District of Sechelt Preliminary Report
District of Sechelt Preliminary Report
District of Sechelt Preliminary Report
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<strong>District</strong> <strong>of</strong> <strong>Sechelt</strong><br />
Bio-Solids Treatment Pre-Design <strong>Report</strong><br />
1.0 INTRODUCTION<br />
1.1 Subject and Purpose<br />
This study presents an investigation and comparison <strong>of</strong> options for treating sewage treatment plant<br />
residuals from the existing <strong>District</strong> <strong>of</strong> <strong>Sechelt</strong> plants. Sewage treatment plant residuals are commonly<br />
referred to as sludge or biosolids.<br />
The purpose <strong>of</strong> the report is to enable selection <strong>of</strong> the best process for dealing with biosolids and<br />
producing a product which can be reclaimed in accordance with the B.C. Organic Matter Recycling<br />
Regulation (OMRR).<br />
1.2 Scope<br />
This report will deal with the biosolids products from the two existing sewage treatment plants and the<br />
trucked waste from the region, currently received at the Dusty Road treatment plant.. A previous report<br />
provides a comparison <strong>of</strong> a variety <strong>of</strong> sewage treatment technologies which could be used in the future<br />
construction <strong>of</strong> a single central sewage treatment plant.<br />
This report will deal with options for conveyance <strong>of</strong> biosolids to the new site and the options available for<br />
processing the biosolids. The end-use considerations are explored in a separate document entitled<br />
“Biosolids Management Plan”. The Biosolids Management Plan examines options for use <strong>of</strong> processed<br />
biosolids such as agricultural uses, tree planting and site reclamation, landfill cover material and soil<br />
amendment products.<br />
1.3 Methodology<br />
The study initially examines the routes and options for diverting biosolids from the two existing plants to<br />
the new site. This is documented in Technical Memorandum No.1 appended to this report.<br />
This report develops the quantities <strong>of</strong> biosolids generated, both currently and in the future. It compares<br />
applicable technologies available for stabilization, dewatering and drying. This is followed by a discussion<br />
<strong>of</strong> the potential destination <strong>of</strong> the variety <strong>of</strong> potential products derived from biosolids processing,<br />
including local opportunities such as tree planting for the gravel mining reclamation programs.<br />
Page 1<br />
1592.0026.01 / December, 2010<br />
U:\Projects_KEL\1592\0026\01\R-<strong>Report</strong>s-Studies-Documents\Draft\2010-11-REP-BiosolidsProcessing Options Comparison Pre-Design Study (rev3).doc
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