Total amount of urban waste water treatment plant site verification of emission reduction - urban sewage treatment plants, emissions - water

Total amount of urban waste water treatment plant site verification of emission reduction - urban sewage treatment plants, emissions - water

Town Sewage COD emission reduction accounting treatment plant main parameters involved in day treatment capacity, wastewater treatment plant operating days, into the effluent COD concentration. These parameters should be verified by on-site water, water quality verification and verification of three aspects of operating conditions to confirm. Verification, including water water water water water verification and verification; quality inspection, including water quality and water quality verification inspection; Operation of verification, including verification of activated sludge, dissolved oxygen verification, verification of air to water ratio, oxidation reduction potential verification, power consumption verification, etc.. Verification points are as follows:

1, the verification of water Verification including water water water water water, and verification. State "total emissions of major pollutants accounting rules (for Trial Implementation)" (hereinafter "Rules"), the COD of the sewage treatment plant does not require the use of emission reduction accounting or water water water water, but suggested by the actual accounting effluent water is calculated. In addition to focus on verification of the water quantity, but also water quantity should be verified (the purpose of verification of the influent water, effluent water, one of the checked, the second is the existence of such abnormal situations beyond the waste-water treatment determined).

(A) verification of the influent water

1. Charles Tai Zhang (1) check the design documents Urban sewage treatment plant has its specific design influent water. Typically, sewage treatment plant influent water should not exceed the actual maximum design inlet volume (design size multiplied by the coefficient of variation K, generally take 1.1 to 1.3 K; such as the design scale of 30,000 tons / day, the design change coefficient K 1.2, the actual inflow of water is usually not more than 36,000 tons / day), if the scale into the design of water, even more than the maximum long-term design of water quantity, then the data is likely untrue.

(2) check acceptance materials Acceptance of materials, including sewage treatment plant inspection of materials and sewage collection pipe network acceptance of material in two parts. Acceptance of sewage treatment plant material should focus on access to water quantity, water composition (ie, industrial waste water sewer and percentage of cases) and so on. Pipeline inspection materials should focus on verification, length, area received water service population ("Rules" provides that in accordance with the service when the population per capita discharge of sewage water to take 80 liters / day to 180 liters / day, as all regions of this factor there is a gap, so on-site inspections should be according to local conditions access) and upgrading Pump Station.

2. Check meter Flow meter including instantaneous flow rate and accumulated flow measurement. First, when the verification flow according to the instantaneous flow meter display, while in the control room access to the historical curve of water, water, control the recent changes of water a day into the estimated date into the water; 2 is based on the cumulative flow meter shows the time calculated by dividing the corresponding the average daily water volume. Verification of water flow with the accumulated water in the control room flooded with water, checked the historical curve.

3. Check overflow beyond the control Most of the sewage treatment plant set

there beyond control, beyond the control position according to further verification to confirm the influent water. Some in the water beyond the control settings set to upgrade the pump wells, some in the distribution of wells before the biochemical pool of individual sewage treatment plants in these two locations are set up beyond the tube. If flow meter is located beyond the tube before and beyond the control Valve Door open, accounting deducted when part of the water overflow; such as flow meter located beyond the tube, then is the actual water meter readings of water.

4. Zha other double counting of water

Individual sewage treatment plant influent water to increase the portion of the treated wastewater through the pipeline to re-enter the water meter before the double counting of feed water (this should focus on verification, especially for the water to the influent COD reduction as a row of accounting based on the sewage treatment plant). In addition, sewage sludge filter press wastewater treatment plant will re-enter the sewage treatment system, part of the sewage treatment plant in this part of the waste water through the water meter re-included water (the small number of the current verification accounting have not subtract the time, However, when considering the water balance, should be included in this calculation).

5. Investigations related equipment in the control room run record

(1) check pump run time and pump flow, pump flow with the running time is calculated by multiplying the water volume. (2) search level collection wells, water pumps to enhance current and head, and the curve of control and into the water, determine the water volume record is accurate. First, the control

verification methods to enhance the pump current curve and into the water curve, two curves should be synchronized with the changes that increase or decrease at the same time (with frequency control for the upgrading of the pump, then compare their operating frequency and inflow whether synchronous with the changes). Second, the control set of wells, water level on the upgrade pump head curve, the instantaneous flow logic of the trend curve, projections of pump. General rule is a well level, thereby boosting the pump head reduction, flow increases. If set up well in the clear liquid, but no significant change in the amount of water may be inferred beyond the waste-water treatment; when the lower level set well, the lift pump increases the actual head and flow reduction. Can check the opening scene a few pumps, flow is how much (the pump flow to total flow divided by the number of pumps operating it), then access to historical data, control traffic and equipment operation to Taiwan to check.

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