strategy o Best Management Prac?ces

12 Odor Control Strategy o Best Management Prac?ces

13 Odor Control Strategy o Best Management Prac?ces

14 Odor Control Strategy o Best Management Prac?ces

15 Available Techniques o Remote Site o Odor counteractants (Mis?ng) o Wet Scrubber o Ac?vated Carbon o Biofilter

16 Available Techniques o Remote Site

17 Available Techniques o Mis?ng (odor counteractants) Sprayed into the atmosphere React with odorous compounds Encapsulate odorous compounds Substan?al cost of chemicals 30 to 40% reduc?on of odors

18 Available Techniques o Odor Counteractants

19 Available Techniques o Wet Scrubber

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21 Available Techniques o Ac?vated Carbon Absorber

22 Available Techniques o Ac?vated Carbon Absorber

23 Available Techniques o Biofilters - Passing odorous air through a media containing microbial populations - Microbes use the odorous compounds as a food source - Media must be kept moist and air must have good paths through media - Requires long contact times and low velocities - Systems come in a variety of designs and media configurations

24 Available Techniques o Biofilters

25 Technique Cost Factors Advantages Disadvantages Wet Scrubber Activated Carbon Absorber Biofilters Odor Counteractants Moderate Capital and operating costs Cost depends on frequency of carbon use Low capital and O&M costs Cost dependent upon chemical usage Effective and Reliable Simple, few moving parts, effective Simple, minimum O&M Low Capital cost High Chemical Use, and spent chemical to dispose Only applicable for dilute streams Design criteria not well established, large land area Limited odor removal efficiency

26 Biofilter Construction

27 Biofilter Construction

28 Biofilter Construction

29 Typical Design Criteria for Biofilters Parameter Hydraulic Loading Detention Time Media Depth 2-10 cfm/sq ft seconds 3-5 ft Media ph 6-8 Pore Volume 40-50% Moisture Content 50-60% Media Constitutents Humidity of inlet air % Value Bark Mulch, hardwood chips, biosolids or leaf compost Recommend air changes 6 volume changes/hour

30 Typical Design Criteria for Biofilters Parameter Hydraulic Loading Detention Time Media Depth 2-10 cfm/sq ft seconds 3-5 ft Media ph 6-8 Pore Volume 40-50% Moisture Content 50-60% Media Constitutents Humidity of inlet air % Value cfm / 2500 sf Bark Mulch, hardwood chips, biosolids or leaf compost Recommend air changes 6 volume changes/hour

31 Typical Design Criteria for Biofilters Parameter Hydraulic Loading Detention Time Media Depth 2-10 cfm/sq ft seconds 3-5 ft Media ph 6-8 Pore Volume 40-50% Moisture Content 50-60% Media Constitutents Humidity of inlet air % Value 6 cfm / sq ft Bark Mulch, hardwood chips, biosolids or leaf compost Recommend air changes 6 volume changes/hour

32 Typical Design Criteria for Biofilters Parameter Hydraulic Loading Detention Time Media Depth 2-10 cfm/sq ft seconds 3-5 ft Media ph 6-8 Pore Volume 40-50% Moisture Content 50-60% Media Constitutents Humidity of inlet air % Value 6 cfm / sq ft 4 ft Bark Mulch, hardwood chips, biosolids or leaf compost Recommend air changes 6 volume changes/hour

33 Typical Design Criteria for Biofilters Parameter Hydraulic Loading Detention Time Media Depth 2-10 cfm/sq ft seconds 3-5 ft Media ph 6-8 Pore Volume 40-50% Moisture Content 50-60% Media Constitutents Humidity of inlet air % Value 6 cfm / sq ft 40 seconds 4 ft Bark Mulch, hardwood chips, biosolids or leaf compost Recommend air changes 6 volume changes/hour

34 Questions? Tom Ferrero Elkhart Environmental Processing Corp (267)