| Non accepted measured parameter | CH4 < 35% | ||
| Checked Values | Diagnosis | Recommended Actions | |
| Same recorded values of CH4, O2 and suction pressure for both well and manifold | There is none problem with the LFG horizontal network. The problem is identified on LFG well | ● STEP 1: Measurement of the leachate level at the LFG Well and check if the level is high (<15 m). ● STEP 2: Isolation of the well from the LFG system in the case of high leachate level ● STEP 3: Extract the leachate through a portable pump. The pumped leachate is transported to the wastewater treatment plant by a tanker truck. ● STEP 4: This procedure of above step should be repeated until the successful leachate level drop ● STEP 5: Measure the leachate level from the isolated well after three days ● STEP 6: If the leachate level is accepted, the isolated well is connected again to the LFG system (through the valve at the manifold). We repeat the level measure after three days ● STEP 7a: if the CH4 is lower than 35% and leachate level is rising up again (<15 m) then we repeat the above-mentioned steps as many times as required ● STEP 7b: if the CH4 is lower than 35% and leachate level is accepted then we isolate again the well from the LFG network and repeat the measure after 15 days | |
| ● The CH4 concentration at well is higher than to the manifold ● The O2 concentration at well is lower than to the manifold ● The suction pressure at manifold is lower than to the well | The horizontal LFG network either is blocked by condensate or is partly damaged | ● STEP 1: Blowing air to the network after wellhead opened ● STEP 2: Repeat the suction pressure measurement after few minutes. If the problem continues to exist then we proceed to the horizontal LFG network problematic branch repair | |
| ● The CH4 concentration at well is higher than to the manifold ● The O2 concentration at well is lower than to the manifold ● The suction pressure at manifold is equal with this at the well | The problem is on horizontal LFG network | Repair the problematic branch of the horizontal LFG network | |
| ● The CH4 concentration at manifold is equal with this at the well ● The O2 concentration at manifold is equal with this at the well ● The suction pressure at manifold is different to this at the well | The problem is on horizontal LFG network | ● STEP 1: Blowing air to the network after wellhead opened ● STEP 2: Repeat the suction pressure measurement after few minutes. If the problem continues to exist then we proceed to the horizontal LFG network problematic branch repair | |
| Non accepted measured parameter | O2 > 7% | ||
| Checked Values | Diagnosis | Recommended Actions | |
| Same recorded values of CH4, O2 and suction pressure for both well and manifold | There is none problem with the LFG horizontal network. The problem is identified on LFG well | ● STEP 1: Measurement of the leachate level at the LFG Well and check if the level is high (<15 m). ● STEP 2: Isolation of the well from the LFG system in the case of high leachate level ● STEP 3: Extract the leachate through a portable pump. The pumped leachate is transported to the wastewater treatment plant by a tanker truck. ● STEP 4: This procedure of above step should be repeated until the successful leachate level drop ● STEP 5: Measure the leachate level from the isolated well after three days ● STEP 6: If the leachate level is accepted, the isolated well is connected again to the LFG system (through the valve at the manifold). We repeat the level measure after three days ● STEP 7a: if the O2 is higher than 7% and leachate level is rising up again (<15 m) then we repeat the above-mentioned steps as many times as required ● STEP 7b: if the O2 is higher than 7% and leachate level is accepted then we isolate again the well from the LFG network and repeat the measure after 15 days | |