Treatment Industries. Wagga Wagga New South Wales 2650

Transcription

1 Treatment Industries Wagga Wagga New South Wales 2650

2 Water Forever Treatment Industries A Division Of Neylan Water Pty. Ltd. Forever EVERHARD Ei I N D U S T R I E S

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4 Everhard Industries Awareness Training Session Wastewater Basics Aqua-nova Systems Aqua-Nova Treatment Process Aqua-nova Installation Aqua-nova Maintenance

5 Everhard Industries Aqua-nova Providing Australians with the technology to safely treat their wastewater for re-use in their businesses, homes and gardens.

6 Wastewater Basics Wastewater contains many contaminants that can be defined in many ways - Solids / Liquids Organic / Inorganic Biodegradable / Non-Biodegradable

7 Wastewater Basics Wastewater is typically >99% water with very low amounts of solids. These solids are usually organic and biodegradable. The soluble contaminants are made up of salts (sodium, magnesium, calcium, chloride, sulfate, etc) and organics (sugar, urea, etc).

8 Wastewater Basics When raw wastewater is analysed, we typically ask the following analysis - 5-day Biochemical Oxygen Demand This is the oxygen that would be removed from the environment after 5 days from the biological degradation of organics. T.S.S - Total Suspended Solids Solid material that do not pass through a 0.45um filter. TN* - Total Nitrogen All nitrogen : organic nitrogen, ammonia, nitrate & nitrite. TP* - Total Phosphorous Organic Phosphorous & Phosphate * - Nutrients

9 Wastewater Basics When treated wastewater is analysed,we typically ask the following analysis + T.S.S + TN + TP + Thermotolerant Coliforms These bacteria will not necessarily kill you or make you sick. They are bacteria that indicate the pathenogenic bacteria could be present. Vibrio Cholerae - Cholera Salmonella Typhi - Typhoid Shigella - Dysentery

10 Wastewater Basics Raw Secondary Advanced Tertiary Treated Secondary <20 <10 <5 TSS <30 <10 <5 TN <30 <20 <5 TP 8-10 <10 <10 <2 T.Coliforms NA <10* <10 <10

11 Wastewater Basics Treatment Systems Aerobic Fast metabolism. High concentrations of D. O. (>2mg/L). Higher energy demand.

12 Wastewater Basics Treatment Systems Anaerobic Slow metabolism. D. O. = 0mg/L Low energy demand.

13 Wastewater Basics Treatment Systems Anoxic Slow metabolism. D. O. = <0.2mg/L + Nitrate Low energy demand.

14 Wastewater Basics Why do we treat wastewater? Health Industry / Environment

15 Wastewater Basics Health Wastewater contains a wonderful array of deadly bacteria that, until the modern era, killed thousands of people. Initially wastewater was simply diverted into the local river however this simply moved the problem. sometimes!!! What is the error in this statement?

16 Wastewater Basics Health While the use of wastewater lagoons aided the reduction of pathogens in the water, it was not until the use of chlorination did a serious reduction in water-borne diseases occur.

17 Wastewater Basics Industry / Environment The main problem associated with the discharge of wastewater into aquatic environments is the massive reduction of oxygen that occurs in the water. Aerobic bacteria in the water consume W oxygen when breaking down organic material. This process can result in little or no dissolved oxygen remaining in the water, killing the ecosystem.

18 Wastewater Basics 8mg/L S E W A G E River Flow 0mg/L

19 Wastewater Basics Industry / Environment More recently the management of nutrients in treated sewage would be of concern due to algae blooms in aquatic environments.

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21 The System

22 The System The Aqua-nova Aerated Wastewater Treatment Plant is made using two 3000L tanks. These tanks can be made of either concrete or polymer providing flexibility within the market. Both materials are resistant to environmental deterioration.

23 The System The Aqua-nova Aerated Wastewater Treatment Plant is approved for use in all states. Unfortunately the application for use is different in most states Queensland - 10EP NSW - 10EP Victoria - 10EP South Australia- 6EP

24 The Primary Tank is literally an empty tank while the second tank is fitted with media and chambers to provide areas of treatment. The System

25 The polymer system is very light. The system can be nested allowing it to be shipped on one pallet and can be installed by hand. The System

26 Polymer systems must be fitted with anchors preventing them from moving if groundwater rises. Two anchors are provided with a standard system however four must be used in areas affected by high groundwater. The System

27 The System Concrete systems are generally sold in South East Queensland only. As these systems are heavier than the polymer system they must be installed using appropriate lifting equipment. Distributors overcome this problem by having the system delivered by our crane truck and having the system lowered directly into the excavated hole. The these systems do not require anchors.

28 Variations on the System The standard depth for the inlet of both systems is approximately 400mm. In flat areas this often is insufficient to get the required drop for the drainage from the house. In these areas we can fit either a 300mm or 450mm riser onto the system.

29 We manufacture and sell wastewater treatment systems!!

30 2 x 3000L Tanks Four Processes Sedimentation/Anaerobic Digestion Aerobic Digestion Sedimentation Disinfection

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32 Primary Tank Removes solids and oils Breaks down organic solids Provides nutrients to. Aerobic system during. zero flow conditions Dilutes high concentrations. of wastewater contaminants

33 Primary Tank Design Features All systems have a T inlet. This directs raw wastewater entering the system down, preventing water flowing directly to the outlet.

34 Primary Tank Design Features All systems have a T outlet preventing scum that has collected on the surface of the system from being discharged into the aeration tank.

35 Primary Tank Design Features Systems sold outside of Qld have a partition wall. This wall limits the amount of sludge and scum near the exit of the tank.

36 Primary Tank Lowers by 30% Lowers T.S.S. by 60%

37 Oils Float Primary Tank Separation of Solids / Oils Separation efficiency is based on the size & density of a particle. Solids Settle Larger and more dense the particle the quicker it will sink.

38 Primary Tank Separation of Solids / Oils This separation process can be disrupted by high flows limiting separation and possibly re-suspending settled solids.

39 Primary Tank Anaerobic Digestion 99.9% of anaerobic digestion occurs in the settled sludge as it is the only place where bacteria can have good contact with organic material.

40 Hydrolysis Acetogenic Bacteria Methanogenic Bacteria [CHONS] SUGARS + AMINES ORGANIC ACIDS CH 4, CO 2, H 2, H 2 S, NH 3 Primary Tank Anaerobic Digestion The process is indirect an required several types of bacteria working together to happen effectively. These bacteria work best at 35 0 C.

41 Solids mix with oil to form scum Primary Tank Anaerobic Digestion Solids attached to Bubbles Bubbles form in the settled solids. As they break out of the sludge they drag out some solids. When the bubble reaches the surface, gases are released while solids mix oils to form the scum layer.

42 Primary Tank Anaerobic Digestion The formation of the scum layer is critical to the management of odours as hydrogen sulfide and other odour causing compounds are oxidised in this mass.

43 O 2 O 2 CH 4, CO 2, H 2, NH 3 2 H 2 S + O 2 = 2 S + 2 H 2 O (H 2 SO 4 ) CH 4, CO 2, H 2, H 2 S, NH 3

44 Primary Tank Solids attached to Bubbles VFA's & Soluble Organics Anaerobic Digestion The re-suspension and breakdown of the solids allows for a continuous stream of nutrients to be fed into the aerobic process during zero flow periods.

45 Primary Tank Dilution of Elevated Loads All systems are effected by influxes of wastewater that has elevated concentrations of contaminants.

46 Primary Tank Dilution of Elevated Loads The water in the primary tank, along with the water from the sludge return immediately dilutes this effluent.

47 Primary Tank Dilution of Elevated Loads As this effluent moves through the system it is further diluted.

48 Primary Tank Dilution of Elevated Loads By the time the effluent exits the primary tank it is almost completely dispersed and its effect on the aerobic process is negligible.

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50 Secondary Tank Aerobically digests organic matter. Clarifies and disinfects

51 Aeration Legs Aerobic Zone Fixed Film Media

52 Air-Lift Pump Clarifier

53 High Level Float Alarm Pump (not visible) Discharge to Irrigation Area Disinfection Pumpwell Chlorine Contact Tube

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60 Aerobic Digestion Breaks down organic material. into Carbon Dioxide, Water. and Ammonia. Converts Ammonia to Nitrate

61 Aerobic Digestion Design Features 100mm Corregated Pipe. (97 x 1m ) Three Aeration Legs. LA80A Blower (100L/min)

62 Aerobic Digestion Design Features Aerators are located below the. media providing efficient. Oxygen Transfer. Rising air bubbles generate. mixing currents that limit the. settling of solids and allow. contaminants to be brought in. contact with biofilm.

63 Aerobic Digestion Fixed Film Aerobic Systems Aerobic bacteria attach to and multiply on submerged plastic media and develop a thick porous biofilm. Bacteria adsorb/digest soluble in clarified sewage.

64 MEDIA Aqua-nova Aerobic Digestion Fixed Film Aerobic Systems Carbon Dioxide Water Nitrate Bacteria + Organics + O 2 = More Bacteria + CO 2 + H 2 0 Organics Ammonia Oxygen

65 MEDIA MEDIA MEDIA Aqua-nova Aerobic Digestion Fixed Film Aerobic Systems Bacteria continuously shed from biofilm in erosion and sloughing processes. - Dead Biomass FORCE FORCE Sloughing is a result of the death of bacteria due to a lack of oxygen, and produces large, dense bacterial masses. Detached Biomass FORCE

66 MEDIA MEDIA MEDIA Aqua-nova Aerobic Digestion Fixed Film Aerobic Systems Bacteria that are dislodged from the media may re-attach to the media or are swept into the clarifier. - Dead Biomass FORCE FORCE FORCE Detached Biomass

67 Aerobic Digestion Fixed Film Aerobic Systems Aerobically digested water should be relatively clear with visible clumps of bacteria that settle quickly.

68 Final Clarification Simple process where the solids settle to the bottom of the clarifier due to their higher density. As with the Primary Tank this process is disrupted by elevated flow rates.

69 Final Clarification Settled solids are pumped back to the Primary Tank using an airlift pump. Setting the flow rate of the airlift pump is critical to the operation of the system.

70 Final Clarification If it is set too high, too much air is diverted away from the aerobic digestion. This inhibits the degradation of resulting in poor quality effluent being produced.

71 Final Clarification If it is too low, solids can accumulate at the bottom of the clarifier. If the water is heavily nitrified this can result in nitrogen gas being generated which can float the settled solids to the top of the clarifier.

72 Final Clarification At the bottom of the clarifier we have..

73 Final Clarification. Solids (Bacteria)..

74 Final Clarification..

75 Final Clarification DO DO DO DO.. Dissolved Oxygen. DO DO DO DO DO

76 Final NO 3 - NO 3 - Clarification DO DO DO DO NO 3 -..Nitrate.. NO 3 - NO 3 - NO 3 - DO DO DO DO NO 3 - NO 3 - NO 3 - DO

77 Final NO 3 - NO 3 - Clarification DO DO DO DO NO 3 - What happens if this water is allowed to sit for an extended period of time??? NO 3 - NO 3 - DO NO 3 - DO DO DO NO 3 - NO 3 - NO 3 - DO

78 Final NO 3 - NO 3 - Clarification DO DO DO DO NO 3 - Bacteria consume BOD and Dissolved Oxygen. NO 3 - NO 3 - NO 3 - DO DO But then what happens?!?!?!? DO DO NO 3 - NO 3 - NO 3 - DO

79 Final NO 3 - NO 3 - Clarification NO 3 - This area is now ANOXIC and bacteria use nitrate to oxidise BOD!!! NO 3 - NO 3 - NO 3 - NO 3 - NO 3 - NO 3 -

80 Final Clarification N 2 Producing bubbles of Nitrogen that float the solids to the top of the clarifier!!! N 2 N 2 N 2 N 2 N 2 N 2 N 2 N 2

81 Disinfection Disinfection is the most important part of the process. While the removal of and TSS provide water with a wonderful aesthetic quality, unless the water is disinfected the water may contain elevated amounts of pathogens and would still impose a high health risk.

82 Disinfection Chlorination is used to disinfect the clarified water. Clarified water flows over chlorine tablets dissolving chlorine and killing bacteria. Chlorine Res.= mg/L

83 Disinfection Chlorination is used to disinfect the clarified water. This is the most effective form of disinfection available. Chlorination will still perform to its optimum even if the water is not clear. DON T BELIEVE THE PROPAGANDA!!!!

84 Disinfection 1. We shouldn t use chlorine. because it is a dangerous. chemical!! The chlorine tablets that we use is a strong oxidising agent that quickly and effective kills bacteria, even in dirty water.

85 Disinfection 2. We shouldn t use chlorine. because the chlorine will. kill my plants!! Town water contains chlorine at similar concentrations as that effluent produced by Aqua-novas.

86 Disinfection Quotable Quote by Chris Pipe-Martin Chemist Caboolture S. C. I have seen water that would bleach clothes used to irrigate plants and have no effect on their health.

87 Alarms The system is fitted with two alarm systems that activate an audio and visible alarm which is fitted in the house or at the treatment system when it is installed.

88 Alarms A pressure switch is connected to the aeration system that can detect a loss in pressure. This indicates a blower failure.

89 Alarms A float switch is installed in the pump out well which is activated if there is a pump failure.

90 Nearly all systems are manufactured at Prosperity Place. The systems are made in a production line. Rockets, the internal section of the Secondary Tank, are made as part of this process. Manufacture

91 Manufacture For polymer systems rockets are fitted immediately into a 3000L tank. Concrete assemble is performed at Geebung, Sunshine Coast, and Springwood.

92 Sales Darwin Fiji Brisbane Perth Nearly all systems are sold directly to our distributors located across Australia. Adelaide Sydney Melbourne

93 We prefer to sell through distributors because : 1. Our distributors know how to install Aqua-novas. 2. Our distributors will service Aqua-novas. 3. Our distributors know all the local rules.

94 Sales Some of our competitors will sell a system to anyone. This has resulted in poor installations that will not be covered by the manufacturer s warranty and often results in the owner having no one willing to maintain the system. All systems require a qualified person to perform routine maintenance on the system over the first 12-months. This rarely occurs if a system is not installed my a distributor.

95 Installation

96 Installation Part 1 Development Application When a new building is constructed or the plans amended of for wastewater treatment the owner must submit an application to council stating what system is to be used and where it and the irrigation area will be located on the property. Councils have guidelines for setback distances that must be applied. These are the minimum distances for buildings, boundaries etc. Unfortunately councils are often inconsistent with their application which can frustrate many distributors.

97 Installation Part 2 Site Preparation A hole, 2.2m wide, 4.3m long and 1.9m deep, must be dug at the location stated on the approved application. A larger hole may need to be dug in areas where soil is sandy. This should be done immediately before the installation of the system to limit the possibility of site accidents and the collapse of the hole. Approximately 50cm of 3mm gravel must then be spread over the base of the hole. This is provide a smooth surface and reduce the possibility of a hole developing in polymer systems. The hole must then be leveled.

98 Part 2 Installation The system can then be lowered into the hole and fitted out. When completed the system must be immediately filled with water to ensure that the system does not lift out of the ground. Installation

99 Part 2 Installation A plumber must connect the plumbing to the Aqua-nova. An electrician must connect power and fit the alarm. Finally the hole must be backfilled. Installation

100 Installation Part 3 Commissioning As the property remains vacant for until construction is completed on the site the system is often commissioned several weeks after the system is installed. We recommend that the blower and pump is prevent theft. During commissioning chlorine tablets are added and alarms are checked.

101 Maintenance As part of the sales price our distributors include the cost of performing maintenance over the first year of operation. This includes servicing the system every three months and maintaining the system s warranty.

102 Maintenance Servicing Checking water quality (Clarity, ph, Chlorine Residual). Replenish Chlorine Sticks Clean out Clarifier Monitor Sludge Accumulation Servicing Aerator Checking Alarms. Checking irrigation area.

103 Commercial Systems

104 Commercial Systems Constructed for resorts, factories and industry for 2,500L+/day. These systems are designed using similar principles as the Aqua-nova..

105 Commercial Systems JUST BIGGER

106 Commercial Systems Aeration, tank sizes and clarifiers are sized using wastewater engineering formulae, providing an accountable system for environmental evaluations.

107 Commercial Systems

108 Commercial Systems Commercial Systems contribute approx. 5% of our National Sales. These systems typically have a higher cost than the smaller systems and are engineered from the ground up.

109 Thank you!!

110 Treatment Industries Wagga Wagga New South Wales 2650