A Retrospective Analysis of Suspended Solids Deposition in Onondaga Lake , Ny : 1980 - 2008

  • Matthews DA, Whitlock AL
  • Published 2010

Abstract

An Ecological Treatment System with vermifilters (VETS) was used to reuse bio-digested food waste. Bio-digested food waste had typically been treated with conventional aerated processes, but the capacity of ecological treatment systems to reuse food waste has never been studied. Experiments were conducted at three different inflow rates, with hydraulic retention time of 114.5d, 28.6d and 14.3d. Samples of influents and effluents from each treatment unit were tested for NH4-N, NO3-N, carbonaceous biochemical oxygen demands (CBOD5), and orthophosphate. During the entire study, all variables were significantly reduced except for NO3-N, which displayed large increase in the system. With the increase of inflow rate, NH4-N, NO3-N and orthophosphate concentration in effluent was also increased, but suspended solids and CBOD5 did not vary among different inflow strengths. Design graphs were developed to facilitate the future design process of ecological treatment systems. Vermifiltration was used as the first unit in the system, which showed high efficiency in NH4-N and CBOD5 reduction. Algae growing experiments were conducted, and VETS effluent showed significant support for Chlorella spp. culturing. Quick measureable variables such as oxidization-reduction potential (ORP) and pH were tested and compared to water quality variables, and ORP was recommended as a sensitive indicator for system treatment capacity.

Cite this paper

@inproceedings{DA2010ARA, title={A Retrospective Analysis of Suspended Solids Deposition in Onondaga Lake , Ny : 1980 - 2008}, author={Matthews DA and Whitlock AL}, year={2010} }