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A Self Sustaining Fully Integrated Sewage Treatment Plant
All sewage treatment plants (STP) in the world require the operation costs to sustain their performance. Most of the governments are able to pay for the initial capital costs but find it difficult to maintain the high operation cost of the STP
The operation cost of any STP will normally include the electrical power consumption, the labour and management cost, the chemical consumption, the spare parts replacement cost and the sludge disposal cost. The electrical power consumption and the sludge disposal costs make up the major expenses of the operation cost. The operation cost varies according to the types and locations of STP.
Pollution Engineerings (M) Sdn. Bhd. (PESB) had developed a profit making large scale fully integrated STP system, called “HiWaveTM STP”. Instead of spending money to operate the STP, the HiWaveTM STP actually helps the operator to make profit! It is a real breakthrough!
WHAT IS HIWAVE STP?
The HiWave-STP consists of the following 3 major component technologies:-
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The Standard STP.
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The STP can be any standard types, such as Conventional Activated Sludge system(CAAS), Extended Aeration Activated Sludge system, Sequential Batch Reactor system(SBR), Oxidation Ditch system, High Rate Trickling Filter system (HRTF), Rotating Biological Contactor system (RBC).
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A Typical Trickling Filter Solid Contact Sewage Treatment Plant
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In fact, the system that produces more sludge is preferred for the HiWaveTM STP. Thus, the CAAS, the SBR, the HFTF and the RBC are the preferred systems. The primary and the secondary sludge from the STP can be used to produce biogas and electricity.
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A Typical Activated Sludge Treatment Plant
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The Biogas/Cogen System
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The biogas/cogen system is quite a standard system already in used by many large scales STP, to produce electricity to supplement the electrical power consumption of the STP. The primary and secondary sludge generated from the STP are fed directly to the anaerobic digesters to produce biogas, which in turn is fed to the gas engine or turbine to generate electricity.
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Typical Anaerobic Digester
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However, the electricity produced from the sludge alone is insufficient to power the whole STP. In order to generate sufficient electricity to power the whole STP and the other component technologies, the STP owner must allow importing food waste and other biomass from the city.
The quantum of imported biomass is determined by the total power consumption of the whole integrated STP system. The HiWaveTM STP does not require outside electricity supply.
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Typical Biogas Engine
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The HiWaveTM Compo System
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The HiWaveTM Compo system is a new technology, developed and patented by PESB, which can convert the sludge from the anaerobic digesters and other biomass into dry granular organic fertilizer, within 7 days. It is a continuos process. The HiWaveTM Compo system uses the Aerobic Thermophilic Fermentation (ATF) Process, which is different from the conventional composting process.
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Typical HiWaveTM Compo Machine
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The HiWaveTM Compo system has a built in NPK blending system that can produce organic based fertilizer with different NPK values suitable for different agriculture purposes. The specially blended fertilizer is more effective for plant growth and thus can fetch a higher market price.
The sales of the high quality dry organic based fertilizer combined with the self generating electric power will make the operation of the HiWaveTM STP not only sustainable but profitable!
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Dried Granular Organic Fertilizer
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Process Flow Chart
Valuable Output
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