ARCHIVED REPORTS_[REV] MAY & JULY 2014 RCSI

Home Browse Search

3-10 grinder will shred the material into pieces with a nominal diameter size of approximately 3 to 6 inches. After the material passes through the grinder, it is'Nill be dropped onto a conveyor that moves the material past a magnetic separator. A magnetic separator iswill be provided to extract nails and other ferrous contaminants from the material. The shredded waste iswi-U ae moved by the front end loader to the composting area or loaded into a dump truck that will transport the material to the composting area where it iS'Nill be combined with other 'Naste feedstock ~. The waste materials wi ll beare formed into compost piles which are~ approximately 15±G feet wide by 812 feet tall at centerfH.gR , approx i mate ly 18 f eet wide, and of varying length ~ (up to approximate ly 300 feet~ long). The active compost will be mixed, as required, for proper control depending on temperature and moisture profiles and season (turning will be kept to a minimum during the rainy season). The frequency of the Windrow turning and water addition will be determined by monitoring the pile temperature and moisture content. Temperatures within the active compost arewill be monitored daily using hand -held temperature probes. This information iswill be recorded and records are maintained at the facility. Moisture contentj§ will be monitored based on Imowledge of incoming moisture content, moisture addition, and by manual and laboratory testing. Piles arewill be watered and/or turned based on the results of monitoring. All operating standards defined by State composting regulations arewill be followed. As the materials (including water) in the active compost age, the volume of the compost decreases. Windrows will be combined with neighboring Windrows to maintain the desired pile dimensions. The final material wi ll be is screened according to market specifications. Screened material 'Nill be is stockpiled on the site prior to loadout to markets or for on-site uses. Oversized materials (overs) from the screening process will beis reground, sold, or landfilled. b. Quench or Process Water Describe wawr sypplies ,for proceS5 wawr reqt:Ji.fed and planned metRod of treatment and disposal olan}, wastewater (14 GGR, Section 18221(k). Deser/be tRe meilities water sup-fJlj ' and irrigation system that wi/I be used at tRe eompost piles, vessels, grinders, mixers, etc. Although this alternative is not currently used. +the water collected in the runoff sedimentation basinretention pond wi ll be ismay be used as process water to meet the desired moisture contents for composting. Water from the retention pondsedimentation basin maywH+ be applied to the waste, on an as needed basis and as available, as it leaves the tub grinder. A fixed nozzle will spray the water on the processed (ground ) feedstock material (e.g.! green and wood waste)ground waste at the discharge of the conveyor from the tub grinder. This process will eliminate the potential for pathogen regrowth in the active compost. The nozzle will not require contact with a human operator. If runoff water from the sedimentation pond is utilized. A'Q pump system will be required to move water from the sedimentation basinretention pond to the tub grinder area. The rate of application of water will be determined to provide the desired final mixture moisture content. It is antioipated that t he retention pond 'Nil I prov ide adequate process water supply . However, if neoessary,The primary source of process water at the RRF/Compost Facility ismay be obtained from other on-site sources. Water for facility operations is supplied by Forward Composting Facility swr Engineering Report of Compostlng Site Information -May 2014 z:\projects\allied waste \f orward V esource recovery facility\5 yr perm it rvw 2013-14V cs i 2014\text\se c 3 -revtr.doc