Agenda Item 9.4

Report No 94 / 18ts

TO: TECHNICAL SERVICES COMMITTEE

SUBJECT: RWMF GLASS CRUSHER EXHAUST FAN SYSTEM

AUTHOR: REINIER LAAN - MANAGER RWMF

EXECUTIVE SUMMARY

This report is to provide Council with costings for the purchase of an exhaust fan system for removal of nuisance dust at the glass crushing facility.

RECOMMENDATION

That Council approves the purchase of Option 3 - Exhaust Fan System

1. BACKGROUND

The glass crusher has been operational since 2011 and has crushed in total 316 tonnes in that time. The crushed glass product has been used in Council’s footpath program.

Employees have raised concerns regarding the nuisance dust that is present during operation.

In the 2017/2018 financial year, 40 tons of glass concrete was crushed. The adding of an exhaust fan system to the glass facility will allow the crusher to be used more efficiently.

1.1. EXHAUST DETAILS

The purpose of the exhaust fan is to remove glass dust via a fan system before it reaches the hopper system, which fills up with crushed glass.

1.2 LIFESPAN & REPLACEMENT

The lifespan of the exhaust system will be the same as that of the glass crusher facility, only maintenance of the electrical fan motors is required in this time.

1.3. SUMMARY OF EXAUST FAN SYSTEM COMPARISON

In 2017 Technical Services (Infrastructure) investigated dust extraction systems and requested quotes to design, build and implement a dust extraction system.

Option 1 ($349,000.00) is a high end industrial solutions with high percent efficiency.

Option 2 ($304,000.00) is a high end industrial solutions with high percent efficiency.

Option 3 ($40,000.00) was requested as the glass facility shed still remains an open structure, therefore dust from the environment cannot be fully excluded.

Report No. 94 / 18ts Agenda Item 9.4 Page ..../2

Table 2: Cost comparison of Exhaust fan systems

MODEL COST

Option 1 Dust Extraction System Model DBS Cx4-96 $349,060.80

Option 2 Dust Extraction System Model CX4-64 $304,440.40

Option 3 Basic Exhaust Fan System + Concrete Slab $40,000.00

2. DISCUSSION

In 2018 the glass crushing operation was re-evaluated due to dust safety concerns raised by staff and exposure to silica dust (nuisance glass). Technical Services engaged a contractor to investigate the design of a glass crusher exhaust system to improve the dust release situation.

The glass crushing process at the RWMF was put on hold in 2017 due to the unsafe work environment created by the excessive dust at the the glass facility. A local contractor was requested to quote for an fan/exhaust system.

The cost for option 1 ($349,060.80) and 2 ($304,440.40) are high-end industrial solutions more suitable for factories. This cost was analysed and deemed too be high for the low value end-product (e.g crushed glass). The cost of the options (1&2) is related to the percentage efficiency required and design aspects. The general rule is that the higher the efficiency the higher the cost of the dust extraction system.

Option 3 ($40,000.00) provides value for money and would include the storage of wine/glass containers on top of a concrete surface to reduce soil contamination to the product from the start. This design is more appropiate as the facility is an open shed and will not exlude dust from the physical environment in any event.

It is recommended that Option 3 be accepted by Council.

EXPECTED OUTCOMES• Increased machine and staff operating safety and efficiency• Improved air quality at the glass crusher• Supports the achievement of the ASTC's Strategy’s Plan core indicator to use 25% of

the wine and spirit bottles provided under the Cash for Containers scheme annually.

3. POLICY IMPACTS

Alice Springs Town Council Strategic Plan 2018 to 2021

Objective 3: Leadership in sustainability3.3: Conserve and protect the Alice Springs environment

3.3.2: Maintain and ensure efficient use of the Regional Waste Management Facility

4. FINANCIAL IMPACTS

The budget of $40,000.00 is available from the operational budget (176.25.241).

Report No. 94 / 18ts Agenda Item 9.4 Page ....13

5. SOCIAL IMPACTS

The exhaust fan system will provide a safer workplace for ASTC Employees

6. ENVIRONMENTAL IMPACTS

The exhaust fan system will reduce nuisance dust within the glass crusher facility

7. PUBLIC RELATIONS

Reduction of nuisance dust for Council Employees

8. ATTACHMENTS

Attachment A: Design of Exhaust Fan System

Reinier LaanMANAGER REGIONAL WASTE MANAGEMENT FACILITY

Scott AllenDIRECTOR TECHNICAL SERVICES

INLINE DUST EXTRACTION FAN

TO REDUCE CONTAMINATION THROUGHPUT

ALICE SPRINGS TOWN COUNCILCNR TODD STREET AND GREGORY TERRACE PHONE: (08) 89 500 500 FAX: (08)89 530553

ATTACHMENT A

RWMF GLASS CRUSHER DUST EXTRACTION AND STORAGE

DRAWING NUMBER: GC01

DESIGNED: M BEATON

SURVEYED: N/A

DRAWN: M RAYMOND

AMENDMENT:

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